Gas-Fired Water Boilers WM97+70/110/155 - CT Boiler Manual • Installation • Maintenance • Startup • Parts Now available Matching High Performance Companion Water Heater (Unit sold separately) This manual must only be used by a qualified heating installer/service technician. Read all instructions, including this manual and all other information shipped with the boiler, before installing. Perform steps in the order given.
WM97+ gas-fired water boiler — Boiler Manual The WM97+70 & 110 Gas-fired water boilers 1. Stainless steel firetube heat exchanger 2. Heat exchanger access cover/burner mounting plate 3. Blower The advanced blower design and air inlet silencer on WM97+ boilers result in very quiet operation. Air enters the boiler enclosure through the air intake adapter (18), flows through the enclosure, enters the air inlet silencer (5), then enters the blower.
WM97+ gas-fired water boiler — Boiler Manual The WM97+70 & 110 Gas-fired water boiler (cont.
WM97+ gas-fired water boiler — Boiler Manual The WM97+155 Gas-fired water boiler 1. Stainless steel firetube heat exchanger 2. Heat exchanger access cover/burner mounting plate 3. Blower The advanced blower design and air inlet silencer on WM97+ boilers result in very quiet operation. Air enters the boiler enclosure through the air intake adapter (18), flows through the enclosure, enters the air inlet silencer (5), then enters the blower.
WM97+ gas-fired water boiler — Boiler Manual The WM97+155 Gas-fired water boiler (continued) Part number 550-142-120/0113 –5–
WM97+ gas-fired water boiler — Boiler Manual Contents The WM97+70 & 110 Gas-fired water boilers . . . . . . . . 2 The WM97+155 Gas-fired water boiler . . . . . . . . . . . . 4 Please read before proceeding . . . . . . . . . . . . . . . . 7 Boiler location . . . . . . . . . . . . . . . . . . . . . . . . . 8 Wall-mounting the boiler . . . . . . . . . . . . . . . . . . . 10 Boiler hydrostatic test . . . . . . . . . . . . . . .
WM97+ gas-fired water boiler — Boiler Manual Please read before proceeding Hazard definitions The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product. Indicates presence of hazards that will cause severe personal injury, death or substantial property damage. Indicates presence of hazards that can cause severe personal injury, death or substantial property damage.
WM97+ gas-fired water boiler — Boiler Manual Boiler location Installations must comply with: • • • • • • Local, state, provincial, and national codes, laws, regulations and ordinances. National Fuel Gas Code, ANSI Z223.1/NFPA 54. National Electrical Code. For Canada only: CAN/CSA B149.1, Natural Gas and Propane Installation Code, and any local codes. The WM97+ boiler gas manifold and controls met safe lighting and other performance criteria when boiler underwent tests specified in ANSI Z21.
WM97+ gas-fired water boiler — Boiler Manual Boiler location (continued) Provide clearances for service access — RECOMMENDED Provide clearances from combustible materials — REQUIRED 1. See Figure 1 for recommended service clearances. 2. If you do not provide minimum service clearances shown, it might not be possible to service the boiler without removing it from the space. 1. See Figure 2 for REQUIRED minimum clearances. ALL installation must provide at least these minimums. 2.
WM97+ gas-fired water boiler — Boiler Manual Wall-mounting the boiler Remove boiler from crate Figure 3 Boiler shipping container (WM97+70 shown) The boiler is heavy. Use caution not to drop the boiler or cause bodily injury while lifting and handling. Verify that the boiler is securely attached to prevent possibility of boiler falling after installation. After the boiler is removed from the shipping carton, DO NOT allow the boiler to sit on its bottom.
WM97+ gas-fired water boiler — Boiler Manual Wall-mounting the boiler (continued) Install the wall-mount bracket and spacer boards (by installer) Figure 5 Place boiler on wall-mount bracket 1. See Figure 4, page 10. 2. Locate the studs — must be on 16-inch centers. See previous page instructions if studs are not on 16-inch centers. 3. Provide and prepare a spacer board (item 3, Figure 4, page 10) to be installed as shown in Figure 4, page 10 and Figure 5. The board must be minimum ½ inch thick.
WM97+ gas-fired water boiler — Boiler Manual Boiler hydrostatic test DO NOT install a relief valve with a pressure higher than 30 PSIG. This is the maximum allowable relief valve setting for the WM97+ boiler. Failure to comply could prevent the relief valve from operating as needed, resulting in possibility of severe personal injury, death or substantial property damage. Use two wrenches when tightening any pipe connection to the boiler.
WM97+ gas-fired water boiler — Boiler Manual Boiler hydrostatic test (continued) Figure 6 Install pipe fittings for relief valve and pressure/temperature gauge — DO NOT mount relief Figure 7 Install piping components required for hydrostatic test (WM97+70/110 shown) (see legend below) valve until AFTER hydrostatic testing (see legend at right) WM97+70 or WM97+110 TOP — WM97+155 1 2 3 3a 4 5 6a 6b 7 8 9 10 11 TOP — 12 13 14 15 16 17 Part number 550-142-120/0113 Boiler supply (outlet) connecti
WM97+ gas-fired water boiler — Boiler Manual Converting boiler to propane — WM97+70/110 Prepare boiler for propane — WM97+70/110 only (if required) Figure 8 Propane gas orifice bushing identification WM97+70 on left (may be stamped 3.85) WM97+110 on right (may be stamped 4.45) 70 Propane operation 110 ALL WM97+ boilers must be converted for propane operation.
WM97+ gas-fired water boiler — Boiler Manual Converting boiler to propane — WM97+70/110 (cont.) Figure 10 Installing the propane gas orifice bushing (some details omitted for clarity) 7. See Figure 10. Insert the propane gas orifice bushing (item 4) into the gas valve outlet as shown. 8. Press the bushing into the gas valve outlet until the bushing flange butts against the gas valve outlet. Inspect the O-rings on the propane gas orifice bushing an on the gas valve outlet (item 5, Figure 10).
WM97+ gas-fired water boiler — Boiler Manual Converting boiler to propane — WM97+155 Prepare boiler for propane — WM97+155 only (when required) Propane operation ALL WM97+ boilers must be converted for propane operation. Support the gas valve after disconnecting from the venturi. DO NOT allow it to hang from the gas valve flex line. When re-attaching the gas valve, ensure the gas valve grommet (item 8, Figure 13) is in place and in good condition.
WM97+ gas-fired water boiler — Boiler Manual Converting boiler to propane — WM97+155 (cont.
WM97+ gas-fired water boiler — Boiler Manual Gas piping — sizing gas lines Boiler gas connection is ½” NPT. Size gas lines large enough to provide gas to all connected appliances. Figure 14 Pipe capacity for 0.60 specific gravity natural gas; pipe length is in equivalent feet Natural Gas: Pipe sizing for natural gas 1. Size gas piping from meter outlet to entrance of boiler in accordance with Figure 14 and Figure 15. 2. Use total input of all connected appliances.
WM97+ gas-fired water boiler — Boiler Manual Venting/air piping — general Do not install the WM97+ boiler into a common vent with any other appliance. This will cause flue gas spillage or appliance malfunction, resulting in possible severe personal injury, death or substantial property damage. Existing common vent systems may be too large for the appliances remaining connected after the existing boiler is removed.
WM97+ gas-fired water boiler — Boiler Manual Venting & air — general (cont.) Figure 17 WM97+ venting and air piping — DIRECT VENT ONLY — OPTIONS and PIPING LIMITS The table below lists the acceptable vent/air pipe terminations described in this manual. Follow all instructions provided to install the vent/air system. NOT SHOWN below, but also approved, are the polypropylene piping and terminations listed in Figure 18, page 21.
WM97+ gas-fired water boiler — Boiler Manual Venting & air — general (cont.
WM97+ gas-fired water boiler — Boiler Manual Commonwealth of Massachusetts installations Commonwealth of Massachusetts — When the boiler is installed within the Commonwealth of Massachusetts, the boiler must be installed by a licensed plumber or gas fitter. Read and comply with the instructions below.
WM97+ gas-fired water boiler — Boiler Manual Vent termination requirements Figure 19 The vent termination must be located to meet all requirements below (also applies to vertical vent terminations). For Canadian installations, defer to the requirements of CSA B149.1 or B149.2 Installation Code.
WM97+ gas-fired water boiler — Boiler Manual Boiler room air openings Figure 20 Combustion and ventilation air openings for WM97+ Direct Vent installations The WM97+ boiler CANNOT be in the same space with other appliances if clearances around the WM97+ are less than the recommended service clearances shown in Figure 1, page 9. Air openings WM97+ boiler WITH other appliances in room The required air opening sizes below are FREE AREA, after reduction for louver obstruction.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Sidewall with W-M vent/air plate Allowable vent/air pipe materials & lengths Figure 21 Installation — W-M sidewall vent/air plate Use only the vent materials and kits listed in Figure 18, page 21. Provide pipe adapters if specified. 1. Locate the termination such that the total air piping and vent piping from the boiler to the termination will not exceed the maximum length given in Figure 17, page 20.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Sidewall with W-M vent/air plate (continued) Install Weil-McLain vent/air cap ADAPTERS — Use adapters if using other than 3-inch PVC or CPVC. This is required for different materials (polypropylene or AL24-4C stainless steel) or if using 2-inch pipe. Vent/air pipes and W-M vent/air plate can be oriented in any of the configurations shown in Figure 21, page 25.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Sidewall with separate pipes Allowable vent/air pipe materials & lengths Figure 25 Installation sequence — Separate pipes sidewall Use only the vent materials and kits listed in Figure 18, page 21. Provide pipe adapters if specified. 1. Locate the termination such that the total air piping and vent piping from the boiler to the termination will not exceed the maximum length given in Figure 17, page 20.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Sidewall with separate pipes (continued) See notices on previous page. Figure 26 Multiple separate pipes sidewall terminations — maintain vertical spacing between vent and air fittings shown in Figure 25, page 27 All vent pipes and air inlets must terminate at the same height to avoid possibility of severe personal injury, death or substantial property damage. 2.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Sidewall concentric Allowable vent/air pipe materials & lengths Figure 28 Installation sequence — Concentric horizontal 1. The concentric termination kit must be purchased separately. Use only the vent materials and kits listed in Figure 18, page 21. Provide pipe adapters if specified. 2.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Sidewall concentric (continued) See notices on previous page. Figure 29 Termination location — concentric termination — multiple boilers — clearance from vent of one to air intake of the next Install termination — concentric pipes 1. Assemble the vent termination as described for concentric terminations, on page 35. If necessary, you can shorten the lengths of the inner and outer pipes for a shorter finished assembly.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Vertical with separate pipes Allowable vent/air pipe materials & lengths Figure 31 Separate pipes vertical termination Use only the vent materials and kits listed in Figure 18, page 21. Provide pipe adapters if specified. 1. Locate the terminations such that the total air piping and vent piping from the boiler to the termination will not exceed the maximum length given in Figure 17, page 20.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Vertical with separate pipes (continued) See notices on previous page. Figure 32 Terminations for multiple boilers Prepare roof penetrations 1. Air pipe penetration: a. Cut a hole for the air pipe. Size the air pipe hole as close as desired to the air pipe outside diameter. 2. Vent pipe penetration: a. Cut a hole for the vent pipe. For either combustible or noncombustible construction, size the vent pipe hole at least 0.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Vertical concentric Allowable vent/air pipe materials & lengths Figure 33 Installation sequence — Concentric vertical 1. The concentric termination kit must be purchased separately. Use only the vent materials and kits listed in Figure 18, page 21. Provide pipe adapters if specified. 2.
WM97+ gas-fired water boiler — Boiler Manual DIRECT VENT — Vertical concentric (continued) See notices on previous page. Figure 34 Vertical termination — 3” PVC concentric — single or multiple boilers 2. Place roof penetrations to obtain minimum of 12 inches between centers of adjacent vent pipe of another boiler for U. S. installations (see Figure 34, page 34). 3. The air inlet of a WM97+ boiler is part of a direct vent connection.
WM97+ gas-fired water boiler — Boiler Manual Concentric termination, typical Figure 36 PVC concentric termination assembly — DO NOT attach the rain cap until the termination has been inserted through the roof or wall and all supports have been installed. See LEGEND at right. See kit instructions for details of polypropylene kits.
WM97+ gas-fired water boiler — Boiler Manual Vent and air piping and boiler connections Follow termination instructions Figure 37 Boiler vent and air connections 1. Read and follow all instructions for the termination type used before proceeding with this page. Follow all instructions provided by vent pipe manufacturer. Use only materials from the manufacturers listed in Figure 18, page 21.
WM97+ gas-fired water boiler — Boiler Manual Install water piping Use two wrenches when tightening water piping at boiler, using one of the wrenches to prevent the boiler interior piping from turning. Failure to support the boiler piping connections to prevent them from turning could cause damage to boiler components. 2. The internal expansion tank is suitable for most systems with total volume of 15 gallons or less.
WM97+ gas-fired water boiler — Boiler Manual Install water piping (continued) Head loss through boiler internal piping Top boiler connections (internal by-pass valve OPEN) 1. See Figure 39 for the head loss through boiler internal piping for boiler top connections. This data is based on primary/ secondary piping (boiler internal by-pass valve OPEN). 2. For the special case of direct connection of WM97+70 or 110 boilers, see the information on page 44.
WM97+ gas-fired water boiler — Boiler Manual Install water piping (continued) Simplified pipe/circulator selection Install relief valve 1. Install the boiler and piping using the recommended piping layouts shown in this manual. 2. Size the piping and components for each circuit in the space heating system using Figure 41. At the flow rates listed, the 1. Install relief valve in ¾” street elbow piped from boiler supply piping tee (Figure 6, page 13). 2.
WM97+ gas-fired water boiler — Boiler Manual Internal water piping — WM97+70 and 110 Set primary/secondary by-pass valve WM97+70 or 110 only 1. The primary/secondary by-pass valve (item 5 in the illustrations at right) allows selecting whether the boiler is direct-connected or primary/secondary connected to the system. a. Close the valve for direct connection (Figure 42). Use this option ONLY if the system piping is connected per the instructions in this manual. b.
WM97+ gas-fired water boiler — Boiler Manual Internal water piping — WM97+155 Set primary/secondary by-pass valve WM97+155 only The internal primary/secondary valve MUST be OPEN for all applications except for installations with multiple WM97+ boilers, piped as shown in this manual. Single-boiler installations require a separate system circulator (or zone circulators). DO NOT attempt to use the boiler internal circulator for system circulation.
WM97+ gas-fired water boiler — Boiler Manual Expansion tank — WM97+70 and 110 Supplementary expansion tank, if required — systems having volumes more than 15 gallons only Figure 46 WM97+70/110 external expansion tank piping, diaphragm or bladder-type 1. The boiler is equipped with an internal diaphragm-type expansion tank, factory charged to 12 PSIG. a. The internal tank is suitable for systems up to 15 gallons, not including the volume of water in the boiler and its internal piping. b.
WM97+ gas-fired water boiler — Boiler Manual Expansion tank — WM97+155 Expansion tank Figure 48 WM97+155 external expansion tank Figure 48 and Figure 49 show typical installations of the system expansion tank. Always locate the air separator and expansion tank as shown in the suggested piping drawings, beginning on page 47. Ensure that the expansion tank size will handle boiler and system water volume and temperature. See tank manufacturer’s instructions and ratings for details.
WM97+ gas-fired water boiler — Boiler Manual System piping ZONE VALVE zoning — direct connection Internal P/S by-pass valve CLOSED WM97+70 or 110 only DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. Figure 51 WM97+70/110 Zone valve zoning — direct connection (boiler primary/secondary by-pass valve CLOSED) Figure 52 The system must meet the following requirements when applying Figure 51 Boiler model WM97+70 WM97+110 MAIN line size (inches) [ ] 1 1 BRANCH line size (inches) [ ] ¾ ¾ Total FLOW, GPM 6.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. CIRCULATOR zoning — primary/secondary Internal P/S by-pass valve OPEN WM97+155 only Figure 56 WM97+155 Circulator zoning plus optional DHW piping The boiler primary/secondary by-pass valve MUST be open to prevent excessive head caused by running the boiler circulator and zone circulators in series. See Figure 56. 1.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. RADIANT HEATING — CIRCULATOR zoning Internal P/S by-pass valve OPEN WM97+70 or 110 only Figure 57 WM97+70/110 Typical radiant heating system piping — circulator zoning See Figure 57. 1. The WM97+ boiler is ideal for use in radiant heating.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. RADIANT HEATING — CIRCULATOR zoning Internal P/S by-pass valve OPEN WM97+155 only Figure 58 WM97+155 Typical radiant heating system piping — circulator zoning See Figure 58. 1. The WM97+ boiler is ideal for use in radiant heating. The unique heat exchanger design allows it to work well even in condensing mode.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. DHW as a zone — CIRCULATOR zoning Internal P/S by-pass valve OPEN WM97+70 or 110 only Figure 59 WM97+70/110 Circulator zoning with DHW as a zone DO NOT use this piping if the boiler is connected to a CWH unit. The CWH unit requires priority and would prevent priority operation of the system DHW unit.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. DHW as a zone — CIRCULATOR zoning Internal P/S by-pass valve OPEN WM97+155 only Figure 60 WM97+155 Circulator zoning with DHW as a zone DO NOT use this piping if the boiler is connected to a CWH unit. The CWH unit requires priority and would prevent priority operation of the system DHW unit.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. WATER CHILLER systems — ZONE VALVES Internal P/S by-pass valve OPEN WM97+70 or 110 only Figure 61 WM97+70/110 Chilled water system plus optional DHW piping See Figure 61 1. OPEN the boiler internal primary/secondary by-pass valve. 2. The chiller must be piped in parallel with the boiler. 3.
WM97+ gas-fired water boiler — Boiler Manual System piping (continued) DHW refers to an indirect-fired domestic hot water storage tank. CWH refers to a WeilMcLain Companion Water Heater. WATER CHILLER systems — ZONE VALVES Internal P/S by-pass valve OPEN WM97+155 only Figure 62 WM97+155 Chilled water system plus optional DHW piping See Figure 62 1. OPEN the boiler internal primary/secondary by-pass valve. 2. The chiller must be piped in parallel with the boiler. 3.
WM97+ gas-fired water boiler — Boiler Manual Multiple boiler installations Placing multiple boilers 1. Locate multiple boilers with spacings shown in Figure 63. 2. Provide indicated clearances around boilers for access and servicing. If recommended dimensions are not possible, provide at least the minimum clearances given on page 9. Also follow local codes. 3. The recommended clearance of 41½ inches below the boiler ensures room for further addition of a CWH unit if desired. 4.
WM97+ gas-fired water boiler — Boiler Manual Multiple boiler installations (continued) Sequencing multiple WM97+ boilers 1. Use a multiple-boiler controller, such as the Weil-McLain BCP, BMC or BSC, to sequence boilers. Locate temperature sensors as required in the controller manual. Maximum connected load per manifold: 2-inch manifold — 450 MBH 3-inch manifold — 1400 MBH 4-inch manifold — 2900 MBH Easy-Fit® piping installation 1. Main header and Easy-Fit® Manifold pipe sizing. a.
WM97+ gas-fired water boiler — Boiler Manual Multiple boiler installations (continued) Figure 67 Piping schematic — typical piping for multiple WM97+ boilers, using Weil-McLain Easy-Fit manifolds (shown using WM97+155 boilers — adjust boiler connections as required for other boiler models) Legend — Figure 67 The boiler internal primary/secondary by-pass valve must be CLOSED for multiple boiler installations piped as shown in this manual.
WM97+ gas-fired water boiler — Boiler Manual Multiple boiler installations (continued) Figure 68 Piping layout — typical piping for multiple WM97+ boilers, using Weil-McLain Easy-Fit manifolds (2-boiler system) (shown using WM97+155 boilers — adjust boiler connections as required for other boiler models) Legend — Figure 68 1 2 3 4 5 6 7 8 9 13 17 The boiler internal primary/secondary by-pass valve must be CLOSED for multiple boiler installations piped as shown in this manual.
WM97+ gas-fired water boiler — Boiler Manual Multiple boiler installations (continued) Figure 69 Piping layout — typical piping for multiple WM97+ boilers, with DHW storage heaters (4-boiler system) (shown using WM97+155 boilers — adjust boiler connections as required for other boiler models) Suggested DHW boiler-side pipe sizing (for max 0.
WM97+ gas-fired water boiler — Boiler Manual Multiple boiler installations (continued) Figure 70 Piping layout — typical piping for multiple WM97+ boilers, using isolation exchanger (shown using WM97+155 boilers — adjust boiler connections as required for other boiler models) Use isolation heat exchanger for: 1. Large volume systems with high mineral content in water. 2. Systems exposed to untreated quantities of makeup water. 3.
WM97+ gas-fired water boiler — Boiler Manual Install condensate line Prepare condensate trap assembly 1. Remove the condensate trap kit from the accessories bag. 2. See Figure 71. The left image shows the complete condensate trap kit. 3. Remove the flexible drain tube nut, item 2. 4. Push the flexible tube gasket ring onto the end of the flexible tube (item 1) as shown in Figure 71. The tube should extend through the gasket (item 3) about ¼ inch. 5.
WM97+ gas-fired water boiler — Boiler Manual Gas piping Use two wrenches when tightening gas piping at boiler, using one wrench to prevent the boiler gas line connection from turning. Failure to support the boiler gas connection pipe to prevent it from turning could damage gas line components. WM97+ boilers are shipped ready to fire natural gas ONLY. You must install the propane orifice bushing if the boiler will be connected to propane. See page 14.
WM97+ gas-fired water boiler — Boiler Manual Field wiring ELECTRICAL SHOCK HAZARD — For your safe- ty, turn off electrical power supply at service entrance panel before making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death. The installation must comply with: National Electrical Code and any other national, state, provincial or local codes or regulations. In Canada, CSA C22.
WM97+ gas-fired water boiler Field wiring — Boiler Manual (continued) Line voltage wiring (120 VAC) Make the following line-voltage connections, some of which depend on your system and how the WM97+ control will be programmed. The callouts below refer to Figure 75. Figure 75 WM97+ line voltage input and output connections (120 VAC) A 120-VAC Power input 1. Provide and install a fused disconnect or service switch (15-ampere rated recommended) as required by applicable codes. 2.
WM97+ gas-fired water boiler Field wiring — Boiler Manual (continued) Low voltage wiring (24 VAC) Make the following low-voltage connections, some of which depend on your system and how the WM97+ control will be programmed. The callouts below refer to Figure 76. Figure 76 WM97+ low voltage input and output connections (24 VAC) H Zone 1 call for heat (space heating or DHW circuit) 1. The WM97+ control provides inputs for up to three zones.
WM97+ gas-fired water boiler — Boiler Manual Wiring diagram — schematic Figure 77 WM97+ schematic wiring diagram (see Figure 78, page 68 for legend and notes) Part number 550-142-120/0113 – 67 –
WM97+ gas-fired water boiler — Boiler Manual Wiring diagram — ladder Figure 78 WM97+ ladder wiring diagram (see Figure 77, page 67 for schematic wiring diagram) – 68 – Part number 550-142-120/0113
WM97+ gas-fired water boiler — Boiler Manual EXPRESS SETUP — using default settings MANDATORY CONTROL SETTINGS — The following settings must be checked and adjusted if necessary: BOILER MODEL and HIGH ALTITUDE in BOILER SETTINGS menu. Also enter information at the MAINTENANCE INFO screen. See instructions on the following pages for menu access and control settings. Figure 79 Using default control settings (No DHW) CIRCULATOR-zoned systems primary/secondary piping 1.
WM97+ gas-fired water boiler — Boiler Manual EXPRESS SETUP — using default settings (continued) Figure 80 Using default control settings (No DHW) ZONE VALVE-zoned systems Figure 81 Using default control settings (No DHW) ZONE VALVE-zoned systems direct connection piping (NOT for WM97+155) primary/secondary piping Legend and guidelines — Figure 80 and Figure 81 Recommendation: Wire zone thermostats to zone valves. Wire zone valve end switches to the ZONE 2 input on the 24-VAC terminal strip.
WM97+ gas-fired water boiler — Boiler Manual WM97+ control operation Temperature settings — You must ensure that the WM97+ control is set for the proper water temperatures for the system. Excessive water temperature can cause significant property damage in some applications. Figure 82 Control sequence of operation Display status graphic (also see Figure 83, page 72) POWER UP • Check the boiler model listed on the power-up screen. If it is not correct, turn off the boiler.
WM97+ gas-fired water boiler — Boiler Manual WM97+ control operation (continued) Figure 83 WM97+ control display screens and typical navigation – 72 – CWH Installations — See Companion Water Heater manual for additional screen information. When the WM97+ control detects the CWH temperature sensors, it automatically enables the CWH screens and CWH control operation.
WM97+ gas-fired water boiler — Boiler Manual ESSENTIAL settings THE CONTROL SETTINGS LISTED BELOW MUST BE MADE BEFORE STARTING THE BOILER. Failure to comply could result in incorrect operation of the boiler, causing possible severe personal injury, death or substantial property damage. Step 1 Read about menu access and navigation on page 74. Step 2 Turn OFF power to the boiler. Step 3 Turn off gas supply to the boiler by closing the boiler’s manual gas valve.
WM97+ gas-fired water boiler — Boiler Manual WM97+ control settings Figure 84 WM97+ control menu access — accessing contractor menus BEFORE PROCEEDING, perform essential control settings as instructed on page 73. CWH Installations — See Companion Water Heater manual for additional screen information. When the WM97+ control detects the combi temperature sensors, it automatically enables the CWH screens and CWH control operation. 5. The CONTRACTOR MENU screen will show: a.
WM97+ gas-fired water boiler — Boiler Manual BOILER SETTINGS menus Figure 85 BOILER SETTINGS menus (see Figure 86, page 76 for setting values and descriptions) Part number 550-142-120/0113 – 75 –
WM97+ gas-fired water boiler — Boiler Manual BOILER SETTINGS menus (continued) BOILER MODEL Check the boiler model against the model listed on the boiler’s rating plate. Change the selection to the correct model if not. Also verify the model number on the WM97+ control display at power-up. Failure to correct could result in severe personal injury, death or substantial property damage. HIGH ALTITUDE If the boiler is installed at an altitude above 5,500 feet, select YES for high altitude.
WM97+ gas-fired water boiler — Boiler Manual HEAT SETTINGS menus Figure 87 HEAT SETTINGS menus (see Figure 89, page 79 for setting values and descriptions) See table below for system type explanations Speed settings — See page 100 for blower speed adjustment procedure and acceptable speeds.
WM97+ gas-fired water boiler — Boiler Manual HEAT SETTINGS menus (continued) HEAT SETTINGS Figure 88 Typical outdoor reset curves 1. The heat settings menus are for setting control operation during space heating. The settings apply to all space heating zones. See Figure 89, page 79 for a listing of menu listings. 2. If DHW is used, the settings for control operation during DHW calls is set under the DHW SETTINGS menus (see Figure 90, page 80). SYSTEM TYPE 1.
WM97+ gas-fired water boiler — Boiler Manual HEAT SETTINGS menus (continued) 4. Boost will continue until the setpoint (target temperature) reaches the MAX SUPPLY setting. 5. The purpose of boost is to compensate for changes in demand not addressed by the reset curve. Typically, set boost to 30 minutes. The factory default is “OFF” — that is, boost is not enabled with default settings. PRE PUMP TIME 1.
WM97+ gas-fired water boiler — Boiler Manual DHW SETTINGS menus Figure 90 DHW SETTINGS menus (see Figure 91, page 81 for setting values and descriptions) CWH Installations — See Companion Water Heater manual for screen information. When the WM97+ control detects the combi temperature sensors, it automatically enables the CWH screens and CWH control operation. DHW SETTINGS BOILER CIRCULATOR SPEED 1. The DHW SETTINGS menus are for setting control operation during DHW operation.
WM97+ gas-fired water boiler — Boiler Manual DHW SETTINGS menus (continued) TEMPERATURES (DHW) DHW priority — The WM97+ control gives priority to DHW operation. During DHW call for heat, the space heating zone ouputs (Zone 2 and Zone 3) are disabled. This continues until the DHW call ends or the DHW MAX ON TIME has elapsed. BOILER SUPPLY 1. The WM97+ control will regulate boiler firing to provide outlet water at this temperature. 2. For most DHW applications, set this to 190°F.
WM97+ gas-fired water boiler — Boiler Manual CIRCULATOR EXERCISING and FREEZE PROTECTION CIRCULATORS menus Figure 92 CIRCULATOR (SYSTEM SETTINGS) menu navigation (see Figure 84, page 74 for access information) Menus Next screen Next screen Next screen DEFAULT Follow information at the bottom of each screen to navigate to next/previous screen or enter/save data SYSTEM SETTINGS CIRCULATOR EXERCISING CIRCULATOR 1: ### CIRCULATOR 2: ### CIRCULATOR 3: ### BOILER CIRC: ### ON/OFF ON/OFF ON/OFF ON/OFF
WM97+ gas-fired water boiler — Boiler Manual DIAGNOSTIC menu Figure 93 DIAGNOSTICS menu navigation (see Figure 84, page 74 for access information) Menus Next screen Next screen Next screen Next screen Follow information at the bottom of each screen to navigate to next/previous screen or enter/save data DIAGNOSTICS TEMPERATURES STATUS: ########## BOILER OUT1: ###°F BOILER OUT2: ###°F BOILER IN: ###°F FLUE 1: ###°F FLUE 2: ###°F OUTDOOR: ###°F INPUTS STATUS: ########## INPUT 1: ### INPUT 2: ### IN
WM97+ gas-fired water boiler — Boiler Manual DIAGNOSTICS menu (continued) Figure 94 DIAGNOSTICS menu details (see Figure 93, page 83 for access information) Menu/Item Units TO RESET ALL HISTORY COUNTERS TO ZERO: Low Value High Value Default To reset all history counters to zero: Enter the DIAGNOSTICS menu. Then press and hold the left and right arrows located below the control display. Hold for 5 seconds. This will cause ALL history to be deleted. To maintain history, reset counters individually.
WM97+ gas-fired water boiler — Boiler Manual DIAGNOSTICS menu (continued) Figure 95 DIAGNOSTICS menu details (continued) (see Figure 93, page 83 for access information) Menu/Item Units TO RESET ALL HISTORY COUNTERS TO ZERO: Lockout History 2 Time & Date Status Manual Reset Auto Reset Inputs Outputs Temperatures Lockout History 3 Time & Date Status Manual Reset Auto Reset Inputs Outputs Temperatures Software Versions Display Main Micro Second Micro Manual Test Mode Status Target Modulation Boiler Out B
WM97+ gas-fired water boiler — Boiler Manual MAINTENANCE, DATE AND TIME menus Figure 96 MAINTENANCE, DATE AND TIME menus — navigation (see Figure 84, page 74 for access information) MAINTENANCE INFO NAME PHONE MODEL CP# INSTALLED LAST DATE NEXT DATE INTERVAL SETTINGS RESET REMINDER SET DATE AND TIME SET YR/MN/DAY/HR/MIN ################ ###-###-#### WM97+ ### ########## MM/DD/YY MM/DD/YY DD/MM/YY ## MONTHS PRESS ENTER TO RESET Figure 97 MAINTENANCE, DATE AND TIME menus — details (see Figure 96 for a
WM97+ gas-fired water boiler — Boiler Manual Startup — fill the system Clean system to remove sediment Antifreeze 1. You must thoroughly flush the system (without boiler connected) to remove sediment. The high-efficiency heat exchanger can be damaged by buildup or corrosion due to sediment. 1. Use only antifreeze listed by Weil-McLain as suitable for use with WM97+ Gas Boilers. See Figure 123, page 119 for information. 2.
WM97+ gas-fired water boiler — Boiler Manual Startup — fill the system (continued) Freeze protection (if used) Follow these guidelines to prevent possibility of severe personal injury, death or substantial property damage: Use only the products listed by WeilMcLain for use with this boiler. See page 119 for information. Thoroughly flush any system that has used glycol before installing the new WM97+ boiler. Review the material safety data sheets (MSDS) are available online.
WM97+ gas-fired water boiler — Boiler Manual Startup — final checks Check for gas leaks Before starting the boiler, and during initial operation, use a leak detector or smell near the floor and around the boiler for gas odorant or any unusual odor. Remove boiler front door and smell the interior of the boiler jacket. Do not proceed with startup if there is any indication of a gas leak. Repair any leak at once. DO NOT adjust or attempt to measure gas valve outlet pressure.
WM97+ gas-fired water boiler — Boiler Manual Startup — final checks (continued) Final checks before starting boiler ❏ ❏❏ Read the instructions to adjust and set up the WM97+ 1. Check around the boiler and inside the boiler jacket for gas odor following the procedure of page 63 of this manual. ❏❏ Verify that the boiler model is set correctly in the WM97+ If you discover evidence of any gas leak, shut down the boiler at once. Find the leak source with bubble test and repair immediately.
WM97+ gas-fired water boiler — Boiler Manual Startup — final checks (continued) Figure 99 Operating instructions (WARNING — Verify that the WM97+ control is set for the correct boiler model before proceeding.
WM97+ gas-fired water boiler — Boiler Manual Startup — final checks (continued) If combustion at either high or low fire is outside the range given in Figure 101, follow the procedure given on page 92 or page 93 for adjusting the throttle screw on the venturi. If throttle screw adjustment does not correct the problem, then shut down the boiler and contact your local WeilMcLain representative. Throttle screw adjustment must be done only by a qualified technician, using calibrated test instruments.
WM97+ gas-fired water boiler — Boiler Manual Startup — final checks (continued) Throttle screw adjustment Figure 101 Acceptable combustion values — WM97+155 ONLY measured values must be within the ranges given below DO NOT attempt to adjust the throttle screw unless by a quali- fied technician, and with the use of calibrated combustion test instruments. Adjust the throttle screw only as needed to meet the combustion values given in Figure 101. 1.
WM97+ gas-fired water boiler — Boiler Manual Check-out/startup verification Adjust and test boiler controls ❏❏ WM97+ control operation for space heating and DHW (if 1. Follow instructions in this manual to set and verify operation of the boiler controls. 2. Follow low water cutoff manufacturers instructions. 3. If a Companion Water Heater is installed with the WM97+, verify that the mixing valve is installed and functional. Follow all instructions in the CWH manual.
WM97+ gas-fired water boiler — Boiler Manual Annual startup and general maintenance Follow the service and maintenance procedures given throughout this manual and in component literature shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or system. Failure to follow the directions in this manual and component literature could result in severe personal injury, death or substantial property damage.
WM97+ gas-fired water boiler — Boiler Manual Annual startup Handling ceramic fiber materials REMOVING BURNER GASKET or COVER PLATE INSULATION The WM97+ cover plate refractory contain ceramic fiber material. Ceramic fibers can be converted to cristobalite in very high temperature applications. The International Agency for Research on Cancer (IARC) has concluded, “Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group 1).
WM97+ gas-fired water boiler — Boiler Manual Annual startup (continued) Clean condensate trap The boiler should be inspected and started annually, at the beginning of the heating season, only by a qualified service technician. In addition, the maintenance and care of the boiler designated in Figure 103, page 95 and explained on the following pages must be performed to assure maximum boiler efficiency and reliability. Failure to service and maintain the boiler and system could result in equipment failure.
WM97+ gas-fired water boiler — Boiler Manual Annual startup (continued) Check air openings 1. Verify that combustion and ventilation air openings to the boiler room and/or building are open and unobstructed. 2. Check operation and wiring of automatic combustion air dampers, if used. 3. Verify that boiler vent discharge and air intake are clean and free of obstructions. Flue vent system and air piping 1.
WM97+ gas-fired water boiler — Boiler Manual Annual startup (continued) Check ignition wiring 1. Check ignition cable electrical resistance. A good cable will have resistance between 950 and 1050 ohms. Replace if not acceptable. 2. Inspect boiler ground wire from heat exchanger access cover to ground terminal screw. 3. Verify all wiring is in good condition and securely attached. 4. Check ground continuity of wiring using continuity meter. 5. Replace ground wires if results are not satisfactory.
WM97+ gas-fired water boiler — Boiler Manual Annual startup (continued) Check blower speeds 1. For installations at altitudes above 5,500 feet, make sure the control is set up for high altitude in the boiler setup menu. The WM97+ control automatically adjusts low fire and ignition rates to compensate for high altitude conditions.
WM97+ gas-fired water boiler — Boiler Manual Annual startup (continued) Check boiler relief valve 1. Inspect the relief valve and lift the lever to verify flow as in the following warnings, excerpted from a relief valve manufacturer’s warning label. Before operating any relief valve, ensure that it is piped with its discharge in a safe area to avoid severe scald potential. 2. Read page 39 before proceeding further. 3.
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting VERIFY PROPER OPERATION AFTER SERVICING BEFORE TROUBLESHOOTING — Before calling for troubleshooting assistance, fill in the “WM97+ Gas Data Collection Sheet” (page 136). Record the boiler size and CP number (located on the inside left side of the jacket above the heat exchanger). Failure to adhere to these guidelines can result in severe personal injury, death or substantial property damage.
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Check WM97+ control fuses 1. 2. 3. 4. 5. Figure 109 Control housing lifted to slot 2 (jacket ALWAYS check WM97+ control fuses before replacing WM97+ control or any major components (blower, etc.). If one of these fuses is blown, it can prevent WM97+ control or other components from operating. Turn OFF power to boiler at external line switch. Then remove the jacket door. Access the WM97+ control fuses. a. See Figure 109.
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Make sure to determine the causes of outages. Do not leave the boiler operating without a complete diagnosis. WM97+ control fault indications 1. The WM97+ control provides diagnostic information for both automatic reset conditions and manual reset conditions. See Figure 84, page 74 for information available on the WM97+ control display and navigation instructions for all menus. Figure 112 – 104 – 2.
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Figure 113 Troubleshooting suggestions for WM97+ boilers — WM97+ control Error Condition Log The WM97+ control is able to record information about the boiler’s condition at the time of the three previous faults or errors. This information is available to view in Contractor Menus under “DIAGNOSTICS” by selecting “ERRORS.
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Figure 114 Troubleshooting suggestions for WM97+ boilers — Fault displays, diagnostics and corrective actions Display Nothing shown on display screen and boiler will not respond to call for heat Nothing is shown in display screen and no other boiler components are operating Nothing is shown on display screen, but boiler is operating TEMP RISE TOO QUICKLY SUPPLY 58F > RETURN Condition Control is not receiving 24V power Diagnost
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Figure 114 Troubleshooting suggestions for WM97+ boilers — Fault displays, diagnostics and corrective actions (cont.) Display Condition TEMPERATURE SENSOR Occurs if a temperature sensor has electrically shorted (SHORT) or has become disconnected (OPEN).
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Figure 114 Troubleshooting suggestions for WM97+ boilers — Fault displays, diagnostics and corrective actions (cont.) Display LIMIT OPEN HIGH TEMP LIMIT Condition Occurs if manual or automatic reset limit opens. Boiler temperature sensor reached High Temp Limit setting (no higher than 200°F) Diagnostics Corrective Action(s) Automatic external limit will reset 2½ minutes after external limit device closes.
WM97+ gas-fired water boiler — Boiler Manual Troubleshooting (continued) Figure 114 Troubleshooting suggestions for WM97+ boilers — Fault displays, diagnostics and corrective actions (cont.) Display Condition Diagnostics Corrective Action(s) BLOWER FAULT Blower unable to reach required speed or does not reach 0 RPM when turned off.
WM97+ gas-fired water boiler — Boiler Manual Maintenance DO NOT SERVICE THE BOILER WITHOUT A WM97+ MAINTENANCE KIT AVAILABLE Boiler circulator repair Circulator cartridge replacement The WM97+ maintenance kit includes components that may have to be replaced when accessing or disassembling parts of the boiler. 1. The circulator supplied with the boiler is a water-lubricated, cartridge-type circulator.
WM97+ gas-fired water boiler — Boiler Manual Maintenance (continued) Cleaning the heat exchanger WATER SIDE, when required 1. Isolate the boiler from the heating system. 2. Obtain Sentinel X400 cleaner from Weil-McLain. Follow instructions supplied with the cleaner to clean the boiler heat exchanger. Use ONLY the cleaning product available from WeilMcLain, Sentinel X400. See the Repair Parts section at the end of this manual for ordering information.
WM97+ gas-fired water boiler — Boiler Manual Cleaning heat exchanger flue side, 70/110 Cleaning the WM97+70 or 110 heat exchanger FLUE SIDE or accessing the burner, if required The boiler contains ceramic fiber materials. Use care when handling these materials per instructions on page 96 of this manual. Failure to comply could result in severe personal injury.
WM97+ gas-fired water boiler — Boiler Manual Cleaning heat exchanger flue side, 70/110 (continued) Figure 119 Accessing the burner or heat exchanger (see Legend on next page) Part number 550-142-120/0113 – 113 –
WM97+ gas-fired water boiler — Boiler Manual Cleaning heat exchanger flue side, 70/110 (continued) • swirl the burner thoroughly in a bucket of mild liquid laundry detergent water, then rinse thoroughly. e. Inspect the burner exterior. It must be in good condition, with no visible damage. f. Inspect the burner gasket. If the gasket is damaged, obtain a new gasket before re-installing the burner. Inspect and clean the heat exchanger 1.
WM97+ gas-fired water boiler — Boiler Manual Cleaning heat exchanger flue side, 155 Cleaning the WM97+155 heat exchanger FLUE SIDE or accessing the burner, when required The boiler contains ceramic fiber materials. Use care when handling these materials per instructions on page 96 of this manual. Failure to comply could result in severe personal injury. Tools required 1. 2. 3. 4. Metric wrench or socket, 10 mm. Phillips head screwdriver, #2. Torque wrench. Putty knife. Before proceeding: 1.
WM97+ gas-fired water boiler — Boiler Manual Cleaning heat exchanger flue side, 155 (continued) Inspect refractory and replace burner gasket 1. See Figure 121, page 117 part D. a. Inspect the refractory to make sure it is intact, with no visible damage. b. If the refractory must be replaced, use a wide-blade putty knife to gently pry the refractory from the heat exchanger cover plate. The refractory is attached with silicone adhesive and should separate with a little pressure on the putty knife.
WM97+ gas-fired water boiler — Boiler Manual Cleaning heat exchanger flue side, 155 (continued) Figure 121 Accessing the burner or heat exchanger (see Legend on next page) Part number 550-142-120/0113 – 117 –
WM97+ gas-fired water boiler — Boiler Manual Replacement parts DO NOT SERVICE THE BOILER WITHOUT A WM97+ MAINTENANCE Failure to adhere to these guidelines can result in severe personal injury, death or substantial property damage. KIT AVAILABLE The WM97+ maintenance kit includes components that may have to be replaced when accessing or disassembling parts of the boiler.
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 123 Item Miscellaneous parts and kits Description Part Number Item 100 592-900-004 Corrosion inhibitor, Sentinel X100 . . . . . . 592-900-002 Sentinel X100 Quick Test Kit . . . . . . . . . 592-900-005 Cleaner, Sentinel X400 . . . . . . . . . . . .
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 124 Jacket parts — WM97+70/110/155 (see Figure 125, page 121 for illustration) Item Name Description / contents Part Number 70 / 110 155 100 Front door Front door, seals, logo, and labels 383-700-116 383-700-116 110 Front door to jacket seals Seals for front door to jacket 383-700-117 383-700-117 120 Wall-mount bracket (wall side) Bracket and hardware 383-700-118 383-700-118 130 Wall-mount bracket (b
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 125 Jacket assembly — WM97+70/110/155 (see Figure 124, page 120 for part numbers) Go to www.weil-mclain.
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 126 Item Heat exchanger parts WM97+70/110 (see Figure 127, page 123 for illustration) Name Part Number 100 Heat exchanger 319-100-000 105 Heat exchanger with condensate dish, assembled (includes items 100, 120, 130 and 140) 383-700-175 110 Heat exchanger, condensate dish, cover plate, burner, igniter, sight glass, refractory, water sensors, gaskets, silicone, and hardware (includes items 120 through 240) 383-7
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 127 WM97+70/110 heat exchanger assembly (see Figure 126, page 122 for part numbers) Go to www.weil-mclain.
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 128 Item Heat exchanger parts WM97+155 (see Figure 129, page 125 for illustration) Name Part Number 100 Heat exchanger 383-700-197 105 Heat exchanger with condensate dish, assembled (includes items 100, 160, 170 and 180) 383-700-198 110 Heat exchanger, condensate dish, cover plate, burner, igniter, sight glass, refractory, water sensors, gaskets, silicone, and hardware (includes items 120, ) 383-700-180 120
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 129 WM97+155 heat exchanger assembly (see Figure 128, page 124 for part numbers) Part number 550-142-120/0113 – 125 –
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 130 Piping components for WM97+70/110 (see Figure 131, page 127 for illustration) Item Name Description / contents Part Number 100 Upper water pipes Upper pipe assembly and gaskets (1 pump, 2 water) 383-700-144 110 Lower water pipes Lower pipe assembly and gaskets (1 pump, 2 water) 383-700-145 120 Water gaskets Seal pipe to heat exchanger or upper pipe to lower pipe 590-300-036 130 Pump gasket Gasket to
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 131 Piping components for WM97+70/110 (see Figure 130, page 126 for part numbers) Go to www.weil-mclain.
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 132 Piping components for WM97+155 (see Figure 133, page 129 for illustration) Item Name Description / contents Part Number 100 Supply manifold Boiler supply pipe and hardware 383-700-193 105 Supply and return gaskets Boiler supply and return connection seals 590-300-036 110 Upper return manifold Boiler return pipe and hardware 383-700-192 120 Lower return manifold Lower return manifold and hardware 38
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 133 Piping components for WM97+155 (see Figure 132, page 128 for part numbers) Go to www.weil-mclain.
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 134 Controls and electrical components — WM97+70/110/155 (see Figure 135, page 131 for illustration) Item Name Description / contents Part Number 100 Flue temperature sensor One sensor 511-724-292 110 Outdoor temperature sensor One sensor 510-312-218 120 Low water cutoff (not shown here — see Figure 130, page 126) Low water cutoff 571-100-006 130 Transformer 120v/24v 50 Va transformer 511-802-015 Wire
WM97+ gas-fired water boiler — Boiler Manual Replacement parts (continued) Figure 135 Controls and electrical assemblies — WM97+70/110/155 (see Figure 134, page 130 for part numbers) Go to www.weil-mclain.
WM97+ gas-fired water boiler — Boiler Manual Dimensions Figure 136 Dimensional data — WM97+70/110/155 (all dimensions in inches) TOP TOP TOP (shows field-installed components) (shows field-installed components) RIGHT FRONT FRONT 70/110 1 2 3 4 5 6 7 155 BOTTOM BOTTOM (shows field-installed components) (shows field-installed components) Boiler supply tapping — 1” NPT (70/110) / 1¼” NPT (155) Boiler return tapping — 1” NPT (70/110) / 1¼” NPT (155) Control panel, with display and navigatio
gas-fired water boiler WM97+ — Boiler Manual Ratings — WM97+ boilers Figure 137 Ratings and engineering data — WM97+70/110/155 DOE CSA Output / DOE Heating capacity CSA Input Net I=B=R water rating DOE Seasonal Efficiency Btuh Btuh Btuh AFUE, % (Note 2) (Note 5) (Note 3) (Note 1) 65,000 70,000 57 95.2 110-CT 101,000 110,000 88 155-CT 143,000 155,000 124 Boiler Model WM97+ Boiler Water Content Vent/ Comb.
WM97+ gas-fired water boiler — Boiler Manual Ratings — Multiple WM97+ boilers Figure 138 Ratings and engineering data — multiple WM97+ boilers DOE Boilers in system Model WM97+ 70 110 155 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 Total CSA input CSA Output / DOE Heating capacity Boiler H.P.
WM97+ gas-fired water boiler — Boiler Manual Installation and Service Certificate Boiler Start-Up Data Boiler Model / Series WM97+ ________ / Series ____ CP Number ____________ FUEL: Natural ____ LP ____ Date installed ________________ CO2 @: High fire ______% Low fire ______% Btu Input ___________________ CO @: High fire ____ ppm Low fire ____ ppm Flame signal on control display at high fire __________________ Was orifice changed? _________ Flame signal on control display at low fire __________
WM97+ gas-fired water boiler — Boiler Manual WM97+ Gas Boiler Data Collection Sheet Customer Info: Maintenance Info: Name: Phone: Model: CP#: Installed: Contact: Contractor: Job name: City, state: Distributor: System Components: Near boiler pipe size: Boiler circulator speed: DHW tank (yes/no): DHW direct/system: DHW model: DHW pipe size: DHW circulator model: Is there air in system?: CWH installed (yes/no): Diagnostic Errors: Control fault: Ignition retries: Manal reset CNT: Auto reset CNT: Software V
