CF-CH(E)-I-S-10 INSTALLATION AND SERVICE MANUAL HYDRONIC HEATING BOILERS and DOMESTIC WATER HEATERS 399,999 - 2,070,000 Btu/hr MODELS WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. – Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance.
Hydronic Heating Boilers and Domestic Water Heaters Table of Contents Table of Contents General Product Information ..................................................3 Special Instructions ..........................................................3 Unpacking ........................................................................3 Codes................................................................................3 Warranty ..........................................................................
Installation and Service Manual GENERAL PRODUCT INFORMATION • Wash potentially contaminated clothes separately from other clothing. Rinse clothes thoroughly. • NIOSH stated First Aid: Special Instructions Eye: Irrigate immediately. Breathing: Fresh air. This manual supplies information for the installation, operation and servicing of the appliance. Read and understand this manual completely before installing unit.
Hydronic Heating Boilers and Domestic Water Heaters SAFETY INFORMATION 3. Boilers and water heaters are heat producing appliances. To avoid damage or injury, do not store materials against the appliance or the vent-air intake system. Use proper care to avoid unnecessary contact (especially children) with the appliance and vent-air intake components. The information contained in this manual is intended for use by qualified professional installers, service technicians or gas suppliers.
Installation and Service Manual PRODUCT IDENTIFICATION Front View Rear View FIG.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Clearances from Combustible Construction Maintain minimum specified clearances for adequate operation. Allow sufficient space for servicing pipe connections, pump and other auxiliary equipment, as well as the unit. See rating plate for specific service clearance requirements.
Installation and Service Manual Base for Combustible Floors The value of TMIN can be changed to a value between 1°F and 20°F. This will cause the unit to continue pump operation until the T is less than the value selected (30 second minimum). There are no manufactured combustible floor base kits available for 990,000 - 2,070,000 Btu models. See Table-A below for floor base kits that are available. A value of “ON” is selectable through the control for TMIN. This will operate the pump continuously.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued 4. Glycol is denser than water and changes the viscosity of the system. The addition of glycol will decrease heat transfer and increase frictional loss in the boiler and related piping. A larger pump with more capacity (15% to 25% more) may be required to maintain desired flow rates and prevent a noise problem in a glycol system.
Installation and Service Manual Combustion Air Options CAUTION: Under no circumstances should the mechanical room ever be under a negative pressure. Particular care should be taken where exhaust fans, attic fans, clothes dryers, compressors, air handling units, etc., may take away air from the unit. This unit has four combustion air options. 1. Outside Combustion Air, No Ducts You can direct outside combustion air to this unit using either one or two permanent openings.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued 4. Combustion Air from Interior Space You can direct combustion air to this unit using air from an adjoining interior space. You must provide two openings from the boiler room to the adjoining room. Each of the two openings must have a net free area of one square inch per 1000 Btu input (22cm2 per kW), but not less than 100 square inches (645cm2). FIG. 7 Outside Combustion Air - Two Openings 2.
Installation and Service Manual Exhaust Fans Vertical Vent Termination Clearances Any fan or equipment which exhausts air from the boiler room and Location may deplete the combustion air supply and/or cause a down draft in the venting system. Spillage of flue products from the venting system into an occupied living space can cause a very hazardous condition that must be immediately corrected.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued Sidewall Vent Termination Clear ances and Location MORE THAN 10' Locate the bottom of the vent terminal at least 12 inches (30cm) above grade and above normal snow levels. Locate the bottom of the vent terminal at least 7 feet (2.13m) above grade when located adjacent to public walkways. Do not terminate directly above a public walkway. 10' RIDGE 2' MIN.
Installation and Service Manual Length of Air Inlet Pipe TABLE - B Flue and Air Inlet Pipe Sizes Input Flue Air Inlet Btu/hr Size Size 399,999 500,000 650,000 750,000 990,000 1,260,000 1,440,000 1,800,000 2,070,000 6" 6" 8" 8" 10" 12" 12" 14" 14" 6" 6" 8" 8" 10" 12" 12" 12" 12" The installed length of air inlet pipe from the unit to the outside air inlet cap must not exceed 50 equivalent feet (15.2m). Subtract 5 feet (1.5m) of equivalent length for each 90° elbow. Subtract 2.5 feet (0.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION You must install the combustion air inlet cap and the powered vent cap on the same wall and in the same pressure zone. Continued Do not install the combustion air inlet cap closer than 10 feet (3.05m) from an inside corner of an L-shaped structure.
Installation and Service Manual If the air inlet cap is within a 10-foot (3.05m) radius of the flue outlet, the point of termination for the combustion air inlet cap must be at least 3 feet (0.91m) below the point of flue gas termination (vent cap). 4. Horizontal DirectAire™ Venting This option uses a powered vent assembly to exhaust the flue products out a sidewall. Combustion air is supplied by a pipe from the sidewall. See page 21 for venting details.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued Connecting to a positive pressure stack may cause flue products to be discharged into the living space causing serious health injury. 1. Conventional Negative Draft Venting Flue Outlet Piping With this venting option, you must use Type-B double-wall (or equivalent) vent materials. Vent materials must be listed by a nationally-recognized test agency for use as vent materials.
Installation and Service Manual 3. If possible, close all building doors and windows. Close all doors between the space in which the appliances remaining connected to the common venting system are located and other building spaces. 4. Turn on clothes dryers and any other appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued Vent Kits The Vertical DirectAire™ vent system requires you to install two vent pipes directly to the unit; one vertical pipe with a rooftop termination for the flue products and one pipe for combustion air. For this venting option, you must purchase the DV box adapter from the appliance manufacturer. The DV box attaches to the air inlet of the unit. The pipe for combustion air attaches to the DV box.
Installation and Service Manual in a venting kit provided by the appliance manufacturer. See TABLE–E for kit numbers.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued The following is a detailed explanation of Sidewall Venting Without an External Power Vent Fan installation requirements. Flue Outlet Piping Venting Guidelines If using this venting option, a sealed AL29-4C venting system for flue products is required on all models of this appliance. This venting system operates with a positive pressure in the vent.
Installation and Service Manual Masonry Chimney Installation A masonry chimney must be properly sized for the installation of a high efficiency gas-fired appliance. Venting of a high efficiency appliance into a cold or oversized masonry chimney can result in operational and safety problems. Exterior masonry chimneys, with one or more sides exposed to cold outdoor temperatures, are more likely to have venting problems.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued TABLE-F Horizontal DirectAire™ Kits FIG. 23A Horizontal DirectAire Installation (Illustration with Sidewall Venter and Sidewall Combustion Air) Combustion air supplied from outdoors must be free of contaminants (see Combustion and Ventilation Air, page 8).
Installation and Service Manual When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls, ceilings, and floors. Locate the unit as close as possible to chimney or gas vent. Drain Tee Installation A drain tee must be installed in the vent pipe to collect and dispose of any condensate that may occur in the vent system. The drain tee must be installed as the first fitting after the horizontal ell on the top of the unit (see FIG. 23B).
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued Heat-Fab, Inc. Saf-T CI Vent. 1-800-772-0739. Protech Systems, Inc. Fas-N-Seal Vent. 1-800-766-3473. Horizontal DV Venting Termination Metal-Fab, Inc. Corr/Guard Vent. 1-800-835-2830. Horizontal venting uses the unit’s internal combustion air blowers to force the flue products out of the horizontallyterminated flue.
Installation and Service Manual For venting versatility, you can move the air filter assembly and DV box adapter to the right side of the unit. Remove the metal panel on the unit’s right side (see FIG. 25). Remove the filter/bracket assembly from the rear of the unit. Attach the filter/bracket assembly and DV box adapter to the right side opening using the pre-drilled screw holes. Make sure you attach the metal panel to the rear combustion air opening of the unit.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued Vertical Combustion Air Inlet Clearances You must locate the air inlet termination elbow at least 12" (30cm) above the roof or above normal snow levels. WARNING: Locate and install the combustion air inlet termination correctly. Failure to do so can allow the discharge of flue products to be drawn into the combustion process.
Installation and Service Manual WARNING: Only install outdoor models outdoors and only use the vent cap supplied by the appliance manufacturer. Personal injury or product damage may result if any other cap is used or if an outdoor model is used indoors. Properly install all covers, doors and jacket panels to ensure proper operation and prevent a hazardous condition. Combustion air supply must be free of contaminants (see Combustion and Ventilation Air, page 8).
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Gas Piping Continued CONNECTING TO GAS SUPPLY To safely operate this unit, you must properly size the gas supply piping. See TABLES-J, K, & L for piping and fitting requirements. Gas pipe size may be larger than heater connection. Only supply gas type specified on the unit’s rating plate. This unit is orificed for operation up to 2000 feet altitude. If installing above 2000 feet elevation, consult the appliance manufacturer.
Installation and Service Manual Gas Train and Controls Note: The gas train and controls assembly provided on this unit have been tested under the applicable American National Standard to meet minimum safety and performance criteria such as safe lighting, combustion and safety shutdown operation. COMBINATION VALVE DOWNSTREAM TEST VALVE FIG. 28 Gas Line Connection TO BURNERS 2. Use new, properly threaded black iron pipe free from chips.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION installed main manual gas cock or gas piping. Install a fitting in the inlet pressure tapping suitable to connect to a manometer or magnehelic gauge. Range of scale should be 14" w.c. or greater to check inlet pressure. Continued Water heater models do not have downstream test valves, but the rest of the gas train is represented by Figure 29. Combination Gas Valves These units fire in multiple stages of burner input.
Installation and Service Manual Gas Manifold Pressure Adjustment Check burner performance by cycling the system while you observe burner response. Burners should ignite promptly. Flame pattern should be stable, see Burner Flames, page 56. Turn system off and allow burners to cool, then cycle burners again to ensure proper ignition and flame characteristics.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued 18. Replace top front upper jacket access panels and control panel door in reverse order. 4. Locate the reference hose on the second gas valve which goes from the vent fitting on the gas valve to a barbed fitting on the deck of the unit (see FIG. 31). 5. Remove the flexible cap from the barbed fitting on the “tee” located in this line and hook one side of the manometer, or (-) side of a magnehelic gauge, to this “tee”.
Installation and Service Manual unit’s terminal strip. This wiring connection installs the flow switch in the 24 VAC safety circuit to prove water flow before main burner ignition. The factory supplied flow switch is installed in the outlet side of the front header. The 399,999 - 750,000 units require a minimum flow of 15 - 18 GPM whereas the 990,000 - 2,070,000 units require a minimum flow of 26 GPM to make the flow switch and start burner operation.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued CAUTION: This boiler system should not be operated at less than 12 PSIG. 1. Use only Type-T wire [63°F (35°C) rise] on all wiring between the unit and field-installed devices. Provide suitable hangers or floor stands to support hot water piping. The boiler alone should not support hot water piping. Copper pipe systems are subject to considerable expansion and contraction.
Installation and Service Manual Example: The boiler inlet temperature is 160°F (71°C) and the boiler outlet temperature is 180°F (82°C), this means that there is a 20°F (11°C) temperature rise across the boiler. Heat Exchanger Pressure Drop Chart factory supplied pump control system must not exceed 10 AMPS at 120VAC.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued TABLE - O LTV Valve Kits Input Btu/hr LTV Valve Kit 399,999 - 750,000 VAL3048 990,000 - 2,070,000 VAL3047 Be sure to install the LTV valve per the piping diagrams included with the kits. Alternatively, a bypass as shown in FIG. 38 may be piped into the system. This piping is like a primary/secondary boiler installation with a bypass in the secondary boiler piping.
Installation and Service Manual Radiant Floor and Snow Melt Heating Systems This type of heating boiler application operates in a low temperature range which requires a boiler bypass as described under Low Temperature Return Water Systems. A non-metallic rubber or plastic tubing installed in a radiant (in floor) system must have an oxygen barrier to prevent oxygen from entering the system through the walls of the installed tubing.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued Placing the Boiler in Operation Boiler Flow Rate Filling the System CAUTION: The maximum flow rate through All air must be purged from the system for proper operation. An air scoop and air vent must be located close to the boiler outlet and there should be a minimum distance between the cold water feed and the system purge valve.
Installation and Service Manual 9. Inspect the liquid level in the expansion tank. The system must be full and under normal operating pressure to ensure proper water level in the expansion tank. Ensure that diaphragm type expansion tanks are properly charged and not water logged. 10. Start the boiler according to the operating instructions in this manual. Operate the system, including the pump, boiler and radiation units, for one hour. 11. Recheck the water level in the expansion tank.
Hydronic Heating Boilers and Domestic Water Heaters INSTALLATION Continued FIG. 42-D shows the connections necessary to operate the unit as a 2-Stage (High/Low Fire) boiler or water heater from an Energy Management System (EMS). The electronic control MUST be set to Mode 3 for this to properly operate. The value of BOIL MAX should be adjusted to a level that will function as a high temperature stop. The actual set point temperatures are controlled by the EMS.
Installation and Service Manual Remote On/Off Remove Factory Jumper if Jumper Wire is Added.
Hydronic Heating Boilers and Domestic Water Heaters OPERATION Continued WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. • Do not touch any electric switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbors phone. • Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. C. Use only your hand to turn the gas control lever. Never use tools.
Installation and Service Manual To Turn Off Gas To Appliance WARNING: Return water temperatures must 1. Open the front access panel to access control panel. not be less than 140°F. If lower return water temperatures are required, follow the instructions for Low Temperature Return Water Systems, page 36. 2. Turn power switch to “OFF” position. 3. Turn the manual gas cock clockwise to the “OFF” position.
Hydronic Heating Boilers and Domestic Water Heaters OPERATION Continued TABLE-Q Adjust Menu Settings for Operating Modes Mode 1 Mode 1 (No Outdoor Sensor) STG MODE (**Models 650 - 990) *BOIL MAX *SEn (no system sensor) Set point TARGET 1 / DIFF 1 Set point TARGET 2 / DIFF 2 (Outdoor Sensor) STG MODE (**Models 650 - 990) OUTDR START OUTDR DSGN BOIL START BOIL DSGN Set point TARGET 3 / DIFF 3 WWSD Set point TARGET 4 / DIFF 4 (** Models 1260 - 2070 only) *STG DLY *T MIN *BOIL MAX *T MAX units *BOIL
Installation and Service Manual OUTDR DSGN Design outdoor air temperature used in the heat loss calculations. You can program the different values within each mode to control the operation, stages, differentials, water temperature, and pump operation. BOIL START Starting temperature of the boiler heating curve at outdoor starting temperature. Programming Buttons Program and navigate the temperature control using the three programming buttons located under the LCD screen.
Hydronic Heating Boilers and Domestic Water Heaters OPERATION Continued Scroll through the different settings by pressing the “Select” button. Change settings by pressing either the “+” button or the “–” button. If no buttons are pushed after a few seconds, the control will time-out and return to the “View” menu. TABLE–Q, page 44 lists the Adjust Menu settings for the different operation modes. Access Levels As outside temperatures drop, the control will increase the temperature to the boiler.
Installation and Service Manual System Sensor: This is used for boiler applications. This sensor will control the water temperature within the building loop. Stage 1 and 2 are independent of stage 3 and 4. Stage 2 cannot fire before stage 1 and stage 4 cannot fire before stage 3. Staging Logic PID Staging Logic (Outdoor Air Mode 1 Only) There are two different types of staging logic used in the temperature control; Proportional (step) Staging Logic and PID Staging Logic.
Hydronic Heating Boilers and Domestic Water Heaters OPERATION Continued TABLE-S Programming Worksheet To program settings for Mode 1 operation, press in and hold the three programming buttons for 3 seconds. The screen will change from the View Menu to the Adjust Menu. “Adjust” will appear in the upper right corner of the screen. Just under the word “Adjust” will be either the number 1, 2, or 3. Press the “+” or “–” button to select the number “1”. This places the control into Mode 1.
Installation and Service Manual 3. .Do not locate temperature sensor wiring near electric motors. 4. Do not locate temperature sensor wiring near welding equipment. 5. Make sure good mechanical connections are made to the sensor, any interconnecting wiring and the controller. 6. Do not mount sensor with leadwire end pointing up in an area where condensation can occur. 7. Use shielded wiring to connect the sensor to the control when the possibility of an electrically noisy environment exist.
Hydronic Heating Boilers and Domestic Water Heaters OPERATION Continued each of the boiler’s indicating lights and a clear window to view the digital temperature display from the electronic temperature control. The thermostat and diagnostic light board are mounted to the back of the control panel door. Diagnostic Status Indication The ignition module has an LED which indicates the status of the safety circuits.
Installation and Service Manual CAUTION: Control panel is heavy and awkward to handle when removed. Carefully support the control panel when removing. Ignition and Control Timings Proven Pilot Hot Surface Ignition System M-9 on 990,000 through 2,070,000 Btu/hr models with two hot surface ignition modules. Hot Surface Ignition Module Timings (Nominal) Prepurge: 15 Seconds Hot Surface Igniter Heat-up Time: FIG.
Hydronic Heating Boilers and Domestic Water Heaters DOMESTIC WATER HEATERS 3. Check the pump to be sure it is running properly and that the pump motor is running in the proper direction (see arrow on volute housing). This section applies only to those units used to supply potable hot water for domestic use. The hot water supply boiler must be installed with a storage tank. 4.
Installation and Service Manual potable water exceeding these specifications. Heating of high hardness and/or high total dissolved solids water will require a larger circulating pump, an optional cupro-nickel heat exchanger and a revised temperature rise specification based on the water chemistry of the water to be heated.
Hydronic Heating Boilers and Domestic Water Heaters DOMESTIC WATER HEATERS Continued Potable Hot Water Temperature Control Settings This pump is sized based on installation of a single storage tank and heater in close proximity. If the number of fittings and straight pipe exceeds the quantities shown in this section, a larger pump will be required. The standard pump selection is based on the following pipe and fittings from the unit to the storage tank: Not more than 45 feet of straight pipe.
Installation and Service Manual • Water temperature over 125°F (52°C) can cause severe burns instantly or death from scalds. • Children, disabled and elderly are at highest risk of being scalded. • See instruction manual before setting temperature at heating appliance. • Feel water before bathing or showering.
Hydronic Heating Boilers and Domestic Water Heaters CLEANING AND MAINTENANCE Lifting Flames: The usual causes for lifting flames are over firing the burner(s), excessive primary air, or high draft. If you observe improper flame patterns, examine the venting system, ensure proper gas supply, and ensure adequate supply of combustion and ventilation air. Listed below are items that must be checked to ensure safe reliable operations. Verify proper operation after servicing.
Installation and Service Manual Heat Exchanger Cleaning Combustion and Ventilation Air 1. While burners are removed, check the heat exchanger surface for sooting. If present, heat exchanger must be cleaned and problem corrected. Proceed as follows. Combustion Air Filter This unit has a standard air filter located at the combustion air inlet. This filter helps ensure clean air is used for the combustion process. Check this filter every month and replace when it becomes dirty.
Hydronic Heating Boilers and Domestic Water Heaters CLEANING AND MAINTENANCE Continued Adjusting Differential Air Pressure The following is a recommended method for setting the differential air pressure (P) for each fan. Set Up Procedure Beside each fan duct is an air pressure switch with a large and a small tube delivering pressure from points inside the unit (see FIG. 59). The pressure in the large tube is the chamber pressure. The pressure in the small tube is the burner pressure.
Installation and Service Manual 6. Adjust the air shutter on the right fan until the differential 6. Program each stage of the temperature control to the desired temperature set points. pressure is nominally 1.1-1.3 inches water column. 7. Once the adjustment procedure is complete, reattach the 7. Turn on gas supply. caps to the tees in the hoses to the pressure switches and check all tubing and wire connections for snug fit. Test fire 8. Press the module reset buttons (located on the front of the the unit.
Hydronic Heating Boilers and Domestic Water Heaters SEQUENCE OF OPERATION Continued ELECTRONIC TEMPERATURE CONTROLLER 24VAC CIRCUIT BREAKER A circuit breaker is provided for protection of the low voltage supply transformer from overloads and short circuits. The breaker is located inside the unit on the right rear of the control panel. Power from this breaker goes to the electronic temperature controller, ignition module and various other components and/or options on the unit.
Installation and Service Manual IGNITER POST-PURGE (Controlled by Ignition Module) (Ignition Module Function) When 24VAC is removed from the ignition module’s thermostat input, the module turns off the gas valves and maintains the blowers for approximately 25 seconds in order to allow the combustion chamber to be purged of all combustion by-products. One igniter per ignition module is provided in order to ignite the fuel/air mixture and its on/off operation is controlled by the ignition module.
Hydronic Heating Boilers and Domestic Water Heaters TROUBLESHOOTING GUIDE 399,999 - 750,000 Btu/hr Models Step 1 Does the power switch provide power to the unit? Check the switch for proper operation. Check the line voltage. NO Check all safety limit devices, all connectors behind the control panel and voltage from the transformer to B2. YES Step 2 Combustion air blower comes on. Is there 24VAC at B2 on the terminal strip? NO YES NO Check the flow switch and Tekmar pins #15 and #16 for 24VAC.
Installation and Service Manual TROUBLESHOOTING GUIDE 990,000 - 2,070,000 Btu/hr Models Does the power switch provide power to the control panel? Step 1 Check the switch and/or the line voltage. NO Exchange ignition module. Is there 24VAC at B2 on the terminal strip. YES Check all safety limit devices and voltage from the transformer to B2. NO NO Step 2 NO Does F2 on ignition module have 120VAC? YES Combustion air blowers come on. YES Check 24VAC at TH (orange wire) on ignition module(s).
CONTROL BOX CONNECTIONS 64 PR BR ELECTRONIC CONTROLLER 21 R/O IGN 1 12 IGN 1 11 10 P1 9 S1 8 S2 7 S2+ 6 S2- 5 ALR 4 RST1 3 +24 2 COM 1 DISPLAY BOARD 12 6 5 4 3 2 1 TANK SEN OA SEN TANK/OA COM HEAT DEM 2 HEAT DEM 1 HDCOM S2 IN PUMP PUMP 14 13 S3 IN S2 OUT 19 18 S1 OUT S1 IN n/a S3 OUT 16 15 n/a 22 21 20 17 24V ALARM 24 23 T=TAN Y=YELLOW BR=BROWN G=GREEN GY=GRAY R=RED R/BK BK W PR/BK BL/W BL Y PR Y P 3 3 2 2 P 1 1 3 6 CONNECTION - WIRING DIAGRAM A TH C CONNECTE
Installation and Service Manual LADDER DIAGRAM 399,999 - 750,000 BTU/HR MODELS 60Hz BK OPTIONAL ALARM INPUT 3 PR MAN. RESET AUX. HI-LIMIT O .C.
Hydronic Heating Boilers and Domestic Water Heaters WIRING BOX CONNECTIONS - WIRING DIAGRAM B 399,999 - 750,000 BTU/HR MODELS 66
Installation and Service Manual WIRING BOX CONNECTIONS - WIRING DIAGRAM B (CONTINUED) 399,999 - 750,000 BTU/HR MODELS 67
Hydronic Heating Boilers and Domestic Water Heaters LADDER DIAGRAM 990,000 - 2,070,000 BTU/HR MODELS LINE 60Hz BK ALARM INPUT 4 PR OPTIONAL TEST PROBE SWITCH O.C. J1 ~~~ ~~ ~~~~~~~ BL/ BK T 24 V AC C ON TROL T T CIRCUIT BREAKER BL BR 6 3 5 2 4 1 BL/BK RESET PR J2 2 3 1 P PR BL/BK BL GND LOW HIGH ALARM INPUT 1 INTERMITTENT ALARM ENABLE RELAY C HD#1 STAGE #1 PR/BK 1C 1NO N.O.
24 PR ELECTRONIC CONTROLLER BR BL /W BK W P R/O R/W GY /W GY/W Y P 2 3 P 1 1 PR/ BK PR/ PR/ BK BK SHRINK TUBING Y PR/ BL BK OPTIONAL Y 2 3 PR Y BL R/BK BK W PR/BK BL/W BL Y R P GY GY 2 1 LIMITS 5 4 T 6 5 6 2 3 Y BR T BR/ W Y BR 4 4 5 1 1 2 3 T/W T/W T TH1 E GY/ W 2 5 3 6 GY 4 1 G M/S FF BK W IGNITION MODULE #2 + - F1 F2 STG #3 STG #1 86 PR 3 Y 9 6 D BK W 3 1 R 7 4 1 LINE BL/ BK BK O/ B K Y 2 R/O 1 R/W 6 3 9 8 7 12
Hydronic Heating Boilers and Domestic Water Heaters WIRING BOX CONNECTIONS - WIRING DIAGRAM B CONNECTIONS 990,000 - 2,070,000 BTU/HR MODELS 70
Installation and Service Manual DIAGRAM B CONNECTIONS 990,000 - 2,070,000 BTU/ HR MODELS (CONTINUED) 71
Revision 6 (CF-CH(E)-i&s-06) reflects changes made to text on Page 33 and the LBLs on pages 64-65, 68-69. Revision 7 (ECO C02822) reflects moving FIG. 22A (page 20) to page 23 and adding Aire-Lock to the title. Revision 8 (ECO #C02870) reflects the addition of a mixing valve to FIG. 54 (page 53) and edits made to the scald warnings. Revision 9 ( ECO C06389) reflects the correction of “Boil Max” temperatures on page 44.
