CONDENSING TANKLESS COMBI BOILER Use and Care Manual User’s Information Installation Start-Up Maintenance Parts 100K Heating (180K DHW) Btu/h Models 120K Heating (199K DHW) Btu/h Models NOTE TO CONSUMER: DO NOT DESTROY THIS MANUAL. PLEASE READ CAREFULLY AND KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE. The surfaces of these products contacted by consumable water contain less than 0.25% lead by weight, as required by the Safe Drinking Water Act, Section 1417.
FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, personal injury or death. A.This appliance does not have a pilot. It is equipped If you cannot reach your gas supplier, call the automatically lights the with an ignition device which automatically lights the fire department. burner. Do not try to light the burner by hand. C. Use only your hand to turn the gas control knob. B.
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to important product information. The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. levels, or to important product information.
FOREWORD This manual is intended to be used in conjunction with other literature provided with the appliance. This includes all related control information. It is important that this manual, all other documents included with this system, and additional publications including the National Fuel Gas Code, ANSI Z223.1-Latest Edition, be reviewed in their entirety before beginning any work.
TABLE OF CONTENTS PART 1 – ITEMS SHIPPED WITH THE APPLIANCE............................................................................................7 PART 2 – SAFETY REGULATIONS.............................................................................................................................8 A. OPERATION AND INSTALLATION WARNINGS..................................................................................................8 B. IMPROPER COMBUSTION..........................................
PART 10 – OPERATING SYSTEM INSTRUCTIONS............................................................................................45 A. CONTROL PANEL..............................................................................................................................................45 B. LCD DISPLAY DESCRIPTIONS.........................................................................................................................46 C. START-UP SEQUENCE...........................................
PART 1 – ITEMS SHIPPED WITH THE APPLIANCE ITEM Combi Appliance DESCRIPTION QUANTITY 1 Use and Care Manual 1 CH Pressure Relief Valve (CH Line ¾" 30 psi) 1 Vent Screens (3") 2 Screens Outdoor Temperature Sensor 1 Emergency Kit 1 Anchors and Wall Mounting Bracket 1
ITEM DESCRIPTION Vent Screens (2" Mesh) PART NUMBER 2 Screens Table 1 – Items Included with the Appliance PART 2 –SAFETY REGULATIONS ▪ A. OPERATION AND INSTALLATION WARNINGS To save time and money, review the following initial diagnostic steps before calling for service. DANGER Vapors from flammable liquids will explode and can cause a fire, resulting in personal injury or death. The appliance has a burner that can come on at any time and ignite vapors.
WARNING After installation, all appliance safety devices should be tested. This appliance is certified for indoor installations only. The appliance consists of gas ignition system components which must be protected from water (dripping, spraying, etc.) during operation and service. Carefully consider installation location and the placement of critical components (circulators, condensate neutralizers, etc.) before installing the appliance. DO NOT allow children to operate this unit.
▪ E. WATER CHEMISTRY CAUTION Chemical imbalance of the water supply may affect efficiency and cause severe damage to the appliance and associated equipment. Water quality must be professionally analyzed to determine whether it is necessary to treat the water. Various solutions are available to adjust water quality. Adverse water quality will affect the reliability of the system.
PART 3 –TECHNICAL SPECIFICATIONS 120K Heating (199K DHW) Btu/hr 100K Heating (180K DHW) Btu/hr MAX 199,000 Btu/h (58.3 kW/h) 180,000 Btu/h (52.7 kW/h) MIN 18,000 Btu/h (5.2 kW/h) 18,000 Btu/h (5.2 kW/h) 35°F Rise 9.9 GPM (37.4 LPM) 9.0 GPM (34 LPM) 45°F Rise 7.7 GPM (29.1 LPM) 7.0 GPM (26.4 LPM) 77°F Rise 4.5 GPM (17 LPM) 4.1 GPM (15.5 LPM) MAX 120,000 Btu/h (35.1 kW/h) 100,000 Btu/h (29.3 kW/h) MIN 18,000 Btu/h (5.2 kW/h) 18,000 Btu/h (5.
ཁG GགG གྷG G ཆG ཇG ཅG ཊG ངG ཉG Figure 1 – Specifications and Dimensions ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ ⓙ Table 5 – Adapter Specifications DESCRIPTION Pressure Relief Valve for Heating Exhaust Vent Connection Intake Pipe Connection CH Supply Connection CH Return Connection DHW Outlet Connection DHW Inlet Connection Auto Feeder Inlet Connection Gas Connection Condensate Drain Connection DIAMETER (ALL NPTM) 3/4" 3" 3" 1" 1" 3/4" 3/4" 1/2" 3/4" 1/2"
2.
CAUTION Carefully consider installation when determining appliance location. Please read the entire manual before attempting installation. Failure to properly take factors such as appliance venting, piping, condensate removal, and wiring into account before installation could result in wasted time, money, and possible property damage and personal injury. ▪ B. BEFORE LOCATING THE APPLIANCE WARNING Incorrect ambient conditions can lead to damage to the heating system and put safe operation at risk.
WARNING Do not connect the appliance to any heating systems or components that have been previously used for non-potable applications. Do not introduce toxic chemicals, such as antifreeze or appliance treatments, into the appliance or any piping meant for potable water purposes. Ensure that all piping and components connected to the appliance are suitable for potable water applications. Do not use this appliance only for space heating applications.
▪ E. RESIDENTIAL GARAGE AND CLOSET INSTALLATIONS CAUTION Check with your local Authority Having Jurisdiction for requirements when installing appliance in a garage or closet. Please read the entire manual before attempting installation. Failure to properly take factors such as venting, piping, condensate removal, and wiring into account before installation could result in wasted time, money, and possible property damage and personal injury.
▪ H. PREVENT COMBUSTION AIR CONTAMINATION Install intake piping for the appliance as described in the Venting section. Do not terminate exhaust in locations that can allow contamination of intake air. WARNING Ensure that the intake air will not contain any of the contaminants below. For example, do not pipe intake near a swimming pool. Avoid areas subject to exhaust fumes from laundry facilities. These areas always contain contaminants.
When removing an existing heater, follow the steps below. 1. Seal any unused openings in the common venting system. 2. Visually inspect the venting system for proper size and horizontal pitch to determine if there is blockage, leakage, corrosion, or other deficiencies that could cause an unsafe condition. 3. If practical, close all building doors, windows, and doors between the space in which the water heater remains connected to the common venting system and other spaces in the building.
PART 5 –VENTING DANGER Vent this appliance in accordance with these instructions. Failure to do so will result in property damage, severe personal injury, or death. WARNING DO NOT mix vent systems or materials unless specifically told to do so in this manual. DO NOT thermally insulate the exhaust vent or intake pipes. DO NOT use an electric damper, vent damper, or draft hood with this appliance. DO NOT locate the exhaust vent or intake pipe terminations where exposed to prevailing winds.
• DO NOT vent near soffit vents, crawl space vents, or other areas where condensate or vapor could create a nuisance or hazard or cause property damage. • DO NOT vent where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valve, or other equipment. •M aximum Snow Level Determination: These installation instructions reference snow levels in establishing a minimum height for the installation of exhaust vent or air intake terminations.
Figure 6 – Vent Termination Detail A B DESCRIPTION Clearance above grade, veranda, porch, deck, or balcony Direct Vent Clearance to window or door that may be opened Power Vent US CANADA 1 foot (30 cm) 1 foot 4 feet below or to side of 36 in (91 cm) opening; 1 foot above opening * C Clearance to permanently closed window D Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet from the center line of the terminal * E F G Clearance to unventi
▪ B. APPROVED VENT MATERIALS NOTICE Consult Table 10 or the most recent edition of ANSI Z223.1/NFPA 54 or CAN/CSA B149.1 as well as all applicable local codes and regulations when selecting vent pipe materials.
a. The equivalent lengths of friction loss in elbows are listed below: • 5 feet (1.5M) for each additional 3" 90° elbow • 2.5 feet (.75M) for each additional 3" 45° elbow • 8 feet (2.4M) for each additional 2" 90° elbow • 4 feet (1.2M) for each additional 2" 45° elbow •S ome terminations are considered elbows, and deduction should be applied. For example, a turndown 90° or an open T termination should be considered a 90° elbow.
Figure 7 – Installing the 3" Pipe into the Exhaust Vent Connection NOTE: REDUCING VENT SIZE; TRANSITIONING FROM 3” TO 2” VENT PIPE MUST ALWAYS TAKE PLACE IN A VERTICAL POSITION TO PREVENT CONDENSATE BLOCKAGE Figure 8 – Transitioning from 3" to 2" Vent Pipe ▪ E. VENT TERMINATION 1.
2. Direct Vent, Optional Horizontal and Vertical Vent Kits Sidewall Venting with Kit Roof Venting Concentric Vent Kit Roof Venting Sidewall Venting with Kit Exhaust LEVEL OR 24” - WHICHEVER IS GREATER CONCENTRIC VENT KIT Air - inlet around Perimeter Exhaust 12” OVER MAXIMUM SNOW with Concentric Vent Kit Air Inlet NOTE: EXTEND VENT RUNS WHEN TRANSITIONING TO A LARGER DIAMETER MUST ALWAYS TAKE PLACE IN A VERTICAL POSITION EXHAUST Min.
4. Power Venting, Indoor Combustion Air Installation in Confined or Unconfined Space This heater requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate combustion and ventilating air. NOTE: To prevent combustion air contamination, see Table 8. Combustion air from the indoor space can be used if the space has adequate area or when air is provided through a duct or louver to supply sufficient combustion air based on the heater input.
INDOOR COMBUSTION AIR (SINGLE PIPE) _HORIZONTAL INDOOR COMBUSTION AIR (DIRECT VENT) _HORIZONTAL INSERT SCREEN IN EACH OPEN END OF TEE INSERT SCREEN IN OPEN END OF EACH ELBOW 1΄(30cm) 1΄(30cm) 3"Min (7.5cm) 3"Min (7.5cm) MAINTAIN 12"(30cm) MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE, WHICHEVER IS GREATER. MAINTAIN 12"(30cm) MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE, WHICHEVER IS GREATER.
PART 6 – INSTALL THE CONDENSATE DRAIN 1. Due to its efficient design, the appliance produces condensate (water) as a normal by-product. This condensate is acidic, with a pH level between 3 and 4. This condensate must be drained away from the appliance and disposed in accordance with all local regulations. 2. Use corrosion-resistant materials approved by the Authority Having Jurisdiction (AHJ) to drain condensate.
PART 7 – GAS PIPING WARNING FIRE AND/OR EXPLOSION HAZARD To avoid serious injury or death, the gas line installation and the gas line inlet pressure test must be done by a licensed professional. Always match the appliance with the type of gas supplied to the unit (natural gas or LP gas). This appliance must be converted into propane operation unless specifically manufactured for use with propane. Follow Gas Conversion Manual instructions (separate document).
▪ B. GAS CONNECTION REQUIREMENTS 1. The gas connection fitting on the appliance is 3/4" male NPT. NOTE: The pipe size must not be less than ½". 2. The supply line must be sized for the maximum output of the appliance being installed. If there are additional gas appliances from the main supply line, measure the size of the supply line according to the COMBINED total maximum BTUH draw for the appliances as if they were operating at the same time. 3.
Figure 16 – Natural Gas Piping Installation NOTE: Capacity to be Not Less than Total Capacity of Connected Appliances. Figure 17 – LP Gas Piping Installation NOTE: Capacity to be Not Less than Total Capacity of Connected Appliances.
PART 8 – WATER PIPING ▪ A. GENERAL PLUMBING CONNECTION GUIDELINES • Pipe material must be suitable to meet local codes and industry standards. • The pipe must be cleaned and without blemish before any connections are made. � � � •� AUTODESK Do�not apply a torch within 12" of the appliance. Doing so could damage the appliance. Such damages ARE NOT covered by product warranty. • The size of the hot water pipe should be ¾" diameter and the central heating water pipe should be 1" in diameter.
CAUTION Undersized expansion tanks cause system water to be lost from the relief valve, causing make-up water to be added. Eventual appliance failure can result due to excessive make-up water addition. SUCH FAILURE IS NOT COVERED BY WARRANTY. K��� ���� ��� 2. The expansion tank must be located following recognized design methods. See expansion tank manufacturer’s instructions for details. 3.
Wiring diagram for ExternalAUTODESK Options � � � ���� ��� Ref: Page 37 Ref: Page 36 AUTODESK � � � � � � � � � � Note: * 1 External Pump Terminal : ‘10:EP’ should be ‘on’ in Installer Mode to activate this terminal. * 2 Air Handler Terminal : ‘8:AH’ should be ‘on’ in Installer Mode to activate this terminal.
Primary / Secondary Piping with Zone Valves DHW Priority. AUTODESK � � � � � � � � � � 10:EP mode should to be ‘ON’ in Installer Mode to activate this terminal. NOTES: AUTODESK � � � � � � � � � � Figure 20 – CH and DHW Piping 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3.
Primary / Secondary Piping with Zone Pumps DHW Priority. (Outdoor Reset) AUTODESK � � � � � � � � � � AUTODESK � � � � � � � � � � Figure 21 – CH Piping – Zoning with Pumps NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3.
Air Handler Piping. AUTODESK � � � � � � � � � � AUTODESK � � � � � � � � � � AUTODESK � � � � � � � � � � Figure 22 – CH Piping with Air Handler NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. This Rheem Combi Boiler can control the operation of an Air Handler when a thermistor is used in combination with the Air Handler. 3.
▪ D. CH AND DHW PRESSURE RELIEF VALVES An external pressure relief valve must be installed on this appliance for both the CH and DHW loops. When installing, observe the following guidelines. Pressure relief valves must be installed as close to the appliance as possible. No other valves should be placed between the pressure relief valve and the appliance. Failure to comply with these guidelines can result in substantial property damage, personal injury, or death.
WARNING ELECTRICAL SHOCK HAZARD – To ensure safety, turn off electrical power supply at service entrance panel before making any electrical connections to avoid possible electric shock hazard. Failure to do so could result in property damage, serious personal injury, or death. ▪ A. GENERAL OPERATING CONDITIONS • Temperature - Operating Ambient Temperature Range: 14 ~ 140°F(-10 to 60°C) - Operating Relative Humidity: Up to 90% at 104°F (40°C) ▪ B. WIRING INFORMATION 1.
7 6 5 4 3 2 1 ON Figure 24 – Dip Switch Detail 1–3 4 5 6 7 Table 15 – Dip Switch Detail DIP SWITCH Factory Use Only Factory Use Only Gas Type High Fire Low Fire MAXIMUM FLAME DETECTING VOLTAGE PRE-PURGE TIME (Tp) SAFETY TIME (IGNITING TIME) (Ts) IGNITING INTERVAL TIME POST-PURGE TIME (Tip) OVER-HEATING PROTECTION DETECTION TIME Table 16 – System Control Settings OFF LP Normal Normal Factory Use Only Factory Use Only ON NG High Fire Low Fire 2.
Figure 25 – Electrical Wiring Diagram 4 3 Control Panel (P-960C) 12 R BK R 11 6 BK 5 9 8 BL BL 3 1 2 3 4 5 6 7 R W 2 (T-T) Heat CN15 AGM /Y Phase AGM Y Phase AGM /X Phase AGM X Phase GND AGM Position Sensor DC 24V High Limit Switch 1 7 CN20 CN17 Low Air Water Cut Off CN22 Burner Limit Switch External AC 24V Output Max 0.5 Amp AC 24V Input External Pump Output Max 2.
Figure 26 – Ladder Diagram
CN18 CN No. Pin No.
CN No. Pin No.
AUTODESK � � � � � � � � � � Heat Demand (0-10V) Connection AUTODESK � � � � � � � � � � Figure 27 – Terminal Block Wiring Detail Outdoor Temperature Sensor AUTODESK � � � � � � � � � � AUTODESK � � � � � � � � � � Outdoor Temperature Sensor Connection PART 10 – OPERATING SYSTEM INSTRUCTIONS ▪ A.
▪ B.
AUTODESK � � � � � � � � � � [ Example ] Heating Temperature Setting: 180°F AUTODESK � � � � � � � � � � AUTODESK � � � � � � � � � � CURRENT TIME : AM 1:39 CURRENT DAY : MONDAY DHW Preheat is scheduled to run Monday 5:00am~6:30am and 6:00pm~8:00pm AUTODESK � � � � � � � � � � Figure 30 – Initial Display Screen Example NOTE: The initial display screen will differ depending on a number of factors, including whether the appliance detects a call for heat or hot water.
DANGER Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperature over 125°F can instantly cause severe burns, or death, from scalds. Children, disabled, and elderly are at the highest risk of being scalded. See instruction manual before setting temperature at appliance. Feel water before bathing or showering! ▪ E.
▪ G. STATUS DISPLAY MODE (or USER MODE) Status Display Mode will activate when is pressed and held for 5 seconds when the display panel is turned on at Standby Mode. Figure 34 – Status Mode Screen Parameter A: GA/L b:FM C:TL d:TP E:WP F:FS g:EH H:RH (Running History) I:MD J:GT K:Pr Detail DHW Flow Rate Fan Speed Lock Mode H.SUP H.rEt d.Hot d.CLd Eht Od Heating Water Pressure Voltage of Flame Sensor Error History PLUg bnH.H bnH.d bnC.H bnC.
▪ I. INSTALLER MODE How To Enter “Installer Mode" 1. Turn off the power to the Control Panel. 2. Press and hold the button for more than 5 seconds to get into the ‘Installer Mode’. 3. Turn the clockwise or counterclockwise to search to the desired selection in the ‘Installer Mode’. 4. Press to save setting value.
Primary Show Parameter Index Step 1 A.HI 4:Od (This parameter doesn’t show if 2:TR is Off) 6:Vt 7:EL 8:AH Default O 70°F (21°C) 23~110°F (-5~43°C) - on - O oFF - - -4~61°F (-20~16°C) - O 20°F (-6.5°C) b.noH Outdoor Temp C.
Primary Show Parameter Index 9:PH Step 1 Secondary Show Step 2 Step 3 Default oFF - - O on - - - oFF - - O on - - - Pre-Heating 10:EP External Pump 11:WP Water Pressure 12~26 PSI - - - 12:IV Interval 0~20 min - - 3 min HEAt 0~60 min - 20 min Do.H 1~20 min - 3 min A.oFF 0~30°F (0~16.5°C) - 10°F (5.5°C) b.on 1~30°F (0.5~16.5°C) - 30°F (16.5°C) 13:Or 14:bt Pump Overrun Time Burner Set Temp A.FH2 b.FH1 C.
▪ J. ERROR MODE The following screen will display when the appliance encounters an error. Figure 37 – Error Mode Screen Code Er11 Er12 Er16 Er20 Er29 Er30 Er31 Er32 Er33 Er34 Er35 Er38 Er39 Er40 Er41 Er43 Er45 Er54 Error Code Description Possible Remedies • Make sure that the main gas supply valve is open. Ignition Failure • Make sure that the gas supply and inlet gas is within specification. • Clean the intake air filter.
Code Error Code Description Er55 Stop Supply Inlet Water. Er56 High Heating Water Pressure Er58 LWCO Abnormality Er59 Pressure Sensor Abnormality Er61 RPM Sensor Er63 Overheating Heating SupplyThermistor during HeatingOperation (Exceed 205°F(96°C)) Er65 Flow Control ValveAbnormality Er67 AGM Abnormality Er72 Flame Detected before IgniteAbnormality Er73 DIP Switch Setting Abnormality Er76 Communication Error betweenControl Panel and CircuitBoard.
▪ K. OUTDOOR TEMPERATURE MODE NOTE: If the system requires a fixed operating temperature, the outdoor sensor is not required and should not be installed. There is no connection required if an outdoor sensor is not used in the installation. 1. Use a minimum 18 AWG wire for runs of up to 150 feet. 2. Mount the outdoor sensor on an exterior surface of the building, preferably on the north side in an area that will not be affected by direct sunlight and will be exposed to varying weather conditions.
0-10 V INPUT TABLE: When outside voltage is applied to the connector (2) in the wiring diagram, 1. The Outdoor temperature sensor does not work. 2. Symbol is displayed. 3. The heating temperature is automatically set according with the external voltage input. NOTE: 0~10V is prioritized. If input voltage is less than 1.5V then T/T will operate. The range of input voltage is approximately 1.5[V] ~ 10[V] and the heating temperature settings according to this range are as follows.
Clean system to remove sediment* 1. You must thoroughly flush the system (without the appliance connected) to remove sediment. The high-efficiency heat exchanger can be damaged by buildup or corrosion due to sediment. 2. For zoned systems, flush each zone separately through a purge valve. (If purge valves and isolation valves are not already installed, install them to properly clean the system.) 3. Flush system until water runs clean and you are sure piping is free of sediment.
WARNING FOR YOUR OWN SAFETY READ BEFORE OPERATING 1. This appliance does not have pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. 2. BEFORE OPERATING: smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS ㆍDo not try to light any appliance.
To purge air from the system: a. Connect a hose to the purge valve and route hose to an area where water can drain and be seen. b. Close the appliance or system isolation valve between the purge valve and fill connection to the system. c. Close zone isolation valves. d. Automatic water replenishment in progress when the Combi Boiler is less than the internal pressure 12psi. e. Open purge valve. f. Open the isolation valves one zone at a time. Allow water to run through the zone, pushing out the air.
▪ H. CONDENSATE REMOVAL 1. This is a high efficiency condensing appliance. Therefore, the appliance has a condensate drain. Condensate fluid is nothing more than water derived from combustion products, similar to that produced by an automobile when it is initially started. Condensate is slightly acidic (typically with a pH of 3 to 5) and must be piped with the correct materials. Never pipe the condensate using steel, copper, brass or other materials that will be subject to corrosion.
LP GAS NATURAL GAS Minimum Pressure 8.0" WC Minimum Pressure 3.5" WC Maximum Pressure 14.0" WC Maximum Pressure 10.5" WC Table 25 – Gas Pressure Requirements 6. Remove the manometer. Close the screw on the gas inlet pressure tap. ▪ K. SETTING AND VERIFYING THE COMBUSTION SETTING 1. After the appliance has fired, flip DIP switch seven (7) to the ON position (low fire). Proceed to check appliance combustion values.
PART 12 – INSTALLATION AND START-UP CHECKLIST LIGHT OFF ACTIVITIES 1) Fill the Heating System with Water 2) Exhaust Vent and Intake Piping 3) Condensate Piping / Tubing and Components 4) Gas Piping 5) Pressure Relief Valves 6) Wire the Appliance 7) Start-Up, Adjust, and Test Has the system been cleaned and flushed? Does water chemistry meet requirements? If water chemistry does not meet requirements, are treatment measures put in place? Check all water piping and connections.
Figure 41 – Flame Sight Glass CH Return Temperature Sensor Exhaust Temperature Sensor Temperature (◦F) Resistance (Ω) -4 62162 5 48440 14 38045 23 30107 32 23998 41 19261 50 15562 59 12655 68 10353 77 8520 86 7051 95 5867 104 4908 113 4125 122 3485 131 2957 140 2520 149 2157 158 1854 167 1600 176 1386 185 1205 194 1051 203 920 212 808 Table 28 – Temperature Sensor Resistance CH Supply Temperature Sensor DHW Temperature Sensor Temperature (◦F) Resistance (Ω) -4 28409 5 22152 14 17408 23 13782 32 10990 4
PART 13 – TROUBLESHOOTING TROUBLESHOOTING CHART PROBLEM POSSIBLE CAUSES 1. Is the plug on the power supply cord unplugged from the electrical outlet? 2. Is electrical panel’s 10 Amp circuit breaker tripped? 3. Is the fuse on the circuit board good? 4. Is there a power outage to the home? 1. Is the water supply valve shut off at the meter (do cold water faucets work)? 2. Is the water supply valve near the unit open? 3. Is the water pipe frozen? 4.
Display Nothing appears on the display control panel, but the appliance is operating Display repeatedly goes through initialization sequence Condition Diagnostic Check for loose connections and proper pin alignOccurs when communicament / engagement on the control’s plug tions is lost from the control Cycle power off and on using appliance power to the display switch and check for operation Occurs when control does Cycle power off and on using appliance power not receive signal from fan switch and chec
Cleaning the Air Intake Filter The air intake filter should be cleaned once a month. If not, the combi boiler could encounter combustion problems. To clean the air intake filter: 1. Press the Power button on the control panel to turn off the combi boiler. 2. Disconnect the power supply from the combi boiler. 3. If water heater has been operating, wait for it to cool before continuing. 4. Remove the front cover of the combi boiler cabinet. 5. Pull the filter out of the air intake adapter. 6.
ㆍ Read the temperature and pressure gauge to ensure the system is pressurized. Minimum is 10 psi. Maximum is 25 psi. Lift the relief valve top lever slightly, allowing water to relieve through the valve and discharge piping. ㆍ If water flows freely, release the lever and allow the valve to seat. Watch the end of the relief valve discharge pipe to ensure that the valve does not weep after the line has had time to drain. If the valve weeps, lift the lever again to attempt to clean the valve seat.
Cleaning the CH and DHW Inlet Filters (Draining the Appliance) 68 1. Place a bucket under the appliance to collect the residual water inside the appliance. 2. Press the Power button on the control panel to turn off the electrical power to the appliance. Then turn off the gas valve. 3. Valve off the appliance from the system. If the appliance cannot be isolated from the system, turn off the main water valve. 4. Open the hot water faucets in the system to aid in draining the system.
PART I _ CASE PART Figure 46 – CASE PART 69
Item Description Part Number Qty Item Description Part Number Qty 1 Gas Inlet Connection RTG20298A 1 27 PCB (Control Board) RTG20316U 1 2 Water Inlet Valve Assy RTG20298B 1 28 Rocker Switch RTG20298AV 1 2-1 Cold Water Temperature Sensor RTG20298C 1 29 Control Board Bracket RTG20316BE 1 2-2 Cold Water Filter Cap RTG20298D 1 30 Case (Top) RTG20316C 1 2-3 Cold Water Filter RTG20316BU 1 Case (Bottom) RTG20316B 1 2-4 O-ring (P20) RTG20298F 1 31 2-5 O-ring (
PART II _ HEAT EXCHANGER PART Figure 47 – Heat Exhchanger Part 71
Item 1 2 3 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 4 5 6 7 8 9 10 11 12 Description Blower Connector Blower Connector Packing Burner Assembly Burner Head Burner Flange Ignition Rod Ignition Rod Gasket Overheat Switch (Burner) Burner head packing Burner head gasket 1 Burner head gasket 2 Exhaust Pipe Assembly (Lower) Exhaust Pipe Assembly (Upper) Exhaust Temperature Sensor Exhaust Duct Packing Flame Detector Sensor Bracket Flame Detector Sensor Flame Detector Metal Plate Flame Observation Bracket Flame Observa
PART III _ FAN MOTOR PART Figure 48 – Fan Motor Part 73
Item Description Part Number Qty Item 2-3 3 4 5 6 7 8 9 10 11 Gas Valve Adapter (Straight) 15A Packing (Non-asbestos) 15A Packing Gas Mixer Packing Gas Valve Bracket Silencer Body Silencer Elbow Gas Pipe (Upper) Gas Pipe (Lower) O-ring (P18) Item L M N O P Q R S T U V Description Truss Head Machine Screw Round Head Tapping Screw Truss Head Machine Screw Hexagon Head with Flange Machine Screw Truss Head Machine Screw Round Head Tapping Screw Binding Head Tapping Screw Round Head Tapping Screw Roun
START-UP REPORT LIGHT OFF ACTIVITIES 1) Fill the heating system 2) Electrical 3) Check gas pipe 4) Venting 5) Condensate piping / tubing FINAL DATE COMPLETED ________________ Yes No Check all piping and gas connections, verify all are tight Has the system been cleaned and flushed? Has the appliance and the system been purged of all air? Refer to Start-Up Preparation, this manual. Has the auto air purge feature been used / set? Refer to Start-Up Preparation, this manual.
MAINTENANCE REPORT In unusually dirty or dusty conditions, care must be taken to keep appliance cabinet door in place at all times. Failure to do so VOIDS WARRANTY! The appliance requires minimal periodic maintenance under normal conditions. However, in unusually dirty or dusty conditions, periodic vacuuming of the cover to maintain visibility of the display and indicators is recommended.
MAINTENANCE NOTES AP18733 REV. 3.2.
CUSTOMER INSTALLATION RECORD FORM The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty claim. After reading the important notes at the bottom of the page, please also sign this document.
