CONDENSING TANKLESS WATER HEATER Use and Care Manual User’s Information Installation Start-Up Maintenance Parts 180,000 / 199,000 Btu/Hr 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.
SPECIAL ATTENTION BOXES 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. DANGER DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
WARNING California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer birth defects, or other reproductive harm. ▪ FOREWORD This manual is intended to be used in conjunction with other literature provided with the water heater. 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.
TABLE OF CONTENTS USER’S INFORMATION..........................................................................................................................................................7 A. PRODUCT AND SAFETY INFORMATION......................................................................................................................7 1. BEFORE OPERATION.................................................................................................................................................
H. REMOVING A WATER HEATER FROM A COMMON VENT SYSTEM..........................................................................25 I. UNPACKING THE WATER HEATER..............................................................................................................................25 J. WALL-MOUNTING THE WATER HEATER....................................................................................................................26 VENTING...............................................................
OPERATING SYSTEM INSTRUCTIONS...............................................................................................................................57 A. CONTROL PANEL............................................................................................................................................................57 B. LCD DISPLAY DESCRIPTIONS........................................................................................................................................57 C.
USER'S INFORMATION ▪ A. PRODUCT AND SAFETY INFORMATION WARNING USER – Have this water heater serviced/inspected by a qualified service technician annually. FAILURE TO ADHERE TO THE GUIDELINES IN THIS MANUAL CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE PERSONAL INJURY, OR DEATH. WARNING OPERATING INSTRUCTIONS 1. STOP! DO NOT use this water heater unless it is completely filled with water. 2. Ensure electrical power to the water heater is turned OFF. 3.
▪ 1. BEFORE OPERATION 1. Check the Gas Type (NG/LP) When operating the water heater for the first time, ensure the connected gas type matches that of the gas type of the water heater. Check whether the gas supplied is NG or LP. The water heater gas type is indicated on the rating plate on the side of the water heater. 2. Check the Power (120V 60Hz) Ensure the water heater is connected to a properly rated power supply. 3.
WARNING Exhaust gas entering the living space can cause carbon monoxide poisoning. If exhaust gas should leak into the living space: • Shut down the water heater. • Close the gas valve. • Open windows for ventilation. Immediately call a qualified service technician to inspect the water heater and exhaust vent pipe. Any damages to the exhaust vent pipe should be repaired immediately. Failure to do so could result in substantial property damage, severe personal injury, or death. 3.
▪ B. MAINTENANCE 1. SERVICE TECHNICIAN The following maintenance should be performed by a qualified service technician annually: General • Attend to any reported problems. • Inspect the interior of the water heater cabinet; clean and vacuum if necessary. • Clean the condensate trap and fill with fresh water. • If applicable, check the condensate neutralizer and ensure it is full of condensate neutralizing marble chips. • Check for leaks: Water, gas, flue and condensate.
Ensure the Water heater Cabinet is Closed Ensure the water heater cabinet is closed. Tighten the two upper and lower screws to secure it. The cabinet must be closed while the water heater is running. Check the Power Source Make sure the power cord is properly connected. The main power line is connected to the manual switch box inside the water heater. Check the Status of the Control Panel Observe the Control Panel to ensure the water heater is powered on, and to check for any error codes.
3. 6 MONTH MAINTENANCE Check Primary and Gas Piping • Remove the water heater cover and perform a gas leak inspection following Operating Instructions, page 2, this manual. If gas odor or leak is detected, follow procedures on page 2. Call a qualified service technician. • Visually inspect for leaks around the internal water heater water connections and around the heat exchanger. Visually inspect the external system piping, circulators, and system components and fittings.
▪ D. TROUBLESHOOTING To save time and money, review the following initial diagnostic steps before calling for service. Problem Possible Solution Make sure that the ON/OFF button on the Control Panel is ON If the display on the Control Panel is blank, make sure the power cord is plugged in and 3A fuses on the main controller in the water heater are good Burner Does Not Ignite Make sure that the water heater is supplied with water. The unit activates when inlet water flow sensor detects flow over 0.
THE FOLLOWING ARE INSTALLATION INSTRUCTIONS FOR THE CONTRACTOR AP18733 REV. 3.2.
ITEM DESCRIPTION Tankless Water Heater QUANTITY 1 1 CONDENSING TANKLESS WATER HEATER Use and Care Manual User’s Information Installation Start-Up Maintenance Parts Use and Care Manual 180,000 / 199,000 Btu/Hr 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.
Do not power up the unit unless the gas and water supply valves are fully opened. Make sure the fresh air intake port and exhaust gas port are open and functional. No one but a professional service technician should attempt to install, service, or repair this water heater. There are no serviceable parts which can be changed by the user / owner. User / Owner: Contact the original professional service technician if the water heater needs repair or maintenance.
▪ D. WHEN SERVICING THE WATER HEATER • To avoid electric shock, disconnect electrical supply before performing maintenance. • To avoid severe burns, allow water heater to cool. • Do not use petroleum-based cleaning or sealing compounds in a water heater system. Gaskets and seals in the system may be damaged, possibly resulting in substantial property damage. • Do not use “homemade cures” or “patent medicines”.
▪ G.
SPECIFICATIONS ▪ A. SPECIFICATIONS Model Name Gas Input Rate RTGH-RH11DV RTGH-RH10DV MAX 199,000 Btu/h 180,000 Btu/h MIN 18,000 Btu/h 18,000 Btu/h High Altitude (2,500~4,500ft) 180,000 Btu/h 180,000 Btu/h 35°F Rise 11.0 Gal 9.9 Gal 45°F Rise 8.5 Gal 7.7 Gal 77°F Rise 5.0 Gal 4.
▪ B.
11.5" [292mm] 4.6" [117mm] 2.6" [67mm] 3.2" [81mm] 6.8" [173mm] 10.2" [260mm] 13.6" [346mm] 28.7" [728mm] 6.1" [156mm] 5.4" [136mm] 2.4" [60mm] 4.0" [101mm] ▪ C. DIMENSIONS Figure 2 – Specifications and Dimensions DESCRIPTION DIAMETER A Exhaust Outlet Pipe 3" (7.6 cm) B Air Intake 3" (7.6 cm) C DHW Outlet Adapter ¾" (1.9 cm) D Condensate Adapter ½" (1.2 cm) E Recirculation Return ¾" (1.9 cm) F DHW Inlet Adapter ¾" (1.9 cm) G Gas Inlet ¾" (1.
PREPARE WATER HEATER LOCATION IMPORTANT Carefully consider installation when determining water heater location. Please read the entire manual before attempting installation. Failure to properly take factors such as water heater venting, piping, condensate removal, and wiring into account before installation could result in wasted time, money, and possible property damage and personal injury. ▪ A.
5. If the water heater is to replace an existing water heater, check for and correct any existing system problems, such as: • System leaks • Location that could cause the system and water heater to freeze and leak. • Incorrectly-sized expansion tank IMPORTANT Do not connect the water heater to any heating systems or components that have been previously used for non-potable applications.
PRECAUTIONS If the water heater is located in a residential garage, it should be installed per the latest edition of the National Fuel Gas Code, ANSI Z223.1, and CGA-B149 Installation Code in Canada. • Mount the bottom of the water heater a minimum of 18" (457 mm) above the floor of the garage, to ensure the burner and ignition devices are well off the floor. • Locate or protect the water heater so it cannot be damaged by a moving vehicle.
PRODUCTS TO AVOID AREAS LIKELY TO HAVE CONTAMINANTS Spray cans containing fluorocarbons Dry cleaning/laundry areas and establishments Permanent wave solutions Swimming pools Chlorinated waxes/cleaners Metal fabrication plants Chlorine-based swimming pool chemicals Beauty shops Calcium chloride used for thawing Refrigeration repair shops Sodium chloride used for water softening Photo processing plants Refrigerant leaks Auto body shops Paint or varnish removers Plastic manufacturing plants
IMPORTANT Cold weather handling – If water heater has been stored in a very cold location (below 0°F) before installation, handle with care until the plastic components come to room temperature. Remove all sides of the shipping crate to allow the water heater to be lifted into its installation location. ▪ J. WALL-MOUNTING THE WATER HEATER WARNING The water heater must be installed on a wall that can bear its weight (more than 88 lbs. [40 kg] when fully plumbed and full of water).
VENTING DANGER Vent this water heater 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 water heater. DO NOT locate the exhaust vent or intake pipe terminations where exposed to prevailing winds.
WARNING All joints of positive pressure vent systems must be sealed completely to prevent leakage of flue products into living space. • Remove all burrs and debris from joints and fittings. • When using PVC or CPVC pipe, all joints must be properly cleaned, primed, and cemented. Use only cement and primer approved for use with the pipe material. Cement must conform to ASTM D2564 for PVC and ASTM F493 for CPVC pipe. NOTE: DO NOT CEMENT POLYPROPYLENE PIPE.
Figure 6 - Vent Termination Detail A B Description US Canadian Clearance above grade, veranda, porch, deck, or balcony 1 foot (30 cm) 1 foot (30 cm) Clearance to window or door that may be opened Direct Vent 1 foot (30 cm) Power Vent 1 foot (30 cm) above, or 4 feet (1.
▪ B. APPROVED VENT MATERIALS WARNING Consult Table 11 or the most recent edition of ANSI Z223.1/NFPA 54 or CAN/CGA B149.1 as well as all applicable local codes and regulations when selecting vent pipe materials.
▪ C. Allowed Schedule 40 Vent Length (PVC, CPVC, PP) 1. Maximum Vent Length (Intake/outlet) Number of 90º elbows Maximum length of 2" straight pipe Maximum length of 3" straight pipe 0 or 1 50ft.(15.24m) 100ft. (30m) 2 42ft. (12.8m) 95ft. (29m) 3 34ft. (10.4m) 90ft. (27.4m) 4 26ft. (7.9m) 85ft. (25.9m) 5 18ft. (5.4m) 80ft. (24.4m) 6 Not Available 75ft. (22.9m) A. 3 inch diameter 90º elbow is equivalent to 5ft. (1.5m) of straight pipe. A.
Figure 8 – Transitioning from 3" (7.6 cm) to 2" (5.1 cm) Vent Pipe WARNING Do not use bushing to reduce vent size. Doing so could result in product damage, severe personal injury, or death. ▪ E. VENT TERMINATION 1. Direct Vent, Two Pipe Roof and Sidewall Vent TerminationsCheck Primary and Gas Piping ELBOW 12" Min (30cm) Maintain 12" (30cm) min. Clearance above highest anticipated snow level.
*Stating tee fitting requires a screen at both ends. Figure 10 – Direct Vent, Vent Terminations (With Optional Kits) WARNING All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼" (0.6 cm) per foot back to the appliance to allow drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot (30 cm) of the appliance and the balance at 4 foot (1.22 m) intervals on the vent pipe.
4. Power Venting, Indoor Combustion Air Installation in Confined or Unconfined Space NOTE: This water heater should be installed using direct venting in any instance where there are or may be flammable vapors in the area. FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. To do so may result in an explosion or fire.
INDOOR COMBUSTION AIR (SINGLE PIPE) _HORIZIONTAL INSERT SCREEN IN EACH OPEN END OF TEE 1΄(30cm) 3"Min (7.5cm) MAINTAIN 12"(30cm) MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE, WHICHEVER IS GREATER. INDOOR COMBUSTION AIR (SINGLE PIPE)_Vertical INSERT SCREEN IN EACH OPEN END OF TEE ROOF FLASHING Figure 13 – NOTE: These drawings are meant to demonstrate system venting only. The installer is responsible for all equipment and detailing required by local codes. AP18733 REV. 3.2.
▪ F. COMMON VENT PIPING DANGER Common Vented water heaters must be direct vented, with an exhaust vent and intake air pipe vented to the outdoors. DO NOT power vent Common Vented water heaters! Doing so will result in property damage, severe personal injury, or death. These water heaters can be common vented. Connecting several water heaters together requires proper sizing of the intake and exhaust pipes. Up to eighteen water heaters can be connected (cascading) together. 1.
2. RECOMMENDED EXHAUST PIPE TRANSITIONS Figure 14 – Recommended Exhaust Pipe Transitions AP18733 REV. 3.2.
3. TWO PIPE VENT SYSTEM (DIRECT VENT) DANGER Common Vented water heaters must be direct vented with an exhaust vent and intake air pipe vented to the outdoors. DO NOT power vent Common Vented water heaters! Doing so will result in property damage, severe personal injury, or death. The water heater can be direct vented without any modification using a 3 inch diameter pipe. The following diagrams represent some typical direct venting configurations and are included to assist in designing the vent system.
Figure 16 –Common Vented Direct Vent Configurations WARNING All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼" per foot back to the appliance to allow drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot of the appliance and the balance at 4 foot intervals on the vent pipe. Appliance venting must be readily accessible for visual inspection for the first three feet from the appliance.
INSTALL THE CONDENSATE DRAIN DANGER Common Vented water heaters must be direct vented, with an exhaust vent and intake air pipe vented to the outdoors. DO NOT power vent Common Vented water heaters! Doing so will result in property damage, severe personal injury, or death. NOTE: This drawing is meant only to demonstrate system venting. The installer is responsible for all equipment and detailing required by local codes.
Pipe size ½" (1.2 cm) ¾" (1.9 cm) 1" (2.5 cm) 1 ¼" (3.1 cm) 1 ½" (3.8 cm) 2" (5 cm) 2 ½" (6.35 cm) 3" (7.6 cm) 4" (10.1 cm) Maximum Natural Gas Delivery Capacity – Length of Black Iron Pipe (Sch. 40 Metallic) in Feet Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC [0.
▪ B. GAS CONNECTION REQUIREMENTS 1. The gas connection fitting on the water heater is ¾″ (1.9 cm) female NPT. NOTE: The pipe size must not be less than ¾″ (1.9 cm). 2. The supply line must be sized for the maximum output of the water heater 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.
Full size gas pipe Manual shut off valve Other appliance 1/2" pipe Sediment Trap Gas Regulator (supply press 12") Gas Regulator (2 psi) LP GAS TANK Figure 20 – LP Gas Piping Installation – NOTE: Capacity to be Not Less than Total Capacity of Connected Appliances ▪ C. ADDITIONAL PRECAUTION FOR EXCESS FLOW VALVE (EFV) If an excess flow valve (EFV) is in the gas line, check the manufacturer’s minimum and maximum flow capacity ratings.
If the readings obtained are lower or higher than the combustion readings in Table 19, use a 5m Allen key to adjust the offset screw in a clockwise (positive) or counterclockwise (negative) direction (approximately 1/4 turn). See Figure 23. Check your combustion values. Repeat this procedure until the values obtained on the combustion analyzer agree with those stated in Table 18.
Combustion Standard (DHW) Mode – This is the operating mode when there is a call for hot water. External Recirculation Mode – This mode keeps an external recirculation loop warm to make hot water production more efficient and also aid in freeze protection. An external recirculation line must be installed in order to recirculate water externally. The installer may program specific recirculation functions by day and time to circulate and heat water when the user most needs hot water.
▪ B. INSTALL A BACKFLOW PREVENTER It may be recommended to use a back flow preventer – check local codes. If a back flow preventer or a no return valve is used, a thermal expansion tank must be installed on the cold water supply between the water heater and valve. WARNING To control thermal expansion, a thermal expansion tank should be installed in systems with an installed backflow preventer. DO NOT use a closed type expansion tank.
Standard Mode Air & Gas Mixing 1. Only POTABLE water may be plumbed through the water heater. 2. The water heater cannot be used for space heating applications. 3. Expansion tank is required if a backflow preventer is installed. 4. Isolation valve kits are recommended for this installation.
Preheat or Internal Recirculation Mode Air & Gas Mixing Preheat or Internal Recirculation Mode may be used without an installed recirculation pipe. The water heater is preheated and protected from freezing.
Figure 29 – Pressure Drop through the Heat Exchanger RECOMMENDED WATER PIPE SIZE ∆T = 77°F (25°C) Number of units ∆T = 45°F (7.2°C) Flow Rate (GPM) Water Velocity (ft/s) Pipe Dia. (in) 1 5 3.75 3/4 9 2 10 4.22 1 18 ∆T = 35°F (1.6°C) Pipe Dia. (in) Flow Rate (GPM) Water Velocity (ft/s) Pipe Dia. (in) 3.61 1 11 4.64 1 3.21 1 1/2 23 4.
Pressure relief valves must be installed as close to the water heater as possible. No other valves should be placed between the pressure relief valve and the appliance. DO NOT install a relief valve with a pressure rating greater than 150 psi (1,034 kPa). This is the maximum allowable relief valve setting for this water heater. After installing the relief valve and filling and pressurizing the system, test the operation of the valve by lifting the lever. Make sure the valve discharges freely.
Figure 31 – Proper Grounding – Internal Manual Power Switch 6. The wiring diagrams contained in this manual are to be used for reference purposes only. 7. Refer to these diagrams and the wiring diagrams of any external controls used with the installation when wiring the water heater. Read, understand, and follow all wiring instructions supplied with the controls. 8. Do not disconnect the power supply when the water heater is in normal operation.
CN9 CN11 CN10 CN8 CN12 CN14 CN1 CN3 CN7 CN5 CN4 AP18733 REV. 3.2.
AP18733 REV. 3.2.
CONNECTOR NO.
CONNECTOR NO. OF LOCATION PIN 1 8 2 9 3 10 CN7 LWD1140-14 4 11 5 12 6 13 7 14 BOARD SILK F.S Flame Detect Sensor OP.S Operating Water Temperature Sensor DH.S DHW Temperature Sensor I.S Inlet Water Temperature Sensor BG.S Exhaust Temperature Sensor OT.S Optional Temperature sensor SP.
CONNECTOR NO. OF LOCATION PIN 1 2 CN3 SMW250-06 BOARD SILK OPB Optional Push Button 3 Unused 4 VCC 5 FLUX1 6 CN5 SMW250-10 DESCRIPTION 1 2 SELV(5V) Water Flow Sensor GND RPM HT SELV SELV (5V) Fan RPM Check GND Table 23 – Water Heater Wiring 2 AP18733 REV. 3.2.
▪ OPERATING SYSTEM INSTRUCTIONS A. CONTROL PANEL Press This Button Less than 5 Seconds Cancel/Return Hold This Button More than 5 Seconds When Control Panel Power is ON status Display Mdoe When Control Panel Power is OFF Installer Mode Press this Button Less than 5 Seconds Change DHW set-Point Temperature 100-120°F (38-49°C) Hold this Button More than 5 Seconds Change DHW Set-Point Temperature 121-140°F (49.
DESIRED HOT WATER TEMPERATURE : 120°F CURRENT TIME : AM 1:39 CURRENT DAY : MONDAY TIMER SETTING : MONDAY 5:00~6:30 , 18:00~20:00 Figure 34 – Example Display ▪ C. START-UP SEQUENCE After the appliance is powered ON, the LCD display shows a sequence of information. The icons will flash, followed by various indicators that describe the appliance controller and software versions. It will take the appliance roughly 15 seconds to cycle through the Start-Up Sequence.
Figure 35 – DHW Set-Point Screens Press the button when the display panel is powered ON to change the DHW Set-Point. The DHW icon and current set-point will display and flash. This indicates that the DHW Set-Point can be changed. Factory DHW Set-Point is 120°F(49°C). Initial DHW Set-Point range is 100 – 140°F (38 – 60°C). The recommended starting temperature is 120 °F (49°C). Turn the dial counterclockwise to lower and clockwise to raise the DHW set-point.
Parameter Detail Description A:Li or GA Flow Unit Current Flow Unit (Li: Liters/min, GA: Gallons/min) b:Fr Fan Speed (RPM) Current Fan Speed RPM Value C:Lc Lock Mode Lock Mode is In Use (ON) or Unused (OFF) Allows user to lock out any temperature change.
▪ G. INSTALLER MODE Installer Mode will activate when button is pressed and held for five seconds while the water heater display is powered Off.
Index Default Parameter Description 12:Cn oFF Cascade Enables Cascade Mode on the water heater. Range: on – Cascade is used, oFF – Cascade is not used 13:Eh on Common Vent NOTE: 12:Cn must be set to On to select 13:Eh Enables Common Venting on the water heater. Range: on – Common Venting is used, oFF – Common Venting is not used 14:T1 oFF Test Mode 1 Used to test the water heater when operating in Internal Recirculation Mode only.
4. Next, turn the dial to 7:RM. Press the Dial button. “ItnL” will flash when the 7:RM setting is ready to be changed. 5. Turn the dial to “Itnl” to turn on Internal Recirculation Mode, or “Etnl” to use External Recirculation, or “tt24” to use Title 24 application, or “bYPS” to use Bypass Valve. Press the dial button to select the setting and return to the installer Mode. NOTE: 7:RM can only be selected after 6:RC has been turned on.
The following section details the various Recirculation Timer Functions. Step 1: Set the Recirculation Timer Type. Setting Detail Description Allows the installer to customize the Recirculation Function. The recirculation day and time values must be set in Step 2, SEt. When set in Smart Auto-Learn, the pump will run in Standard Mode for the first seven (7) days. During this period the water heater will monitor and record hot water usage patterns.
▪ 2. Setting the Recirculation Run Time (Pro9 Recirculation Timer) NOTE: This step is only necessary if “Pro9” was selected as the Recirculation Timer Type. If “Auto” was selected the water heater will automatically program its recirculation operating patterns. a. Enter the Recirculation Timer by pressing at Standby Mode while the water heater display is powered on. b. Turn the dial until “SEt” flashes on the screen. Press the button at the “SEt” screen to set the Recirculation Run Time. See Figure 42.
f. Turn the dial . The start time on the screen will change in increments of thirty (30) minutes. When the desired start time appears on the screen, press the button to select and store it. Next, turn the dial until the desired end time appears on the display. Press the button to select and store the end time. Repeat this step to set the start and end times for more days. Figure 45 – Setting Start and End Recirculation Times g. Press and hold the button for two (2) seconds to store the time. h.
Figure 48 – Resetting the Recirculation Run Time d. The Recirculation Run Time has now been reset to the factory default settings. Press to return to Standby Mode. NOTICE If hot water is not used for more than thirty (30) hours, the recirculation program will be stopped and the water heater will automatically go into Vacation Mode and display the vacation icon . ▪ J. ERROR MODE When the water heater encounters an error, the display will flash “Er” followed by a numerical code.
Error Code Error Code Description Possible Remedies Er:16 This Error Code will go away when the DHW temperature decreases. If Error happens again: 1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for normal Operating Temperature Senoperation. sor or DHW Sensor detects 2. Check if DHW pipe is blocked. Ensure there is enough water flowing to the water heater. Water Temperature Greater 3. Check DHW sensor at DHW outlet. If resistance is zero, replace the sensor.
Error Code Er:41 Er:43 Error Code Description Possible Remedies Fan Speed too High with Flame On Press the Power button to clear the Error Code. If Error happens again: 1. Check the vent connections for blockages. 2. Check the burner assembly. 3. Check fan operation. If fan appears to be operating normally but RPMs are too low or too high, replace the fan. 4. If the problem persists, replace the main control. Burner Overheat Switch Open Press the Power button to clear the Error Code.
Error Code Er:67 Er:72 Er:73 Er:76 Er:78 Er:94 Error Code Description AGM Error Possible Remedies Press the Power button to clear the Error Code. If Error happens again: 1. Turn power OFF and ON at the main power switch internal to the water heater. 2. Ensure fan inlet hole is completely open after turning the power OFF and ON. 3. Check wiring connections to the AGM. Ensure all are secure. 4. Check AGM operation. 5. Replace AGM components. 6. If the problem persists, replace the main control.
WARNING This water heater is equipped with a blocked vent shutoff system. If Error Codes Er:29, Er:41 or Er:94 occur, turn off the gas valve at the manual shutoff. Check the vent terminations for obstructions. If no obstructions are found, reset the water heater by pressing the power button. If the error continues to occur, call a qualified service technician or the gas supplier to check the water heater. Failure to follow these instructions could result in property damage, personal injury, or death.
2. GAS DETECTION Figure 51 – Gas Detection Error Analysis Tree 3. AIR PRESSURE SWITCH Figure 52 – Air Pressure Switch Analysis Tree AP18733 REV. 3.2.
4. Inlet / DHW / Operating Temperature SENSORS Figure 53 – Inlet / DHW / Operating Temperature Sensors Error Analysis Tree AP18733 REV. 3.2.
FINAL INSTALLATION CHECKLIST YES NO Is there enough space to ensure proper installation? Does installation location allow for proper service clearances? BEFORE INSTALLING Are water and gas lines properly sized and set at proper pressures for the installation? Is water heater location as near the exhaust vent / intake pipe terminations as possible? Have combustible materials been cleared from the installation location? Is there a drain close to the water heater? Does water heater loop piping meet the
Visual check Port Port should show blue flame.
TROUBLESHOOTING TROUBLESHOOTING CHART PROBLEM POSSIBLE CAUSES POSSIBLE No electrical power to the water heater 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? REMEDIES 1. Reset the plug. 2. Reset the circuit breaker. 3. If the display panel is blank, unplug the unit or contact an authorized service technician. 4.
Check for 120V at the line voltage terminal block Correct wiring inside the water heater cabinet using located inside the water heater cabinet the wiring diagram in the installation manual Inspect the fuse. Replace as necessary Replace the fuse with the proper part found in the replacement part section of this manual.
WARNING Failure to inspect the venting system and have it repaired by a qualified service technician can result in vent system failure, causing severe personal injury or death. Visually inspect the intake piping for any signs of blockage. Inspect the entire length of the intake pipe to ensure piping is intact and all joints are properly sealed. Inspect the intake pipe bracing. Ensure bracing is undamaged and in good condition. Notify a qualified service technician if any problems are found.
WARNING Have leaks fixed at once by a qualified service technician. Failure to comply could result in substantial property damage, severe personal injury, or death. Operate Pressure Relief Valve ● Before proceeding, verify that the relief valve outlet has been piped to a safe place of discharge, avoiding any possibility of scalding from hot water. ● Shut power off to the water heater. To avoid scalding, wait for water heater to cool before operating the relief valve.
Flushing the Water Heater Flushing the heat exchanger is a complicated procedure that should only be performed by a qualified service technician. NOTE: Improper maintenance WILL VOID water heater warranty. 1. Disconnect electrical power to the water heater. 2. Close the shutoff valves on both hot water outlet and cold water inlet lines (V1 and V2). See Figure 57. 3. Connect one hose (D1, Figure 57) to the valve (V3) and place the free end in a bucket.
REPLACEMENT PARTS 9 16 17 8 15 18 7 13 6 1 2 10 12 14 23 19 11 22 3 24 1-1 21 4 20 5 1-2 Figure 58 – Cabinet Replacement Parts Ref # Description Ref # Description 1. Front Cover 13. Hot Water Pipe Assembly 1-1. Control Panel Bracket 14. Rocker Switch 1-2. Control Panel Window 15. Condensate Trap 2. PCB 16. Exhaust Assembly 3. Control Panel 17. Air Intake Assembly 4. Circulation Pump 18. Air Intake Filter 5. Mixing Valve 19. Cold Water Valve Assembly 6.
AP18733 REV. 3.2.
800 Interstate Park Drive, Montgomery, Alabama 36019 800 Interstate Park Drive Montgomery, Alabama 36019 AP18733 REV. 3.2.
WARNING Allowing the water heater to operate with a dirty combustion chamber will hurt operation. Failure to clean the heat exchanger as needed by the installation location could result in water heater failure, property damage, personal injury, or death. Such product failures ARE NOT covered under warranty. The water heater requires minimal periodic maintenance under normal conditions.
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.
