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Installation and Operation Manual
Model AHG-T42
American Hometec, Inc.
3411 Silverside Road
Hanby Building
Wilmington, DE 19810
WARNING: If the information in these instructions is not followed exactly, a fire or
explosion may result causing property damage, personal injury or death.
- 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.
•
Do not touch any electrical switch; do not use any phone in your building.
•
Immediately call your gas supplier from a neighbor's phone.
•
Follow the gas supplier's instructions.
•
If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency or the gas
supplier.
- Water heater for other than recreational vehicle installation only.
Gas Tankless Water Heater
www.AmericanHometec.com
service@americanhometec.com
Toll Free: 1
800
295
8039
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Summary of Contents for American Hometec AHG-T42-NG
- Page 1 Gas Tankless Water Heater Installation and Operation Manual Model AHG-T42 American Hometec, Inc. 3411 Silverside Road Hanby Building Wilmington, DE 19810 WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
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Page 2: Table Of Contents
Contents INTRODUCTION AND SAFETY WARNINGS INTRODUCTION IMPORTANT SAFETY INSTRUCTIONS SAFETY WARNINGS OPERATION DESCRIPTION OF OPERATION OPERATING INSTRUCTIONS EXTENDED SHUTDOWNS COLD WEATHER WARNINGS MAINTENANCE AND INSPECTION TROUBLESHOOTING DIAGNOSTIC CODES INSTALLATION INSTALLATION GUIDELINES PACKING LIST LOCATION AND CLEARANCE REQUIREMENTS TYPICAL INSTALLATION MOUNTING ELECTRICAL GAS PIPING WATER PIPING... -
Page 3: Introduction And Safety Warnings
INTRODUCTION AND SAFETY WARNINGS INTRODUCTION ™ Thank you for purchasing an American Hometec Gas Tankless Water Heater. In order to ensure proper installation, safe operation, and long life, please carefully read these instructions. Installation should only be completed by licensed professionals. -
Page 4: Safety Warnings
SAFETY WARNINGS DO NOT use a fuel gas that is not listed on the nameplate as compatible with the water heater. Abnormal combustion or a deflagration may occur which can cause a serious accident DO NOT use the unit if the vent piping has been damaged or altered in any way including cracking, separation, rusting, melting, etc. - Page 5 This equipment may not be operated without the vent pipe properly connected. The exhaust pipe must not terminate in an area where the exhausting vapor or collecting condensate could create a hazardous situation or cause property damage. Exhaust gases must be vented out of the building in compliance with all building codes.
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Page 6: Operation
OPERATION DESCRIPTION OF OPERATION American Hometec gas tankless water heaters provide an efficient reliable supply of hot water. The temperature can be adjusted between 95 F and 149 F (35 C - 65 Only a small amount of water and a low water pressure (15psi) are required for the unit. Unit requires 0.67 gpm (2.5 l/min) to enable the unit. -
Page 7: Operating Instructions
OPERATING INSTRUCTIONS Normal Operation This section of the manual instructs an owner on routine operating procedures and assumes that the water heater has already been installed, tested, and approved for operation. Initial start up requirements is detailed in the “Installation” section of this manual. Routine Start Up Follow this procedure for a heater that has been out of service. - Page 8 Figure 2 - Control Panel Diagram Failure mode displays when a failure occurs, temperature display mode is When the water temperature is above switched to failure display mode. 95° F (35° C) the lamps are lit one by one from bottom to top. Description of the mode key F3 current water quantity F4 preset water quantity...
- Page 9 TEMPERATURE CONTROL Set the Desired Temperature 1. The temperature adjustment range is 95 F - 149 F (35 C – 65 2. Press the “OFF/ON” key. The temperature display unit lights up and displays the current temperature set point. The factory default set point is 107 F (42 3.
- Page 10 H2O SAVER TECHNOLOGY™ - Set a Desired Volume 1. The volume display range is 0-250 gallons when system is set to use English units or 0-950 liters when in metric mode. 2. Press the “MODE” key briefly to display the message “F4”, then press the “UP” ( or “DOWN”) key.
- Page 11 WIRED REMOTE CONTROL PANEL The heater may be controlled by a wired remote control (optional). The controller can be located near a bath, shower or other location. Remote Control Panel Indications “Combustion” - When lit indicates that the water heater is operating and burning gas. “Override”...
- Page 12 1. Turn off the override if it is set on another controller. Press and hold the “Override” key to release priority. The Override indicator light will go out. 2. Select the new controller to take control. Press and hold the “Override” key on the wired operation panel which should have priority.
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Page 13: Extended Shutdowns
EXTENDED SHUTDOWN Extended Outage Procedure If a heater will be out of service for an extended amount of time, use the following procedure to protect the unit. NOTES Cold air may enter the unit through the air intake or the exhaust system. Take precaution for extended shutdowns even if unit is installed indoors in an area that does not allow direct exposure to freezing temperatures. - Page 14 7. Open the drain plugs and completely drain the water heater. 8. Continue draining to empty the whole hot water system. Note: Freezing temperatures below 32 F (0 C) can cause permanent damage to the heater and/or the piping system. 9.
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Page 15: Cold Weather Warnings
COLD WEATHER WARNINGS Freezing Damage Potential and Precautions Freezing temperatures can damage the water heater and/or water piping. Freezing water expands rapidly and can create tremendous mechanical forces. Mechanical damage and pipe ruptures can result from only brief exposure to freezing temperatures. For best results, completely shut down the system by following the Extended Outage Procedure section of this manual. -
Page 16: Maintenance And Inspection
An annual inspection is normally sufficient. Frequent visual inspections by the owner are also recommended. Any repairs should be performed by a qualified service technician using only factory authorized components. Contact American Hometec at 1- 800-295-8039 or see www.americanhometec.com for assistance in locating a qualified technician. - Page 17 Lime scale cleaning (if required), See procedure in Maintenance Procedures that follow. MAINTENANCE PROCEDURES BURNER INSPECTION AND CLEANING 1. The burner must flame evenly over the entire surface of the burner head when operating correctly. 2. The flame should burn with a clear, blue, stable flame. 3.
- Page 18 7. Open valves V1 and V2 into the water heater. 8. Operate the pump. Circulate the cleaning solution through the water heater for at least 45 minutes. 9. Turn off the pump. 10. Rinse the cleaning solution from the water heater by closing valve V2 and opening valve V4, flow water through the heater and into a container or drain for at least five minutes.
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Page 19: Troubleshooting
For operating difficulties with your unit, please consult he following table for guidance. If you need further assistance, call American Hometec, Inc. toll free service and support line at 1-800-295-8039. Please have product information ready when you call including serial number, date of purchase and error code if shown on the control panel. - Page 20 Trouble Possible Cause Remedy Temperature set point was Power outage restores default settings and reset due to power outage. custom set points must be re-entered to unit Temperature set point A remote wired controller is controlling incorrect. temperature set point. Release override control of this remote (see “Remote Control Panel Functions”) or change set point to desired temperature with that remote.
- Page 21 Consult American Hometec by calling 1-800-295-8039 or contact an authorized Unresolved problem Other assistance required service professional.
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Page 22: Diagnostic Codes
DIAGNOSTIC CODES Whenever a failure occurs, an alert sounds and a diagnostic code is displayed to indicate the failure mode at the time of occurrence. The following table includes a list of diagnostic codes Figure 5 - Control Panel that can be displayed as well as recommended Example- Displaying Error remedies to address the problem. - Page 23 Code Indication Remedy 1. Connect the relevant circuit properly Flame detection error. and eliminate the bad connection. Replace any failed circuit elements. 1. The detection circuitry for ignition and flame detection has come loose or failed to connect. 2. Check fuel gas supply. （especially 2.
- Page 24 Overheating occurred 1. Overheating occurred. Possible 1. Normal system function. This should causes include operating at a very be a very infrequent event. Correct high load for a long period and then gas or water supply issues if there there is a sudden event such as are frequent reoccurrence.
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Page 25: Installation
Failure to comply with state and local codes pertaining to water heater installations may void also warranty. American Hometec water heaters are suitable for installation as a single standalone unit or in installations involving combinations of multiple units (i.e. parallel or series). These guidelines are for the installation of a single unit. -
Page 26: Packing List
PACKING LIST The following contents are included. If any items are missing contact American Hometec’s toll free support line: 1-800-295-8039. Item Item # Quantity Water Heater Installation and Operation Manual Expansion Bolts Seal Ring Self-tapping Screw Expansion Anchors A: Water Heater (color... -
Page 27: Location And Clearance Requirements
LOCATION AND CLEARANCE REQUIREMENTS CLEARANCE TYPICAL INSTALLATION LOCATION Choose a location for unit installation taking into account the following guidelines. Unit must be installed indoors. Installation is not recommended in bathrooms, bedrooms or occupied rooms that are normally kept closed. ... -
Page 28: Mounting
CLEARANCE REQUIREMENTS ADJACENT MATERIAL COMPOSITION NON-COMBUSTIBLE COMBUSTIBLE SIDE 2 inches 50 mm 2 inches 50 mm 2 inches 50 mm 6 inches 300 mm FLOOR : 12 inches 300 mm 12 inches 300 mm FRONT : 24 inches 600 mm 24 inches 600 mm BACK :... -
Page 29: Electrical
4. (For installation on Concrete or Block) Drill three each 5/16” (or 8 mm) holes at the marked locations. Insert the supplied ¼” (6 mm) Steel expansion bolts into the holes. 5. (For wall installation) Locate a stud and use supplied mounting screws or hollow Wall Anchors. - Page 30 8. Insert the two y-shaped wire terminal connectors, and then fasten the screw to secure the terminal connectors. 9. Mount controller to wall by drilling 2) 6mm holes 92mm apart at installation location, and insert the Expansion Anchors supplied. 10. Separate the panel cover from the remote base, secure remote base to wall with (provided) screws.
- Page 31 4. Insert the wire terminals of cable ② into it’s socket on PCB controller and connect them by using a screw driver ② ② 5. Assemble and Fasten the PCB controller and assemble the front cover of unit6.Connect the plug of cable ① to the socket of cable ② secured at the bottom cover of unit and fasten it ①...
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Page 32: Gas Piping
GAS PIPING Gas piping should be sized, installed, and tested only by a licensed professional! Improper installation can result in improper equipment performance or a hazardous situation. 1. Check the fuel gas type before installation. DO NOT connect a unit if the gas type is not compatible. -
Page 33: Water Piping
WATER PIPING 1. All piping, including soldering material, and components connected to this heater shall be approved for use in potable water systems. 2. If the heater has ever been previously used for heating non-potable water, never install the heater later into a potable water system. 3. -
Page 34: Air Intake And Exhaust (Vent) System
AIR INTAKE AND EXHAUST (VENT) SYSTEM Improper venting of a water heater can result in excessive levels of Carbon Monoxide which can result in severe injury or death! This water heater must be vented in accordance with the “Venting of Equipment”... - Page 35 This can create a situation where freezing might occur within the heater. Please consult a professional for a properly designed venting solution or contact American Hometec for guidance. AIR INTAKE PIPE ASSEMBLY 1.
- Page 36 Figure 6 - ANS Z21.10.3 / CSA 4.3 Reference Clearance Description US Install Canada Install Above grade, veranda, porch, deck, or balcony 12 inches (300 mm) 12 inches (300 mm) To window or door that may be opened 12 inches (300 mm) 36 inches (910 mm) Permanently closed window Vertical to ventilated soffit, located above the...
- Page 37 Maximum Vent length 1. Determine the number of 90 degree elbows in the vent system (Two 45 degree elbows count as one 90 degree elbow) 2. Refer to below table to find the maximum vent length based on the number of elbows Example: If you have one elbow, then your maximum vent length is 35ft (10.7m) Number of 90 elbows...
- Page 38 Page 38...
- Page 39 Hart & Model SW 4STWP 4SRC 4STM, 4CHT, 4STM, 4CVT, Cooley 4C12, 4CTAI 4CF(A,B,C), 7SSC, 4C36, 4CRC Manufacturer Contact Information Manufacturer American Hometec, Inc Z-Flex Heat-Fab Hart & Cooley Telephone 800-NO COILS 800-654-5600 800-772-0739 800-433-6341 888-889-3539 423-863-4803 800-223-8461 E-Mail info@americanhometec.com sales@z-flex.com...
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Page 40: Start Up And Testing
START UP AND TESTING WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. - Page 41 16. If the heater will not operate, follow the shut down instructions. Wait 5 minutes and attempt to repeat this start up procedure. 17. If system does not operate, begin troubleshooting per “Trouble Shooting” section of this manual. Contact American Hometec for assistance. Page 41...
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Page 42: Reference
REFERENCE WIRING DIAGRAMS Figure X. - AHG-T42 wiring diagram (without wired remote) I nd uc ti on N ee dle Yel low ,Ye ll ow B la ck (GND ) C on ne ct t o b as e co ve r W hi t e B l ac k Wa te r Fl ow S en so r... - Page 43 Figure X. - AHG-T42 wiring diagram (with wired remote) I nd uc ti on N ee dle Yel low ,Ye ll ow B la ck ( G N D ) C on ne ct t o b as e co ve r W hi t e B l ac k Wa te r Fl ow S en so r...
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Page 44: System Specifications
SYSTEM SPECIFICATIONS Model No AHG-T42-NG AHG-T42-LP Type of Appliance Temp. controlled continuous Flow Gas Hot Water Unit With/without remote controls, mounted in Kitchen, Operation bathroom, etc. Flue System Room Sealed-Forced Draught Flue Available default Temperatures factory setting 107℉ Nature gas 7 inch W.C.(1 740Pa) -
Page 45: Dimenisions
DIMENSIONS 5.59"(142) 3.94"(100) 3.15"(φ80) 3.15"(φ80) Water Co m bust i on Valve C / L Dow n M ode Off /On 13.9"(353) NAMES OF MAJOR PARTS AND COMPONENTS Exhaust Duct Air Duct Fume collecting hood Heat shield Thermal fuse Heat exchanger assembly Thermostat Controller(PCB) Flame Rod... -
Page 46: Spare Parts
SPARE PARTS (NEED TO COMPLETELY REVIEW PARTS LIST) The following spare parts are available for purchase and maybe replaced by a licensed professional. Please contact American Hometec, Inc.’s toll free support line at 1-800-295-8039. Part Part Number Control panel AHG42CP... -
Page 47: Limited Warranty
Limited Warranty Register unit at www.AmericanHometec.com General The manufacturer warrants this water heater and its components to be free from defects in material and workmanship according to the terms herein. The heat exchanger within this product is warranted against manufacturer defects for up to 10 years for residential water heating applications or up to 5 years for commercial and industrial applications. - Page 48 FROM STATE TO STATE. Making a Claim Owner should submit the warranty claim directly to American Hometec, Inc. by contacting us at the phone number shown below. If you are advised to return the unit, you must obtain a Returned Materials Authorization (RMA) over the phone BEFORE RETURNING THE UNIT.
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