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Commercial Gas-Fired
Water Heater
INSTALLATION
START-UP
MAINTENANCE
PARTS
Models
CG125N73, CG150N73, CG199N73
CG199N73X*, CG250N65, CG300N65
*A Suffix of "X" Denotes Model Set for Low NOx Operation
This manual must be used by a qualified installer/service technician. Read all instructions in this manual before installing. Perform steps
in the given order. Failure to comply could result in substantial property damage, severe personal injury, or death.
NOTICE: HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical errors
in literature.
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.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
For your records, write the model and serial number here: MODEL #_____________ Serial #_________________
120 Braley Rd. P.O. Box 429
East Freetown, MA 02717-0429
www.htproducts.com
LP-436 REV. 3.21.14
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Summary of Contents for HTP CG125N73
- Page 1 Failure to comply could result in substantial property damage, severe personal injury, or death. NOTICE: HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical errors in literature.
- Page 2 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 GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. WHAT TO DO IF YOU SMELL GAS ...
- Page 3 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 indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
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Page 4: Table Of Contents
PART 4 – GENERAL MAINTENANCE ............................20 PART 5 – TROUBLESHOOTING GUIDE ..........................25 MAINTENANCE NOTES .................................. 33 HTP CUSTOMER INSTALLATION RECORD FORM........................34 PART 1 – GENERAL SAFETY INFORMATION A. PRECAUTIONS INSTALLER – Read all instructions in this manual before installing. Perform steps in the order given. -
Page 5: Improper Combustion
Chemical imbalance of the water supply may affect efficiency and cause severe damage to the water heater and associated equipment. HTP recommends having water quality professionally analyzed to determine whether it is necessary to install a water softener. It is important that the water chemistry on both the domestic hot water and central heating sides are checked before installing the water heater, as water quality will affect the reliability of the system. -
Page 6: Optional Equipment
6-8 TDS: 2000 ppm Sodium: 20 mGL F. OPTIONAL EQUIPMENT Below is a list of optional equipment available from HTP. These additional options may be purchased through your HTP distributor. High Altitude Kit Part # 8800P-024 – 125 kBTU ... -
Page 7: Part 2 - Installation Instructions
RECOVERY 90 F / 50 FUEL INPUT SHIPPING WEIGHT MODEL CAPACITY GALLONS (LITERS) PER TYPE (BTU) LBS. (EST.) GALLONS (LITERS) HOUR CG125N73 72 (272) 125,000 135 (511) CG150N73 70 (265) 150,000 162 (613) CG199N73(X) 68 (257) 199,900 215 (814) CG250N65... - Page 8 The water heater must be located close to a suitable free- flowing floor drain. Where a floor drain is not adjacent to the water heater, a suitable drain pan must be installed under the water heater. See Figure 10 for proper installation. The drain pan should be at least 4”...
- Page 9 additional fresh air may need to be provided. For instructions on obtaining additional air supply, see the requirements for confined spaces. Requirements for Confined Spaces A confined space is an area where the volume is less than 50 cubic feet for each 1,000 BTU/H of the total input rating for all gas appliances installed in that space.
- Page 10 The flue damper/drafthood assembly has been shipped from the factory in a separate box attached to this water heater. Before installing the flue damper/drafthood assembly, verify that it is the correct model for this water heater (the CG125N73 uses a 5” flue damper, all other 73 gallon models use a 6”...
- Page 11 separate venting system from other appliances. In some installations, proper venting may require the use of a larger diameter vent pipe and/or combined venting with other appliances. Consult the vent tables in the ANSI Z223.1/NFPA 54 in the United States, of CAN/CSA B149.1 National Gas and Propane Installation Code, in Canada, to correctly size the vent pipe.
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Page 12: A) Clearance Above Grade, Veranda, Porch, Deck, Or Balcony
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. MOTOR DIMENSIONS (INCHES) VENT HOOD INLET / MODEL KIT# Watts Amps ROUGH-IN OUTLET (sq) (sq) (sq) CG125N73 1.26 7½ 7 3/8 CG150N73 to (dia) (sq) (dia) 1.51 9¼ 8½ 11½ 9½ 9½... - Page 13 Table 4 – Power Venter and Vent Termination Part Numbers DRAFT VENT VENT VENT MODEL HOOD REDUCER SIZE ADAPTER OUTLET LOCATION 5” 4” 5”-4” CG125N73 6” 6” CG150N73 Not Req. 6” 6” CG199N73(X) Not Req. 7” 6” 7”-6” CG250N65 8” 6”...
- Page 14 Pressure Build-Up in a Water System When the water heater operates, the heated water expands creating a pressure build-up. This is a natural function and is one of the reasons for installing a temperature and pressure relief valve. If the cold water supply line has a built-in water meter, check valve, or pressure-reducing valve, a suitable expansion tank must be installed to prevent pressure build-up or water hammer effect.
- Page 15 All piping and components that are used in the system must be of a nonferrous type suitable for potable water. This also applies to any sealant used. The water heater must not be connected to any system that has been previously used for non-potable water heating. This includes piping because existing piping may have been treated with chemicals for cleaning or sealing the system in the past.
- Page 16 HTP, Inc. customer service. If instructed to replace any of the original wiring, use only 18 AWG type or greater wire approved for 221 F (105 If you are installing a side wall power vent kit, use the following instructions to connect the power venter to the water heater. See Figures 11 and 12.
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Page 19: Part 3 - Operating Instructions
Installation Checklist Location Is the water heater located close to the chimney or the gas vent and the main use of hot water? Is the water heater protected from freezing temperatures? Has a drain pan been installed and piped to a free-flowing drain? ... -
Page 20: Part 4 - General Maintenance
Drafthood Operation It is important to check that the ventilation system is working properly once the water heater main burner has been lit. Wait 10 minutes after lighting the burner. Then introduce a match or candle around the opening of the drafthood. If the flame is drawn towards the opening, this indicates proper ventilation. - Page 21 If the water heater has been undersized. When large amounts of hot water are drawn from the water heater in a short period of time, and the refill water is very cold. Due to the efficiency rating of this gas-fired water heater, it may produce more condensation than previous water heater models. Condensation forming on the flue tubes will drop on the burner, making a “sizzling”...
- Page 22 Hydrogen gas can be produced in a hot water system that has not been used for a long period of time (generally 2 weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE. It is highly recommended to open the hot water faucet in the kitchen for several minutes before you use any electrical appliances connected to the hot water system, such as a dishwasher or washing machine.
- Page 23 Figure 15 – Water Heater Assembly Item Description CG125N73 CG150N73 CG199N73 CG250N65 CG300N65 Vent damper 5"- 125 kBTU w/ draft hood and motor 8800P-013 Vent damper 6"- 150 kBTU w/ draft hood and motor 8800P-014 Vent damper 6"- 199 kBTU w/ draft hood and motor 8800P-029 Vent damper 7"- 250 kBTU w/ draft hood and motor...
- Page 24 8800P-035 Temperature & Pressure Relief Valve 8800P-036 Anode 8800P-037 Baffle 8800P-038 Fuel Manifold 8800P-039* Burner Orifices - 125 kBTU 8800P-040 Burner Orifices - 150 kBTU 8800P-041 Burner Orifices - 199 kBTU 8800P-042* Burner Orifices - 250 kBTU 8800P-043 Burner Orifices - 300 kBTU 8800P-044 Burner Assembly - 125 kBTU 8800P-045...
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Page 25: Part 5 - Troubleshooting Guide
PART 5 – TROUBLESHOOTING GUIDE LED Diagnostic System This water heater is equipped with an LED (light emitting diode) diagnostic system, which is located in the black electrical box on the front left hand side of the water heater. The diagnostic system is designed to give the user or qualified service technician a visual indication of the operational status of the different parts of the water heater’s control system. - Page 26 LP-436 REV. 3.21.14...
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Page 33: Maintenance Notes
MAINTENANCE NOTES LP-436 REV. 3.21.14... -
Page 34: Htp Customer Installation Record Form
HTP 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. - Page 35 B. If HTP is unable to repair or replace the water heater so as to conform to this warranty after a reasonable number of attempts, HTP will then provide, at its option, a replacement unit.
- Page 36 NO OTHER WARRANTIES This HTP Warranty gives you specific legal rights, and you may also have other rights that vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages so this limitation or exclusion may not apply to you.
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