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HTP CG N73 Series Installation, Start-Up, Maintenance, Parts, Warranty

Commercial gas-fired water heaters
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Installation
Start-Up
Maintenance
Parts
Warranty
CG***N73 / CG***N65 Models
A Suffix of "X" Denotes Model Set for
Low NOx Operation
This manual must only be used by a qualified installer / service technician. Read all instructions in this manual before
installing. Perform steps in the given order. Failure to do so could result in substantial property damage, severe
personal injury, or death.
Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause
property damage, severe personal injury, or death.
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 potable (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.
272 Duchaine Blvd.
Commercial
Gas-Fired Water Heaters
New Bedford, MA 02745
www.htproducts.com
LP-436 Rev. 5.20.15

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Summary of Contents for HTP CG N73 Series

  • Page 1 Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause property damage, severe personal injury, or death. 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 AHJ. levels or to important product information. NOTE: HTP, Inc. reserves the right to modify product technical specifications and components without prior notice. DANGER indicates an imminently hazardous situation...

  • Page 4: Table Of Contents

    F. Venting System Inspection rated assembly. G. Anode Altering any HTP, Inc. water heater with parts not H. Draining the Water Heater manufactured by HTP, Inc. WILL INSTANTLY VOID the I. Vacation water heater warranty and could result in property damage, J.

  • Page 5: Improper Combustion

    F. Water Temperature Adjustment If the water heater is going to have a set temperature above High heat sources (sources generating heat 100 F / 37 C or greater, such as stove pipes, space heaters, etc.) may damage F, you must use an ASSE 1017 rated mixing valve to avoid severe burns or death from scalding temperatures.

  • Page 6: What's In The Box

    10.5 and over I. Optional Equipment If the hardness of the water exceeds the maximum level of 7 Optional equipment available from HTP (and Part #): grains per gallon, the water should be softened to a hardness High Altitude Kit level no lower than 5 grains per gallon.
  • Page 7 Figure 1 - Water Heater Dimensions - NOTE: All Dimensions Are Approximate Input Recovery 90 F / 50 Shipping Weight Lbs. Model Storage Capacity Gallons (Liters) Fuel Type (BTU) Gallons (Liters) Per Hour (Est.) CG125N73 72 (272) 125,000 135 (511) CG150N73 70 (265) 150,000...

  • Page 8: Minimum Clearances

    2. Requirements for Confined Spaces A confined space is an area where the volume is less than Locate the water heater where any leakage from the relief valve, 50 cubic feet for each 1,000 BTU/H of the total input rating related piping, tank, or connections will not result in damage for all gas appliances installed in that space.

  • Page 9: In Canada (Refer To Can/Csa B149.1)

    When ducts are used, they shall be of the same cross-sectional area as the free area of the openings to which they connect. The minimum short side dimension of rectangular air ducts shall not be less than three (3) inches (7.6 cm). In Canada (refer to CAN/CSA B149.1) a.

  • Page 10: Corrosive Atmospheres

    may be assumed the wood louvers and grilles will allow 20-25% Rotate the assembly so that the wire connector on free area and metal louvers and grilles will allow 60-75% free the water heater can plug into the flue damper motor area.

  • Page 11: Optional Side Wall Power Vent Kits

    • The length of the horizontal vent pipe must not exceed 75% of the vertical vent pipe height and never exceed 20’ (6.1 m). • All horizontal runs must have a minimum rise of ¼” (21 mm/m) per foot of run. See Figure 10. •...
  • Page 12 Figure 11 - Side Wall Power Vent Installation Detail When Using a Power Vent Kit, The Vent Termination Must Have: US Installations Canadian Installations A) Clearance above grade, veranda, porch, deck, or balcony 12” 30 cm 1.2 m below or to the side of B) Clearance to window or door that may be opened 3’...

  • Page 13: Water Piping

    covered by warranty. Power Venter (Part #) Vent Termination (Part #) 1. Temperature and Pressure Relief Valve Kit #1 6060-200 6060-202 Kit #2 6060-201 6060-203 Table 5 - Power Venter and Vent Termination Part Numbers DO NOT plug the temperature and pressure relief valve or its discharge line.

  • Page 14: Filling The Water Heater

    Figure 13 - Typical Installation 3. Filling the Water Heater together with a suitable sealing compound that is approved for natural and propane gases. It is mandatory that a readily accessible manual shut-off valve be installed in the gas supply NEVER operate the water heater unless it is completely full of line.

  • Page 15: Combination Space Heating And Potable Water Heating

    Where water temperature in excess of 140 F (60 C) is HTP, Inc. customer service. If instructed to replace any of the required for a space heating application, a mixing valve original wiring, use only 18 AWG type or greater wire approved must be installed in the potable side of the system.
  • Page 16 If the water heater requires servicing, label all wires prior to disconnecting. Verify all wiring connections before relighting the water heater. Wiring errors can result in property damage, personal injury, or death. Damages to this product due to improper wiring ARE NOT covered under warranty. Figure 15 - Wiring the Power Venter Figure 16 - Wiring Detail LP-436 Rev.
  • Page 17 Figure 17 - Wiring the Control LP-436 Rev. 5.20.15...

  • Page 18: Part 3 - Operating Instructions

    Location Complete 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? Is the main gas valve accessible for servicing? Have clearances from combustible materials been observed? Combustion and Ventilation Air Supply...

  • Page 19: Drafthood Operation

    B. Drafthood Operation It is important to check that the ventilation system is working The higher the temperature setting, the greater the risk of properly once the water heater main burner has been lit. Wait scalding. Hot water can cause third degree burns in 1 second 10 minutes after lighting the burner.

  • Page 20: Main Burner And Pilot

    the manufacturer to be held liable for any water damage in G. Anode connection with this water heater. If the problem does not This water heater is equipped with multiple anode rods that go away and water continues to drip after the water heater has are designed to prolong the life of the glass-lined tank.

  • Page 21: Getting Service For The Water Heater

    been shut off for an extended period of time before putting it back in operation. Make sure that the water heater is completely full of water and that the cold water supply manual shut-off valve is open before lighting the burner. J.
  • Page 22 Item Description CG125N73 CG150N73 CG199N73 CG250N65 CG300N65 5” Vent Damper - 125kBTU w/draft hood and motor 8800P-013 6” Vent Damper - 150kBTU w/draft hood and motor 8800P-014 6” Vent Damper - 199kBTU w/draft hood and motor 8800P-029 7” Vent Damper - 250kBTU w/draft hood and motor 8800P-015 8”...

  • Page 23: 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 24 LP-436 Rev. 5.20.15...
  • Page 25 LP-436 Rev. 5.20.15...
  • Page 26 LP-436 Rev. 5.20.15...
  • Page 27 LP-436 Rev. 5.20.15...
  • Page 28 LP-436 Rev. 5.20.15...
  • Page 29 ADDITIONAL INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS In the Commonwealth of Massachusetts, the installer or service agent shall be a plumber or gas fitter licensed by the Commonwealth. When installed in the Commonwealth of Massachusetts or where applicable state codes may apply;...
  • Page 30 3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment.

  • Page 31: Limited Warranty

    B. If HTP is unable to repair or replace the water heater so as to 9. Failure to operate the water heater in an open system with a conform to this warranty after a reasonable number of attempts, properly sized and installed thermal expansion tank.
  • Page 32 NOTE: Any parts or heaters returned to HTP for warranty analysis will become the property of HTP and will not be returned, even if credit is denied. If all warranty conditions are satisfied, HTP will provide replacement parts to the retailer.

  • Page 33: Maintenance Notes

    Maintenance Notes LP-436 Rev. 5.20.15...

  • Page 34: Customer Installation Record Form

    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. Customer’s Name Date of Installation Installation Address...

This manual is also suitable for:

Cg n65 seriesCg125n73Cg150n73Cg199n73Cg250n65Cg300n65

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