Instruction Manual COMMERCIAL GAS WATER HEATERS INSTALLATION - OPERATION - SERVICE - MAINTENANCE Low Lead Content 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.
Table Of Contents SAFE INSTALLATION, USE AND SERVICE...................... 3 Outdoor Air Through Two Horizontal Ducts................ 14 Approvals....................................................................... 3 Outdoor Air Through Two Vertical Ducts.................... 14 GENERAL SAFETY INFORMATION................................... 4 Air From Other Indoor Spaces................................... 14 INTRODUCTION................................................................. 5 Venting.....
Safe Installation, Use and Service The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual.
general safety INFORMATION 4
Introduction the safety rules, the water heater will not operate properly. It could cause DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE. Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service. Abbreviations Used This manual contains instructions for the installation, operation, and maintenance of the gas-fired water heater. It also contains warnings throughout the manual that you must read and be aware of.
Installation considerationS ROUGH IN DIMENSIONS FIGURE 1. TABLE 1. Dimensions and Recovery Ratings DIMENSIONS Model Units A B C D E F G H J K L M 75 Natural & LP Inches CM 61 1/8 155.25 58 1/2 148.6 29 11/16 75.4 26 1/2 67.3 15 3/16 38.6 4 10.2 14 1/2 39.4 16 40.6 1 1/4 3.2 1 NPT 1/2 NPT 11 15/16 30.3 100 Natural & LP Inches CM 68 5/8 174.3 66 1/2 168.9 30 15/16 78.59 27 3/4 70.5 15 3/16 38.6 4 10.2 15 3/4 40.0 16 40.6 1 1/4 3.2 1 1/4 NPT 1/2 NPT 11 15/16 30.
THERMOMETERS (Not Supplied) the structure. For this reason, it is not advisable to install water heater in an attic or upper floor. When such locations cannot be avoided, a suitable metal drain pan should be installed under the water heater. Metal Drain pans are available at your local hardware store. Such a metal drain pan must have a minimum length and width of at least 2” (51 mm) greater than water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air flow.
Clearances used in the same room or area containing a gas water heater or other open flame or spark producing appliance. NOTE: Flammable vapors may be drawn by air currents from other areas of the structure to the appliance. Minimum clearances between the water heater and combustible construction are 0 inch at the sides and rear, 4” (102 mm) at the front, and 6” (153 mm) from the vent pipe. Clearance from the top of the jacket is 12” (305 mm) on most models.
INSULATION BLANKETS Circulation Pumps A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the water heater. See Water Piping Diagrams in this manual for installation location of circulating pumps. Breathing Hazard - Carbon Monoxide Gas See the Circulation Pump Wiring Diagrams below for electrical hookup information.
Installation requirements Mixing Valves GAS SUPPLY SYSTEMS Low pressure building gas supply systems are defined as those systems that cannot under any circumstances exceed 14” W.C. (1/2 PSI Gauge). These systems do not require pressure regulation. Measurements should be taken to insure that gas pressures are stable and fall within the requirements stated on the water heater rating plate.
Water Piping WATER (POTABLE) HEATING AND SPACE HEATING This water heater shall not be connected to any heating systems or component(s) used with a non-potable water heating appliance. All piping components connected to this unit for space heating applications shall be suitable for use with potable water. Toxic chemicals, such as those used for boiler treatment shall not be introduced into this system.
Note: In addition to the factory installed Temperature-Pressure Relief Valve on the water heater, each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized, rated and approved TemperaturePressure Relief Valve installed. Call the toll free technical support phone number listed on the back cover of this manual for technical assistance in sizing a Temperature-Pressure Relief Valve for remote storage tanks.
Outdoor Air Through Two Openings amount of combustion air can result in a fire or explosion and cause property damage, serious bodily injury or death. Unconfined Space An Unconfined Space is one whose volume is not less than 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space.
Outdoor Air Through Two Horizontal Ducts enclosure. The vertical ducts shall communicate directly with the outdoors. See Figure 11. Each duct opening shall have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. 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 dimension of rectangular air ducts shall be not less than 3 inches.
If the water heater is being installed as a replacement for an existing heater in pre-existing venting, a thorough inspection of existing venting system must be performed prior to any installation work. The vent pipe from the water heater must be no less than the diameter of the draft hood outlet on the water heater and must slope upward at least 1/4 inch per linear foot (21 mm per meter). See Figure 14.
Gas Piping TABLE 4. LENGTH IN METERS Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area. Size the main gas line in accordance with Table 3. The figures shown are for straight lengths of pipe at 0.5 in. W.C. pressure drop, which is considered normal for low pressure systems. Note: Fittings such as elbows, tees and line regulators will add to the pipe pressure drop.
SEDIMENT TRAPS Contaminants in the gas lines may cause improper operation of the gas control valve that may result in fire or explosion. Before attaching the gas line be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a sediment trap must be incorporated in the piping. The sediment trap must be readily accessible. Install in accordance with the “Gas Piping” section. Refer to the current edition of the National Fuel Gas Code, ANSI Z223.
FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED AT FAUCETS. A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING: smell all around the appliance area for gas.
TEMPERATURE REGULATION Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 30°F (16.7°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards. Never allow small children to use a hot water tap, or to draw their own bath water. Never leave a child or handicapped person unattended in a bathtub or shower.
CHECKING GAS INPUT Good venting is essential for a gas fired water heater to operate properly as well as to carry away products of combustion and water vapor. With this heater in operation, determine whether it is receiving the full rated input of gas. This may be done by timing the gas meter and measuring gas pressure with a gauge or manometer. When the heater is operating at full capacity (full gas input) it should consume approximately 1 cubic foot of gas in the time shown in Table 5.
(generally two weeks or more). Hydrogen gas is extremely flammable and explosive. To prevent the possibility of injury under these conditions, we recommend the hot water faucet, located farthest away, be opened for several minutes before any electrical appliances which are connected to the hot water system are used (such as a dishwasher or washing machine). If hydrogen gas is present, there will probably be an unusual sound similar to air escaping through the pipe as the hot water faucet is opened.
Housekeeping It is recommended that the Temperature-Pressure Relief Valve should be checked to ensure that it is in operating condition every 6 months. When checking the Temperature-Pressure Relief Valve operation, make sure that (1) no one is in front of or around the outlet of the Temperature-Pressure Relief Valve discharge line, and (2) that the water discharge will not cause any property damage, as the water may be extremely hot. Use care when operating valve as the valve may be hot.
Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption. To clean heater through cleanout opening, proceed as follows: 1. Drain heater. The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule for deliming be maintained. 2.
4. Put cap with male adapter back on the container and slide 3/4” hose over end of male adapter and fasten in place using hose clamp provided. Delime using Flo-Jug Method 6. Connect a hose to the water heater drain valve and terminate it to an adequate drain. 7. Open the water heater drain valve and allow all the water to drain from the storage tank. 8. 5. Slide the hose clamp over end of hose and slide hose over the male adapter in the water heater drain opening and secure in place using hose clamp.
LEAKAGE CHECKPOINTS A. Water at the draft hood is water vapor which has condensed out of the combustion products. This is caused by a problem in the vent. Contact the gas utility. B. *Condensation may be seen on pipes in humid weather or pipe connections may be leaking. C. *The anode rod fitting may be leaking. D. Small amounts of water from temperature-pressure relief valve may be due to thermal expansion or high water pressure in your area. E.
TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualified service agent. Problem WATER LEAKS LEAKING T&P VALVE SMELLY WATER PILOT WILL NOT LIGHT BURNER WILL NOT STAY LIT PILOT OUTAGE NOT ENOUGH HOT WATER WATER TOO HOT WATER HEATER SOUNDS SIZZLING OR RUMBLING SOOTING Cause Solution Improperly sealed, hot or cold supply connection, relief valve, drain valve, or thermostat threads. Tighten threaded connections. Leakage from other appliances or water lines.
COLD COLD WATER SUPPLY DRAIN TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE TEMPERATURE & PRESSURE RELIEF VALVE EXPANSION TANK COLD NOTES: 1. Preferred piping diagram. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit. However, local codes shall govern their usage. 4.
COLD ALT. COLD WATER CONNECTION HOT WATER TO FIXTURES NOTES: 1. Preferred piping diagram. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit. However, local codes shall govern their usage. 4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s). 5.
COLD HOT WATER TO FIXTURES DRAIN TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE TEMPERATURE & PRESSURE RELIEF VALVE ALTERNATE LOCATION NOTES: 1. Preferred piping diagram. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit. However, local codes shall govern their usage. 4.
LINE TEMPERATURE CONTROL HOT WATER RETURN TEMPERED WATER RETURN TEMPERED WATER OUTLET DRAIN PIPE T&P TO OPEN DRAIN MINIMUM 10´´ to 12´´ HOT COLD TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE TEMPERATURE & PRESSURE RELIEF VALVE HOT WATER OUTLET NOTES: 1. Preferred piping diagram. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit.
HOT COLD PIPE T&P TO OPEN DRAIN HOT COLD NOTES: 1. Preferred piping diagram. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit. However, local codes shall govern their usage. 4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
HOT COLD EXPANSION TANK COLD WATER SUPPLY PIPE T&P TO OPEN DRAIN HOT WATER RETURN HOT NOTES: 1. Preferred piping diagram. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
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