INSTALLATION
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Temperature/Pressure Relief Valves | Pressure Reducing Valve | |||||||||
For protection against excessive pressures and temperatures in |
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the booster heater, install temperature/pressure protective |
| CAUTION |
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equipment required by local codes. The temperature/pressure |
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If water supply pressure to the booster water heater inlet | ||||||||||
relief valve supplied with this booster water heater is | ||||||||||
constructed with brass working parts and heat resistant silicone | is over 20 psi (138 kPa) during flow, install a commercial- | |||||||||
seat discs. | grade pressure reducing valve with | |||||||||
proper operation of dish machine rinse nozzles. | ||||||||||
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| WARNING |
| NOTE: The pressure reducing valve must be the type | |||
Temperature/pressure |
| protective equipment should not be | equipped with a high pressure bypass like the valve | |||||||
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less than a combination temperature/pressure relief valve | supplied with this booster water heater. | |||||||||
certified by a nationally recognized testing laboratory that | Proper operation of the commercial dish machine rinse nozzles | |||||||||
maintains periodic inspection of the production of this | requires that available water pressure at the rinse nozzle be | |||||||||
equipment and meets the requirements for Relief Valves | between 15 and 25 psi (103 and 172 kPa) when the nozzle is | |||||||||
and Automatic Shutoff Devices for Hot Water Supply | operated. 20 psi (138 kPa) is recommended. If water pressure | |||||||||
Systems, ANSI | available to the booster water heater inlet is over 20 psi | |||||||||
relief valve must be marked with a minimum set pressure | (138 kPa), a pressure reducing valve must be installed in the hot | |||||||||
not to exceed the marked hydrostatic test pressure of the | water supply line to the booster water heater and adjusted to | |||||||||
booster heater as noted on the unit specifications. | deliver 20 psi (138 kPa) flow pressure. | |||||||||
FOR INSTALLING COMBINATION TEMPERATURE/ | The valve supplied with the unit has a | |||||||||
PRESSURE RELIEF VALVES IN ACCORDANCE WITH | bypass that prevents excessive pressure | |||||||||
AMERICAN NATIONAL STD. | booster heats up. Final adjustment is required at the time of | |||||||||
temperature/pressure relief valves with extension | installation. | |||||||||
thermostats must be installed so that the temperature- | Temperature/Pressure Gauges | |||||||||
sensing element is immersed in the water within the top 6" | ||||||||||
(152 mm) of the tank. They must be installed either in the |
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hot outlet service line or directly in a tank tapping. |
| CAUTION |
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Combination temperature/pressure relief valves that do |
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Bradford White requires that two temperature/pressure | ||||||||||
not have extension elements must be mounted directly in | ||||||||||
a tank tapping located within the top 6" (152 mm) of the | gauges be installed to assure proper operation. Install one | |||||||||
tank, and shall be adequately insulated and located so as | in the supply line before the pressure reducing valve and | |||||||||
to assure isolation from the flue gas heat or other ambient | one in the outlet line as close to the booster water heater | |||||||||
conditions that are not indicative of stored water | as possible. This provides a visual check of the water | |||||||||
temperature. TO AVOID WATER DAMAGE OR SCALDING | temperature and pressure before and after the water | |||||||||
DUE TO VALVE OPERATION, DRAIN PIPE MUST BE | heater. | |||||||||
CONNECTED TO VALVE OUTLET AND RUN TO A SAFE | NOTE: If a check valve is installed and cannot be removed | |||||||||
PLACE OF DISPOSAL. Discharge line must be as short as | install a back pressure relief valve set at 125 psi (862 | |||||||||
possible and be the same size as the valve discharge | kPa) on the incoming line between the pressure | |||||||||
connection throughout its entire length. Drain line must | reducing valve and the inlet to the booster water | |||||||||
pitch downward from the valve and must terminate | heater. Discharge must be to open site drain (see | |||||||||
between | Figure 7). | |||||||||
drain where any discharge will be clearly visible. The drain | ||||||||||
line shall terminate plain, not threaded, with material | Blended Phosphate Water Treatment | |||||||||
greater. Excessive length, over 30' (9144 mm), or use of | System (optional) | |||||||||
serviceable for temperatures up to 250°F (121°C) or | Bradford White recommends that the Blended Phosphate Water | |||||||||
more than four elbows can cause a restriction and reduce | ||||||||||
the discharge capacity of the valve. No | Treatment System be installed with unions on the incoming 3/4" | |||||||||
be installed between the relief valve and tank, or in the | water supply line after the pressure reducing valve and before | |||||||||
drain line. Valve lever must be tripped periodically to | the booster water heater. | |||||||||
assure that waterways are clear. This device is designated | Cartridges supplied have a usage rating of 100,000 gallons | |||||||||
for emergency safety relief and shall not be used as an | (378,541 liters) of water. To assure proper operation the | |||||||||
operating control. The valves are set to relieve at 150 psi | cartridges must be replaced when expired. | |||||||||
(1034 kPa) or when water temperature reaches 210°F | NOTE: Product failure caused by liming or sediment buildup is | |||||||||
(99°C). Read tag on valve for additional information. | ||||||||||
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| not covered under warranty. | |||
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| CAUTION |
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BURN HAZARD: Valves supplied with | this booster water |
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heater are designed for high temperature commercial |
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operation. Do not substitute these valves with valves |
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designed for domestic water heaters. |
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Do | not use an |
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water line. |
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| 8 |
| Form No. | ||||||