Super Hot EPJ-119-SC, Installation And Service Manual

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EPJ SERIES INDIRECT WATER HEATERS – Installation and Service Manual
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3.3 DOMESTIC WATER PIPING
Connect domestic cold water in to the “DRAIN/COLD WATER IN” fitting and the domestic hot water out to
the “HOT WATER OUTLET” fitting. Use Teflon tape, pipe dope, or both on all threaded fittings. Connect a
drain valve near the cold water inlet connection so that the tank can be drained. Connect a control aquastat
and thermowell to the “SENSOR WELL” fitting. The use of shut off valves and brass or dielectric unions are
recommended when installing your water heater for future service convenience and to prevent galvanic
corrosion.
If a backflow preventer, check valve or pressure reducing valve is installed upstream of the tank on the cold
water inlet, a potable water expansion tank of adequate capacity must be installed in accordance with the
manufacturer’s instructions. Do not install any valve or restrictions between the expansion tank and the hot
water tank. Improper piping of the expansion tank, check valve or backflow preventer could cause excessive
pressure in the tank, tank failure and substantial property damage.
A T&P relief valve must be installed. See section 3.5 T&P Relief Valve for important requirements.
A vacuum breaker can protect the tank from collapse. A vacuum breaker must be installed in the cold water
supply line with or above the highest point in the tank. No valve is to be placed between the vacuum breaker
and the tank. The vacuum breaker manufacturer’s instructions must be followed.
To prevent heat loss due to gravity flow from the tank, a check valve or heat trap with a minimum 12 inch
drop should be installed as close to the “hot water outlet” fitting as practical.
3.4 DOMESTIC WATER PIPING DIAGRAM
Domestic Piping with Optional Recirculation and Thermostatic Mixing Valve