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Special Instructions
1
2
3
3
4
5
6
7
8
Hot Water Out
Cold Water In
Temp. / Pressure
Relief Valve
Aquastat, close on rise.
Optional
Automatic
Air Valve
Pressure Relief
Valve - Must be
within 2 ft. of coil
Optional Gate
Valve to Control
Rate of Flow
Circulator Pump
Drain
Valve
Distance between of more than 10 feet
Circulating Pump Method - Distance = 10 Feet or More
This method is used when the water heater tank is more than ten feet away from the furnace or the fur-
nace is on a higher level than the water heater tank. In addition to a circulator pump, you may want to add
a aquastat to thermostatically control the pump according to water temperature. This is optional and not
necessary if the circulator pump is left run continuously. Another option is a gate valve placed near the
pumptocontroltherateofwaterow.
A. Shut off the water heater and the water supply to it. Drain the tank completely.
B. Remove the Temp. / Presure relief valve and discard. Install a short 3/4 in. nipple and tee (1) along with
a new relief valve.
C. Remove the drain valve, at the bottom of the tank. Install a short 3/4 in. nipple and tee and re-install the
drain valve to the tee (4).
D. Install a circulating pump as shown (6). Run 3/4” copper tubing from the circulating pump to the lower
legofthewatercoil.Thisiswheretheoptionalgatevalve(5)canbeinstalledtoregulateow.
E. Install a 3/4 in. tee and a 150 lb. Pressure relief valve (7) in the top leg within two feet of the coil.
F. Complete the 3/4 in. line by running it back to the tee at the top of the water heater tank. Be sure to
install the 3/4 in. vent elbow and automatic air vent (2) at the high point of the line. The optional aquastat
can be installed in this line, a maximum of 6 feet from the furnace. This aquastat must close on rise in tem-
perature and must be hooked up to turn on the circulator when the water temperature reaches 120° f.
G.Aftersecuringallconnections,rellthetankwithwaterandthen,ONLYTHEN,turnonthepowertothe
water heater.