Hardy H3, Инструкция по установке и эксплуатации

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HARDY MANUFACTURING CO., INC (MODEL H3, H5, & H6) PAGE 22
SECTION V
PLUMBING OPTIONS FOR DOMESTIC HOT WATER
5-1 Option 1 – Plate Heat Exchanger for Domestic Hot Water
located at Hot Water Heater
To use this option it is recommended to bypass the relay and allow the circulator pump on
the heater to run continuously. To do this, first unplug the power cord going to the pump,
remove the wires of this cord from the relay terminals. Hook these two wires together using
a wire nut. Then when all plumbing changes have been made, plug pump cord back into
GFCI receptacle.
If your heating system needs to be bypassed you can install manual valves or install a
three way zone valve into the heater water supply going to the heating system (see
plumbing diagram). Install a tee into the supply line from the pump. One side of this tee will
go straight to the heating system, the other side will go to the unit port of the zone valve.
The main port of the zone valve will go to one side of the plate heat exchanger. The other
port on the same side of the plate heat exchanger will go back to the return port of the
heater.
The domestic water hooks up on the opposite side of the plate heat exchanger. The
direction of domestic water flow must be reserved from that of the heater water flow. The
cold water supply will go into the port opposite the return port, and water back to the hot
water heater will connect to the port opposite the line from the zone valve.
The use of bypass valves on both sides of the plate heat exchanger aids in maintenance
and cleaning of plate heat exchanger.