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ECO-Y INSTALLATION MANUAL
Plumbing Installation
1. Inspect the dip tube in the water heater cold inlet for a check
valve. If a check valve is present it must be removed or
damage to the hot water generator circulator will occur.
2. Remove drain valve and fitting.
3. Thread the 3/4 in. NPT x 3-1/2 in. brass nipple into the water
heater drain port.
4. Attach the center port of the 3/4 in. FPT tee to the opposite end
of the brass nipple.
5. Attach the 1/2 in. copper to 3/4 in. NPT adaptor to the side of
the tee closest to the unit.
6. Install the drain valve on the tee opposite the adaptor.
7. Run interconnecting tubing from the tee to HWG water out.
8. Cut the cold water “IN” line going to the water heater.
9. Insert the reducing solder tee in line with cold water “IN” line as
shown.
10. Run interconnecting copper tubing between the unit HWG
water “IN” and the tee (1/2 in. nominal). The recommended
maximum distance is 50 ft.
11. To prevent air entrapment in the system, install a vent coupling
at the highest point of the interconnecting lines.
12. Insulate all exposed surfaces of both connecting water lines
with 3/8 in. wall closed cell insulation.
NOTE:
All plumbing and piping connections must comply with local
plumbing codes.
CAUTION: Never operate the HWG circulating pump
while dry . If the unit is placed in operation before
the hot water generator piping is connected, be
sure that the pump wires are disconnected from the
contactor .
Hot Water Generator Connections cont.
Hot Water Generator Startup
1. Make sure the power is off to the heat pump. Connect the blue
wire from the hot water generator pump to T1 on the contactor
(unit ships with this wire disconnected). The hot water
generator pump will not operate until this wire is connected to
the contactor.
2. Close the drain valve to the water heater.
3. Open the cold water supply to the tank.
4. Open a hot water faucet in the building to bleed air from the
system. Close when full.
5. Open the pressure relief valve to bleed any remaining air from
the tank, then close.
6. If so equipped, turn the venting (burping) screw in the center
of the pump two (2) turns open (water will drip out), wait until
all air is purged from the pump, then tighten the plug. Use vent
couplings to bleed air from the lines.
7. Carefully inspect all plumbing for water leaks and correct as
required.
8. Before restoring electrical supply to the water heater, adjust the
temperature setting on the tank.
•
On tanks with both upper and lower elements, the lower
element should be turned down to the lowest setting,
approximately 100°F. The upper element should be
adjusted to 120°F to 130°F. Depending upon the specific
needs of the customer, you may want to adjust the upper
element differently.
•
On tanks with a single element, lower the thermostat
setting to 120°F.
9. After the thermostat(s) is adjusted, replace the access cover
and restore electrical supply to the water heater.
10. Make sure that any valves in the hot water generator circuit are
open.
11. Turn on the unit to heating.
12. The HWG pump should be running. When the pump is first
started, turn the venting (burping) screw (if equipped) in the
center of the pump two (2) turns open until water dribbles out,
then replace. Allow the pump to run for at least five minutes to
ensure that water has filled the circulator properly.
13. The temperature difference between the water entering
and leaving the hot water generator should be 5°F to 15°F.
The water flow should be approximately 0.4 GPM per ton of
nominal cooling.
14. Allow the unit to heat water for 15 to 20 minutes to be sure
operation is normal.