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DUAL COMPRESSOR PACKAGED HEAT PUMP INSTALLATION GUIDE
Hot Water Generator Connections
To maximize the benefits of the hot water generator a mini-
mum 50-gallon water heater is recommended For higher
demand applications, use an 80-gallon water heater or two
50-gallon water heaters connected in a series as shown below.
Two tanks plumbed in a series is recommended to maximize
the hot water generator capability. Electric water heaters are
recommended. Make sure all local electrical and plumbing
codes are met for installing a hot water generator. Residential
units with hot water generators contain an internal circula-
tor and fittings. A water softener is recommended with hard
water (greater than 10 grains or 170 total hardness).
NOTES: 1) Using a preheat tank, as shown in Figure 12, will
maximize hot water generator capabilities. 2) The hot water
generator coil is constructed of vented double wall copper
suitable for potable water.
Water Tank Preparation
To install a unit with a hot water generator, follow these
installation guidelines.
1. Turn off the power to the water heater.
2. Attach a water hose to the water tank drain
connection and run the other end of the hose to an
open drain or outdoors.
3. Close the cold water inlet valve to the water heater tank.
4. Drain the tank by opening the valve on the bottom
of the tank, then open the pressure relief valve or hot
water faucet.
5. Flush the tank by opening the cold water inlet valve to
the water heater to free the tank of sediments. Close
when draining water is clear.
6. Disconnect the garden hose and remove the drain valve
from the water heater.
7. Refer to Plumbing Installation and Hot Water
Generator Startup.
CAUTION: Elements will burn out if energized dry.
Figure 11: Typical Hot Water Generator Installation
3/4" x 3/4" x 1/2" tee
Venting Waste
Valve or Vent
Coupling
HWG
W ater In
Figure 12: Hot Water Generator Installation In Preheat Tank
3/4" x 3/4"
Venting Waste Valve
x 1/2" tee
or Vent Coupling
Water Out
HWG
Water In
NOTE: This configuration maximizes hot water
generator capability.
14
Cold
Hot
Water In
Water Out
HWG
Water Out
P/T Relief
Valve
In
Drain Valve
Cold
Hot
Water In
Water Out
HWG
P/T Relief
P/T Relief
Valve
Valve
In
Drain Valve
Drain Valve
Storage
Electric Powered
Tank
Water Heater
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