ClimateMaster DC Series Installation Manual download pdf (Page 17)

Residential H&V - 60Hz R22 &R410A

Rev.: 22 Dec, 2008

climatemaster.com

Installation

The HWG high limit temperature switch is set at 125°F

[52°C] and is located on the HWG heat exchanger “Water In”

line. If the HWG is connected incorrectly or if circulation is

reversed, the aquastat will sense leaving water temperature

and prevent HWG operation. UNDER NO CIRCUMSTANCES

SHOULD THE LIMIT BE DISCONNECTED OR REMOVED!

Full load conditions could drive hot water tank temperatures

far above safe temperature levels if the aquastat has been

disconnected or removed.

The heat pump, water piping, pump, and hot water tank

should be located where the ambient temperature does

not fall below 50°F [10°C]. Keep water piping lengths at a

minimum. DO NOT use a one way length greater than 50 ft.

[15 m].

All installations must be in accordance with local codes. The

installer is responsible for knowing the local requirements,

and for performing the installation accordingly. DO NOT

connect the pump wiring until “Initial Start-Up” section,

below. Powering the pump before all installation steps are

completed may damage the pump.

Water Tank Preparation

1. Turn off power or fuel supply to the hot water tank.

2. Connect a hose to the drain valve on the water tank.

3. Shut off the cold water supply to the water tank.

4. Open the drain valve and open the pressure relief valve

or a hot water faucet to drain tank.

5. When using an existing tank, it should be ﬂ ushed with

cold water after it is drained until the water leaving the

drain hose is clear and free of sediment.

6. Close all valves and remove the drain hose.

7. Install HWG water piping.

HWG Water Piping

1. Using at least 5/8” [16mm] O.D. copper, route and

install the water piping, valves and air vent as shown in

Figures 14, 15, or 16. An appropriate method must be

employed to purge air from the HWG piping. This may

be accomplished by ﬂ ushing water through the HWG (as

In Figures 14 and 15) or by Installing an air vent at the

high point of the HWG piping system.

2. Insulate all HWG water piping with no less than 3/8”

[10mm] wall closed cell insulation.

3. Open both shut off valves and make sure the tank drain

valve is closed.

Water Tank Reﬁ ll

1. Close valve #4. Ensure that the HWG valves (valves #2

and #3) are open. Open the cold water supply (valve #1)

to ﬁ ll the tank through the HWG piping. This will purge air

from the HWG piping.

2. Open a hot water faucet to vent air from the system until

water ﬂ ows from faucet; turn off faucet. Open valve #4.

Depress the hot water tank pressure relief valve handle to

ensure that there is no air remaining in the tank.

4. Inspect all work for leaks.

Before restoring power or fuel supply to the water heater,

adjust the temperature setting on the tank thermostat(s)

to insure maximum utilization of the heat available from

the refrigeration system and conserve the most energy.

On tanks with both upper and lower elements and

thermostats, the lower element should be turned down

to 100°F [38°C] or the lowest setting; the upper element

should be adjusted to 120-130°F [49-54°C]. Depending

upon the speciﬁ c needs of the customer, you may want

to adjust the upper element differently. On tanks with a

single thermostat, a preheat tank should be used (Fig 15).

6. Replace access cover(s) and restore power or

fuel supply.

Initial Start-Up

1. Make sure all valves in the HWG water circuit are

fully open.

2. Turn on the heat pump and allow it to run for

10-15 minutes.

3. Turn the heat pump and heat pump power supply “OFF”

and CONNECT POWER TO THE HWG PUMP as shown

in the unit wiring diagram. Connect the pump power lead

as instructed on the tag attached to the pump wiring.

4. The HWG pump should not run if the compressor is not

running.

5. The temperature difference between the water entering

and leaving the HWG coil should be approximately

5-10°F [3-6°C].

6. Allow the unit to operate for 20 to 30 minutes to insure

that it is functioning properly.

Hot Water Generator

Section 10 - Packaged IOM 17 4/24/09 3:16:50 PM

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ClimateMaster DC Series Installation Manual Page 17

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