System Checkout; Unit Start-Up; Heat Recovery Package - Bosch TA025 Installation And Maintenance Manual

System Checkout

SYSTeM CHeCKouT
• After completing the installation, and before
energizing the unit, the following system checks
should be made:
• Verify that the supply voltage to the heat pump is
in accordance with the nameplate ratings.
• Make sure that all electrical connections are tight
and secure.
• Check the electrical fusing and wiring for the
correct size.
• Verify that the low voltage wiring between the
thermostat and the unit is correct.
• Verify that the water piping is complete and correct.
• Check that the water flow is correct, and adjust if
necessary.
• Check the blower for free rotation, and that it is
secured to the shaft.
• Verify that vibration isolation has been provided.
• Unit is serviceable. Be certain that all access
panels are secured in place.

unIT STArT-uP

1. Set the thermostat to the highest setting.
2. Set the thermostat system switch to "COOL ",
and the fan switch to the "AUTO" position. The
reversing valve solenoid should energize. The
compressor and fan should not run.
3. Reduce the thermostat setting approximately 5
degrees below the room temperature.
4. Verify the heat pump is operating in the cooling
mode.
5. Turn the thermostat system switch to the "OFF"
position. The unit should stop running and the
reversing valve should de energize.
6. Leave the unit off for approximately (5) minutes
to allow for system equalization.
7. Turn the thermostat to the lowest setting.
8. Set the thermostat switch to "HEAT".
9. Increase the thermostat setting approximately 5
degrees above the room temperature.
10. Verify the heat pump is operating in the heating
mode.
Revised 03-11
Caution
Subject to change without prior notice
11. Set the thermostat to maintain the desired space
temperature.
12. Check for vibrations, leaks, etc.

HeAT reCoVerY PACKAGe

The Heat Recovery package is a factory mounted
option. It consists of a forced pumped unit that em-
ploys a circulating pump to move water through a
double wall/vented heat exchanger and returns the
heated water to the water tank. The water is heated by
superheated refrigerant discharge gas from the
compressor. This waste heat of the cooling mode
captured by the heat recovery increases the capacity
and efficiency of the heat pump unit. If the air tempera-
ture is uncomfortable coming from the air vents in the
heating mode the heat recovery may need to be turned
off. In the heating mode the heat recovery captures
heat that would normally be used for space heating.
If heat recovery unit is installed in an area where
freezing may occur, the unit must be drained
during winter months to prevent heat exchanger
damage. Heat exchanger ruptures that occur due
to freezing will void the heat recovery package
warranty along with the heat pump warranty.
TYPICAl ConneCTIon PIPInG
WATer TAnK PrePArATIon:
1. Turn off electrical or fuel supply to the water heater.
2. Attach garden hose to water tank drain connection
and run other end of hose out doors or to an open
drain.
3. Close cold water inlet valve to water heater tank.
4. Drain tank by opening drain valve on the bottom
of the tank, then open pressure relief valve or hot
water faucet.
5. Once drained the tank should be flushed with
cold water until the water leaving the drain hose
is clear and free of sediment.
6. Close all valves and remove the drain hose.
7. Install HR water piping.
Hr WATer PIPInG:
All hot water piping should be a minimum of 3/8t
O.D. copper tube to a maximum distance of fifteen
(15) feet. For distances beyond fifteen feet but not
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TA Series