6 720 220 045
Revised 05-12 Subject to change without prior notice
15
CP/BP Series
Water piping exposed to extreme low ambient
temperatures is subject to freezing.
Pressure/temperature ports are recommended in both
supply and return lines for system ow balancing. Water
ow can be accurately set by measuring the water-to-
refrigerant heat exchangers water side pressure drop.
See specication sheets for water ow vs. pressure
drop information in the back of this manual.
EARTH COUPLED SYSTEMS
Closed loop and pond applications require
specialized design knowledge. No attempt at these
installations should be made unless the dealer has
received specialized training. Utilizing Bosch’s
Ground Loop Pumping Package (GLP), makes the
installation easy. Anti-freeze solutions are utilized
when low operating conditions are expected to
occur. Refer to the GLP installation manuals for
more specic instructions. A wrapped water coil
option is required for this application.
System Checkout
After completing the installation, and before
energizing the unit, the following system checks
should be made prior to initial startup:
• 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 ow 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
• Verify that the blower support has been removed
UEarth Coupled System
• Verify that duct work has been properly fastened
to supply and return duct collars
• Make sure return air lters are positioned correctly
in the lter rack if removed during installation
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-energized
6. Leave the unit off for approximately (5) minutes
to allow for system equalization.
7. Turn the thermostat to the lowest setting. The
compressor and fan should not run.
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.
11. Set the thermostat to maintain the desired
space temperature.
12. Check for vibrations, leaks, etc...
13. Instruct the owner on the unit and thermostat
operation
HEAT RECOVERY PACKAGE
The Heat Recovery package is a factory mounted
option. It consists of a forced pumped unit that
employs 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 efciency of the heat pump unit. If the air
temperature is uncomfortable coming from the air
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