System Checkout; Unit Start-Up; Maintenance - Bosch LM024 Installation, Operation And Maintenance Manual

LM Series Heat Pump

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 deenergize.
6. Leave the unit off for approximately (5)
minutes to allow for system equalization.
7. Turn the thermostat to the lowest setting.Set
the thermostat switch to "HEAT".
8. Increase the thermostat setting approximately
5 degrees above the room temperature.
9. Verify the heat pump is operating in the heating
mode.
10. Set the thermostat to maintain the desired
space temperature.
11. Check for vibrations, leaks, etc...
Revised 01-14

MAINTENANCE

1. Filter changes or cleanings are required at
regular intervals. The time period between
filter changes will depend upon type of
environment the equipment is used in. In a
single family home, that is not under
construction, changing or cleaning the filter
every 60 days is sufficient. In other
applications such as motels, where daily
vacuuming produces a large amount of lint,
filter changes may be need to be as frequent as
biweekly.
WARNING: Equipment should never be
used during construction due to likelihood
of wall board dust accumulation in the air
coil of the equipment which permanently
affects the performance and may shorten
the life of the equipment.
2. An annual "checkup" is recommended by a
licensed refrigeration mechanic. Recording the
performance measurements of volts, amps,
and water temperature differences (both
heating and cooling) is recommended. This
data should be compared to the information on
the unit's data plate and the data taken at the
original startup of the equipment.
3. Lubrication of the blower motor is not
required, however may be performed on some
motors to extend motor life. Use SAE-20 non-
detergent electric motor oil.
4. The condensate drain should be checked
annually by cleaning and flushing to insure
proper drainage.
SYSTEM CHECKOUT | 17
8 733 920 847 (2014/01)