Bosch SAE-20 User Manual

MAINTENANCE

1. Filter changes or cleaning 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 need to be as frequent as
biweekly.

NOTE: 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 non­detergent electric motor oil.

4. The condensate drain should be checked
annually by cleaning and flushing to insure
proper drainage.

5. Periodic lockouts almost always are caused by
air or water flow problems. The lockout
(shutdown) of the unit is a normal protective
measure in the design of the equipment. If
continual lockouts occur call a mechanic
immediately and have them check for: water
flow problems, water temperature problems,
air flow problems or air temperature problems.
Use of the pressure and temperature charts for
the unit may be required to properly determine
the cause.

Maintenance | 49SM Series Heat Pump

6 720 220 406 (2015/02)Revised 02-15