Maintenance; Water Side Pressure Drop In Psig - Bosch LM Split CS Series Installation, Operation And Maintenance Manual

36 | Maintenance

MAINTENANCE
DANGER: ELECTRICAL HAZARD
Before performing service or maintenance
operations on the system, turn off the main
power to the unit. Electrical shock will
cause personal injury or death.
Filter changes or cleanings are required at regular
intervals. The time period between filter changes
will depend upon type of environment in which the
equipment is used. 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.
NOTICE: 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.
An annual "checkup" by a trained and qualified
HVAC mechanic is required. Record the
performance measurements of volts, amps, and
water temperature differences for both heating
and cooling. 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.
Lubrication of the blower motor is not required;
however, it may be performed on some motors to
extend motor life. Use a SAE-20 non-detergent
electric motor oil.
Check the condensate drain annually by cleaning
and flushing to ensure proper drainage.
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, airflow problems or air
temperature problems. Use of the pressure and
temperature charts for the unit may be required to
properly determine the cause.
8733827906 (2021/11)

Water Side Pressure Drop in PSIG

Series
LM024
LM036
LM048
LM060
Table 21 Water Side Pressure Drop in PSIG
Subject to change without prior notice
LM Split CS Series Heat Pump
GPM Water PD @
77°EWT
with Water
3 0.7
4 1.2
5 1.7
6 2.4
7 3.2
8 4.0
6 1.1
8 1.8
10 2.7
12 3.7
14 4.9
16 6.2
6 1.1
8 1.8
10 2.7
12 3.7
14 4.9
16 6.2
7.5 1.1
10 1.9
12.5 2.8
15 3.9
17.5 5.2
20 6.6
LM Split CS Series Heat Pump