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Inspect coils, clean if dirty or obstructed in any
way.
In case of excessive noise or unusual operation
check for reason and act accordingly.
Quarterly:
Check cooling coil drain pan and accessible conden-
sate pipes and “P” trap to assure proper drainage.
Clean if necessary.
Check operation of heating and cooling section if
seasonal.
Check the inlet and outlet air temperatures. Deter-
mine cause for abnormal changes and act accord-
ingly.
Check water pressure drop to determine water
flow, in case flow rate is out of range adjust water
flow with unit’s valves.
Annually:
Inspect and clean unit interior as necessary at the
beginning of cooling season mode.
Clean the drain line, “P” trap, and condensate pan.
Clean evaporator coil.
Clean the water to refrigerant heat exchanger.
Check refrigerant pressures and temperatures
every spring and correct unusual operation accord-
ingly.
Filters
When the heat pump circulates and filter the air in your
house, dust and dirt particles build up on the filter. Exces-
sive accumulation can block the airflow, forcing the unit to
work harder to maintain desired temperatures, thus costing
more. Check filter at least once a month and change as
needed with the same size filter. Filters on HPX heat pump
units are easy to change as they slide out of side of unit
easily. Replace old filters with the size indicated on each
filter or as shown in the specific unit data. Be sure arrows
on filter frames point toward the unit.
Blower Assembly
HPX water source heat pumps use forward curved blower
wheels that are non-overloading, very efficient and very
easy clean. Clean blower wheels are necessary to reduce
electrical use, maintain capacity and reduce stress on the
unit. The blower wheel and blower section need to be ins-
pected periodically, and cleaned of dust or debris. To ins-
pect and clean the blower, set thermostat to “OFF” position’
turn the electrical power to the unit to “OFF” position at the
disconnect switch. Clean the assembly, check for looseness,
check screws for tightness, rotate blower wheel while
listening close for noise or roughness.
Indoor Coils
Coils should be inspected and cleaned annually to ensure
there is no obstruction to airflow. Dirty evaporator coils
will eventually freeze up, and often result in time consum-
ing and expensive service call. Clean filters will help to pre-
vent dirt from accumulating on the evaporator; however
the evaporator should be cleaned annually with a soft
bristled brush and steam or a non-corrosive coil cleaning
solution. Move the brush in the fin direction. Make sure
coil fins are not flattened.
Water Heat Exchanger
The efficiency of the unit is dependent on the water to
refrigerant heat exchanger’s performance. Therefore, a
clean heat exchanger and a correct flow rate are impera-
tive for minimizing the cost of operation. In severe cases
dirty heat exchanger or flow rate out of range may cause
the unit to malfunction. Heat exchanger can be cleaned by
back flushing with or without the appropriate chemical
available at a refrigeration supply shop. To obtain the
correct flow rate adjust the water line valves.
NOTE
It is important to keep filters,
water heat exchanger, coil and
blower(s) clean.
Service
Before calling, the model and serial number of the unit will
need to be at hand for the warranty service department to
help answer questions regarding the unit.
Miami Heat
Pump’s
Phone:
866-407-8535
Fax:
866-406-6603
