Friedrich HEAT PUMPS - Manual (Page 22)

22
920-087-04
J. Routine Maintenance
1. Clean the unit air intake fi lter at least every 300 to 350 hours
of operation. Clean the fi lters with a mild detergent in warm
water and allow to dry thoroughly before reinstalling.
2. The indoor coil (evaporator coil), the outdoor coil (condenser
coil) and base pan should be inspected periodically (yearly
or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper,
etc.). Clean the coils and base pan with a soft brush and
compressed air or vacuum. If using a pressure washer, be
careful not to bend the aluminium fi n pack. Use a sweeping
up and down motion in the direction of the vertical aluminum
fi n pack when pressure cleaning coils. Cover all electrical
components to protect them from water or spray.
Before reinstalling the chassis in the sleeve, inspect the
indoor blower housing, blower wheel, condenser fan blade,
and condenser shroud periodically (yearly or bi-yearly) and
clean of all debris (lint, dirt, mold, fungus, etc.) Clean the
blower housing area and blower wheel with an antibacterial
/ antifungal cleaner. Use a biodegradable cleaning agent
and degreaser on condenser fan and condenser shroud.
Use warm or cold water when rinsing these items. Allow
the unit to dry thoroughly, inspect all gasket material for
deterioration (replace as necessary), and then reinstall the
chassis in the sleeve.
NOTE: Do not use a caustic coil cleaning agent on coils
or base pan. Use a biodegradable cleaning agent and
degreaser.
NOTE: Units are to be inspected and ser viced by qual i fi ed service per son nel only.
Discharge Air Grille
Filters
Return Air
Grille
Front Cover
Evaporator Coil
Indoor Blower
Housing
Gasket
Condenser Shroud
Condenser Fan Blade
Indoor Blower
Innerwall
Basepan
Outdoor Grille
Wall Sleeve
Control Panel
Condenser Gasket
Compressor
3. Periodically (at least yearly or bi-yearly): inspect all control
components, both electrical and mechanical, as well as the
power supply. Use proper testing instruments (voltmeter,
ohmmeter, ammeter, wattmeter, etc.) to perform electrical
tests. Use an air conditioning or refrigeration thermometer
to check room, outdoor and coil operating temperatures.
Use a sling psychrometer to measure wet bulb temperatures
indoors and outdoors.
4. Inspect the surrounding area (inside and outside) to ensure
that the units' clearances have not been compromised or
altered.
5. Inspect the sleeve and drain system periodically (at least
yearly or bi-yearly) and clean of all obstructions and debris.
Clean both areas with an antibacterial and antifungal
cleaner. Rinse both items thoroughly with water and ensure
that the drain outlets are operating correctly. Check the
sealant around the sleeve and reseal areas as needed.
6. Clean the front cover when needed. Use a mild detergent.
Wash and rinse with warm water. Allow them to dry
thoroughly before reinstalling them in the chassis.
Components
Figure 16