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IM 934-5
Equipment Protection From The
Environment
The metal parts of this unit may be subject to rust or dete-
rioration in adverse environmental conditions. This oxida-
tion could shorten the equipment’s useful life. Salt spray,
fog or mist in seacoast areas, sulphur or chlorine from lawn
watering systems, and various chemical contaminants from
industries such as paper mills and petroleum refineries are
especially corrosive.
If the unit is to be installed in an area where contami-
nants are likely to be a problem, special attention should
be given to the equipment location and exposure.
1. Avoid having lawn sprinkler heads spray directly in or on
the outdoor louver.
2. In coastal areas, the units must have the corrosion
protection package to maintain the warranty coverage.
Regular maintenance will reduce the buildup of contami-
nants and help to protect the outdoor section of the unit.
1. Frequent washing of the outdoor section, condenser fan
blade and condenser coil with fresh water will remove
most of the salt or other contaminants that build up in the
outdoor section of the unit
2. Regular cleaning of the cabinet with a good non-abrasive
polish will provide protection and keep it in good
condition.
3. A mild liquid cleaner may be used several times a year to
remove matter that will not wash off with water.
The best protection is frequent cleaning, maintenance
and minimal exposure to contaminant.
Maintenance (Scheduled)
Incremental conditioners are built to last. With proper care,
the unit should provide uninterrupted service for many years.
Scheduled maintenance of this equipment as described be-
low, is the key to the equipment’s longevity.
A. Air filters must be cleaned at regular intervals. Twice
annually may be adequate in some areas while twice
monthly may be required in others. Areas with high
dirt and lint content or heavy usage of units require
more frequent filter maintenance than those areas of
relatively clean operating or low usage conditions. Unit
malfunction will occur if air filters are not kept clean.
Rinse filter with hot water and a mild detergent.
B. Daikin McQuay recommends that every year the chassis
be removed for a thorough checkup. This should be
completed as follows:
1. Unplug unit from power source.
2. Remove front panel.
3. Remove chassis from cabinet and move it to the
maintenance department. Replace with spare chassis or
weather plate.
4. Check all seals and insulation and repair as required.
5. Check all wiring and controls for hazardous conditions.
6. Thoroughly clean discharge grilles.
7. Cover motors and control module with water tight
material and wash evaporator coil, condenser coil and
base pan using hot water and a mild soap.
Residential and institutional cleaning compounds can cause
permanent damage to the packaged terminal unit. To avoid
damage to unit controls and heat transfer surfaces, do not
spray cleaning compounds onto the discharge grille, return
air opening, or unit controls. Normal cleaning can be accom
-
plished by wiping the unit surface with a damp cloth. When
using cleaning compounds on carpets, floors or walls, turn the
unit off to avoid drawing potentially damaging vapors into the
package terminal unit.
CAUTION
8. Check condensate removal system and assure proper
operation. Pour at least two (2) cups of water into
evaporator drain pan and verify proper operation. Clean
condensate drain and clear weep holes located at the
bottom rear of wall sleeve.
9. Dry equipment thoroughly, especially electric parts and
installation.
10. Clean any rust spots with steel wool and paint with rust
inhibiting paint.
11. Clean insulation or replace if necessary.
12. Check insulation on refrigeration piping and replace if
necessary.
13. Check all fasteners and tighten as required.
14. Clean and oil damper door and linkage.
15. Test run chassis before reinstalling.
Summary of Contents for McQuay IM 934-5
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