Scheduled Maintenance - Daikin DBG Series Service Instructions Manual

SCHEDULED MAINTENANCE

5. Be sure the Owner is instructed on the unit operation,
filter, servicing, correct thermostat operation, etc.
MAINTENANCE
HIGH VOLTAGE !
D
ISCONNECT ALL POWER BEFORE SERVICING OR
. M
INSTALLING THIS UNIT ULTIPLE POWER SOURCES MAY
. F
BE PRESENT AILURE TO DO SO MAY CAUSE PROPERTY
,
DAMAGE PERSONAL INJURY OR DEATH
T
O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER
,
INSTALLATION ADJUSTMENT
. F
REFER TO THIS MANUAL OR ADDITIONAL ASSISTANCE OR
,
INFORMATION CONSULT A QUALIFIED INSTALLER
.
THE GAS SUPPLIER
S ,
HEET METAL PARTS SCREWS
,
HAVE SHARP EDGES AND IT IS NECESSARY THAT THE INSTALLER AND
SERVICE PERSONNEL EXERCISE CAUTION
Preventive maintenance is the best way to avoid unnecessary
expense and inconvenience. Have this system inspected at
regular intervals by qualified service personnel, at least twice
a year. Routine maintenance should cover the following items:
1. Tighten all belts, set screws, and wire connections.
2. Clean evaporator and condenser coils mechanically or
with cold water, if necessary. Usually any fouling is only
matted on the entering air face of the coil and can be
removed by brushing.
3. Lubricate motor bearings.
4. Align or replace belts as needed.
5. Replace filters as needed (see below).
6. Check for blockage of condensate drain.
7. Check power and control voltages.
8. Check running amperage.
9. Check operating temperatures and pressures.
10. Check and adjust temperature and pressure controls.
11. Check and adjust damper linkages.
12. Check operation of all safety controls.
13. Examine gas furnaces (see below and the User's Infor-
mation Manual).
14. Check condenser fans and tighten set screws.
20
WARNING
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WARNING
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ALTERATION SERVICE OR MAINTENANCE
,
SERVICE AGENCY OR
CAUTION
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CLIPS AND SIMILAR ITEMS INHERENTLY
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Filters
T
O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT
EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP
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ON INTERNAL PARTS NEVER OPERATE UNIT WITHOUT AN AIR FILTER
INSTALLED IN THE RETURN AIR SYSTEM
Every application may require a different frequency of replace-
ment of dirty filters. Filters must be replaced at least every
three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate heating
or cooling performance. Filter inspection should be made at
least every two months; more often if necessary because of
local conditions and usage.
Dirty throwaway filters should be discarded and replaced with
,
a new, clean filter.
Disposable return air filters are supplied with this unit. See the
unit Specification Sheet for the correct size and part number.
To remove the filters, remove the filter access panel on return
side of the unit.
Cabinet Finish Maintenance
Use a fine grade automotive wax on the cabinet finish to main-
tain the finish's original high luster. This is especially important
in installations with extended periods of direct sunlight.
Condenser and Induced Draft Motors
Bearings on the condenser fan motors and the combustion
fan motor are permanently lubricated. No additional oiling is
required.
Lubrication
The fan shaft bearings and the supply fan motor have grease
fittings that should be lubricated during normal maintenance
checks.
Clean Outside Coil (Qualified Servicer Only)
The coil with the outside air flowing over it should be inspected
annually and cleaned as frequently as necessary to keep the
finned areas free of lint, hair and debris.
Flame Sensor (Qualified Servicer Only)
A drop in the flame current can be caused by a nearly invisi-
ble coating on the flame sensor. This coating, created by the
fuel or combustion air supply, can be removed by carefully
cleaning the flame sensor with steel wool.
NOTE: After cleaning, the microamp signal should be stable
and in the range of 4 - 6 microamps DC.
Flue Passages (Qualified Servicer Only)
At the start of each heating season, inspect and, if necessary,
clean the unit flue passage.
CAUTION
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