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Table 13.
Belt tension measurement and deflection
Deflection Force (Lbs.)
Belts
Small
Cross
P.D
Super
Section
Range
Gripbelts
Min.
Max. Min.
3.0 - 3.6
3
4 1/2 3 7/8
A
3.8 - 4.8
3 1/2
5
5.0 - 7.0
4
5 1/2 5
3.4 - 4.2
4
5 1/2 5 3/4
B
4.4 - 5.6
5 1/8
7 1/8 6 1/2
5.8 - 8.8
6 3/8
8 3/4 7 3/8
Monthly Maintenance
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
Before completing the following checks, turn the unit OFF
and lock the main power disconnect switch open.
Filters
Inspect the return air filters. Clean or replace them if
necessary. If included, leave filter removal tool in unit.
Refer to the unit Service Facts for filter information.
Return Air Smoke Detector Maintenance
Airflow through the unit is affected by the amount of dirt
and debris accumulated on the indoor coil and filters.To
insure that airflow through the unit is adequate for proper
sampling by the return air smoke detector, complete
adherence to the maintenance procedures, including
recommended intervals between filter changes, and coil
cleaning is required.
Periodic checks and maintenance procedures must be
performed on the smoke detector to insure that it will
function properly. For detailed instructions concerning
these checks and procedures, refer to the appropriate
section(s) of the smoke detector Installation and
Maintenance Instructions provided with the literature
package for this unit.
Condensate Overflow Switch
During maintenance, the switch float (black ring) must be
checked to ensure free movement up and down.
RT-SVX21P-EN
Steel Cable
Gripnotch
Gripbelts
Max.
Min.
Max
5 1/2
3 1/4
4
4 1/2
6 1/4
3 3/4
4 3/4
6 7/8
4 1/4
5 1/4
8
4 1/2
5 1/2
9 1/8
5 3/4
7 1/4
10 1/8 7
8 3/4
Cooling Season
•
Check the unit's drain pans and condensate piping to
ensure that there are no blockages.
•
Inspect the evaporator and condenser coils for dirt,
bent fins, etc. If the coils appear dirty, clean them
according to the instructions described in "Coil
Cleaning" later in this section.
•
Manually rotate the condenser fan(s) to ensure free
movement and check motor bearings for wear. Verify
that all of the fan mounting hardware is tight.
•
Inspect the F/A-R/A damper hinges and pins to ensure
that all moving parts are securely mounted. Keep the
blades clean as necessary.
•
Verify that all damper linkages move freely; lubricate
with white grease, if necessary.
•
Check supply fan motor bearings; repair or replace the
motor as necessary.
•
Check the fan shaft bearings for wear. Replace the
bearings as necessary.
•
Check the supply fan belt. If the belt is frayed or worn,
replace it. Refer to the "Fan Belt Adjustment" section
for belt replacement and adjustments.
•
Verify that all wire terminal connections are tight.
•
Remove any corrosion present on the exterior surfaces
of the unit and repaint these areas.
•
Generally inspect the unit for unusual conditions (e.g.,
loose access panels, leaking piping connections, etc.)
•
Make sure that all retaining screws are reinstalled in
the unit access panels once these checks are complete.
•
With the unit running, check and record the: ambient
temperature; compressor suction and discharge
pressures (each circuit); superheat (each circuit);
•
Record this data on an "operator's maintenance log"
like the one shown in
pressures indicate a refrigerant shortage, measure the
system superheat. For guidelines, refer to the
"Compressor Start-Up" section.
Important: Do not release refrigerant to the
atmosphere! If adding or removing
refrigerant is required, the service
technician must comply with all federal,
state and local laws.
Heating Season
•
Inspect the unit's air filters. If necessary, clean or
replace them.
•
Check supply fan motor bearings; repair or replace the
motor as necessary.
•
Inspect both the main unit control panel and heat
section control box for loose electrical components
and terminal connections, as well as damaged wire
insulation. Make any necessary repairs.
Maintenance
Table 14, p.
59. If the operating
57
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