Step5-- MovetheRTUgasvalveon/offswitchtotheOFF
position.SeeFig.5forlocationofRTUgasvalve.
Two Stage Single Stage
RTU gas valve RTU gas valve
On/Off
Switch
On/Off
Switch
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Fig. 16 - Single- and Two-Stage Gas Valves
Step 6 -- Replace compressor access panel.
Fig. 17 - Compressor Access Panel
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Step 7 -- Remove disconnect lockout tag and restore power
to the unit by switching the RTU main disconnect to ON.
MAIN _F _
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Fig. 18 - RTU Main Disconnect - Electrical Supply
Step 8 -- If unit is being shut down because of a malfunction,
call your dealer as soon as possible. If unit is being shut down
because the heating season has ended, restore electrical
power to the unit and set thermostat/unit controller to the
COOL position to ensure operation of the cooling system
during the cooling season.
ROUTINE MAINTENANCE AND
CARE FOR THE EQUIPMENT
OWNER
While some maintenance can be performed by laymen,
most should be performed by skilled, experienced
personnel. Follow the recommended service maintenance
schedule, and modify it as necessary for your
application/environment. For instance, dusty areas may
require more frequent filter changes.
After performing any maintenance or service on the unit,
be sure all panels are securely fastened in place to prevent
rain from entering unit cabinet and to prevent disruption
of the correct unit airflow pattern.
FIRE AND EQUIPMENT DAMAGE HAZARD
Failure to follow this warning could result in personal
injury and damage to equipment.
Do not use this unit if any part has been under water.
hmnediately call a qualified service technician to
inspect the unit and to replace any part of the control
system and gas control that has been under water.
To ensure proper functioning of the unit, flow of
combustion and ventilating air must not be obstructed
from reaching the unit. Follow service and performance
clearances as listed in the product data.
Consider the following information before maintaining or
servicing equipment:
Indoor Air Filter(s)
FIRE AND EQUIPMENT DAMAGE HAZARD
Failure to follow this warning could result in personal
injury and damage to equipment.
Never operate unit without filters in place. The
accumulation of dirt, dust or lint on the internal parts
of your unit can cause fire or a loss of efficiency.
Damage to the blower motor and/or compressors
could also result.
Indoor air filter(s) should be checked every 3 or 4 weeks
(application dependant) and changed or cleaned when
necessary. See Fig. 19 for air filter access panel location.
• Lift up and remove air filter access panel.
• While holding filters, tilt upper filter rack.
• Remove filters by pulling up and out toward you from the
track.
• Inspect filters. Clean or replace as necessary.
• Follow direction of airflow arrows as noted on filter
frame when returning filters to rack.
• Reinstall air filter access panel.
AIR FILTER ACCESS PANEL
Fig. 19 - Air Filter Access Panel
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