5
TO SHUT UNIT OFF
See Fig. 1 for location of gas valve(s). Refer to Fig. 3 while
proceeding with the following steps.
1. Turn off the unit demand for cooling or heating by using
the scrolling marquee. The scrolling marquee is located in
the control box at the compressor end of the unit.
a. Push the
key until a blank display screen is
shown.
b. Push the
▼
key until the SERVICE TEST LED is lit.
c. Push the
key. The display will show STOP.
d. Push the
key again. The NO/YES display
will flash.
e. Push the
▲
or
▼
key to toggle the display to YES
and then push
. The unit will be locked off
from heating, cooling or any operation. The controls
will still function and the display will still operate.
2. Close the field-installed manual gas shutoff valve.
3. Turn off the electrical power to the unit using the optional
disconnect or the field-installed disconnect and lock off
using proper lockout and tag-out procedures.
4. Open the burner section hinged access door.
5. Move the switch on the gas valves to the OFF position and
wait 5 minutes before doing any service in the section or
on the piping.
6. Close the burner section hinged access door.
7. 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 reset the
scrolling marquee to Run mode to ensure operation of the
cooling system during the cooling season.
Do not use this unit if any part has been under water. Immedi-
ately 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.
Fig. 3 — To Shut Unit Off
WARNING
1. Do not turn off the electrical power to unit without first
turning off the gas supply.
2. Never attempt to manually light the main burners on unit
with a match, lighter, or any other flame. If the electric
sparking device fails to light the main burners, refer to
the following shutdown procedures. Call your dealer as
soon as possible.
Failure to follow these procedures can result in serious fire
or personal injury.
ESCAPE
ENTER
ENTER
IMPORTANT: Should overheating occur or the gas supply
fail to shut off, shut off the manual gas valve to the unit before
shutting off the electrical supply.
ENTER
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
Alarm Status
ENTER
MODE
ESCAPE
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
STEP 7
ON
MAIN
OFF
LOCK-OUT
TAG
ON
MAIN
OFF
