![background image](http://html1.mh-extra.com/html/york/single-package-dual-fuel-heat-pump/single-package-dual-fuel-heat-pump_user-manual_4171299004.webp)
858539-YUM-A-0512
4
Unitary Products Group
or attempted repair may result
in a fire or explosion.
C. Do not use this appliance if any
part has been under water.
Immediately call a qualified
service technician to inspect
the appliance and to replace
any part of the control system
and any gas control which has
been under water.
START-UP INSTRUCTIONS
- HEATING SYSTEM
NOTE:
See General instructions for
Start-up and Shutdown of
your gas heating system.
1. STOP! Read the safety informa-
tion.
2. Set the thermostat to the lowest
setting.
3. Make sure all electrical power to
the equipment is “OFF”.
4. This appliance has a device
which automatically lights the
pilot and in turn, lights the burn-
ers.
5. Remove burner access panel
by removing screws and lifting
panel out.
6. Push the manual gas switch to
the “OFF” position.
7. Wait five (5) minutes to clear out
any gas. If you then smell gas,
STOP! Follow step A in the
safety information. If you don't
smell gas, go to next step.
8. Push the manual gas switch to
the ON position.
9. Replace the control access
panel.
10.Turn on all electrical power to
the appliance.
11. Set the thermostat to the
desired setting.
12.If the appliance will not operate,
follow the instruction “To Turn
OFF Gas To Application” and
call your service technician or
gas supplier.
SHUTDOWN INSTRUCTION
- TO TURN OFF GAS TO
APPLIANCE
1. Set the thermostat to the lowest
setting.
2. Turn off all electrical power to the
appliance if service is to be per-
formed.
3. Remove burner access panel by
removing screws and lifting
panel out.
4. Turn the manual gas switch to
the “OFF” position.
5. Replace the control access
panel.
SECURE OWNER’S APPROVAL
When the system is functioning
properly, secure the owner’s
approval. Show the owner the loca-
tion of all disconnect switches and
the thermostat. Teach owner how
to start and stop the unit and how
to adjust temperature settings
within the limitations of the system.
Advise owner that the flue exhaust
hood surface and the immediate
area will experience high tempera-
tures during a gas heating cycle.
All unauthorized personnel and
debris must be kept away from this
area.
Should overheating occur,
or the gas supply fail to
shut off, shut off the man-
ual gas valve to the equip-
ment before shutting off
the electrical supply.
Manual
Gas
Switch
ELECTRICAL SHOCK,
FIRE OR EXPLOSION
HAZARD
Failure to follow safety
warnings exactly could
result in dangerous opera-
tion, serious injury, death
or property damage.
Improper servicing could
result in dangerous opera-
tion, serious injury, death
or property damage.
• Before servicing, discon-
nect all electrical power to
unit.
• When servicing controls,
label all wires prior to dis-
connecting. Reconnect
wires correctly.
• Verify proper operation
after servicing.
!
WARNING