![background image](http://html1.mh-extra.com/html/carrier/pg80msu/pg80msu_installation-start-up-operating-and-service-and-maintenance-instructions_2563007004.webp)
PG80MSU: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
INTRODUCTION
A220905
Fig. 2 – Clearances to Combustibles
A02097
Fig. 3 – Multipoise Orientations
This 4-way multipoise Category I fan-assisted furnace is CSA
design-certified. A Category I fan-assisted furnace is an appliance
equipped with an integral mechanical means to either draw or force
products of combustion through the combustion chamber and/or heat
exchanger. The furnace is factory-shipped for use with natural gas.
This furnace is not approved for installation in mobile homes,
recreational vehicles, or outdoors. The furnace is not permitted to be
used for heating of buildings under construction. This furnace is
designed for minimum continuous return-air temperature of 60°F
(16°C)db or intermittent operation down to 55°F (13°C) db such as when
used with a night setback thermostat. Return-air temperature must not
exceed 80°F (27°C) db. Failure to follow these return-air temperature
limits may affect reliability of heat exchangers, motors, and controls, see
.
For accessory installation details, refer to the applicable instruction
literature.
NOTE:
Remove all shipping brackets and materials before operating the
furnace.
A221115
Fig. 4 – Return Air Temperature
A02054
Fig. 5 – Prohibit Installation on Back
A93044
Fig. 6 – Installation in a Garage
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
Do not install the furnace on its back or hang furnace with control
compartment facing downward. Safety control operation will be
adversely affected. Never connect return-air ducts to the back of the
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
When the furnace is installed in a residential garage, the burners and
ignition sources must be located at least 18 inches above the floor, see
. The furnace must be located or protected to avoid damage by
vehicles. When the furnace is installed in a public garage, airplane
hangar, or other building having a hazardous atmosphere, the furnace
must be installed in accordance with the NFGC.