Maytag Goodman GM9C96 Service And Troubleshooting page 6

SYSTEM OPERATION
*M9C96 M INIMUM CLEARANCES TO COMBUSTIBLE M ATERIALS
POSITION*S IDES REAR
Upflow 0" 0"
Horizontal 6" 0"
*C9C96 M INIMUM CLEARANCES TO COMBUSTIBLE M ATERIALS
POSITION*S IDES REAR
Counterflow0 "0 "1
Horizontal 6" 0"
• C = If placed on combustible floor, floor MUST be wood only.
• NC = For installation on non-combustible floors only. A combustible
subbase must be used for installations on combustible flooring.
• For servicing or cleaning, a 24" front clearance is recommended.
• Unit connections (electrical, flue, and drain) may necessitate greater
clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over from
the enclosure where accessibility clearances are greater.
• Approved for line contact in the horizontal position.
Thermostat Requirements
A two stage heat/cool thermostat is recommended. A single
stage heating thermostat may be used. It is recommended
that a high quality thermostat with a "C" terminal is used to
operate the furnace.
Thermostat Location
In an area having good air circulation, locate the thermostat
about five feet high on a vibration-free inside wall. Do not
install the thermostat where it may be influenced by any of
the following:
• Drafts, or dead spots behind doors, in corners, or under
cabinets.
• Hot or cold air from registers.
• Radiant heat from the sun.
• Light fixtures or other appliances.
• Radiant heat from a fireplace.
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat and
dehumidistat, such as an outside wall.
COMBUSTION AND VENTILATION AIR
REQUIREMENTS
P
OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR
IF THE FURNACE IS NOT PROVIDED WITH ENOUGH FRESH AIR FOR PROPER
COMBUSTION AND VENTILATION OF FLUE GASES. MOST HOMES REQUIRE
OUTSIDE AIR BE SUPPLIED TO THE FURNACE AREA.
Improved construction and additional insulation in buildings
have reduced heat loss by reducing air infiltration and escape
around doors and windows. These changes have helped in
reducing heating/cooling costs but have created a problem
supplying combustion and ventilation air for gas fired and
other fuel burning appliances. Appliances that pull air out
6
FRONTB OTTOMF LUET
1" C0 "1
1" C0 "6
FRONTB OTTOMF LUET
"N C0 "
1" C0 "6
WARNING
of the house (clothes dryers, exhaust fans, fireplaces, etc.)
increase the problem by starving appliances for air.
When the furnace is installed as a direct ven (2-pipe) furnace,
OP
no special provisions for air for combustion are required.
"
However, if this furnace is to be installed in the same space
"
with other gas appliances, such as a water heater, ensure
there is an adequate supply of combustion and ventilation
air for the other appliances. Refer to the latest edition of the
National Fuel Gas Code NFPA 54/ANSI Z223.1 or CAN/
OP
CGA B149 Installation Codes, or applicable provisions of
the local building codes for determining the combustion air
"
requirements for the appliances.
Installation Positions
*M9C96 models may be installed up flow or horizontally with
left or right side down. *C9C96 models may be installed down
flow or horizontally with left or right side down. Do not install
any furnace on its back.
Horizontal Applications and Considerations
Horizontal applications, in particular, may dictate many of
the installation's specifics such as airflow direction, ductwork
connections, flue and/or combustion air pipe connections, etc.
The basic application of this furnace as a horizontal furnace
differs only slightly from an upright installation.
Horizontal Installations
1. Horizontal installations require 5.5" under the furnace to
accommodate the drain trap.
2. Horizontal furnaces must be installed with ¾" slope from
back to front to permit condensate flow towards the front
of the furnace.
When installing horizontally with the left side down, there
are two options for connecting the vent pipe to the furnace.
1. Venting may be connected to the furnace vent pipe fitting
on the original top (now the end) of the furnace
2. The internal vent pipe and elbow may be removed from
the furnace to permit the vent to exit the top (original side)
of the furnace. If this option is used, an RF000142 Vent-
Drain coupling must be used to keep condensate from
collecting in the inducer assembly
Refer to the following instructions and illustration.
R 000142 F
Insert flange. Cut 2 ½" long.
Figure 9