6
Use in Mobile Homes
Models from 10 kW to 20 kW are certified for “L”-shape and “T”-
shape shallow duct installation with model FSB-1 sub-base in
downflow applications when the supply air ducts pass through
the floor of the structure. Recommended size of a floor opening:
14¼” x 14¼” (362 mm x 362 mm). The duct system must be
designed so that the external static pressure of the system does
not exceed the maximum external static pressure of 0.50” W.C.
(125 Pa).
SHALLOW DUCT AREA REQUIREMENTS
D
UCT
D
EPTH
D
UCT
W
IDTH
4" (102 mm)
16" (406 mm)
5" (127 mm)
13" (330 mm)
6" (152 mm)
10" (254 mm)
7
Using Optional Equipment
7.1
Two-Stage or Outdoor Thermostat
The
SEASON SELECT
switch must be in the M
ILD
position.
These controls can be used on all furnaces except 10 kW
model.
Follow the directions supplied with the two-stage or outdoor
thermostat in conjunction with the furnace wiring diagram.
When used, the furnace stage will supply heat as follows in
the opposite chart:
Model
First Stage
Second Stage
10 kW
10 kW
–
15 kW
10 kW
5 kW
18 kW
9 kW
9 kW
20 kW
10 kW
10 kW
25 kW
15 kW
10 kW
7.2
Air Conditioning
Your furnace is equipped with all the controls required for the
addition of air conditioning (except the heat-cool thermostat).
The evaporator coil may be installed by a local contractor in
sheet metal plenum of his own manufacture. The coil should be
located: centred over the “chimney” of the furnace 4” (102 mm)
to 6” (152 mm) above the top of the furnace.
Make sure no air is allowed to bypass the cooling coil during
cooling operation. If the discharge opening is a great deal larger
than the coil, and the ductwork is correspondingly larger than
the coil, you may want to use a bypass damper for heating.
The damper would be closed in summer, directing all air flow
through the coil. In winter the damper would be open to allow
air to bypass the coil.
Typical air-conditioning field wiring connections are shown in
the diagram at right.
WIRING COLOR CODE
C
G
R
W1
W2
Y
COMMON GREEN RED WHITE WHITE (BLUE) YELLOW
7
