19
441 01 5003 01
Specifications are subject to change without notice
220V. 50Hz.
W
BK
G
Connection
Box
Ground
HOT
NEUT
.
Thermostat
Low Voltage
Terminal Board
R
G
G
Y
R
Y
W
W
C
Figure 17
Electrical Connections
NOTE: 220 VAC/50Hz/single--phase
Operating voltage range*: 242 max, 198 min.
* Permissible limits of voltage at which furnace will operate
satisfactorily
Furnace Control
The furnace control is preset at the factory with ON delay of 36
seconds in the heating mode. The blower OFF timing is preset at
168 seconds. If desired, the fan OFF delay can be reset to obtain
the longest delay times while still maintaining comfort levels. See
“Furnace Wiring Diagram”.
Furnace Control Fuse
The 24V circuit contains a 5--amp, automotive--type fuse located on
furnace control. (See
Figure 18
) Any electrical shorts of 24V wiring
during installation, service, or maintenance may cause fuse to blow.
If fuse replacement is required, use only a fuse of identical size (5
amp.).
Control Connections
Figure 18
FUSE
25--24--98
Diagnostic Light
Jumper
24 VAC
HUM
HUM
10. Ductwork and Filter
CARBON MONOXIDE POISONING HAZARD.
Failure to follow this warning could result in
personal injury or death.
Do NOT draw return air from inside a closet or utility
room where furnace is located. Return air duct
MUST be sealed to furnace casing.
!
FIRE HAZARD.
Failure to follow this warning could result in
personal injury, death and/or property damage.
Place furnace on noncombustible subbase on
downflow applications, unless installing on
non--combustible flooring.
!
WARNING
Duct Connections
This furnace may be installed in only a bottom or side return
application. Return air duct connection through the back of the
furnace is
NOT
allowed.
Upflow ONLY
: Side return--air duct connections can be made by
cutting out the embossed area shown in
Figure 19.
A plugged hole
is provided at each furnace side duct location to help start cutting
the opening. Side duct connections are NOT permitted in horizontal
flow applications.
Cut out Side Return Air Opening
Cut out
Starting
Hole
Figure 19
Upflow and Horizontal Flow:
Bottom return--air duct connections
can be made by removing the knockout panel in the furnace base.
Do
NOT
remove knock-out except for a bottom return--air duct
connection.
Duct Design
Design and install air distribution system to comply with Air
Conditioning Contractors of America manuals or other approved
methods that conform to local codes and good trade practices.
