25
FIGURE 20 INSTALL COMFORT CONTROL CENTER AND FORCED DRAFT BLOWER
THERMOCOUPLE WIRE
INSTALL ALL CONTROL
AND HANDLE KNOBS
KNOCKOUT IN DRAFT
CHANNEL REMOVED
FORCED DRAFT
BLOWER
COMFORT CONTROL CENTER
FAN/LIMIT CONTROL
SECURE CONDUIT WITH
CONDUIT CLAMPS AND
#10 SHEET METAL SCREW
PRE-WIRED FLEXIBLE CONDUIT
TO CIRCULATING BLOWER
5. Remove the knockout section of the draft channel
on model 526 by striking sharply with a hammer. Be
careful so you do not damage the mechanism inside
the channel and directly behind the knock-out. DO
NOT allow the knock-out to fall inside the draft chan-
nel.
6. Align the forced draft blower outlet flange over the
knockout and secure with three #10 sheet metal
screws.
7. Secure conduit to furnace side using conduit clamps
and #10 sheet metal screws.
INSTALL CIRCULATING BLOWER
The flanges on the circulating blower simply slide be-
hind the angle mounts welded to the rear of the fur-
nace. Slide in from the top side, figure 21.
INSTALL FILTER BOX
The filter boxis standard on Model 526. Installation in-
structions are included with Model 526 filter box.
1. The filter boxcan be installed with the filter on either
side. The access door will fit the opening either side
and the handle should face forward.
2. Find two factory shipped support angles. Force sup-
port angle sides without tabs into the groove of the
mounting strip on both rear sides of the furnace. Posi-
tion at correct height to accept filter box, figure 21.
3. With filter boxset against back of furnace, bend
down the tabs on the support angles so they lock be-
hind the flanges of the top and bottom panels of the
box.
4. Install the access door. Install filter not supplied and
install a cold air return system to the filter boxfilter
side opening.
5. Route flexible conduit from comfort control through
hole in top panel and to boxconnector on blower con-
nection box. Connect wires to blower motor by joining
wires of the same color.
FEED
MOTOR
White
White/Purple
Red
Red
Blue
Blue
Black
Black
