W415-1112 / 06.12.12
20
INSTALLATION OF "ADD-ON" CONFIgURATION REqUIRES FIELD WIRINg BY A CERTIFIED ELEC-
TRICIAN. ALL WIRINg TO CONFORM TO CSA 22.1.
install wood limit switch:
• locate and drill a 7/8" hole in the side of the plenum on the same side as the location of the
CHmf150/200 main wire harness, as illustrated.
LEFT HAND RETURN AIR CONFIgURATION
22"
12” (305 mm)(CHMF150)
16” (406 mm)(CHMF200)
1
1
2
2
24” (610 mm) (CHMF150)
31” (787 mm) (CHMF200)
(559 mm)
(165 mm)
3
6½”
3
22"
1
1
2
2
24” (610 mm)(CHMF150)
31” (787 mm)(CHMF200)
12” (305 mm)(CHMF150)
16” (406 mm)(CHMF200)
(165 mm)
3
6½”
3
RIgHT HAND RETURN AIR CONFIgURATION
• locate the wood limit switch bracket on the
furnace top, next to the plenum by lining
up the clearance holes in the lower switch
bracket and the pilot holes in the furnace top
(secure with hex head screws).
• Secure the top flange of the switch mounting
bracket by fastening with 2 hex head self
drilling screws into the supply plenum.
• Secure the wood limit switch onto the switch
mounting bracket using 4 hex head wildrill
screws.
• Secure the flex conduit connector on loose
end of the wood limit wire harness to the
access hole on bottom of the wood limit
switch connection box using the lock nut from
within the box.
• Connect the wires from the wood limit wire
harness to the wood limit terminals as per the
diagram.
9
4
2
jUMpER
WIRE
5
