Valley Comfort Systems MP80 Operation & Installation Manual page 20

MP80
Page 20
INSTALLATION INSTRUCTIONS cont.
INDEPENDENT WOOD FURNACE
When installed with a blower cabinet mounted on either side, the MP80 becomes an
INDEPENDENT wood only furnace. Th e blower must have a minimum 900 cfm. capacity (1/3 hp.). In this
confi guration the interlock limit is not used. Figure 23 shows the electrical connections.
Fig. 23 ELECTRICAL CONNECTIONS INDEPENDENT WOOD
When installing in a stand-alone confi guration with an add-on blower only 2 out of the three
limit switches are used. The middle limit is the Operating Limit and the right limit switch is the
Safety Limit. The left limit is only for use with an alternate furnace.
NOTE: SPECIAL RETURN AIR CONSIDERATIONS MUST BE TAKEN INTO ACCOUNT FOR
WOOD ONLY INSTALLATIONS AS PER "B-365" (ALL RETURN AIR DUCT MUST BE METAL
ONLY)
OM-MP80 E V1.15 January 29, 2015