Version 1.04
March 2011
APEX cbt
Page 20
www.blazeking.com
THERMOSTATS
Your system uses two thermostats - one to control the wood add-on and one to control the alternate furnace.
The alternate (electric, gas or oil) thermostat must be interlocked to the limit switches provided on the wood
furnace plenum (see wiring diagrams). This is to prevent the alternate furnace from operating when the
plenum temperature rises above 150°F. Thermostats should be mounted side by side on an inside wall out of
direct sunlight or other heat sources.
ELECTRICAL GENERAL
All wiring on the Apex CBT shall be fastened to the outside of the insulated cabinet surfaces only. This is to
prevent overheating by direct contact with firebox components.
Electrical installation must be done by a qualified licensed electrician, experienced in control circuit wiring.
FAN LIMIT INSTALLATION
Drill 2 holes into the front of the plenum 18” above unit. Using the bracket provided, install the fan limit junction
box assembly onto the furnace warm air plenum. All wiring must be routed on the outside of the cabinet
surface. Installation of wiring must be by a qualified electrician. See instructions for wiring diagrams which
apply to your specific installation (page 23-26).
INSTALLATION INSTRUCTIONS
Fig. 19
3.50 in
3.50 in
Ø0.80 in (3x)
TEMPLATE FOR DRILLING HOLES—CUTOUT LINES
(2x)
