Installation Guide
www.usaprocom.com
200068-01A16
INSTALLATION
Figure 18 - Wiring Diagram
ELECTRICAL WIRING (MILLIVOLT)
 CAUTION: Label all wires prior to disconnection when servicing 
controls. Wiring errors can cause improper and dangerous opera-
tion. Verify proper operation after servicing.
Note: The millivolt valve is a self-powered combination gas control that does not require 
110 VAC to operate.
CONNECTING REMOTE RECEIVER
MODELS WZ(N,L)(18,24,30)MVA ONLY
Models WZ(N,L)(18,24,30)MVA can be connected to an aftermarket hand held remote receiver 
(not supplied by ProCom Heating, Inc.)
Refer to the remote receiver manufacturer's installation Instructions and the Wiring Diagram 
shown in Figure 18 for proper connection and use.
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB
For masonry and factory-built metal replace
Optional Wall Switch 
or Remote Receiver
If  your  log  set  cycles  to  pilot,  but  the  room 
temperature  drops  to  a  lower  than  ideal 
comfort level before the log set comes back 
on, you may want to reposition the thermostat 
sensing bulb.
The thermostat sensing bulb is located near 
the  gas  valve  assembly  on  the  mounting 
bracket. This location allows the thermostat 
to  keep  the  room  temperature  at  an  ideal 
comfort level for most replace applications. 
For positioning the thermostat sensing bulb 
elsewhere, a mounting clip is available.
Tools needed: 1/4" hex driver or socket.
1.  Remove logs. Locate the gas valve as-
sembly and thermostat sensing bulb.
LEARN
REMOTEOFF ON
Red
Red
White
Switch
Black
Green










