User Manual
27D7300
12
VWF Series Vented Gas Log Set
WIRING - MILLIVOLT
The Millivolt (thermopile) is a self powered combination gas
control that does not require 110VAC to operate. See Figure
15 and installation instructions provided with optional wall
switch or remote control for wiring instructions. A maximum
length of 15 feet of 18 awg two conductor wire is to be used
for wall switch. Note switches must be suitable for Millivolt
operation. The optional wall switch and remote receiver
must be mounted outside the rebox.
CHECKING SYSTEM OPERATION
The Millivolt system and individual components may be
checked with a Millivolt meter having a 0-1000MV range.
Conduct each check shown in chart below by connection
meter test leads to terminals as indicated.
A. COMPLETE MILLIVOLT SYSTEM CHECK
("A" READING - CONTACTS CLOSED - CONTROL KNOB "ON" - MAIN BURNER
SHOULD BE COME ON)
a. If the reading is more than 100 Millivolts and the automatic valve still does not come on
— replace the control.
b. If the closed circuit reading (“A” reading) is less than 100 Millivolts, determine cause for low
reading — proceed as follows:
B. THERMOPILE OUTPUT READING CHECK
(“B” READING - CONTACTS OPEN - MAIN BURNER OFF)
a. 325 Millivolts minimum. If the minimum Millivolt reading is not obtainable, readjust pilot for
maximum Millivolt output. If Millivolt reading is still below minimum specied, replace thermo-
pile.
WARNING
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing
WARNING
Do not connect to 110 Volt supply
FP2738
wiring diagram
Pilot
THTP
TP
TH
Millivolt
Valve
FP2738
Optional Wall
Switch or Remote
Receiver
WARNING
Keep wiring away from heat source and
hot surfaces.
Connect
Meter Meter
Check To Test Leads to Reading
Test Terminals Should Be
A Complete TH & TH/TP Min. 100 mV
System
B Thermopile TYP & THTP Min. 325 mV
Output