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"Duzy" Gas Log Sets – The Look and Feel of a Real Wood Fire
The heater gas inlet connection is 3/8" NPT at the regula-
tor, inlet on the right side facing the gas log. If a left side
connection is required, the connecting pipe may be led
under the rear of the gas logs or behind the grate for con-
nection to the inlet.
NOTE: The millivolt valve has an internal regulator, thus
the incoming gas line connects directly to the valve.
Test all gas joints from the gas meter to the appliance
regulator for leaks using a gas analyzer or soap and water
solution after completing connection. DO NOT USE AN
OPEN FLAME.
Check the gas pressure with the appliance burning.
MILLIVOLT CONTROL
Figure 6
The valve regulator controls the burner pressure which
should be checked at the pressure test point. Turn captured
screw counter clockwise 2 or 3 turns and then place tubing
to pressure gauge over test point (Use test point labeled
"OUT"). After taking pressure reading, be sure and turn
captured screw clockwise firmly to re-seal. Do not over
torque. Check for gas leaks.
Test Port "Out"
Figure 6 -
Pressure Test Point Location
FP2856
millivolt valve
8
GAS LINE CONNECTION / ELECTRICAL WIRING
Label all wires prior to disconnection when
servicing controls.
Wiring errors can cause improper and dan-
gerous operation.
Verify proper operation after servicing.
The Millivolt (thermopile) is a self powered combination
gas control that does not require 110VAC to operate. See
Figure 7 and installation instructions provided with optional
wall switch or remote control for wiring instructions. A max-
imum length of 15 feet of 18awg two conductor wire is to
be used for wall switch. Note switches must be suitable
for millivolt operation.
CHECkING SYSTEM OPERATION
The millivolt system and individual components may be
checked with a millivolt meter having a 1-1000 mV range.
Conduct each check shown in chart by connecting meter
test leads to terminals as indicated.
A. Complete Millivolt System Check
("A" Reading - Contacts CLOSED - Control knob "ON"
- Main burner should turn ON)
1. If reading is more than 100 millivolts and the au-
tomatic valve still does not come on, replace the
control.
2. If the closed circuit reading ("A" reading) is less
than 100 millivolts, determine cause for low read-
ing, proceed to Section B.
B. Thermopile Output Reading Check
("B" Reading - Contacts OPEN - Main burner OFF
1. 325 millivolts minimum. If the minimum millivolt
reading is not obtainable, readjust pilot for maxi-
mum millivolt output. If millivolt reading is still below
minimum specified, replace thermopile.
FP2856
Check
Test
A
B
Connect
Meter Leads
To Test
To Terminals
Complete
TH & THTP
System
Thermopile
TP & THTP
Output
Meter
Reading
Should Be
Minimum
100mV
Minimum
325mV
20304949
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