14
81D3032
NBST27 Unvented Gas Log Set
ELECTRICAL WIRING - MILLIVOLT
W
ARNING
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
The Millivolt valve is a self-powered combination gas con-
trol THAT DOES NOT REQUIRE 110VAC TO OPERATE.
TH = 3
TP = 1
TP/TH = 2
FP2267
millivolt wiring
ON/OFF Switch
or Optional Wall
Switch, Remote
or T-Stat
Log
Switch
Millivolt Valve
ODS Pilot
ODS Pilot
FP2267
Figure 15 -
Wiring Diagram
NOTE:
Log switch wires are not fac-
tory connected. Connect log switch
wires to the TH/TP and TH valve
terminals.
CONNECTING OPTIONAL WALL SWITCH OR THERMOSTAT
1. Use 18 awg, two-wire cable, 15 feet maximum length.
2. At one end of the cable, connect both wires to the wall switch or thermostat. At the other
end, connect one wire to TP/TH and one wire to TH, or connect the wall switch/thermostat
to the two male (0.25") terminals on the left side of the unit. The color of the wires does
not matter.