Electrical Wiring (Millivolt); Connecting Optional Wall Switch Or Thermostat - Vermont Castings NBST27 Installation Instructions Manual

ELECTRICAL WIRING - MILLIVOLT
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.
ON/OFF Switch
or Optional Wall
Switch, Remote
or T-Stat
Figure 14 -
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.
81D3032
TH = 3
TP = 1
TP/TH = 2
Log
Switch
ODS Pilot
Millivolt Valve
FP2267
FP2267
millivolt wiring
NBST27 Unvented Gas Log Set
ODS Pilot
13