Gas Log Set Installation

NBST27 Unvented Gas Log Set

Monessen • NBST27 Gas Log Set Installation/Owner's Manual • 81D3032 • Rev A • 08/16

ELECTRICAL WIRING — MILLIVOLT

The Millivolt valve is a self-powered combination gas con-

trol THAT DOES NOT REQUIRE 110VAC TO OPERATE.

Figure 14 -

Wiring Diagram

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

FP2267

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.

Label all wires prior to disconnection when servic-

ing controls. Wiring errors can cause improper and

dangerous operation. Verify proper operation after

servicing.

WARNING