Electrical Wiring - Millivolt; Connect Optional Wall Switch Or Thermostat - Monessen Hearth NB18 Installation And Operating Instructions Manual

NB18/NB24 Gas Log Set
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 control
THAT DOES NOT REQUIRE 110 VAC TO OPERATE.
On/Off Switch
or Optional Wall
Switch, Remote
or T-Stat
Figure 16 -
Wiring Diagram
NOTE: Log switch wires are not factory connected. Connect log switch wires to the TH/TP and TH valve terminals as
shown.
14
TH = 3
TP = 1
TP/TH = 2
Log Switch

ELECTRICAL WIRING - MILLIVOLT

CONNECT 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.
ODS
Pilot
Millivolt
Valve
ODS Pilot
81D0107