Check Gas Pressure; Electrical Installation-Signature Command System; Electrical Wiring; Command Center Wall Installation - Monessen Hearth NB18 Installation And Operating Instructions Manual

ELECTRICAL INSTALLATION — SIGNATURE COMMAND SYSTEM

CHECK GAS PRESSURE

1. Check gas type. The gas supply must be the same as
stated on the appliance's rating decal. If the gas supply
is different from the fireplace, STOP! Do not install the
appliance. Contact your dealer immediately.
2. After completing gas line connection, purge air from
gas line and test all gas joints from the gas meter to the
fireplace for leaks. Use a solution of 50/50 water and
soap solution or a gas sniffer.
3. To check gas pressures at valve, turn captured screw
counter clockwise 2 or 3 turns and then place tubing
to pressure gauge over test point. Turn unit to high.
Figure 52. After taking pressure reading, be sure and
turn captured screw clockwise firmly to reseal. Do not
over torque. Check test points for gas leaks.

ELECTRICAL WIRING

General
This fireplace is equipped with the Signature Control valve
which operates on 6 volts. Four (4) "AA" batteries are used
to power control.
Optional Accessory Requirements
1. This fireplace may be used with a wall switch and/or
Signature Command wireless controls.
2. The command center control may be mounted on the
wall with the use of the SCSWEK 15ft. wall mount
extension kit.

COMMAND CENTER WALL INSTALLATION

The command center may be mounted on the wall with
the use of the SCSWEK Kit (15ft. cable, junction box, wall
cover).
Mount the junction box provided at the desired location
on the wall. Do not extend beyond the 15 ft. wire cable
provided. If a longer distance is required, the 15 ft. may be
extended up to 30 ft. maximum by using two (2) SCSWEK
cables plugged together.
Route the wire from junction box to the burner control in the
fireplace. Unplug the 12" cable from the command center.
Attach the connector to the pins from wire by pushing in
to connector making sure to follow the color code on con-
nector. Plug the 15 ft. extension cable into the 2 ft. cable.
Remove command center from the fireplace and plug the
other end of the extension cable into the command center.
Snap on wall cover provided and screw to junction box.
Monessen • NB18/24 Gas Log Set Installation/Owner's Manual • 81D0107 • Rev I • 01/19
30
Pressure Outlet
Figure 52 -
Signature Command Valve
FP1909a
WARNING
signature command valve
Do not use open flame to check for gas leaks.
alternate view
8/08
Label all wires before disconnecting when
servicing controls. Wiring errors can cause
improper and dangerous operation.
WARNING
Do not connect wall switch to 110 V circuit.

WALL SWITCH INSTALLATION

The wall switch wire connection is located off the 2 ft. wire
harness from the control box to the command center. Figure
48. The connection is labeled "Wall Switch". Unplug the
male and female connectors and connect the two (2) low
voltage wires not provided. Run wire to desired location on
wall. Up to 50 ft. of 18 ga. wire may be used if necessary.
Attach wires to wall switch. Mount the wall switch in to
junction box and screw on cover.
NB18/NB24 Gas Log Set
Pressure Inlet
FP1909a