Connect Remote Receiver; Check System Operation - Monessen Hearth NB18 Installation And Operating Instructions Manual

ELECTRICAL WIRING - MILLIVOLT

CONNECT REMOTE RECEIVER

1. Set remote receiver. See instructions included in
receiver kit.
2. Connect the two (2) 1/4" female connectors to the TP/
TH and TH terminals on the control valve.
NOTE: Do not allow wires touch grate or burner.
NOTE: Heat reduces battery life. You can protect the
receiver and extend battery life by mounting receiver
in wall or other location outside the fi replace.

CHECK SYSTEM OPERATION

The millivolt system and individual components may be
checked with a millivolt meter having a 0-1000 mV range.
Conduct each check shown in chart below by connection
meter test leads to terminals as indicated.
Check
Test To Test
A Complete System
B Thermopile Output
Figure 17 -
Installing Remote Receiver
81D0107
Connect Meter Leads
to Terminals
2 and 3
1 and 2
Remote Wire
Connectors
TP/TH = 2
TP = 1
TH = 3
A. Complete Millivolt System Check
("A" Reading - Thermostat contacts CLOSED -
Control Knob "ON" - Main burner should turn
ON)
a. If the reading is more than 175 millivolts and the
automatic valve still does not come on, replace the
control.
b. If the closed circuit reading ("A" reading) is less than
175 millivolts, determine cause for low reading, pro-
ceed to Section B below.
B. Thermopile Output Reading Check
("B" Reading - Thermostat contacts OPEN - Main
burner OFF)
1. Check gas pressure to the unit. If gas pressure is
within minimum and maximum on data plate, then
check pilot voltage, 500 millivolts minimum. If the
minimum millivolt reading is not obtainable, replace
pilot.
Switch to Thermostat
Contacts
Closed
Open
Remote Wire
Connectors
Valve
Remote Receiver
NB18/NB24 Gas Log Set
Meter Should Read
Minimum 175
Minimum 500
FP2268
15