Wiring (Milli-Volt) - Monessen Hearth VWF18N Installation And Operating Instructions Manual

WIRING (MILLI-VOLT)

Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing
Pilot
The Milli-Volt (thermopile) is a self powered combination gas control
that does not require 110VAC to operate. See Figure 12 and installation
instructions provided with optional wall switch or remote control for wiring
instructions. A maximum length of 15 feet of 18awg two conductor wire
is to be used for wall switch. Note switches must be suitable for milli-volt
operation. The optional wall switch and remote receiver must be mounted
outside the fi rebox.
CHECKING SYSTEM OPERATION
The milli-volt system and individual components may
be checked with a milli-volt meter having a 0-1000MV
range. Conduct each check shown in chart below by
connection meter test leads to terminals as indicated.
A. COMPLETE MILLI-VOLT SYSTEM CHECK
("A" READING - THERMOSTAT CONTACTS CLOSED - CONTROL KNOB "ON" - MAIN BURNER
SHOULD BE COME ON)
a. If the reading is more than 100 milli-volts and the automatic valve still does not come on — replace the control.
b. If the closed circuit reading ("A" reading) is less than 100 milli-volts, determine cause for low reading —
proceed as follows:
B. THERMOPILE OUTPUT READING CHECK
("B" READING - THERMOSTAT CONTACTS OPEN - MAIN BURNER OFF)
a. 325 milli-volts minimum. If the minimum milli-volt reading is not obtainable, readjust pilot for maximum milli-volt
output. If milli-volt reading is still below minimum specifi ed, replace thermopile.
12
Optional Wall Switch or Remote Reciever
Figure 15 - Wiring Diagram
THTP THTP
TP
TH
CHECK CHECK CHECK CHECK CHECK TO TO TO TO TO
TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
A A A A A COMPLETE COMPLETE COMPLETE COMPLETE COMPLETE
SYSTEM SYSTEM SYSTEM
B B B B B THERMOPILE THERMOPILE THERMOPILE THERMOPILE THERMOPILE
OUTPUT OUTPUT OUTPUT
Do not connect to 110
volt supply.
Milli-volt
Valve
Keep wiring away from
heat source and hot
surfaces.
CONNECT CONNECT
METER METER METER METER METER METER METER METER METER METER
LEADS TO LEADS TO LEADS TO LEADS TO LEADS TO READING READING READING READING READING
TERMINALS TERMINALS TERMINALS TERMINALS TERMINALS SHOULD BE SHOULD BE SHOULD BE SHOULD BE SHOULD BE
TH & THTP TH & THTP TH & THTP TH & THTP TH & THTP CLOSED CLOSED CLOSED CLOSED CLOSED
TH & THTP TH & THTP TH & THTP TH & THTP TH & THTP OPEN OPEN OPEN OPEN OPEN
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