GENERAL GUIDE FOR SET-UP OF NOVA MV
SYSTEM.
1). Bleed all air from gas lines.
2). With the main burner functioning, adjust the inlet pressure regulator to supply gas to
the appliance within the design parameters of the appliance manufacturer.
3). Make certain that the thermocouple and thermo-generator are fully inserted and
tightened into their receptacles in the pilot head. The thermocouple should be threaded
into the valve hand-tight, plus ¼ turn with a wrench.
4). Verify that the system is wired properly, and that all connections are clean and tight.
Thermo-generator leads are connected to the TPTH and TP connections of the main
operator. Thermostat and wall switch wires are connected to the TPTH, and TH terminals
of the valve.
5). Turn OFF/PILOT/ON knob to the PILOT position and depress knob, while lighting
the pilot with a match or piezo ignitor.
6). Continue to hold the knob down until enough current is generated to engage the safety
magnet.(Mill-Volt Plus systems use a thermocouple to power the safety magnet, Millivolt
systems utilise power from the thermo-generator).
7). After the pilot has been lit for approximately three minutes , and only the thermo-
generator wires connected to the main operator head, measure the voltage across TPTH
and TP. This open circuit voltage should be between 500mV and 750mv. Tune the pilot
adjustment screw until the mV reading falls within these parameters. (Counter clockwise
increases the mV reading, clockwise decreases)
8).With the pilot adjusted properly, place a jumper wire between TPTH and TH. Take
mV reading across the TPTH and TP terminals on the valve. This closed circuit voltage
should remain above 300mV.
9).Remove jumper wire from the TPTH and TH connections, and re-connect the
thermostat and wall switch wire to the same terminals. Take the closed circuit voltage as
described in the previous step. This closed circuit should remain above 175mV.
10). Rotate OFF/PILOT/ON knob to the ON position. Main burner will light.
11).Verify operation of the thermostat and wall switch by cycling each individually,
while observing the main burner operation.
12). Rotate the OFF/PILOT/ON knob to the OFF position. Both the pilot and main burner
will be extinguished.
