Operating instructions
14
58D6002
Unvented Cast Iron Gas Stoves
The millivolt valve is a self-powered combination gas control
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. At the other end, connect
one wire to TP/TH and one wire to TH, or connect the wall switch to the two male (0.25")
terminals on the left side of the unit. The color of the wires does not matter.
ST1176
Millivolt valve wiring
On/Off
Switch
Wall
Switch
Optional Wall
Switch or
Remote
ODS Pilot
Millivolt Valve
Figure 13 -
Wiring Diagram
Switch
Spade Terminal
On/Off
Switch
ODS Pilot
3
1
2
CAUTION
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.
a. If the reading is more than 100 millivolts and the automatic valve still does not come on,
replace the control.
b. If the closed circuit reading (“A” reading) is less than 100 millivolts, determine cause for
low reading, proceed to Section B below.
1. Check gas pressure to the unit. If
gas pressure is within minimum
and maximum on data plate, then
check pilot voltage, 325 millivolts
minimum. If the minimum millivolt
reading is not obtainable, replace
pilot.
A Complete 2 & 3 Closed Closed
System
B Thermopile 1 & 2 Open Open