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INSTALLATION (cont’d)
ENERGY CUT OFF (E.C.O.)
CONNECTION
A five-function valve uses the two E.C.O. terminals that are
connected to the magnetic assembly where the thermo-
couple connects to the 36C valve line interrupter.
Connect the leads from the E.C.O. terminals to the E.C.O.
device on the furnace. Test the E.C.O. device for continu-
ity. If there is no continuity, the power unit will not hold in.
See figure 5.
If the furnace does not have an E.C.O. device, jumper the
E.C.O. terminals on the valve with the jumper loead
provided.
THERMOCOUPLE CONNECTION
(For .750 VDC (Special), 24 VAC and
120 VAC Models)
The thermocouple connection should be clean to ensure
good electrical contact.
Run the thermocouple nut into the power unit tapping as
far as possible by hand. Then use a small wrench to set
the nut with a 1/4 to 1/2 additional turn. Do not over-
tighten.
PILOT GENERATOR CONNECTION
(For .750 VDC Models)
Be sure the pilot generator is completely engaged into the
pilot burner.
Be sure that the two terminals from the pilot generator are
securely tightened beneath the proper screws on the
valve.
Connect the power unit lead to the high limit and the
high limit to the TH-PG terminal.
PILOT GAS ADJUSTMENT
If the pilot flame is low and does not engulf the bulb of the
mercury flame sensor, the system will not energize the
main valve. If pilot gas pressure is too high, gas will sputter
past the ignition electrode, and may not ignite. High pilot
gas pressure may also cause the flame to lift off the
burner, causing the flame sensor bulb to sense "low" heat.
To adjust the pilot gas pressure, remove the cover screw
(see fig. 7). To REDUCE pilot pressure, turn the pilot
adjust screw (beneath the cover screw) clockwise. To
INCREASE pilot pressure, turn the pilot adjust screw
counterclockwise. Replace and tighten cover screw.
PRESSURE REGULATOR
ADJUSTMENT
The pressure regulator has been factory adjusted (see
control for specific setting). Although additional adjust-
ments will not normally be necessary, you may adjust the
regulator. Do not force the adjusting screw beyond the
limits that it can easily be adjusted.
1. Energize valve to ignite main burner.
2. Remove "Reg. Adj." cover screw (see fig. 8).
3. To DECREASE outlet pressure, turn the adjusting
screw (beneath the cover screw) counterclockwise.
To INCREASE outlet pressure, turn the adjusting
screw clockwise.
4. Replace the cover screw. Cycle the valve two or three
times to verify regulator setting.
Pilot adjust
cover screw
Figure 8. Pressure regulator adjustment
Regulator adjusting
cover screw
O
F
F
P
I
L
O
T
O
N
Pilot adjust
cover screw
Gasket
Pilot
adjust
screw
Figure 7. Pilot gas adjustment