Specifications

USSC
14
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE
TESTING MANIFOLD AND
INLET PRESSURE
To test the Manifold gas pressure and Inlet
gas pressure in the field, simply follow the
instructions below.
NOTE: Manometer attachment may be
accomplished by sliding a rubber tube con-
nected to the manometer to the pressure
taps.
1. Locate the Manifold and Inlet pressure
taps on the control. (See Figure 20)
NOTE: The following instructions
apply for both the Manifold and Inlet
pressure tests.
2. With a small screwdriver, rotate the
screw in the pressure tap "counter-
clockwise" until loosened. NOTE:
Screw is designed not to come
completely out.
3. Attach Manometer to pressure tap and
take reading.
4. Once testing is complete, rotate the
pressure tap screw "clockwise" and
tighten securely.
1. Open lower door and locate the 1/4"
O.D. tubing connecting the control to the
bottom of the pilot.
2. Loosen the nut on the tubing at the pilot
completely then gently pull down on the
pilot tubing to expose the pilot orifice.
(Fig. 21)
3. Remove pilot orifice and put correct
orifice for the desired gas on the end of
the tubing. (Fig. 21)
4. Reinstall the pilot supply tubing, with
orifice, in the base of the pilot and
tighten nut.
5. Next, locate the conversion cap on the
control and remove it. (Fig. 22)
6. Rotate the conversion cap until the
desired gas designation is exposed and
reinstall it in the control.
7. Open glass door and remove the
ceramic logs.
8. Remove burner screw and then remove
burner.
9. Unscrew burner orifice and install orifice
for the gas to be used as identified on
the unit rating plate. When installing
the new orifice you
must use a pipe
sealant approved for use with Natural
and LP gas.
10.Install burner and burner screw.
11. Check for gas leaks at all connections.
12.Replace ceramic logs and close glass
door.
GAS
CONVERSION
Warning! Improper installation, adjustment, alteration, service or maintenance can
cause injury or property damage. For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
Due to high surface temperatures, keep children, clothing and furniture away.
Keep burner and control compartment clean.
Fig. 22
Fig. 21
LP Pilot Orifice Natural Pilot Orifice
LP Pilot orifice will be color coded BLACK.
30 51
Remove screw with
philips driver to
lift burner
Main Orifice
(Remove with
7/16 wrench)
Conversion Cap
Orifice for
Conversion will
be attached to
piping here
E
A
P
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T
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F
F
P
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L
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T
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S it
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A
TP TH
TP TH
on
off
INLET PRESSURE
TAP
MANIFOLD
PRESSURE TAP
Fig. 20