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GrandCanyonGasLogs.com
customerservice@grandcanyongaslogs.com
SERVICE INSTRUCTIONS
A. TEST RESULTS
If the reading is more than 100 millivolts and the au-
tomatic valve does not come on, replace the valve
operator. If the closed circuit reading is less than 100
millivolts, determine the cause by proceeding with
steps “B” and “C”.
B. TEST RESULTS
If “B” reading is less than 325 MV, clean and tighten all
electrical connections and adjust pilot if necessary to
increase millivolt output. If un- able to adjust to at least
the specified minimum, change the thermopile.
When proper thermopile output is obtained the magnet
may then be checked. With pilot in operation, allow
meter reading to stabilize.
Extinguish pilot burner and note meter reading at drop-
out point of magnet. If magnet remains locked up to a
reading of 120 MV or less, the magnet is good.
C. TEST RESULTS
If “C” reading is more than that specifed for the system
being checked, clean and tighten thermostat leads
and connections, shorten lead wires if possible or use
heavier gauge wire. Rapidly cycle thermostat to clean
contacts, or change the thermostat.
PILOT BURNER ADJUSTMENT
1. Remove pilot adjustment cap.
2. Adjust pilot key to provide properly sized flame on
the thermopile. The flame should cover the upper
3/8” of the tip.
3. Replace pilot adjustment cap.
IMPORTANT: Do not use GAS COCK DIAL to adjust
gas output on 710 models.
REGULATOR CONVERSION OR REPLACEMENT
CAUTION: Main burner and pilot orifices must be
changed when regulator is converted from one type of
gas to another.
710 Series valves can be converted from nonregulat-
ed to regulated operation by adding one of the 1751
Series regulators. To convert from regulated to nonreg-
ulated, order Part Number 1751-007.
To convert L.P. gas 11.0” W.C. use 1751-016.
1. Depress and turn Gas Cock Dial to “OFF”.
2. Remove two screws, regulator cartridge and gasket.
3. Install new gasket and regulator (this assembly must
be positioned properly). Use new screws supplied
with regulator and tighten down.
4. Relight appliance by following steps 4, 5 and 6 of
procedure for lighting and relighting.
5. Test for leaks around the regulator using soap
solution with main burner “ON”.
PRESSURE REGULATOR ADJUSTMENTS
Adjustment of the pressure regulator is not normally
necessary since it is preset at the factory. However,
field adjustment may be accomplished as follows:
NOTE: Manometer attachment may be accomplished
at pressure tap plug, below control outlet, as shown in
figure below.
MODELS WITH OUTLET PRESSURE TAP
NEXT TO OUTLET.
1. Manometer or gauge attachment may be
accomplished at pressure tap plug.
2. Remove regulator adjustment screw cap.
(Top of regulator.)
3. With a small screwdriver, rotate adjustment screw
“clockwise” to increase or “counterclockwise” to
decrease pressure.
4. Replace regulator adjustment screw cap once
desired pressure is reached.
