INSTALLATION & OPERATION MANUAL 10201 REV 2 (08/22)
PAGE
15
OF28
Gas Tilting Kettle
S
ervice
WARNING
Adjustments and service work may be performed only by a qualified technician who is experienced in,
and knowledgeable with, the operation of commercial gas cooking equipment. To assure your confidence,
contact your authorized service agency for reliable service, dependable advice or other assistance, and
for genuine factory parts.
S
ervice
G
eneral
When any difficulty arises always check that the unit has been connected to the gas supply type and voltage for which it
was supplied. This can be done by examining the serial plate on the lower right side of the unit. It will list the gas type and
voltage for which the unit was manufactured.
Wiring diagrams for the unit are located in a small envelope affixed to the side panel of left hand console.
UNIT
TOTAL INPUT
ORIFICE SIZE
NATURAL
PROPANE
GLT-40F
120,000 BTU/Hour
DMS # 7 (0.201")
DMS # 23 (0.154")
M
anifold
P
ressure
Natural Gas
- 3.5 inches W.C.
LP Gas
- 4 inches W.C.
A
djustments
T
hermostat
The thermostat adjustment should not be changed. Check the following before changing the thermostat.
1. With kettle cold, the pressure on the pressure gauge should read in the green vacuum zone (25 to 30 inches Hg vacuum).
If not, see ‘Re-establishing Vacuum” section.
2. The pressure switch may be set too high or too low and causing the out of adjustment condition. A voltmeter should
be used by a properly trained serviceman to determine if the pressure switch or thermostat is actually cycling the
burners. If the pressure switch is found to be cycling the burners, see “Pressure Switch” section.
After verifying that the pressure switch is set and operating properly, the thermostat may be adjusted using the set screw
inside the stem. At maximum setting, the thermostat should cycle off at a gauge pressure reading of 30 psi. Turn set screw
clockwise to decrease pressure and counterclockwise to increase pressure.
P
ressure
S
witch
The pressure switch should not be adjusted until it is determined to be the cause of an operating pressure difficulty.
See “Thermostat” section to determine if the source of difficulty is the pressure switch or thermostat.
The major difficulties caused by pressure switch mis-adjustment are:
1. Pressure relief valve opening, pressure rises above 45 psi.
2. Pressure in kettle is less than 30 psi and burner is being shut down by pressure switch (not thermostat).
The pressure switch is preset for proper operation from the factory. It is adjusted to the maximum pressure which will
prevent the pressure relief valve from opening. During preheat to the maximum thermostat setting (275 °F), from either
a cold condition or a lower temperature setting, the temperature may overshoot the thermostat setting and be shut
down by the pressure switch. This is normal, however, after the kettle has cycled several times (empty) the thermostat
will begin cycling the unit.
