Guide

4 5
HOOK-UP PROCEDURE FOR COMBINATION UNITS:
Units prefixed with a “2” may be shipped separately. For
connection, set the units side by side. Install backsplash. Install
hook-up strip in the front center of the two units. Ensure that
everything is aligned properly. Install and tighten all screws.
GRIDDLE PLATE INSTALLATION:
Griddle plate front trim must be placed under the plate rest
to prevent plate from moving. Rear of plate must be lifted to
allow front edge under the plate rest. If unit is equipped with
thermostat, sensing bulbs need to be installed under the
plate prior to placing front trim under plate rest.
GAS CONNECTION & CONVERSION
PROCEDURE
GAS CONNECTION:
The size of the gas line is extremely important. If the
line is too small, the gas flow in the manifold will be low.
This inadequate flow will cause slow recovery and delayed
ignition. If in doubt about the proper size of your service line,
consult your local gas utility company.
DO NOT connect appliance before testing the pressure of
the gas service supply piping system.
FOR NATURAL GAS - Fixed orifices are set at 4” W.C.
(water column). If a pressure regulator is supplied, it must be
installed when the unit is connected to the gas supply.
FOR PROPANE GAS - Fixed orifices are set at 10” W.C.
(water column). If a pressure regulator is supplied, it must be
installed when the unit is connected to the gas supply.
Pressure regulator must be tested in a full condition (all
valves “ON”). A condensation/paniculate trap must be pro-
vided in the supply line, with a separate shut-off valve up-
stream of the regulator. These items are customer installation
responsibilites.
Your Comstock-Castle appliance is equipped with a 3/4” NPT
entrance pipe. Level the appliance under station exhaust
hood and connect the gas line from the service gas shut-off
valve to the inlet side of the gas pressure regulator using 3/4”
pipe. DO NOT use a domestic type gas flexible connector. If
a flexible or semi-flexible connector is used, an AGA Certified
Flexible Connector with an inside dimension equal to 3/4” must be
used. Always aviod sharp bends that could restrict the gas flow to
the appliance. All piping must be installed in accordance with local
codes, or in the absence of
local codes, with the National Fuel Gas Codes: ANSI Z223.1
latest edition - NFPA No. 54.
IMMEDIATELY CHECK the plumbing with a concentrated
soap solution or an approved gas dector. Coat all joints
associated with the gas distribution system. Bubbles indicate
leaks and the appliance MUST NOT be operated until the
leak is corrected. NEVER use an open flame to test for
leaks. Be sure to check all gas connections with the main
burner “ON” and “OFF”. Check and, if necessary, adjust the
manifold pressure.
GAS CONVERSION:
A qualified service technician must be used to safely
convert the appliance from natural gas to propane gas,
or vice versa. The regulator, burner orifices, pilot orifices,
and possibly the pilot lighter bar orifice, if applicable, must be
converted. The appliance must be retested for proper align-
ment, calibration, and gas pressure.
Caution: Never attempt conversion when the unit is hot!
For all manually and thermostatically controlled equipment:
If a regulator has been shipped with the unit, it MUST be installed
properly. If not factory installed, connect regulator with arrow
pointing in the direction of gas flow. Use thread compound
sparingly. NOTE: DO NOT APPLY thread compound to the female
threads of any part.
Some larger models may have two gas inputs for the manifold
system. If this is the case, all gas inputs to the unit MUST have a
factory approved regulator.
IMPORTANT NOTICE FOR UNITS WITH
CONVERTIBLE PRESSURE REGULATORS
PROPANE GAS CONVERSION INSTRUCTIONS
A griddle is equipped with fixed orifice hoods and shipped from
the factory for use on natural gas. To convert to propane gas,
install the propane burner orifice hoods supplied as follows:
1.
Remove the griddle plate by lifting with two people and set
aside.
2.
Slide the burners back off of the valve orifice hoods a couple of
inches and let it rest.
3. Remove the natural gas orifice hoods with a 1/2” wrench.
4. Apply a very little bit of pipe dope on the threads of the valve.
DO NOT APPLY PIPE DOPE INTO ORIFICE HOOD.
5. Attach the supplied propane burner orifice hoods with a 1/2”
wrench.
6. Convert the pressure regulator from Natural to Propane gas by
inverting the snap-in device beneath the cap on the regulator.
This will require a fair amount of pressure. Do not remove the
spring. When replacing the cap make sure the snap-in insert
goes down on top of the middle of the spring. (Fig. 2)
7. Test for proper pressure; 10” W.C. (water column) using a
manometer.
8. Slide burners back onto the orifice hoods.
9. Apply the Propane “Notice” stickert to the front of the unit for
futer reference.
Figure 2
LIGHTING INSTRUCTIONS
NOTE: While lighting a manual pilot system, sufficient time
must be allowed for the proper pilot flame to heat the thermo-
couple that will hold the safety valve open. If lighting for the
first time, allow some time for air to be purged from the gas
distribution system.