Connections; Gas - TurboChef HHC-3240 Installation Manual

Connections

Leak-testing all connections is required.
NOTE: TurboChef suggests using a soap solution;
however, check with the local code authority to ensure
that no other test is required (refer to the regulations
in force in the country in which the appliance is being
installed). The prevailing authority is the local code (or
regualtions).
1. Soap-test all connections for gas leaks.
a. Turn on the gas supply.
b. Spray all gas connections with a soap solution.
-If growing soap bubbles are observed, a leak is
present. Immediately shut off the gas supply.
-If no growth occurs, the connections are intact.
Turn off the gas supply.
2. Verify the size of the breaker. For North America,
20 Amp independent circuit is required, for EU/Asia
a 16 Amp independent circuit is required.
3. Ensure there is an individual breaker per unit for
multiple oven locations.
4. Ensure the factory-supplied plug is used, or note any
differences on the Start-up Checklist.
5. Write the voltage readings at the incoming voltage
terminal block on the Start-up Checklist.
6. Verify the 24 VAC transformer confi guration: 208 or
240. The oven is shipped with the transformer's
primary wiring disconnected. Determine the voltage
on site during the start-up process and connect the
transformer accordingly. See fi gure Connections,
-208 VAC installation: connect wire B (blue) to wire
C (blue). The fi gure below is confi gured for 208
VAC operation.
-240 VAC installation: connect wire A (red) to wire
C (blue).
NOTE: The oven will not operate until this task is
completed.
C
B
A
Connections, Step 6

Gas

Activate maintenance mode (refer to page 9) if necessary.
An Electronic Manometer must be used to properly set
all pressures. If the minimum pressure is not set cor-
rectly, the oven temperature will slowly rise in stand-by
mode and eventually cause cooking issues as well as trip
the high limit temperature switch. Electronic Manom-
eters (HHC-3001) are available through TurboChef; call
800.90
1. Verify the type of gas being supplied to the oven —
natural, propane/L.P, I
2. Verify the type of gas to which the oven was factory-
set to operate. Check the data plate on the rear of the
oven (this should match the type of gas being
supplied to the oven).
3. Verify the proper orifi ce is installed and it matches
the description of the data plate. The orifi ce (fi g.
Gas, Step 3) is located at the base of the fl ex
connector attached to the burner inlet. A blue orifi ce
is used for natural gas. A yellow orifi ce is used for
propane/L.P. gas.
4. Verify the incoming gas pressure (static). This is the
pressure sent to the oven from the existing piping
system when all of the equipment in the piping
system is off (pilot lights are acceptable). Take this
reading from the upper tap of the gas valve (fi g. Gas,
Steps 4-7). This tap will show the incoming pressure
before the internal regulator of the gas valve. This
(static) reading is to be taken with the oven off and
Step 6. with all of the other appliances in this piping system
also off.
WARNING: The pressures must be no less than
6" W.C. (152.4 mm H
than 14" W.C. (350.6 mm H
Otherwise, severe damage to the equipment can
occur.
Gas, Step 3
(+1 214-379-6000) for pricing and
TURBO
, I , I
2H 2E
O, 14.94mb) and no more
2
2
Gas, Steps 4-7
availability.
, I , or I .
2E+ 2L 3P
O, 34.87 mb).
Red or White
Wire
Upper Tap
Lower Tap
8mm nut
5mm nut
11