Middleby Marshall PS629G Series, Owner'S Operating & Installation Manual

Page: 22 / 52

SECTION 2
INSTALLATION
22
Gas Valve
F. Checkout
After any adjustment, set appliance in operation and
observe through a component cycle to ensure that
burner system components function correctly.
G. Maintenance
It is recommended to check yearly the minimum and
the maximum setting and readjust them if necessary.
H. Connection
WARNING
Some procedures in this section may require
conversions, readjustments, or service on the
oven’s gas system. Before performing these
procedures, check that the main gas supply
valve and the circuit breaker/fused disconnect
are in the OFF (“O”) position. After completing
these procedures, perform a gas leak test
before operating the oven.
CAUTION
The terms of the oven's warranty require all
start-ups, conversions, and service work to be
performed by a Middleby Marshall Authorized
Service Agent. The installation, start-up and
changes required when changing from one gas
type to another can be performed ONLY by a
certified professional.
NOTE: Certain safety code requirements exist for the
installation of gas ovens; refer to the beginning of
Section 2 for a list of the installation standards. In
addition:
• In the USA
, the installation must conform with local
codes, or in the absence of local codes, with the
National Fuel Gas Code, ANSI Z223.1.
• In Canada
, the installation must conform with local
codes, or in the absence of local codes, with the
Natural Gas Installation Code, CAN/CGA-B 149.1,
or the Propane Installation Code, CAN/CGA-B
149.2, as applicable.
• In Australia
, the installation must conform with
AGA Codes AG311 and AG601, and with any
requirements of the appropriate statutory
authority.
• In CE countries
, the gas supply connection should
be according to EN-203 (gas appliance directive)
and to applicable ISO 228-1 or ISO 7-1
recommendations. All aspects of the gas supply
connection must comply with current IEC/CEE
requirements and with all applicable local,
national, and international codes.
• For all ovens equipped with casters
, the gas line
connection shall be made with:
− A connector that complies with the Standard
for Connectors for Movable Gas Appliances,
ANSI Z21.69 (in USA), or Connectors for
Movable Gas Appliances, CAN/CGA-6.16 (in
Canada).
Check the oven’s gas supply requirements to
determine the type of gas to be used with the oven. If
the gas type required does NOT match the local
supply:
• For North American installations, a conversion kit
is supplied with the oven to allow operation using
propane gas.
• For CE ovens, directions for converting the oven
for use with other gases are described in Part B,
Gas Conversion
, in this section.
If the installation will use the supplied gas hose, be
sure that the 1/2" to 3/4" gas line fitting is attached.
Refer to the instructions in the gas hose package. One
gas line connection method is shown in Figure 20;
however, compliance with the applicable standards
and regulations is mandatory.
Inlet and regulated gas pressures can be measured
using a “U” tube manometer at the tap locations shown
in Figures 20 and 21.
1. Checking the Gas Supply (Inlet) Pressure
With the main gas supply valve closed and
the circuit breaker/fused disconnect in the
OFF (“O”) position, open the inlet pressure
tap shown in Figure 21 and attach a
manometer to the tap.
Depress the safety switches to allow the
oven to operate.
Adjustment Screw (5mm)
for minimum pressure
setting
Adjustment
Screw (8mm) for
maximum
pressure
setting
White
Solenoid