Blodgett COMBI COS-20G Installation And Operation Manual page 9

Installation
Utility Connections
ELECTRICAL CONNECTION
Before making any electrical connections to these
units, check that the power supply is adequate for
the voltage, amperage, and phase requirements
stated on the rating name plate mounted on the
appliance.
A strain relief for the power supply cord is required.
The installer must supply a cord bushing that meets
all Local and National installation standards.
The circuit breaker that is used to provide power
to this appliance must have a minimum of 3mm
contact spacing. The circuit breaker must meet all
Local and National installation standards.
All ovens must be installed in accordance with Lo-
cal or National Electrical codes.
A wiring schematic is located on the inside of the
removeable side panel.
NOTE: Disconnect the power supply to the unit
before servicing.
WARNING!!
Improper electrical installation will invali-
date your warranty.
GAS PIPING AND PRESSURE
A properly sized gas supply system is essential for
maximum oven performance. Piping should be
sized to provide a supply of gas sufficient to meet
the maximum demand of all appliances on the line
without loss of pressure at the equipment.
Pressure Regulation and Testing
The gas pressure to the appliance must be rated
for 20 mbar while the burners are on. A sufficient
gas pressure must be present at the inlet to satisfy
these conditions.
Each unit has been adjusted at the factory to oper-
ate with the type of gas specified on the rating
plate attached to the right side of the unit.
Each oven is supplied with gas regulators to main-
tain the proper gas pressure for steam and hot air
production. The regulators are essential to the
proper operation of the oven and should not be
removed. The hot air system is regulated to 7.6
mbar. The steam system is regulated to 8.6 mbar.
DO NOT INSTALL AN ADDITIONAL REGULATOR
WHERE THE OVEN CONNECTS TO THE GAS
SUPPLY.
The oven and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 35 mbar.
The oven must be isolated from the gas supply
piping system by closing its individual manual
shutoff valve during any pressure testing of the
gas piping system at test pressures equal or less
than 35 mbar.
Prior to connecting the unit, gas lines should be
thoroughly purged of all metal filings, shavings,
pipe dope, and other debris. After connection, the
unit should be checked for correct gas pressure.
Installation must conform with Local and National
installation standards. Local installation codes
and/or requirements may vary. If you have any
questions regarding the proper installation and/or
operation of your unit, please contact your local
distributor. If you do not have a local distributor,
please call Blodgett Combi at 0011-802-860-3700.
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