Middleby Marshall PS528-Series OVENS PS528 (Double) - Manual (Page 17)

SECTION 2
INSTALLATION
13
These ‘C’ Channel brackets are installed in the vertical
plane using existing screws (Item 6) to support these ‘C’
Channels using the upper and lower Key Hole openings in
the ‘C’ Channels. The ‘C’ Channels are identical and once
installed will allow ample amounts of air through the cooling
fan mounted on the rear side of the oven by keeping the
oven away from the rear wall.
If you have any questions about how to mount these two
‘C’ Channel brackets, kindly phone
Middleby Technical
Services at 847-741-3300. Press 3, then 5 for Technical
Support.
III. ELECTRICAL CONNECTION INFORMATION
FOR PS528-SERIES OVENS.
WARNING
Authorized supplier personnel normally accom-
plish the connections for the ventilation system,
electric supply, as arranged by the customer.
Following these connections, the factory-autho-
rized installer can perform the initial startup of
the oven.
Check the oven data plate (Figure 2-10) before making any
electric supply connections. Electric supply connections
must agree with data on the oven data plate.
NOTE: The electric supply installation must satisfy the
requirements of the appropriate statutory authority, such
as the National Electrical Code (NEC), ANSI/NFPA70,
(U.S.A.); the Canadian Electrical Code, CSA C22.2; the
Australian Code AG601; or other applicable regulations.
A fused disconnect switch or a main circuit breaker
(customer furnished) MUST be installed in the electric
supply line for each oven; it is recommended that this
switch/ circuit breaker have lockout/tagout capability. The
electric supply connection must meet all national and local
electrical code requirements. Copper is the recommended
material for the electrical supply conductors.
IV. ELECTRIC SUPPLY FOR
ELECTRICALLY HEATED OVENS
Power requirements for electrically heated ovens are
usually 208 - 240VAC, 1-phase, 3-wire (2 ‘hot’, 1 ground)
or 208-240VAC, 3-phase, 4-wire (3 ‘hot’, 1 ground),
although ovens built for export can have power require-
ments of 380VAC and 480VAC. (These ovens have a
4-wire system.) A 1.5″ (38mm) diameter cutout/hole in
the back of the machinery compartment provides ac-
cess for the electrical supply connections on 380V and
480V units. 208V and 240V 3-phase units have a cord
and plug. Using flexible cable(s) for the electrical power
supply conductors requires a 2″ (51mm) strain-relief fit-
ting (not furnished) to enable safe access to the terminal
block from which oven power is distributed.
The supply conductors must be of the size and material
(copper) recommended to provide the current required;
(refer to the data plate for the ampere specifications).
The electric current rating for each conductor supplying
a PS528-Series Oven ranges from a minimum of 16.4
amperes to a maximum of 48.1 amperes.
Typical specifications for each PS528-Series Oven are
208V or 240V, 1-phase, 3-wire, 10kW; this oven requires
60-ampere service. A PS528-Series Double Oven
(Figure 1-2) installation would require two 60-ampere
service connections, one for each oven; the 10kW power
consumption also doubles for such an installation to
20kW.
The 208V or 240VAC electrically heated oven uses two
legs of the supplied power to provide 208V or 240VAC
power for the oven control circuitry.
Figure 2-11. Junction Connection Box Figure 2-10. Typical Electric Oven Data Plate