Middleby Marshall 60254 Manual Do Utilizador

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P/N 60254 September 28, 2012
III. ELECTRICAL CONNECTION INFORMATION 
FOR PS740E-SERIES OVENS.
WARNING
Authorized supplier personnel normally  
accomplish the connections for the ventilation 
system, electric supply, as arranged by the  
customer.    Following  these  connections,  the 
factory-authorized  installer  can  perform  the   
initial startup of the oven.
Check the oven data plate (Figure 2-17) 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 require-
ments 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. 
Figure 2-17. Typical Electric Oven Data Plate
IV. ELECTRIC SUPPLY FOR ELECTRICALLY 
HEATED OVENS
Power requirements for electrically heated ovens are usually 
208 - 240VAC, 3-phase, 4-wire (3 ‘hot’, 1 ground), although 
ovens built for export can have power requirements of 380VAC 
and 480VAC. (These ovens have a 5-wire system.) A 2″ (51mm) 
diameter cutout/hole in the back of the machinery compartment 
provides access for the electrical supply connections. Using 
flexible  cable(s)  for  the  electrical  power  supply  conductors 
requires a 2″ (51mm) strain-relief fitting (not furnished) to en-
able safe access to the terminal block from which oven power 
is distributed.
The supply conductors must be of the size and material (cop-
per) recommended to provide the current required; (refer to the 
data plate for the ampere specifications). The electric current 
rating for each conductor supplying a PS740E-Series Oven 
must comply to local and national codes.
Typical  specifications  for  each  PS740E-Series  Oven  
are  208V  or  240V,  3-phase,  4-wire,  60-ampere,  34.4kW.  A 
PS740E-Series Double Oven (Figure 1-2) installation would 
require  two  60-ampere  service  connections,  one  for  each 
oven; the 34.4kW power consumption also doubles for such 
an installation to 68.8kW.
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. 
Electrical Junction Box  
(One per oven cavity)
Figure 2-18.  Utility Connection Locations for Elec-
tric Ovens