Electrical Connection Information For S1820 Ovens; Section 3 Installation - Blodgett S1820 Installation Operation & Maintenance

III. ELECTRICAL CONNECTION
INFORMATION FOR S1820 OVENS.
WARNING
Authorized supplier personnel normally ac-
complish 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 2-10) 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.
Figure 2-10. Typical Electric Oven Data Plate
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),
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 machiney compartment provides access for
the electrical supply connections on 380V and 480V units.
208V and 240V units have a cord and plug. Using flexible
cable(s) for the electrical power supply conductors re-
quires a 2" (51mm) strain-relief fitting (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 cur-
rent required; (refer to the data plate for the ampere
specifications). The electric current rating for each
conductor supplying a S1820 Oven ranges from a
minimum of 17.3 amperes to a maximum of 39.9
amperes.
Typical specifications for each S1820 Oven are 208V or
240V, 1-phase, 3-wire, 8.3kW; this oven requires 50-
ampere service. An 1820S Double Oven (Figure 1-2)
installation would require two 50-ampere service connec-
tions, one for each oven; the 8.3kW power consumption
also doubles for such an installation to 16.6kW.
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
13
SECTION 2
INSTALLATION