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Field Connections
a)
b)
c)
d)
MUST
ONLY.
Remove the cover from the Power Distribution Box Panel ( on right side when
facing front of unit).
Locate the 4-pole Power Distribution Terminal Block mounted in the Power Distribution Box.
Install the proper strain relief for the utilizing the knock-out hole
provided. The strain relief should be securely fastened.
Supply the proper conduit to the conveyor oven and connect through the strain relief. Connect
properly-sized, copper-only conductor wires (rated 90°C) to the Power Distribution Terminal Block in
accordance with the schematic shown on the rating plate, as well as the wiring diagram provided.
NOTE: For three-phase connections, if any “High Voltage Leg” conductor is present, it be
mounted to L3 Replace the cover and fasten securely with removed screws.
under the control box
PERMANENT CONNECTION
NOTE: VERIFY THAT INPUT POWER MATCHES THE OVEN POWER REQUIREMENTS STATED
ON THE RATING PLATE, WHICH IS LOCATED ON THE POWER CONTROL BOX.
IF INPUT VOLTAGE DOES NOT MATCH OVEN VOLTAGE REQUIREMENTS, THE CORRECT
CONVEYOR OVEN MUST BE INSTALLED. THE CONVEYOR OVEN CANNOT BE MODIFIED IN THE
FIELD TO MATCH INPUT POWER.
CAUTION: VERIFY VOLTAGE OF EACH LEG. IF ANY LEG HAS A
VOLTAGE GREATER THAN 240V THIS LEG MUST BE CONNECTED TO L-3 ON THE POWER
DISTRIBUTION BLOCK.
FOR DUALAIR MODELS VH1620E, VHVA1620E:
FOR DUALAIR MODELS VH1828E, VHVA1828E:
FOR 3 PHASE UNITS ONLY:
These units are supplied with a flexible power cord, according to the specification placed with the
original order, which specified either single-phase or three-phase operation. No internal field
connection is necessary. All internal connections are complete. Connect the power cord to the
proper power receptacle. (see diagram below).
Note: If a different power cord is required than supplied, the correct power cord must be obtained
from a factory authorized service agent. Only an authorized service agent is to replace a power
cord.
G
L3
L2
L1
G4
R (BROWN)
L2
L2
L2
5
E(BROWN)
4
A
FACTORY WIRING
TO INTERNAL CIRCUITS
FIELD WIRING
SERVICE CONNECTIONS
SINGLE-PHASE CONNECTION
G
L3
L2
L1
G4
R (BROWN)
L2
L2
L2
5
E(BROWN)
4
A
FIELD WIRING
SERVICE CONNECTIONS
FACTORY WIRING
TO INTERNAL CIRCUITS
THREE PHASE CONNECTION
NEMA SPECS.
1620E 3 PHASE1620E 1 PHASE
6-50P
L15-30P