
(Vers. 10.26.2017)
Page 22 of 24
Series (E) Refractory Walled Air Curtain Burner (Electric Motor & VFD)
OPERATING MANUAL
VFD SERVICING SPECIFICATIONS
Other than as indicated under Periodic Maintenance, there are no user
-
serviceable
parts. Should the VFD require attention or re
-
programming, a qualified technician
should be engaged to perform this work.
There are no supply voltage (480V) circuit breakers or fuses inside the NEMA enclo-
sure, only three internal control circuit fuses. Call the factory for programming sup-
port.
MOTOR / VFD WIRING
Power:
480V balanced three
-
phase into control box from power pole (grid) and min. 460V
three
-
phase out from control box to electric motor. The motor is rated at 460V to allow
for a voltage drop of approximately 20V by the VFD. The unit can be set to handle ei-
ther 50Hz or 60Hz power.
The S327E is fitted with a 75 HP (56 kW) and the S
-
220E and S
-
100E Series are fit-
ted with a 30 HP (22.4 kW) premium three
-
phase motor.
Rotation:
Rotation is clockwise as viewed from the motor end or counter
-
clockwise as seen from
the main air curtain fan intake from the side of the FireBox. The motor rotation is set at
the factory and the VFD is programmed also at the factory for the proper speed set-
tings (Positions are 0
-
1
-
2
-
3).
NOTICE:
All electrical connections and installations must
be made by a licensed local electrician according to respec-
tive codes and regulations by the competent authorities.