Magic Aire HCA 04, Installation, Operation And Maintenance Manual

Page: 10 / 30

035-000049-001 Page 10 HCA IOM 1.1 8-28-2017
INSTALLATION-ELECTRICAL (cont’d)
TYPICAL WIRING DIAGRAMS—
Control Option “C”
Four User-Adjustable Speeds
NOTES:
1. This diagram represents the factory-installed
electrical option with 4 user-adjustable speeds.
2. Typical wiring is shown. For exact wiring, refer
to the wiring diagram provided with the unit.
3. Field wiring includes power wiring (upper left
hand corner) and low voltage control wiring
(terminal block TB1).
4. Units ordered for 208V-240V voltage selection
are factory wired for 240V. Field may rewire
transformer primary tap for operation at 208V.
5. Selection of field provided and installed electri-
cal components is the responsibility of the in-
staller, including branch circuit protection and
wiring.
6. To start the fan, connect R and G1 or G2 or G3
to energize fan at each respective speed. Add
connection to terminal “FLO4” on the control
board (EVOECM-4SPD) to enable a fourth
speed. Adjust each fan speed using potentiom-
eter control on the control board. Speed adjust-
ments can be made while the fan is running.
WARNING: Hazardous voltage!
7. The control power (R and C at terminal
block TB1) can be used to power a stand-
ard 24VAC thermostat , DX relay and up to
2ea control valves. NOTE: Factory trans-
former is 40VA, so use caution when con-
necting multiple loads to the 24VAC control
circuit.
8. Optional condensate switch (CNS) factory
option interrupts 24VAC to thermostat (R)
and controls when water level rises to pre-
set sensor level in the drain pan.
9. Optional current switch (CRS) factory op-
tion makes upon current flow to the motor.
Utilize as a dry contact for control system
alarms as needed.