Orion System VCC-X Controller - Manual (Page 43)

VCC-X Controller Technical Guide
VCC-X EXPANSION MODULE 1 WIRING
43
Figure 28: Return Air Bypass Wiring
Return Air Bypass Wiring
Return Air Bypass
The VCC-X Controller can be confi gured for AAON ® Return Air
Bypass applications. These provide improved moisture removal
capabilities while utilizing internal space loads for reheat by
redirecting Return Air around the Evaporator Coil instead of through
the coil. See the AAON
® Return Air Bypass application section of
this manual on page 6 for complete operation details.
The AAON ® Return Air Bypass applications utilize a Return Air
Bypass Damper Actuator and a Return Air Damper Actuator to
modulate the Return Air and Return Air Bypass Dampers to control
the amount of air that is redirected around the Evaporator Coil.
See Figure 28 below for detailed wiring of the Return Air Bypass
and Return Air Damper Actuators.
WARNING: It is very important to be certain that all wiring
is correct as shown in the wiring diagram below. Failure to
observe the correct polarity could result in damage to the
Damper Actuator or the VCC-X Expansion Module.
VCC-X EM1
Expansion Module
WARNING!!
Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-
24VAC. Failure to observe polarity will result in damage to one or more of the
boards. Expansion Modules must be wired in such a way that the expansion
modules and the controller are always powered together. Loss of power to the
expansion module will cause the controller to become inoperative until power is
restored to the expansion module.
AOUT2
24VAC
GND
Line Voltage
Size Transformer For
Correct Total Load.
VCC-X E 1 Module = 5 VA
M
GND
AOUT3
WattMaster Label
#L102196-A
Rev.: 1A
B
+24
VAC GND
RELA
Y
C
ONT
A
CT
RA
TING
IS
1
A
MP
MAX
@
24
V
A
C
R1
R2
R3
R4
R5
RC
RELAY OUTPUT
TERMINALS
ANALOG OUTPUT TERMINALS
GND
RETURN DAMPER
RETURN BYPASS
CHILLED WATER
AOUT4
PWM –
PWM +
E-BUS
CONNECT
24 VAC POWER ONLY
WARNING! POLARITY
MUST BE OBSERVED OR
THE CONTROLLER WILL
BE DAMAGED
POWER INPUT TERMINAL BLOCK
PUT
T
VCC-X Expansion Module 1
Orion No.: OE336-23-VCCXEM1
AAON No.: V53990
RETURN AIR
DAMPER ACTUATOR
2 +
Y1 3
COM 1
RETURN AIR BYPASS
DAMPER ACTUATOR
2 +
Y1 3
COM 1
Belimo Actuator Wiring
Shown. Consult Factory
For Other Manufacturer
Wiring Instructions.