Wiring Schematics - Greenheck MiniCore Series Installation, Operation And Maintenance Manual

Wiring Schematics

Timed Exhaust Frost Control
TR
115/208/230V PRIMARY
24V SECONDARY
R
COM
FIELD MOUNT
IN OUTDOOR TH
AIR DUCT
NO
B1
T1
A1 A2
REMOTE PANEL
Motor Potentiometer/0-10 VDC Fan Motor Control
VERIFY BLOWER MOTOR VOLTAGE MATCHES LINE VOLTAGE
110-120V 50/60HZ, 208-230/277V 50/60HZ
L1
L2 (NEUTRAL)
L2 L1
®
GROUND
VIOLET
115
RED
208
ORANGE
230
BLACK
L2
T1
T
16
15
GROUND
POT A
SEE NOTE 1:
BLACK
2CBL-MA
RED
2CBL-MA
BLACK
A-
0-10VDC
SEE NOTE 2:
ORANGE
A+
SEE NOTE 3:
BLACK
A
WHITE
POT B
SEE NOTE 1:
BLACK
2CBL-MB
RED
2CBL-MB
BLACK
B-
0-10VDC
SEE NOTE 2:
ORANGE
B+
SEE NOTE 3:
BLACK
B
WHITE
FIELD TO CONNECT
TO TERMINAL DESIGNATED
WITH UNIT LINE VOLTAGE
CONNECT TERMINAL 15
FROM COMPONENT "T1"
WITH LINE VOLTAGE
SEE NOTE #3
MAIN UNIT
INTERNAL JUNCTION BOX
RED
CLOSED 115-120V
OPEN 208-230/277
RED
MA
BLOWER MOTOR A
RED
CLOSED 115-120V
OPEN 208-230/277
RED
MB
BLOWER MOTOR B
L1
L2
A OR B
L1
Legend
MA Blower Motor A
MB Blower Motor B
POT Potentiometer (located in control center)
T1 Frost Control Timer
Typical Settings: t1 (OFF) = 5 min.
t2 (ON) = 30 min.
TH Thermostat; non-adjustable 5° setting.
Required to be mounted in outdoor air duct.
TR Transformer
NOTE 1: Potentiometer is mounted
in control center. Turn dial for speed
adjustments to motor.
NOTE 2: 0-10 VDC fan motor
control by others. For 0-10 input,
potentiometer must be set to 0.
0-1.9 VDC fan motors are off
2 VDC - minimum speed
ON threshold
(from previous off) - 2 VDC
OFF threshold
(from previous on) - 1.5 VDC
10 VDC - maximum speed
If one 0-10 VDC signal is present
for both motors, place a jumper
between the following terminals.
(A+ and B+) and (A- and B-)
NOTE 3: If frost control panel
accessory is installed, determine
if Blower Motor A or B controls
the supply fan and remove
jumper wire between L1 and
supply motor.
Energy Core Ventilator
9