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VCCX2 Controller Technical Guide
Subcool Monitor Wiring
The ASM02350 Subcool Monitor reads the liquid line pressure
and then converts it to saturated liquid temperature and compares
it to the measured liquid line temperature to calculate subcooling.
The use of the Subcool Monitor Module is optional.
The Subcool Monitor is connected to the VCCX2 Controller.
One or two Subcool Monitors can be connected, depending on
the size of the system:
• One Subcool Monitor Module is used when three
RSMZ’s are used
• Two Subcool Monitor Modules are used when six
RSMZ’s are used.
The Subcool Monitor contains a 2 x 8 LCD character display
and four buttons that allow for conguration, status, and alarm
display. This module must be congured to work with R410-A
refrigerant and is congured for 667 PSI liquid line pressure
transducers.
The Subcool Monitor must be connected to an 18-30 VAC power
source.
See Figure 40, this page for wiring.
WARNING: Observe Polarity! All boards must be wired
with GND-to-GND and 24 VAC-to-24
VAC. Failure to observe polarity will result
in damage to one or more of the boards.
1
0
A
2
5
0
V
A
C
~
5
A
3
0
V
D
C
S
A
V
D
E
G
5
Q
-
1
A
4
O
M
R
O
N
D
C
1
2
V
C
H
I
N
A
BK
RD
WH
BK
RD
WH
BK
RD
WH
18-30 VAC
GND
Line Voltage
Size Transformer For Correct Total Load.
Subcool Monitor Controller = 18 VA
Liquid Line
Pressure
Transducer 1
Liquid Line
Pressure
Transducer 2
Liquid Line
Pressure
Transducer 3
Liquid Line Temp
Sensor #2
Sensor #1
Liquid Line Temp
Sensor #3
Liquid Line Temp
ALARM
UP
DOWN
ENTERMENU
Figure 40: Subcool Monitor Wiring
WIRING
Subcool Monitor Module
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