Sub-Zero Mega Chill User Manual

10 11
3.7 Connections
8 way LAN cable
Chiller Interface Terminal for panel mounting
Input/Output Board
2 COMPRESSOR2 COMPRESSOR
ALL FUSE = 1.5Amp
FUSE
FUSE
C
NO
FUSE
NC
PUMP
COND.1
COMP.2
COND.2
C
NO
COMP.1
C
NO
C
NO
C
NO
C
NO
FUSE
FUSE
WATER SV
FUSE
To Display
AC1 AC2
TRANSFORMER
~ ~
9V
10V
PUMP DOWN SV2 PUMP DOWN SV1
FUSE FUSE
ALARM
C
NO
C
NO
C
NO
FUSE
HIGH
MED
LOW
LIQ
LEVEL
SENSOR
ANTI FREEZE
WATER IN
COND OUT
COND IN
CONTROL
WATER OUT
TRIP SIGNAL
B PHASE
Y PHASE
R PHASE
HP1
LP1
COMP1 O/L
OSS1
HP2
LP2
COMP2 O/L
OSS2
COND1 O/L
COND2 O/L
EWFS
SPP
NEUTRAL
PUMP O/L
SENSOR
COMPRESSOR2 ON
MED. LIQUID LEVEL
29.5
LIQ
LEVEL
SWITCH
OR
MED
LOW
REF.

Sub-Zero Mega Chill Specifications

Operating Environment

operating temperature	-50 C to +50 C0
storage temperature	-20 C to + 70 C
operating humidity	Max 80% (non-condensing)
storage humidity	Max 80% (non-condensing)

Power

max continuous input voltage	230 Vac
input current (closed contact)	10 mA
transformer primary input	230Vac, 50Hz
transformer secondary output 1	9Vac, 350mA
transformer secondary output 2	10Vac, 500mA

Digital Output (Relay)

type	SPDT
contacts	C & NO (C, No, NC for compressor)
rating	250 Vac, 5A(resi)

Analog Inputs

sensor type	Japanese NTC thermistors
specification	10K @ 25 C0
resolution	0.5 C0
accuracy	+/- 1 C0