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September 1, 1997
Koolgas Relay
To assure proper operation of the rack, it is
required that a compressor be running
when a branch goes into Koolgas Defrost.
The Koolgas Relay contacts are wired
between T9 and T10 of the #1 Compressor
Board only. When any Koolgas Branch
Board calls for defrost, the Koolgas
contacts close, forcing #1 Compressor run.
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T2
T1
T3
S1
T7
K2
T4
K1
T5
T9
T10
Alm
T6
R
Y
P
O
C# Protector
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
K1
Fuse LED
Circuit
K1
R
F1
O
Y
BL
BR
P
T
C# Aux Cont
BR
BL
BL
BL
NO
4
1
2
HP
P
T4 on Branch
Defrost Board
KR
Y
All Koolgas Branches
wired in Parallel thru T4
EPC
(L
V l
)
Figure 4-12 — Koolgas Relay
P/N 401789
T8
K2
G
Power LED
K1
R
Alarm LED
R
Oil LED
H Press LED
Circuit
R
K1
Y
Run LED
B
O
R
W
B
R
Motor Cont Coil
O
120
O
TD
GY
GY
Oil Failure
Koolgas Relay
KR
W
R
BR
O
W
Bypass Solenoid Circui
BP
(Only on AutoSurge)
4 - 17
W
C#
O
X23
X2E
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