Helmer Scientific i.Series
®
and Horizon Series
™
Refrigerator - Pass-Thru
Service and Maintenance Manual
360429/A
63
THESE DRAWINGS AND SPECIFICATIONS ARE THE SOLE PROPERTY OF HELMER INC. AND SHALL NOT BE REPRODUCED OR
USED AS THE BASIS FOR MANUFACTURE OR SALES OF APPARATUS WITHOUT THE APPROVAL OF HELMER INC.
L1-3
(HC)
EXTERIOR
ALARM
CONTACTS
COM
NO
NC
CHART
RECORDER
*Option
CHART
RECORDER
PROBE
9V
CHART
RECORDER
BATTERY BACKUP
(CA)
(CB)
(CC)
AUDIBLE
ALARM
(HF)
INTERFACE
CABLE
(HG)
9V
BACKUP
BATTERY
ALARM
SWITCH
(HE)
DISPLAY BOARD
(HH)
-+
°C
°F
T
E
S
E
D
O
M
+
-
-
+
ALARM
DISABLE
-VDC
+VDC
(K)
COMPRESSOR
(I)
CONDENSING UNIT
FAN MOTOR
COMPRESSOR
INVERTER
(J)
L1-6
L2-6
6
L2-4
DOOR
SWITCHES
(O)
C
O
M
N
.O
.
C
O
M
N
.O
.
C
O
M
N
.O
.
C
O
M
N
.O
.
-
+
CONTROL BOARD
(HA)
(P)
Br
ow
n
O
ra
ng
e
(HI)
To Unit Cooler Fan Motor
Ye
llo
w
Monitor Probe
Control Probe
(HB)
2
N/L2
L1
+VDC
-VDC
L1-2
L2-2
DC POWER
SUPPLY
(HD)
Lighting Power Supply
(M)
L2-4
L1-4
Double Door Only
INTERIOR LIGHT(S)
(N)
LIGHT SWITCH
(HJ)
Double Door
Only
CONDENSATE FAN
DC MOTOR
(L)
MUTE
CONTROL
MONITOR
HIGH TEMP
LOW TEMP
DOOR ALARM
Horizon Series