Nor-Lake Angled Ice Cream Merchandisers User Manual
Page 9
9
ELECTRICAL CONNECTIONS
The controller is provided with screw terminal block to connect cables with a cross section up to 14 AWG. (2,5 mm
2
).
Before connecting cables make sure the power supply complies with the control’s requirements. Separate the probe
cables from the power supply cables, from the outputs and the power connections. Do not exceed the maximum
current allowed on each relay, in case of heavier loads use a suitable external relay.
PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is
recommended to place the thermostat probe away from air streams to correctly measure the average room
temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where most ice is
formed, far from heaters or from the warmest place during defrost, to prevent premature defrost termination.
SENSOR PROBE TEMPERATURE AND RESISTANCE
Temperature
Resistance
°F
°C
Ohms
-29.2 -34
683,100
-20.2
-29
499,200
-9.4 -23
347,100
-0.4
-18
259,500
10.4 -12
185,200
19.4
-7
141,200
30.2 -1
103,100
32.0
0
97,950
39.2 4
80,040
50.0
10
59,700
60.8 16
45,000
69.8
21
35,820
80.6 27
27,500
89.6
32
22,210
FAN OPERATION AND VIBRATION; VOLTAGE CHECK
Check the operation of the fan blade and also check for vibration noises due to refrigerant lines rattling against one
another. While the cabinet is in operation, check the voltage draw and the amperage draw versus this rating on the
nameplate. Voltage should be checked at the compressor terminals while the compressor is initially starting. The
cabinets are designed to operate at +/- 10% of 115/60/1. This means at time of start-up, the voltage should be
between 103 volts and 126.5 volts at the compressor.
FINAL CHECK LIST
A.
Check operating pressures.
B.
Check electrical requirements of unit to supply voltage.
C.
Set temperature control for desired temperature range.
D.
Check system for proper defrost settings and operation.
E.
Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required.