Heating cartridge check (at contactor) – Southbend StratoSteam STRE-5D User Manual
Page 25
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TRATO
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Figure 14
Heating Cartridge Check (at Contactor)
L1
A
L2
B
L3
C
Top of
Steamer
Ohms
1. DISCONNECT POWER AT CIRCUIT BREAKER.
2. Turn Control Lever to OFF.
3. Remove right side panel of steamer.
4. DO NOT DISCONNECT HEATING-CARTRIDGE LEAD WIRES FOR THIS TEST.
5. Using a multimeter, check the resistance across contactor terminals as specified in the following table:
Model STRE-3D
Model STRE-5D
Allowable Resistance (Ohms)
Allowable Resistance (Ohms)
Three-Phase
Single-Phase Three-Phase
Single-Phase
Serial-
Plate
Voltage
A-B and B-C
A-C
A-C
A-B and B-C
A-C
A-C
208
10 to 12
14 to 16
5 to 6
8 to 10
11 to 13
4 to 5
220
12 to 13
15 to 18
6 to 7
9 to 11
13 to 15
5 to 6
240
14 to 16
18 to 21
7 to 9
11 to 13
15 to 17
6 to 7
480
55 to 64
73 to 85
29 to 34
45 to 52
60 to 70
24 to 28
6. If the measured resistance at the contactor is not in the specified range, disconnect all the heating cartridges
from the contactor. Measure the resistance across the leads each cartridge. Replace any cartridge that
shows either an open or short circuit.