13
ZB Series
Compressor Supply Voltage Troubleshooting
• Remove phase sensing leads from the module from L1/L2/L3.
• Use a voltmeter to measure the incoming 3 phase voltage on L1/L2/L3.
WARNING: L1/L2/L3 could be at a potential up to 600VAC.
• Ensure proper voltage on each phase.
• Remove power to the module for a minimum of 5 seconds to reset and
replace all wire leads. Reenergize the module. If the M1-M2 contacts
are open with proper voltage to T1-T2, L1/L2/L3 and proper resistance
to S1-S2 then the module is faulty and should be replaced.
6. Field & Installation Guidelines
6.1 Assembly Line And Field Brazing
ZB Scroll compressors are available with stub tube and Rotalock
connections. The stub tube version has copper plated steel suction and
discharge fittings. Due to the different thermal properties of steel and
copper, brazing procedures may have to be changed from those commonly
used The guidelines below gives a description for assembly line and field
brazing procedures.
New Installations
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Application Guide
Table 4
Technical Data Summary Of Module
Emerson P/N 071-0641-00
Manufacturer P/N Kriwan 69SU Kriwan 69SU
T1-T2 Module Power
Voltage Supply 120V & 240V
Frequency 50Hz & 60Hz
M1-M2 Module Output Contacts
Maximum Voltage 250VAC
Maximum Current 5 Amps
Minimum Current 100 milliamps
Relay Output 5 A, 300 VA
Power Output <3 VA
S1-S2 Thermal Protection
Trip Out Resistance 4500W ± 20%
Reset Resistance 2750W ± 20%
Reset Time 30 min ± 5 min
Manual Reset T1-T2 interrupt for minimum of 5 sec
L1-L2-L3 Phase Monitoring
Phase Sensor Non Phase Sensing
Phase Monitoring Circuit Rating Non Phase Sensing
Trip Delay Non Phase Sensing
Lockout Non Phase Sensing
Reset For Lockout Non Phase Sensing
321
Figure 2
The copper-coated steel suction and discharge tubes on scroll
compressors can be brazed in approximately the same manner as any
copper tube.
Recommended brazing materials: Any silfos material is recommended,
preferably with a minimum of 5% silver. However, 0% silver is acceptable.
Be sure compressor tube fittings I.D. and connecting tube O.D. are clean
prior to assembly. If oil film is present wipe with denatured alcohol,
Dichloro-Trifluoroethane or other suitable solvent.
Using a double-tipped torch apply heat in Area 1. As tube approaches
brazing temperature, move torch flame to Area 2.
Heat Area 2 until braze temperature is attained, moving torch up and
down and rotating around tube as necessary to heat tube evenly. Add
braze material to the joint while moving torch around joint to flow
braze material around circumference.
After braze material fl ows around joint, move torch to heat Area 3.
This will draw the braze material down into the joint. The time spent
heating Area 3 should be minimal.
As with any brazed joint, overheating may be detrimental to the
final result.
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