Tightening Of The Electrical Connections - Carrier AquaForce PUREtec 30XWHPZE 301 Installation, Operation And Maintenance Instructions

12 - STANDARD MAINTENANCE

12.2 - Tightening of the electrical connections

12.2.1 - Tightening torques for the main electrical
connections
Screw type
Screw on bus bar, customer connection
M10
M12
Soldered screw PE, customer
connection (M12)
Screw on fused disconnect inlet zones
Fused disconnect 1034061/M10, customer
connection L1/L2/L3
Fused disconnect 1034061/M12, Y/D outlet
Fused disconnect 3KL7141
Fused disconnect 3KL7151
Tunnel terminal screw, compressor contactor
Contactor 3RT104-
Contactor 3RT105-
Contactor 3RT106-
Tunnel terminal screw, current transformer
Size 2 (3RB2966-)
Compressor earth terminal in the power wiring control box
M12
Compressor phase connection terminals
M12
M16
Compressor earth connection
Tunnel terminal screw, water pump disconnect
Disconnect switch 3RV101-
Disconnect switch 3RV102-
Disconnect switch 3RV103-
Tunnel terminal screw, water pump contactor
Contactor 3RT102-
Contactor 3RT103-
32
Torque
Designation
value,
in the unit
N·m
L1/L2/L3 40
L1/L2/L3 70
PE 70
L1/L2/L3 40
QS10- 70
QS10- 70
QS10- 70
KM- 5
KM- 11
KM- 21
TI- 11
Gnd 70
25
1/2/3/4/5/6 on EC- 23
1/2/3/4/5/6 on EC- 30
Gnd on EC- 25
QM90- 2,5
QM90- 2,5
QM90- 4
KM90- 2,5
KM90- 4
12.2.2 - Connection precautions for the compressor
power terminals
These precautions must be applied during an intervention that
requires the removal of the power conductors connected to the
compressor supply terminals.
The tightening nut of terminal (6) supporting the isolator (7) must
never be loosened, as ist ensures terminal tightness and
compressor leak tightness.
The tightening of phase lug (4) must apply the torque between
counter nut (5) and tightening nut (3): during this operation a
counter-torque must be applied at counter nut (5). Counter-nut (5)
must not be in contact with the tightening nut of terminal (6).
Legend
B Torque application to tighten the lug
C Avoid contact between the two nuts
D Lug tightening nut
E Flat lug
F Counter-nut
G Terminal tightening nut
H Isolator
12.2.3 - Connection precautions for the power
contactors
These precautions must be applied for the circuit equipped with
06TVW819 or 06TVA680 compressors. For this compressor, the
power contactor type is 3RT1064 (Siemens).
The contactors allow two connection positions in the cage clamps.
But only one position allows safe and reliable tightening on the
contactor (KM1 or KM2). The conductor must be positioned in
front of the connection area when it is tightened. If it is tightened
behind the area, there is a risk that the brackets will be damaged
during the tightening.
COMPULSORY conductor position
Conductor position NOT ALLOWED