A
PPLICATION
GUIDELINES
11
FRCC.PC.017.A1.02
E
LECTRICAL
DATA
,
CONNECTIONS
AND
WIRING
Nominal capacitor value
The Performer
®
Heat Pump scroll compressors
will only operate properly in a single direction.
Use a phase meter to establish the phase orders
and connect line phases L1, L2 and L3 to terminals
T1, T2 and T3, respectively. For three-phase com-
pressors, the motor will run equally well in both
directions. Reverse rotation results in excessive
noise; no pressure diff erential between suction
and discharge; and suction line warming rather
than immediate cooling. A service technician
should be present at initial start-up to verify that
supply power is properly phased and that com-
pressor and auxiliaries are rotating in the correct
direction.
Performer
®
Heat Pump scroll compressors are de-
signed to operate for a maximum of 150 hours in
reverse, but as a reverse rotation situation can go
unnoticed for longer periods, phase monitors are
recommended.
At brief power interruptions, reverse rotation can
occur with single phase compressors. In this case
the internal protector will stop the compressor.
It will have to cool down and will restart safely
afterwards.
For three-phase applications the voltage meas-
ured at the compressor terminals for each phase
should be within ± 2% of the average for all
phases.
Phase sequence and
reverse rotation
protection
Voltage imbalance
Internal motor protection
The Performer
®
Heat Pump scroll compressors
are equipped with an internal line break protector
mounted on the motor windings. The protector is
an automatic reset device, containing a snap ac-
tion bimetal switch.
Internal protectors respond to over-current and
overheating. They are designed to interrupt mo-
tor current under a variety of fault conditions,
such as failure to start, running overload, and fan
failure.
If the internal overload protector trips out, it must
cool down to about 60°C to reset. Depending on
ambient temperature, this may take up to several
hours.
In single-phase compressors, internal protectors
guard against external miswiring, such as revers-
ing electrical connections to the Run (R) and Start
(S) terminals. In three-phase compressors the in-
ternal protectors provide protection during sec-
ondary single-phase conditions (loss of phase).
If start assist is required, in case of operating be-
low the nominal voltage, a CSR starting device is
required.
During start-up, the start winding (C-S) is ener-
gised through an electromagnetic potential relay
and a start capacitor.
A permanent (run) capacitor is wired between the
start winding (C-S) and the run winding (C-R).
CSR wiring
PSC wiring
Run capacitor
HHP015T5LP6
40
HHP019T5LP6
60
HHP021T5LP6
60
HHP026T5LP6
70
HHP030T5LC6
50
HHP038T5LC6
55
Start
Capacitor
Potential
Relay
1
2
5
C
S
R
Line
Run
Capacitor