Wiring Diagrams - Riello NexPolar Series Installation And Technical Service Instructions

INSTALLATION

2.12 Wiring diagrams

PoWEr CIrCUIT
A001 Variable speed drive
A002 Main electronic board
A2 Control panel
BP1 Low pressure probe
CM Compressor
EH1 Plate exchanger heating ele-
ment
EH90 Hydronic module heating ele-
ment
EP90 Circulation pump
FM1 Fan motor
FM2 Fan motor
FR90 Circulation pump thermal
relay
FT1 Compressor casing
thermostat
KM90 Circulation pump
probe
PMV1 Expansion valve motor
electronic
PMV2 Expansion valve motor
electronic
QS100 Main disconnect
switch
RT1 Delivery temperature probe
system
RT2 System return temperature
probe
SP1F High pressure-switch
TC Transformer
TD Delivery temperature probe
failure
22
TE Finned coil temperature
probe
LT Finned coil temperature
probe
TO External air temperature probe
TR Refrigerant temperature probe
TS Suction temperature
probe
YV21 2-way solenoid valve
YV41 Cycle reversal valve
148C/D Not available
Y 3-way valve for DHW