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20 SysAqua
11.2.2. WIRING DIAGRAM KEY DESCRIPTIONS
11.2.2.1. POWER SUPPLY DIAGRAMS
11.2.2.2. CONTROL AND REGULATION DIAGRAMS
QG : main section switch
KA1 : three-phase network control relay (phase sequence and cut-out)
FT1/2 : M1/2 compressors magneto-thermal circuit breaker
K1/2 : M1/2 compressors power circuit contactor
M1/2 : compressors 1 and 2
R1/2 : M1/2 compressors crankcase heater
FTC : control circuit magneto-thermal circuit breaker
FTOF-L : outdoor fans magneto-thermal circuit breaker
FTOF-H : outdoor fans magneto-thermal circuit breaker
KOF : outdoor fans power contactors
KOF-L : outdoor fans power contactors
KOF-H : outdoor fans power contactors
OF1/2 : outdoor fan motor
S1 : compressor internal safety device 1
PCB : CHILLER regulation
T1 : CHILLER regulation transformer
FT1/2 : 1 and 2 compressors additional magneto-thermal circuit breaker
FTOF-L : outdoor fans additional magneto-thermal circuit breaker
FTOF-H : outdoor fans additional magneto-thermal circuit breaker
FOF1/2 : outdoor fans motors internal protection
FS : ow switch
WPS : water low pressure switch (option)
KHP : high pressure safety relay
HP : automatic reset high-pressure pressostats
K1/2 : M1/2 compressors power circuit contactor
RAG : antifreeze electric heater
RV1 : 4-way cycle changeover valves (option)
KA1 : three-phase network control contactor
FPE : pressure transducer (low pressure)
FPC : pressure transducer (high-pressure)
OCT : de-icing temperature probe
OAT : outdoor temperature probe (air)
CDT : high discharge temperature probe
EWT : inlet water temperature probe
LWT : outlet water temperature probe
S1 : compressor internal safety device 1
SM1 : ON/OFF switch
SD/N : switch day / night (not supplied)
SS/W : switch summer / winter (closed in winter) (not supplied)
11.2.2.3. OPTION PUMP
WP1 : water pump
KWP1 : water pump motor power contact (option)
FTWP : water pump motor magnetothermal circuit breaker (option)
11.2.2.4. OPTION DUAL PUMPS
WP2 : water pump
FTWP : water pump motor magnetothermal circuit breaker
KWP2 : water pump motor power contact
SWP : selector of pump 1 or 2
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