Sinclair SCV-750EB Service Manual page 34

For SCV-1800EB:
Wiring
Component diagram
label
Inverter
BP1/2
compressor
DC fan motor FAN
Electronic
EXV
expansion valve
Four-way valve ST1
5.2 Component control during cooling mode
For SCV-900EB:
Component
Inverter compressor A
Inverter compressor B
DC fan motor A
DC fan motor B
Electronic expansion valve A
Electronic expansion valve B
Electronic expansion valve C
Four-way valve
Solenoid valve (oil balance)
Solenoid valve (defrost)
Solenoid valve (by pass)
Solenoid valve (injection)
Water side heat exchanger
heater
Water flow switch
Water flow switch heater
Crank case heater
For SCV-750EB and SCV-1400EB:
Component
Inverter compressor 1
Inverter compressor 2
Inverter fan1
Inverter fan 2
Electronic expansion valve
32
180kW
●
Controlled according to load requirement from hydronic system.
●
Controlled according to outdoor heat exchanger pipe temperature.
Position (steps) from 0 (fully closed) to 480 (fully open), controlled according to outdoor
●
ambient temperature, discharge temperature, suction superheat, compressor speed and
refrigerant system pressure.
●
On
Wiring diagram label
BP1
BP2
Fan A
Fan B
EXVA
EXVB
EXVC
ST1
SV4
SV5
SV6
SV8A/B
-
Water-SW
-
CCH
75kW
Wiring diagram label
BP1
BP2
FAN1
FAN2
EXV-A
Control functions and states
90kW
●
Controlled according to load requirement.
●
●
Controlled according to ambient temperature and discharge
●
pressure and air side heat exchanger refrigerant temperature.
●
Step 480
Step from 0 to 480. Controlled according to suction temperature
●
superheat.
Step from 0 to 480. Controlled according to temperature
●
difference between economizer plate heat exchanger inlet and
outlet.
●
Closed
●
Open for 3min after every 17min.
●
Closed
●
Closed
●
Open
According to water side heat exchanger anti-freezing
●
temperature.
After water pump (field supplied) is turned on for 2min, if water
flow switch is open, water pump stops and water flow error
●
code appears. The compressor can be started after the water
flow is normal.
Controlled according to ambient temperature, water inlet
●
temperature and water outlet temperature.
Controlled according to ambient temperature and discharge
●
temperature.
140kW
● ●
Control the outlet water temperature. The operating
increased and decreased frequency is 1Hz/s.
● ●
Control according to the exhaust pressure of the
● ●
outdoor unit. Correct every 20-60s, and adjust in
● ●
0-32 gears.
● ●
Step 480.
Control functions and states
Control functions and states