McQuay 5MDS 50, Руководство по установке

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26 Installation Manual IM-MDS_(i)
REFRIGERANT CHARGING SKETCH
weighbridge
refrigerant
tank
compound
pressure gauge
HI
LO
to indoor unit
to indoor unit
service port
ball valve
liquid pipe
gas pipe
ball valve
outdoor
unit
refrigerant
tank
weighbridge
LO
HI
compound
pressure gauge
outdoor
unit
ball valve
gas pipe
liquid pipe
ball valve
service port
to indoor unit
to indoor unit

When charging R410A with cylinder which is without the siphon pipe, turn the cylinder upside down when
charging to ensure only liquid refrigerant is charged into the system.
9.0 Commissioning
9.1 Checking list before commissioning

Ampere of indoor & outdoor units is normal and under protection value?

Power supply for indoor and outdoor units is normal?

Dip switch address setting up for indoor units are ok?

Indoor unit is power on?

Communication wiring is ok?

Refnet is well installed?

Condensing water drainage system is ok?

Earthing is ok?

Insulation testing (10Mega Ω)

Power supply check (220-240V/380-415V)

System has been vacuumed and charged with additional refrigerant?

How many indoor units are controlled by outdoor unit controller?

Outdoor unit ball valve is opened?
9.2 Commissioning record table

Before commissioning, power on the system 24 hours in advance to preheat the crankcase heater.
No.
Suction
pressure(bar)
Discharge
pressure
(bar)
Voltage
(V)
Ampere
(A)
Suction
temperature
(
℃
)
Ambient
Temp.(
℃
)
Checking person
/ Time
1
2
3
4
5
6
9.3 Common problems during commissioning
Symptoms Wiring controller Possible reason
No heating or cooling Cannot select cooling or heating
When one indoors units in heating, all
indoors in heating mode
Fan stop when heating Defrost Fan stop running when defrosting
Pump keep running No indication Pump keep running to drain the water
The cylinder had Syphon pipe
Syphon pipe