Mitsubishi Electric t-NEXT DF DX 011 P1 S, Manual, Page: 36 / 92

t-NEXT DF DX
T_tNEXTDFDX_0719_EN
36
MEHITS S.p.A.
DATA BOOK
R1
EVP
RU
C1
BPH1
BPL1
IP
VE
IP
FG
VE1
CND1
RU
RU
RU
T2
SPH1
YR
2
RL
VS
YR
1
T1
M1
DF
Tin
OPTIONAL ACCESSORIES: P171 – KIT FOR AIR -45°C MCH AXIAL AC
OPTIONAL ACCESSORIES: P172 – KIT FOR AIR -45°C AXIAL AC
P171
– LOW TEMPERATURE KIT MCH AXIAL AC (GR-Z A B 50)
P172 – LOW TEMPERATURE KIT AXIAL AC (T-MATE DX-A STD)
The optional is available only for air conditioners matched with remote air-cooled condensers with axial
fans with AC electric motors:
•
T-MATE DX-A STD . Condensing coil with copper tubes and aluminium fins. Standard
acoustic version, up to M140 model included.
•
GR-Z A B 50 . Condensing coil with microchannel coils.
Standard acoustic version.
The system is necessary for the correct machine start up and operation with very low ambient air
temperatures: between -20°C and -45°C.
Components for each refrigerant circuit:
•
A check valve (YR
1
), supplied in kit. The valve must be installed indoor, near to the air
conditioner, on the liquid line on the return of the remote condenser. This valve avoids the
migration of the refrigerant at liquid state in presence of very low ambient air condition.
•
A check valve (YR
2
), with controlled opening, installed in factory within the unit. It limits the
pressure raising on the liquid pipe between the expansion valve and the check valve (YR
1
).
Electrical components installed on the electric board of the indoor unit, only for optional accessory P172
LOW TEMPERATURE KIT AXIAL AC (T-MATE DX-A STD):
•
Electronic phase-cut regulators for fans speed control;
•
Terminals for electric connections to the remote condenser;
•
Electrical power supply for remote condenser from the indoor machine electrical board.
The optional “P172 Kit for air - 45°C axial AC” requires mandatory accessory “P191 Power suppl y for
condenser”.
LEGENDA
C1
Compressor
R1 Crankcase heater
CND Condenser.
EVP Evaporator.
DF Dual Fluid coil.
M1 Dual Fluid 2-way valve.
BPH High pressure transducer.
BPL Low pressure transducer.
SPH High pressure switch
VS Pressure relief valve on model:
041 / 045 P1 S
075 / 082 / 092 / 102 P2 D
117 / 146 P4 D
FG Refrigerant filter.
IP Sight glass.
VE Expansion valve.
T Temperature probes.
RU Valves
RL Liquid receiver
YR1 Check valve to be installed on the
liquid line close to the machine
inside the room
YR2 Unidirectional check valve with
controlled opening that limits
pressure rising on the liquid line
Optional,
supplied in kit
Optional