Branch Provider (Bp) Unit - Daikin RMXS-L Series Service Manual

SiUS181631EA
1.2

Branch Provider (BP) Unit

No. in
Symbol
diagram
Electronic expansion valve
A EVU
(for operating room)
Electronic expansion valve
B EVT
(for non-operating room)
Electronic expansion valve
C EVH
(Bypass)
DGA
1 ~ DGC Thermistor (Gas pipe)
DLA
2 Thermistor (Liquid pipe)
~ DLC
Thermistor
3 R1T
(Room temperature)
Thermistor
4 R2T
(Indoor heat exchanger)
Thermistor
5 R1T
(Room temperature)
Thermistor
6 R2T (Indoor heat exchanger 1:
liquid pipe)
Thermistor
7 R3T
(Indoor heat exchanger 2)
To
outdoor
unit
Refrigerant Circuit
Name
Among EVA, EVB and EVC, the electronic expansion valve of operating room is called
EVU.
Among EVA, EVB and EVC, the electronic expansion valve of stopping room is called
EVT.
During oil return operation, used to adjust the refrigerant circulating rate of the indoor unit.
During cooling operation, used to carry out the indoor unit SH control and cooling gas pipe
isothermal control.
During heating operation, used to carry out the indoor unit SC control.
Used to detect room air temperature and instruct the capacity supply to the BP unit.
Used to detect heat exchanger temperature and carry out various protection functions and
controls of capacity.
Used to detect room air temperature and instruct the capacity supply to the BP unit.
Used to detect heat exchanger temperature and carry out various protection functions and
controls of capacity.
Used to detect heat exchanger temperature and carry out various protection functions and
controls of capacity.
EV (C)
H
(A) (B)
Filter
EV
EV
EV
Filter
Major Function
(1)
(2)
A
Filter
B
Filter
C
Filter
Refrigerant Circuit
(3)
(4)
RA indoor unit
(5)
(7)
(6)
SA indoor unit
(Q0403)
43