Daikin VRV IV RKXYQ8T7Y1B, Installation And Operation Manual

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3 About the units and options
Installation and operation manual
6
8T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1B – 2016.04
5 HP 8 HP
c Gas Ø15.9 mm Ø19.1 mm
d Liquid Ø9.5 mm Ø9.5 mm
e Piping adapter (Ø19.1→22.2 mm) that you need when
connecting piping to the heat exchanger unit (only for
8 HP)
2.1.2 To remove the transportation stay
Only for RKXYQ5.
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The transportation stay installed over the compressor leg for
protecting the unit during transport must be removed. Proceed as
shown in the figure and procedure below.
1 Slightly loosen the fixing nut (a).
2 Remove the transportation stay (b) as shown in the figure
below.
3 Tighten the fixing nut (a) again.
·
3
1
(10.1 N·m)
2
a
b
2.1.3 To remove the transportation EPS
Only for RKXYQ8.
Remove the EPS. The EPS protects the unit during transport.
3 About the units and options
3.1 About the compressor unit and
heat exchanger unit
The compressor unit and heat exchanger unit are intended for indoor
installation and aimed for air to air heat pump applications.
Specification 5 HP 8 HP
Maximum capacity Heating 16.0 kW 25.0 kW
Cooling 14.0 kW 22.4 kW
Outside ambient
design temperature Heating –20~15.5°C WB
Cooling –5~46°C DB
Ambient design temperature of
compressor unit and heat exchanger
unit 5~35°C DB
Maximum relative
humidity around the
compressor unit and
heat exchanger unit Heating 50%
(a)
Cooling 80%
(a)
(a) To avoid condensation and water dripping out of the unit. If
the temperature or the humidity is beyond these conditions,
safety devices may be put in action and the air conditioner
may not operate.
3.2 System layout
NOTICE
Design of the system must not be done at temperatures
below –15°C.
d d
c c
a
b
VRV DX VRV DX VRV DX EKEXV
AHU
d d
1 2
1 In case of VRV DX indoor units
2 In case of VRV DX indoor units combined with an air
handling unit
a Heat exchanger unit
b Compressor unit
c Refrigerant piping
d User interface (dedicated depending on indoor unit type)
VRV DX VRV direct expansion (DX) indoor unit
EKEXV Expansion valve kit
AHU Air handling unit
3.3 Combining units and options
3.3.1 Possible options for the compressor unit
and heat exchanger unit
For more possible options, see the installer and user reference
guide.
Cool/heat selector
In order to control the cooling or heating operation from a central
location, the following option can be connected:
Description 5 HP 8 HP
Cool/heat selector switch KRC19-26A
Cool/heat selector cable EKCHSC —
Cool/heat selector PCB — BRP2A81
(a)
With optional fixing box for the
switch KJB111A
(a) To install BRP2A81, proceed as follows:
1 Check the components of BRP2A81. You do NOT need all of
them.
1× 1× 1× 1× 1× 1×
X b c a
1×
X X X