12 About the units and options
Installation and operation manual
16
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546221-1B – 2020.10
12
About the units and options
12.1
About the outdoor unit
This installation manual concerns the VRV IV, full inverter driven,
heat pump system for replacement purposes.
Depending on the situation, the existing refrigerant piping of a
previous installation, or in some cases even indoor units, can be
reused.
Model line up:
Model
Description
RXYQQ8~20
Single unit model.
RXYQQ22~42
Multi unit model (consisting of 2 or 3
RXYQQ* modules).
Depending on the type of outdoor unit which is chosen, some
functionality will or will not exist. It will be indicated throughout this
installation manual and brought to your attention. Certain features
have exclusive model rights.
These units are intended for outdoor installation and aimed for heat
pump applications including air to air.
These units have (in single use) heating capacities ranging from 25
to 63 kW and cooling capacities rating from 22.4 to 56 kW. In multi
combination the heating capacity can go up till 132 kW and in
cooling till 118 kW.
The outdoor unit is designed to work in heating mode at ambient
temperatures from –20°C WB to 15.5°C WB and in cooling mode at
ambient temperatures from –5°C DB to 43°C DB.
12.2
System layout
NOTICE
Design of the system must not be done at temperatures
below –15°C.
a
e
c
d
d
c
b
a
VRV IV replacement heat pump outdoor unit
b
Refrigerant piping
c
VRV direct expansion (DX) indoor unit
d
User interface (dedicated depending on indoor unit type)
e
Cool/Heat changeover remote control switch
13
Unit installation
13.1
Preparing the installation site
13.1.1
Installation site requirements of the
outdoor unit
Mind the spacing guidelines. See the "Technical data" chapter.
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation
in
a
commercial
and
light
industrial
environment.
NOTICE
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
13.1.2
Additional installation site requirements
of the outdoor unit in cold climates
NOTICE
When operating the unit in a low outdoor ambient
temperature with high humidity conditions, make sure to
take precautions to keep the drain holes of the unit free by
using proper equipment.
In heating:
T
AO
(°C WB)
a
b
20
15.5
15
10
5
0
–5
–10
–15
–20
10
15
20
25 27 30
T
AI
(°C DB)
a
Warming up operation range
b
Operation range
T
AI
Ambient indoor temperature
T
AO
Ambient outdoor temperature
If the unit has to operate for 5 days in this area with
high humidity (>90%), Daikin recommends to install the
optional heater tape kit (EKBPH012TA or EKBPH020TA)
to keep the drain holes free.
13.2
Opening the unit
13.2.1
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
