5 Preparation
Installer and user reference guide
10
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P561157-1 – 2018.09
Possible standard combinations of outdoor units
INFORMATION
U-series units cannot share the same refrigerant circuit
with T-series units. However, electrically, U-series units
and T-series units can be connected via F1/F2.
▪ RXYTQ18~48 consist of 2 or 3 RXYTQ8~16 units.
▪ Only the combinations in the table below are allowed.
Continuous heating
RXYTQ18 = R 8
RXYTQ20 = R 10
RXYTQ22 = R 12
RXYTQ24 = R 12
RXYTQ26 = R 12
RXYTQ28 = R 14
RXYTQ30 = R 10 + 10
RXYTQ32 = R 10 + 10
RXYTQ34 = R 12 + 10
RXYTQ36 = R 12 + 12
RXYTQ38 = R 12 + 12
RXYTQ40 = R 14 + 12
RXYTQ42 = R 14 + 14
RXYTQ44 = R 16 + 12
RXYTQ46 = R 16 + 14
RXYTQ48 = R 16 + 16
4.5.4
Possible options for the outdoor unit
INFORMATION
Refer to the technical engineering data for the latest option
names.
Refrigerant branching kit
Description
Model name
Refnet header
KHRQ22M29H
KHRQ22M64H
KHRQ22M75H
Refnet joint
KHRQ22M20T
KHRQ22M29T9
KHRQ22M64T
KHRQ22M75T
For the selection of the optimal branching kit, please refer to
"5.3.3 To select refrigerant branch kits" on page 14
Outdoor multi connection piping kit
Number of outdoor units
Model name
2
BHFQ22P1007
3
BHFQ22P1517
Cool/heat selector
In order to control the cooling or heating operation from a central
location, the following option can be connected:
Description
Model name
Cool/heat changeover switch
KRC19-26A
Cool/heat changeover PCB
BRP2A81
With optional fixing box for the
switch
KJB111A
External control adaptor (DTA104A61/62)
To instruct specific operation with an external input coming from a
central control the external control adaptor can be used. Instructions
(group or individual) can be instructed for low noise operation and
power consumption limitation operation.
PC configurator cable (EKPCCAB)
You can make several commissioning field settings through a
personal computer interface. For this option EKPCCAB is required
which is a dedicated cable to communicate with the outdoor unit.
The
user
interface
software
is
available
on
www.daikineurope.com/support-and-manuals/software-downloads/
Demand PCB (EKRP1AHTA)
To enable the power saving consumption control by digital inputs
you must install the demand PCB.
For installation instructions, see the installation manual of the
demand PCB and addendum book for optional equipment.
5
Preparation
5.1
Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
5.2
Preparing the installation site
5.2.1
Installation site requirements of the
outdoor unit
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the unit's weight and
vibration.
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
▪ Make sure the unit is level.
▪ Select a place where rain can be avoided as much as possible.
▪ Select the location of the unit in such a way that the sound
generated by the unit does not disturb anyone, and the location is
selected according the applicable legislation.
Do NOT install the unit in the following places:
▪ In potentially explosive atmospheres.
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
