For The User; 13 About The System; System Layout; User Interface - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

13 About the system

For the user

13 About the system
The indoor unit part of VRV IV heat pump system can be used for
heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
In general following type of indoor units can be connected to a VRV
IV heat pump system (not exhaustive list, depending on outdoor unit
model and indoor unit model combinations):
▪ VRV direct expansion indoor units (air to air applications).
▪ RA direct expansion indoor units (air to air applications).
▪ Hydrobox (air to water applications): HXY080/125 only.
▪ AHU (air to air applications): EKEXV-kit is required.
▪ Aircurtain -Biddle- (air to air applications).
Combination of VRV direct expansion indoor units with RA direct
expansion units is allowed.
Combination of VRV direct expansion indoor units with Hydrobox
units is allowed.
Combination of VRV direct expansion indoor units with RA direct
expansion unit(s) and Hydrobox unit(s) is NOT allowed.
In case AHU or Aircurtain are used, no Hydrobox may be connected.
Hydrobox only connection to VRV IV heat pump outdoor unit is not
allowed.
Airhandling unit connection in pair to VRV IV heat pump outdoor unit
is supported.
Airhandling unit connection in multi to VRV IV heat pump outdoor
unit is supported, even combined with VRV direct expansion indoor
unit(s).
Single (continuous heating/non-continuous
combinations: restrictions exist.
Multi (continuous heating/non-continuous heating) unit combinations:
restrictions exist.
For more specifications, see technical engineering data.
13.1

System layout

Your VRV IV heat pump series outdoor unit can be one of following
models:
Model
RYYQ Single continuous heating model.
RYMQ Multi continuous heating model.
RXYQ Single and multi non-continuous heating
model.
Installer and user reference guide
60
heating) unit
Description
Depending on the type of outdoor unit which is chosen, some
functionality will or will not exist. It will be indicated throughout this
operation manual when certain features have exclusive model rights
or not.
a
i
b c d c
g g
a VRV IV Heat pump outdoor unit
b Refrigerant piping
c VRV direct expansion (DX) indoor unit
d VRV LT Hydrobox (HXY080/125)
e BP box (required to connect Residential Air (RA) or Sky Air
(SA) direct expansion (DX) indoor units)
f Residential Air (RA) direct expansion (DX) indoor units)
g User interface (dedicated depending on indoor unit type)
h User interface (wireless, dedicated depending on indoor
unit type)
i Cool/heat changeover remote control switch
14

User interface

CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual will give a non-exhaustive overview of the
main functions of the system.
Detailed information on required actions to achieve certain functions
can be found in the dedicated installation and operation manual of
the indoor unit.
Refer to the operation manual of the installed user interface.
15

Before operation

WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
NOTICE
Never inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
CAUTION
It is not good for your health to expose your body to the air
flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
e c c
f
g g g
h
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09