Daikin VRV IV+, Installer And User Reference Manual

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13 | About the system
Installer and user reference guide
137
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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 heating) unit 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 Description
RYYQ Single continuous heating model.
RYMQ Multi continuous heating model.