System Layout; Before Operation; User Interface; Operation Range - Daikin RYYQ8T7Y1B Installation And Operation Manual

2.2.

System layout

Your VRV IV heat pump series outdoor unit can be one of following
models:
 RYYQ: Single continuous heating model.
RYMQ: Multi continuous heating model.

RXYQ: Single and multi non-continuous heating model.

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.
1
9
2 3 4
7 7
1 VRV IV Heat pump outdoor unit
2 Refrigerant piping
3 VRV direct expansion (DX) indoor unit
4 VRV LT Hydrobox (HXY(080/125))
5 BP box (required to connect Residential Air (RA) or Sky Air
(SA) Direct Expansion (DX) indoor units)
6 Residential Air (RA) Direct Expansion (DX) indoor units)
7 User interface (dedicated depending on indoor unit type)
8 User interface (wireless, dedicated depending on indoor
unit type)
9 Cool/Heat changeover remote control switch
3.

Before operation

This operation manual is for the following systems with standard
control. Before initiating operation, contact your dealer for the
operation that corresponds to your system type and mark. If your
installation has a customized control system, ask your dealer for the
operation that corresponds to your system.
Operation modes (depending on indoor unit type):
Heating and cooling (air to air).

Fan only operation (air to air).

Heating and cooling (air to water).

Dedicated functions exist depending on the type of indoor unit, refer
to dedicated installation/operation manual for more information.
4.

User interface

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.
Installation and operation manual
55
3 5 3 3
6
7 7
8
5.

Operation range

Use the system in the following temperature and humidity ranges for
safe and effective operation.
Outdoor temperature
Indoor temperature
Indoor humidity
(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.
Above operation range is only valid in case direct expansion indoor
units are connected to the VRV IV system.
Special operation ranges are valid in case of using Hydrobox units or
AHU. They can be found in the installation/operation manual of the
dedicated unit. Latest information can be found in the technical
engineering data.
7
6.

Operation procedure

Operation procedure varies according to the combination of

outdoor unit and user interface.
To protect the unit, turn on the main power switch 6 hours before

operation.
If the main power supply is turned off during operation, operation

will restart automatically after the power turns back on again.
6.1. Cooling, heating, fan only, and automatic
operation
 Changeover cannot be made with a user interface whose
display shows
(refer to installation and operation manual of the user interface).
When the display

control" flashes, refer to
on page 57.
The fan may keep on running for about 1 minute after the

heating operation stops.
The air flow rate may adjust itself depending on the room

temperature or the fan may stop immediately. This is not a
malfunction.
6.1.1. For systems without cool/heat changeover remote
control switch
1 Press the operation mode selector button several times and
select the operation mode of your choice.
2 Press the ON/OFF button on the user interface.
The operation lamp lights up and the system starts operating.
6.1.2. For systems with cool/heat changeover remote control
switch
Overview of the changeover remote control switch
–5~43°C DB
21~32°C DB
14~25°C WB
≤80%
"change-over under centralized control"
"change-over under centralized
"6.4. Setting the master user interface"
Cooling operation
Heating operation
Fan only operation
1 FAN ONLY/AIR CONDITIONING
SELECTOR SWITCH
Set the switch to
1
or to for heating or cooling operation.
2 COOL/HEAT CHANGEOVER SWITCH
Set the switch to
for heating.
2
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
–20~21°C DB
–20~15.5°C WB
15~27°C DB
(a)
for fan only operation
for cooling or to
4P329765-1 – 2012.09