![background image](http://html1.mh-extra.com/html/daikin/remq5t7y1b/remq5t7y1b_installation-and-operation-manual_2459801026.webp)
7 Commissioning
Installation and operation manual
26
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353996-1E – 2018.04
[2‑35]
Description
0
In case the outdoor unit is installed in the
lowest position (indoor units are installed on a
higher position than outdoor units) and the
height difference between the highest indoor
unit and the outdoor unit exceeds 40 m, the
setting [2‑35] should be changed to 0.
1 (default)
—
[2‑45]
Technical cooling.
[2‑45]
Description
0 (default)
No technical cooling available
1
Technical cooling available
For more information about this setting, refer to the service manual.
[2‑47]
T
e
target temperature during heat recovery operation.
[2‑47]
T
e
target (°C)
0 (default)
Auto
2
6
3
7
4
8
5
9
6
10
7
11
[2‑49]
Height difference setting.
[2‑49]
Description
0 (default)
—
1
In case the outdoor unit is installed in the
highest position (indoor units are installed on a
lower position than outdoor units) and the
height difference between the lowest indoor
unit and the outdoor unit exceeds 50 m, the
setting [2‑49] has to be changed to 1.
6.1.9
To connect the PC configurator to the
outdoor unit
X27A
a
b
c
2
3
4
5
H J
ST
X27A
A1P
a
PC
b
Cable (EKPCCAB)
c
Outdoor unit main PCB
6.2
Using the leak detection function
6.2.1
About automatic leak detection
The (automatic) leak detection function is not by default activated
and can only start working when the additional refrigerant charge is
inputted into the system's logic (see [2‑14]).
The leak detection operation can be automated. By changing
parameter [2‑85] to chosen value, the interval time or the time till the
next automatic leak detection operation can be chosen. The
parameter [2‑86] defines whether the leak detection operation is
executed one time (within [2‑85] days) or intermittent, respecting an
interval of [2‑85] days.
Availability of the leak detection function feature requires input of the
additional refrigerant charge amount immediately after finishing the
charging. The input must be executed before performing the test
operation.
INFORMATION
▪ The weighed and already recorded amount of
additional refrigerant charge (not the total amount of
refrigerant present in the system) must be entered.
▪ The leak detection function is not available when
Hydrobox units are connected to the system.
▪ When the height difference between indoor units is
≥50/40 m, the leak detection function can not be used.
7
Commissioning
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run MUST be
performed according to the procedures described below.
7.1
Precautions when commissioning
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
During test operation, the outdoor unit and the indoor units will start
up. Make sure that the preparations of all indoor units are finished
(field piping, electrical wiring, air purge, ...). See installation manual
of the indoor units for details.
7.2
Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit MUST be closed, ONLY then
can the unit be powered up.
You read the complete installation and operation
instructions, as described in the
installer and user
reference guide
.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Summary of Contents for REMQ5T7Y1B
Page 42: ......
Page 43: ......
Page 44: ...4P353996 1E 2018 04 Copyright 2014 Daikin 4P353996 1 D 00000008...