7 Configuration
Installer and user reference guide
39
RWEYQ8~1 RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1 – 2017.04
[2‑20]
Description
1
Activated.
To stop the manual additional refrigerant
charge operation (when the required additional
refrigerant amount is charged), push BS3. If
this function was not aborted by pushing BS3,
the unit will stop its operation after 30 minutes.
If 30 minutes was not sufficient to add the
needed refrigerant amount, the function can be
reactivated by changing the field setting again.
[2‑21]
Refrigerant recovery/vacuuming mode.
In order to achieve a free pathway to reclaim refrigerant out of the
system or to remove residual substances or to vacuum the system it
is necessary to apply a setting which will open required valves in the
refrigerant circuit so the reclaim of refrigerant or vacuuming process
can be done properly.
[2‑21]
Description
0 (default)
Deactivated.
1
Activated.
To stop the refrigerant recovery/vacuuming
mode, push BS3. If BS3 is not pushed, the
system will remain in refrigerant recovery/
vacuuming mode.
[2‑23]
Variable refrigerant temperature (VRT) control
[2‑23]
VRT control
0 (default)
Activated both cooling and heating
1
Activated heating only
2
Activated cooling only
3
Deactivated
[2‑24]
Water pump/valve control.
To activate the variable flow system, change the setting to the
applicable value.
[2‑24]
Water pump control
0 (default)
OFF
1
Each unit has a pump/valve
2
One pump/valve per system
3
Each unit has a pump/valve (pump is OFF
when slave unit does not operate)
[2‑30]
Power consumption limitation level (step 1) via the external control
adaptor (DTA104A61/62).
If the system needs to be running under power consumption
limitation conditions when an external signal is sent to the unit, this
setting defines the level power consumption limitation that will be
applied for step 1. The level is according to the table.
[2‑30]
Power consumption limitation
(approximately)
1
60%
2
65%
3 (default)
70%
4
75%
5
80%
6
85%
7
90%
[2‑30]
Power consumption limitation
(approximately)
8
95%
[2‑31]
Power consumption limitation level (step 2) via the external control
adaptor (DTA104A61/62).
If the system needs to be running under power consumption
limitation conditions when an external signal is sent to the unit, this
setting defines the level power consumption limitation that will be
applied for step 2. The level is according to the table.
[2‑31]
Power consumption limitation
(approximately)
1 (default)
40%
2
50%
3
55%
[2‑32]
Forced, all time, power consumption limitation operation (no external
control adaptor is required to perform power consumption limitation).
If the system always needs to be running under power consumption
limitation conditions, this setting activates and defines the level
power consumption limitation that will be applied continuously. The
level is according to the table.
[2‑32]
Restriction reference
0 (default)
Function not active.
1
Follows [2‑30] setting.
2
Follows [2‑31] setting.
[2‑50]
Brine type setting.
By changing this setting, you can extend the operation range at the
brine side of the unit.
▪ Normal operation range at brine side (default): for use with water
as heat source medium.
▪ Extended operation range at brine side (default): for use with brine
as heat source medium.
NOTICE
By changing this setting to extended operation type, glycol
(40%) must be used as heat source medium to avoid
freeze up of the brine circuit or unit itself (cf. operation
range). Do not use water in this case!
[2‑50]
Description
0 (default)
No brine: water. Extended range impossible.
3
Use brine: glycol (40%). Extended range
possible.
[2‑73]
Zero energy dissipation control setting.
[2‑73]
Description
0 (default)
OFF
1
ON (with priority on cooling capacity)
2
ON (with priority on zero energy dissipation)
Zero energy dissipation control can be OFF if the mechanical room
is already equipped with a ventilation system or air conditioning
system for other facilities.
[2‑74]
Zero energy dissipation setting temperature.
