7 Configuration
Installer and user reference guide
42
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1A – 2018.01
[9‑00] Leaving water temperature compensation value for
heating operation
[9‑01] Leaving water thermistor auto corrective function
This function will take into account the outdoor ambient conditions
and correct the measured value which will be used for the logic.
E.g. when the ambient temperature is high during cooling mode, the
logic will correct the measured value of the leaving water thermistor
to a lower value to take into account influence of high ambient
temperatures in the measurement.
[9-02]
This setting is not applicable.
[9‑03] Leaving water temperature compensation value for
cooling operation
[9-04]
This setting is not applicable.
[A] Option setup
[A-00]
This setting is not applicable.
[A-01]
This setting is not applicable.
[A‑02] Return water temperature undershoot value
This setting makes it possible to set the allowable undershoot when
operating the unit during heating THERMO ON/OFF condition.
The unit will go in THERMO ON only if the return water temperature
(RWT) goes below the setpoint minus the differential temperature:
Thermo ON: RWT<Setpoint–(([A‑02]/2)+1)
The setting [A‑02] has a variability range from 0 to 15 and the step is
1 degree. The default value is 5, meaning that the differential
temperature default value is 3.5.
[A‑03] Leaving water temperature overshoot/undershoot value
This setting makes it possible to set the allowable overshoot
(heating)/undershoot (cooling) when operating the unit during
leaving water control.
[b] Settings are not applicable
[C] Leaving water temperature limits
This setting is used to limit the selectable leaving water temperature
on the user interface.
[C‑00] Maximum leaving water setpoint in heating operation
[C‑01] Minimum leaving water setpoint in heating operation
[C‑02] Maximum leaving water setpoint in cooling operation
[C‑03] Minimum leaving water setpoint in cooling operation
This depends on field setting [A‑04].
[C-04]
This setting is not applicable.
[d] Settings are not applicable
[E] Service mode
[E‑00]
This setting is not applicable.
[E‑01]
This setting is not applicable.
[E‑02]
This setting is not applicable.
[E‑03]
This setting is not applicable.
[E‑04] Pump only operation (air purge function)
When installing and commissioning the unit it is very important to
remove all air from the water circuit.
This field setting operates the pump to improve air removal from the
unit without actually operating the unit. The pump will run for
10 minutes, stop 2 minutes, etc.
[E‑04]
Description
0 (default)
Normal operation of the unit
1
Automatic air purge operation during
108 minutes
2
Automatic air purge operation during
48 minutes
[F] Option setup
[F‑00] Return water temperature overshoot value
This setting makes it possible to set the allowable overshoot when
operating the unit during cooling THERMO ON/OFF condition.
The unit will go in THERMO ON only if the return water temperature
(RWT) goes above the setpoint plus the differential temperature:
Thermo ON: RWT<S(([F‑00]/2)+1)
The setting [F‑00] has a variability range from 0 to 15 and the step is
1 degree. The default value is 5, meaning that the differential
temperature default value is 3.5.
7.3
Using the leak detection function
7.3.1
About automatic leak detection
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.
7.3.2
To manually perform a leak detection
Executing the leak detection function one time at site can also be
done by following procedure.
1
Push BS2 one time.
2
Push BS2 one more time.
3
Push BS2 5 seconds.
Information codes:
Result of leak detection operation is informed in [1‑35] and [1‑29].
Steps during leak detection:
Display
Steps
Preparation
(a)
Pressure equalisation
Start up
Leak detection operation
Standby
(b)
Leak detection operation is finished
(a)
If the indoor temperature is too low, first the heating
operation will start.
