16
Evaporator leaving water temperature, °C
Condenser
lea
ving
w
ater
temper
atur
e,
°C
6 - APPLICATION DATA
6.1 - Operating limits
30XW-V/30XWH
V
Minimum
Maximum
Evaporator
Entering temperature at start-up
-
35.0°C
Leaving temperature during operation
3.3°C
20.0°C
Entering/leaving temperature difference at full load
2.8 K
11.1 K
Condenser
Entering temperature at start-up
13.0°C*
-
Leaving temperature during operation
19.0°C*
50.0°C
Entering/leaving temperature difference at full load
2.8 K
11.1 K
* For lower condenser temperatures a water flow control valve must be used at
the condenser (two or three-way valve). Please refer to option 152 to ensure
the correct condensing temperature.
Note:
Ambient temperatures:
These units are dedicated for indoor environment. The
external temperature at chiller start up should be at least 5°C. For such low ambient,
option 152 is recommended.
During storage and transport of the 30XW-V/30XWHV
units (including by container) the minimum and maximum permissible temperatures
are -20°C and 72°C (and 65°C for option 200).
5.6 - Field control wiring
IMPORTANT: Field connection of interface circuits may
lead to safety risks: any control box modification must
maintain equipment conformity with local regulations.
Precautions must be taken to prevent accidental electrical
contact between circuits supplied by different sources:
•
The routing selection and/or conductor insulation
characteristics must ensure dual electric insulation.
•
In case of accidental disconnection, conductor fixing
between different conductors and/or in the control
box prevents any contact between the conductor ends
and an active energised part.
Refer to the Touch Pilot control manual and the certified
wiring diagram supplied with the unit for the field control
wiring of the following features.
Available as standard:
•
Remote on/off switch
•
Demand limit external switch
•
Remote dual set point
•
Alarm and operation report
•
Evaporator pump control signal
•
Condenser pump control signal.
This does not control
condenser pump operation (for this function add option
156 and flow switch).
•
Heating/cooling change-over
Available as an option:
•
Water valve control
•
Various interlocks and reports on the Energy Manage-
ment Module board (option 156)
•
Refrigerant leak detection
CCN bus connection
•
The permanent connection to the system CCN bus is
made at the terminal provided for this purpose inside
the control box.
•
The connection of the CCN service tool is possible at a
socket under the control box, accessible from outside.
5.7 - 24 and 230 V power reserve for the user
Control circuit reserve:
After all required options have been connected, the TC
transformer includes a power reserve of 1 A at 24 V a.c.
that can be used for the field control wiring.
A second TCA transformer supplies the 230 V, 50 Hz circuit
to charge a battery for a portable computer at 0.63 A
maximum at 230 V. The connection is via an EEC 7/16 type
socket (2 poles without earth) located on the inside front
of the control box and accessible from outside.
Only devices with class II double insulation can be connected
at this socket.
From approx. 50% to full load
Part load limit approx. 50%
Minimum load limit
For more precise details please refer to the unit selection program.
15
20
25
30
35
40
45
50
55
0
5
10
15
20
6.2 - Condenser-side installation recommendation
To ensure unit start-up at low condenser water temperature
conditions, a specific installation may be necessary. Please
refer to the table below:
0 < t < 20 min 20 < t < 40 min 40 < t < 60 min
t > 60 min
15°C < x
13 < x < 15°C
11 < x < 13°C
8 < x < 11°C
x < 8°C
x Condenser water temperature before start-up
t
Time required to reach a temperature of 19°C at the condenser outlet
1
The unit can start without the use of a two- or three-
way valve, but operation will be more reliable with the
control valve.
2
The use of a two- or three-way valve is strongly
recommended.
3
The use of a two- or three-way valve is compulsory.
4
The use of a two- or three-way valve is compulsory
and the use of variable-speed pumps is strongly
recommended.
