Application Data; Operating Range, Standard Units - Cooling Mode; Operating Range, Standard Units - Heating Mode; Water Heat Exchanger Water Fl Ow Rate - Danfoss AR05 017 Series Installation, Operation And Maintenance Instructions

9  APPLICATION DATA

9.1 - Operating range, standard units - cooling mode

Evaporator
Entering water temperature at start-up
Leaving water temperature during operation
Entering/leaving water temperature diff erence
Condenser
Entering air temperature AR05***
Note: Do not exceed the maximum operating temperature.
* For entering water temperatures below 7.5°C at start-up, contact Danfoss.
** For low-temperature applications, where the leaving water temperature is below
5°C, a frost protection solution must be used. For low evaporator leaving water
temperatures (< 5°C) please refer to option 6.
*** Maximum outside temperature: Please refer to option 42 for low-temperature
applications (< -10°C). For transport and storage of the AR05 units the minimum
and maximum allowable temperatures are -20°C and +48°C. It is recommended that
these temperatures are used for transport by container.
AR05 - cooling mode
50
40
30
20
10
0
-10
-20
0 5 10
Evaporator leaving water temperature, °C

9.2 - Operating range, standard units - heating mode

Condenser
Entering water temperature at start-up
Leaving water temperature during operation
Entering/leaving water temperature diff erence
Evaporator
Air temperature
Note: Do not exceed the maximum operating temperature.
NOTE: This operating range applies up top 130 Pa static
pressure without suction air duct for sizes 060, 070 and 078
and 140-160, and up to 240 Pa for all other sizes.
AR05 - heating mode
60
55
50
45
40
35
30
25
20
-10 0 10
-20
Entering air temperature, °C
Installation, operation and maintenance instructions - VMGFE102
Minimum Maximum
°C 7.5* 30
°C 5** 20
K 3 10
Minimum Maximum
°C -10 48
30RQS
30RQSY
Full load
Part load
15 20 25
Minimum Maximum
°C 8 45
°C 25 55
K 3 10
Minimum Maximum
°C -15 40
Full load
Part load
20 30 40 50
9.3 - Water heat exchanger water fl ow rate
AR05 Flow rate, l/s
Minimum Maximum*
039 0.9 3.0
045 0.9 3.4
050 0.9 4.2
060 0.9 5.0
070 1.0 5.0
078 1.2 5.5
080 1.2 6.8
090 1.3 6.8
100 1.5 7.7
120 1.7 8.5
140 2.0 10.6
160 2.3 11.2
* Maximum fl ow rate at a pressure drop of 100 kPa in the plate heat exchanger (unit
without hydronic module).
** Maximum fl ow rate at an available pressure of 20 kPa (unit with low-pressure
hydronic module) or 50 kPa (high-pressure module).
*** Maximum fl ow rate with single pump is 2 to 4% higher, depending on the size
9.4 - Minimum water fl ow rate
If the installation fl ow rate is below the minimum fl ow rate,
there is a risk of excessive fouling.
9.5 - Maximum water heat exchanger water fl ow rate
This is limited by the permitted water heat exchanger
pressure drop. Also, a minimum water heat exchanger ∆T of 2.8
K must be guaranteed, which corresponds to a water fl ow rate
of 0.09 l/s per kW.

9.6 - Water loop volume

9.6.1 - Minimum water loop volume
The minimum water loop volume, in litres, is given by the
following formula:
Volume (l) = CAP (kW) x N, where CAP is the nominal cooling
capacity at nominal operating conditions.
Application
Air conditioning
AR05 039 to 160
Industrial process cooling
AR05 039 to 160
NOTE: For industrial process cooling applications, where high
stability of the water temperature levels must be achieved,
the values above must be increased.
This volume is required to obtain temperature stability and
precision. To achieve this volume, it may be necessary to add a
storage tank to the circuit. This tank should be equipped with
baffl es to allow mixing of the fl uid (water or brine). Please
refer to the examples below.
Bad
Bad
Maximum dual pump**
Low pressure*** High pressure***
2.9 3.4
3.2 3.8
3.7 4.4
4.1 5.0
4.1 5.0
4.4 5.2
5.1 6.2
5.1 6.2
6.3 6.5
6.5 8.0
7.9 8.7
8.2 8.9
N
2.5
(See note)
Good
Good
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