Electrical Connection; Control Box; Power Supply; Voltage Phase Imbalance (%) - Danfoss AR05 017 Series Installation, Operation And Maintenance Instructions

9.6.2 - Maximum water loop volume
Units with hydronic module incorporate an expansion tank
that limits the water loop volume. The table below gives the
maximum loop volume for pure water or ethylene glycol with
various concentrations.
AR05 039-078
Static pressure bar 1
Pure water litres 600
10% ethylene glycol l 450
20% ethylene glycol l 330
30% ethylene glycol l 270
40% ethylene glycol l 225
If the total system volume is higher than the values given
above, the installer must add another expansion tank,
suitable for the additional volume.
10  ELECTRICAL CONNECTION

10.1 - Control box

Please refer to the certifi ed dimensional drawings, supplied
with the unit.

10.2 - Power supply

The power supply must conform to the specifi cation on the
heat pump nameplate. The supply voltage must be within
the range specifi ed in the electrical data table. For connec-
tions refer to the wiring diagrams and the certifi ed dimen-
sional drawings.
WARNING: Operation of the heat pump with an improper
supply voltage or excessive phase imbalance constitutes
abuse which will invalidate the Danfoss warranty. If the
phase imbalance exceeds 2% for voltage, or 10% for current,
contact your local electricity supply at once and ensure that
the heat pump is not switched on until correc-tive measures
have been taken.

10.3 - Voltage phase imbalance (%)

100 x max. deviation from average voltage
Average voltage
Minimum and maximum connectable wire sections for AR05 units
AR05 Disconnect switch
Max. connection capacity
Section, mm²
039 1 x 95
045 1 x 95
050 1 x 95
060 1 x 95
070 1 x 95
078 1 x 95
080 1 x 95
090 1 x 95
100 1 x 95
120 1 x 95
140 1 x 185
160 1 x 185
Note: Power supply cable section (see the wiring diagrams supplied with the unit)
14
080-160
2 3 1 2
400 200 1680 1120
300 150 1260 840
220 110 930 620
180 90 750 500
150 75 630 420
Connectable wire
Minimum calculated section
Section, mm² Max. length, m
1 x 16 165
1 x 16 165
1 x 16 165
1 x 25 210
1 x 35 220
1 x 35 220
1 x 35 220
1 x 35 220
1 x 70 280
1 x 70 280
1 x 95 305
1 x 120 320
Example:
On a 400 V - 3 ph - 50 Hz supply, the individual phase
voltages were measured to be:
AB = 406 V; BC = 399 V; AC = 394 V
Average voltage = (406 + 399 + 394)/3 = 1199/3
3
560
Calculate the maximum deviation from the 400 V average:
420
(AB) = 406 - 400 = 6
310
250
(BC) = 400 - 399 = 1
210
(CA) = 400 - 394 = 6
The maximum deviation from the average is 6 V. The greatest
percentage deviation is: 100 x 6/400 = 1.5%
This is less than the permissible 2% and is therefore
acceptable.

10.4 - Recommended wire sections

Wire sizing is the responsibility of the installer, and depends on
the characteristics and regulations applicable to each
installation site. The following is only to be used as a guide-
line, and does not make Danfoss in any way liable. After wire
sizing has been completed, using the certifi ed dimen-sional
drawing, the installer must ensure easy connection and
defi ne any modifi cations necessary on site.
The connections provided as standard for the fi eld-supplied
power entry cables to the general disconnect/isolator switch
are designed for the number and type of wires, listed in the
table below.
The calculations are based on the maximum machine
cur-rent (see electrical data tables), and standard installation
practises, in accordance with IEC 60364, table 52C have been
applied AR05 units are installed outside):
• No. 17: suspended aerial lines,
• No. 61: buried conduit with a derating coeffi cient of 20.
The calculation is based on PVC or XLPE insulated cables with
copper core. A maximum ambient temperature of 46°C has
been taken into consideration. The given wire length limits
the voltage drop to < 5% (length L in metres - see table
below).
Maximum calculated section
Wire type Section, mm²
XLPE Cu 1 x 25
XLPE Cu 1 x 25
XLPE Cu 1 x 25
XLPE Cu 1 x 35
XLPE Cu 1 x 50
XLPE Cu 1 x 70
XLPE Cu 1 x 70
XLPE Cu 1 x 70
XLPE Cu 1 x 95
XLPE Cu 1 x 95
XLPE Cu 1 x 185
XLPE Cu 1 x 185
Installation, operation and maintenance instructions - VMGFE102
= 399.7 say 400 V
Motor
Max. length, m
300
300
300
305
350
380
380
380
410
410
465
465
Wire type
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu