14
Installation, operation and maintenance instructions - VMGFE102
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
= 399.7 say 400 V
Calculate the maximum deviation from the 400 V average:
(AB) = 406 - 400 = 6
(BC) = 400 - 399 = 1
(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).
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
080-160
Static pressure
bar
1
2
3
1
2
3
Pure water
litres
600
400
200
1680
1120
560
10% ethylene glycol
l
450
300
150
1260
840
420
20% ethylene glycol
l
330
220
110
930
620
310
30% ethylene glycol
l
270
180
90
750
500
250
40% ethylene glycol
l
225
150
75
630
420
210
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
Motor
Minimum and maximum connectable wire sections for AR05 units
AR05
Disconnect switch
Connectable wire
Max. connection capacity
Minimum calculated section
Maximum calculated section
Section, mm²
Section, mm²
Max. length, m
Wire type
Section, mm²
Max. length, m
Wire type
039
1 x 95
1 x 16
165
XLPE Cu
1 x 25
300
PVC Cu
045
1 x 95
1 x 16
165
XLPE Cu
1 x 25
300
PVC Cu
050
1 x 95
1 x 16
165
XLPE Cu
1 x 25
300
PVC Cu
060
1 x 95
1 x 25
210
XLPE Cu
1 x 35
305
PVC Cu
070
1 x 95
1 x 35
220
XLPE Cu
1 x 50
350
PVC Cu
078
1 x 95
1 x 35
220
XLPE Cu
1 x 70
380
PVC Cu
080
1 x 95
1 x 35
220
XLPE Cu
1 x 70
380
PVC Cu
090
1 x 95
1 x 35
220
XLPE Cu
1 x 70
380
PVC Cu
100
1 x 95
1 x 70
280
XLPE Cu
1 x 95
410
PVC Cu
120
1 x 95
1 x 70
280
XLPE Cu
1 x 95
410
PVC Cu
140
1 x 185
1 x 95
305
XLPE Cu
1 x 185
465
PVC Cu
160
1 x 185
1 x 120
320
XLPE Cu
1 x 185
465
PVC Cu
Note:
Power supply cable section (see the wiring diagrams supplied with the unit)
