27
English
13.2.2. Operating the DIP switches
By operating the DIP switches it is possible to:
What to do with DIP switch DS1
1
Cool/Heat selector (refer to the manual of the Cool/
Heat selector switch)
OFF=not installed=factory setting
2-4
NOT USED
DO NOT CHANGE THE FACTORY SETTING
What to do with DIP switch DS2
1-4
NOT USED
DO NOT CHANGE THE FACTORY SETTING
13.3.
Connecting the PC configurator to the outdoor unit
Connection of the optional PC configurator cable to the outdoor unit
has to be done on A1P. Connect the 999482P3 cable to the 5-pin blue
connector X27A.
CAUTION
Works executed on the outdoor unit are best done under dry weather
conditions to avoid water ingress.
X27A
1
2
3
2
3
4
5
H
J
S
T
X27A
A1P
1 PC
2 Cable (999482P3)
3 Main printed circuit
board
14. Charging refrigerant
14.1.
Precautions
NOTE
•
Refrigerant cannot be charged until field wiring has been completed.
• Refrigerant may only be charged after performing the leak test and
the vacuum drying.
• When charging a system, care shall be taken that its maximum
permissible charge is never exceeded, in view of the danger of
liquid hammer.
• Charging a system with an unsuitable substance as refrigerant may
cause explosions and accidents, so always ensure that the appro-
priate refrigerant R410A is charged.
• Refrigerant containers shall be opened slowly.
• Always use protective gloves and protect your eyes when charging
refrigerant.
• When the refrigerant system is to be opened, refrigerant must be
treated according to the applicable legislation.
DANGER
See Safety considerations on page i.
• To avoid compressor breakdown, do not charge the refrigerant
more than the specified amount.
• This outdoor unit is factory charged with refrigerant and depending
on pipe sizes and pipe lengths systems require additional charg-
ing of refrigerant. See 14.2. Calculating the additional refrigerant
charge.
• In case recharge is required, refer to the nameplate of the unit.
It states the type of refrigerant and necessary amount.
14.2.
Calculating the additional refrigerant charge
NOTE
The refrigerant charge of the system must be less than 210 lbs.
(100 kg). This means that in case the calculated total refrigerant
charge is equal to or more than 209 lbs. (95 kg) you must divide your
multiple outdoor system into smaller independent systems, each
containing less than 209 lbs. (95 kg) refrigerant charge. For factory
charge, refer to the unit nameplate.
14.2.1.
How to calculate the additional refrigerant to be charged
Additional refrigerant to be charged=R (lbs.). R should be rounded off
in units of 0.1 lbs.
R=[(X
1
×
f
7/8)
×
0.249+(X
2
×
f
3/4)
×
0.175+(X
3
×
f
5/8)
×
0.121+(X
4
×
f
1/2)
×
0.081+(X
5
×
f
3/8)
×
0.040+(X
6
×
f
1/4)
×
0.015]
×
1.04+[A]+[B]+[C]
X
1...6
=Total length (ft. (m)) of liquid piping size at
f
a
* In units of 0.1 kg, additional refrigerant to be charged=R (kg).
R=[(X
1
×
f
22.2)
×
0.37+(X
2
×
f
19.1)
×
0.26+(X
3
×
f
15.9)
×
0.18+(X
4
×
f
12.7)
×
0.12+(X
5
×
f
9.5)
×
0.059+(X
6
×
f
6.4)
×
0.022] × 1.04+[A]+[B]+[C]
Parameter [A]
Refrigerant amount for Branch Selector units
Branch Selector unit model
Refrigerant amount
BS4Q54T
*
0.7 lbs./unit (0.3 kg/unit)
BS6Q54T
*
0.9 lbs./unit (0.4 kg/unit)
BS8Q54T
*
1.1 lbs./unit (0.5 kg/unit)
BS10Q54T
*
1.5 lbs./unit (0.7 kg/unit)
BS12Q54T
*
1.8 lbs./unit (0.8 kg/unit)
BSF4Q54T
*
1.4 lbs./unit (0.65 kg/unit)
BSF6Q54T
*
1.9 lbs./unit (0.85 kg/unit)
BSF8Q54T
*
2.2 lbs./unit (1.0 kg/unit)
BSQ36T
*
0.1 lbs./unit (0.05 kg/unit)
BSQ60T
*
0.2 lbs./unit (0.1 kg/unit)
BSQ96T
*
0.4 lbs./unit (0.2 kg/unit)
Parameter [B]
Outdoor unit
Refrigerant amount
RELQ72T
*
9.7 lbs./unit (4.4 kg/unit)
RELQ96T
*
9.7 lbs./unit (4.4 kg/unit)
RELQ120T
*
9.7 lbs./unit (4.4 kg/unit)
Field
piping
length
Parameter [C]
Total
indoor unit
capacity
connection
ratio
Refrigerant amount
Total outdoor unit capacity type
RELQ72-144T type RELQ192-240T type
< 295.3 ft.
(90 m)
≤
85%
0.0
> 85%
The smaller of [D]
or 5.51 lbs. (2.5 kg)
The smaller of [D]
or 6.61 lbs. (3.0 kg)
≥ 295.3 ft.
(90 m)
≤
85%
0.0
> 85%
2.20 lbs. (1.0 kg)
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