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Refer to Fig. 4-1.
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bors.
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indoor unit.
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late.
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fall is anticipated, special precautions such as raising the installation location or
installing a hood on the air intake must be taken to prevent the snow from block-
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malfunction may result.
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Constraints on indoor unit installation
You should note that indoor units that can be connected to this outdoor unit are the
following models.
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When using Branch box, Indoor units with model numbers 15-100 can be connected.
Refer to the table 1 below for possible room, indoor unit combinations.
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The rated capacity should be determined by observing the table below. The unit’s
quantities are limited as shown in the following table 2. For the next step, make
sure that the total rated capacity selected will stay in a range of 50% – 130% of the
outdoor unit capacity.
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Table 1-1 (P*FY series (For Building Application indoor unit))
Indoor unit type
P15 P20 P25 P32 P40 P50 P63 P71
3
P100 P125 P140
Rated capacity
(Cooling) (kW)
1.7
2.2
3.6
4.5
5.6
7.1
9.0
11.2 14.0 16.0
Table 1-2 (M*Z series)
Indoor unit type
15
20
22
25
35
42
50
60
71
Rated capacity
(Cooling) (kW)
1.5
2.0
2.2
2.5
3.5
4.2
5.0
6.0
7.1
Combinations in which the total capacity of indoor units exceeds the capacity of the
outdoor unit will reduce the cooling capacity of each indoor unit below their rated
cooling capacity. Thus, combine indoor units with an outdoor unit within the outdoor
unit’s capacity, if possible.
* When all the indoor units are 1.7 kW models, 12 indoor units can be connected to
1 outdoor unit.
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When using a PWFY unit as an indoor unit, be aware of the following points
because the PWFY unit is different from other indoor units.
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outdoor unit so that the total rated capacity of the indoor units, excluding the PWFY
unit, is 50–100% of the outdoor unit capacity.
Limits for the total rated capacity of the indoor units when connecting a PWFY unit
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in cooling mode. However, the indoor units other than the PWFY unit can operate
in cooling mode.
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mode, the other indoor units will stop.
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water temperature.
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If the test run is carried out using the outdoor unit switches, the PWFY unit will
not operate. Carry out the test run using the PWFY unit switches or the remote
controller.
For information about carrying out the test run, refer to the data book or the service
manual for the PWFY unit.
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Step
1
in the pump down procedure instructs the user to “operate all indoor units
in cooling mode”. However, the PWFY unit will not operate in cooling mode.
Operate all of the indoor units, excluding the PWFY unit, in cooling mode.
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Table 3
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Model
3:)<390($8
Temp. range of
Heating
Outdoor temp.
–15 to 21°C (DB), –15 to 15°C (WB)
Inlet Water temp.
10 to 45°C
Temp. range of
Cooling
Outdoor temp.
–
Inlet Water temp.
–
SW1
1
2
3
4
5
6
7
9 10
21
SW4
1
2
3
4
5
6
7
9 10
21
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(mm)
370
1050
225
600
Table 2
Connectable indoor units quantities
380<3
1-10
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1-12
380<3
1-12*
Connectable indoor units quantities via Branch Box
380<3
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