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3. System
From the previous page.
Parts name
Water circulation pump
(1) Packaged-type units
Heating
PUHZ-W50
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
PUHZ-HW112/140
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
14.0
(2) Split-type units
Heating
PUHZ-RP35/50 *
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
5.0
PUHZ-RP100/125/140 *
PUHZ-SW100/120 *
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
12.0
*1 When the connected plate heat exchanger is ACH 30-30 made by ALFA LAVAL.
*2 When the connected plate heat exchanger is ACH 70-30 made by ALFA LAVAL.
*3 When the connected plate heat exchanger is ACH 70-40 made by ALFA LAVAL.
*4 When two ACH 70-40 plate heat exchangers made by ALFA LAVAL are parallel-connected.
3-way valve
Connect a 3-way valve via relay.
Current: 0.5A Max , 10mA Min
Power supply: 230V AC
Connect the surge absorber according to the load at site.
Flow switch
It is required to protect system from the effects of insufficient flow.
Strainer /Magnetic filter
Provide it as required to protect parts from damages caused by iron particles/water/contamination (e.g. the position before pump and return part
(water circuit)
from emitters).
Pressure relief valve
It is required to protect system from reaching high pressure.
(Primary circuit side)
Select the operating pressure depending on water pressure in the circuit in normal use.
(Sanitary water side)
* Follow the national regulations.
Expansion Vessel (Primary circuit side)
Expansion Vessel (Sanitary water side)
Limits of TOTAL electric current when con-
necting field supply parts
6.0
7.0
8.0
9.0
10.0
11.0
Water flow rate [L/min]
19.0
24.0
29.0
Water flow rate [L/min]
1
PUHZ-SW40/50
11.0
7.0
9.0
13.0
Water flow rate [L/min]
3
PUHZ-HRP100/125 *
3
PUHZ-SHW112/140 *
Available range
16.0
20.0
24.0
28.0
32.0
Water flow rate [L/min]
When the water circuit is closed, select the expansion vessel according to water quantity of the water circuit.
* Follow the national regulations.
(Power supply from outdoor unit)
TOTAL current requirement MUST be
Requirement
PUHZ-W85
19.0
Available range
17.0
15.0
13.0
11.0
9.0
7.0
5.0
12.0
13.0
14.0
10.0
Available range
34.0
39.0
PUHZ-RP60/71 *
PUHZ-SW75 *
19.0
Available range
17.0
15.0
13.0
11.0
9.0
7.0
5.0
8.0
15.0
17.0
19.0
PUHZ-RP200/250 *
3
3
PUHZ-SW175/190 *
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
36.0
40.0
44.0
48.0
25.0
3A (otherwise, the fuse on the outdoor unit PCB will blow).
Available range
12.0
14.0
16.0
18.0
20.0
Water flow rate [L/min]
2
PUHZ-HRP71 *
3
2
PUHZ-SHW80 *
2
Available range
14.0
10.0
12.0
16.0
18.0
Water flow rate [L/min]
4
PUHZ-HRP200 *
4
4
PUHZ-SHW230 *
4
Available range
35.0
45.0
55.0
65.0
Water flow rate [L/min]
22.0
24.0
20.0
22.0
24.0
75.0
85.0
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