6
Technical Information
3
EN
Unit Compatibility
Hydrobox
Outdoor unit
EHSD-
MEC
EHSD-
MC
EHSD-
VM2C
EHSD-
YM9C
EHSC-
MEC
EHSC-
VM2C
EHSC-
VM2EC
EHSC-
VM6C
EHSC-
VM6EC
EHSC-
YM9C
EHSC-
YM9EC
EHSC-
TM9C
ERSD-
VM2C
ERSC-
MEC
ERSC-
VM2C
EHPX-
VM2C
EHPX-
VM6C
EHPX-
YM9C
Packaged-
type
PUHZ-W50, 85, 112
PUHZ-HW112, 140
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Split-type SUHZ-SW45
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PUHZ-SW40, 50, 75
(See below.)
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PUHZ-FRP71
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PUHZ-SW75, 100, 120
PUHZ-SHW80, 112, 140
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PUMY-P112, 125, 140*KM*2
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<Table 3.4>
<Figure 3.4>
<Figure 3.5>
Note
• Be sure to follow your local regulations to per-
form system configuration of the DHW connec-
tions.
• DHW connections are not included in the hy-
drobox package. All required parts are to be
sourced locally.
• To enable draining of the hydrobox an isolating
valve should be positioned on both the inlet and
outlet pipework.
• Be sure to install a strainer on the inlet pipe
work to the hydrobox.
• Suitable drain pipework should be attached to
all relief valves in accordance with your coun-
try's regulations.
• A backflow prevention device must be installed
on water supply pipework (IEC 61770).
• When using components made from different
metals or connecting pipes made of different
metals insulate the joints to prevent a corrosive
reaction taking place which will damage the
pipework.
Pa
18
22
25
23
24
*1
26
7
6
5
8
9
10
11
12
13
15
16
20
21
27
3
19
26
28
28
4
25
26
26
Water circuit diagram
Pa
18
19
22
25
23
24
5
3
17
9
10
11
12
13
15
16
20
27
4
6
7
8
*1
25
26
26
21
<EHS*> (Split model system)
<ERS*> (Split model system for heating and cooling)
<EHPX> (Packaged model system)
Local
system
Refrigerant pipe
Water
supply
Water
supply
DHW
DHW
Drain
Drain
Drain
Drain
Cold
water
Cold
water
Water pipe
Water pipe
Hydrobox
Hydrobox
Flare connections
Local
system
No.
Part name
EHS*-
MEC
EHS*-
*M*C
EHSC-
*M*EC
ERS*-
VM2C
ERSC-
MEC
EHPX-
*M*C
1
Control and electrical box
2
Main remote controller
3
Plate heat exchanger
(Refrigerant - Water)
-
4
Water circulation pump 1
5
Pump valve
6
Drain cock (Primary circuit)
7
Booster heater 1, 2
-
-
8
Flow sensor
9
Manometer
10
Pressure relief valve (3 bar)
11
Automatic air vent
12
Expansion vessel
-
-
-
13
Strainer valve
14
Drain pan
-
-
-
-
15
THW1
16
THW2
17
TH2
-
18
THW5
(Optional part PAC-TH011TK-E
or PAC-TH011TKL-E)
-
-
-
-
-
-
19
Outdoor unit
-
-
-
-
-
-
20
Drain pipe (Local supply)
-
-
-
-
-
-
21
3-way valve (Local supply)
-
-
-
-
-
-
22
DHW indirect unvented tank
(Local supply)
-
-
-
-
-
-
23
Cold water inlet pipe (Local supply)
-
-
-
-
-
-
24
DHW outlet pipe (Local supply)
-
-
-
-
-
-
25
Back flow prevention device
(Local supply)
-
-
-
-
-
-
26
Isolating valve (Local supply)
-
-
-
-
-
-
27
Magnetic filter (Local supply)
(Recommended)
-
-
-
-
-
-
28
Strainer (Local supply)
-
-
-
-
-
-
<Table 3.5>
*1 Refer to the following section [Local system].
● When connecting E*SD-* to PUHZ-SW75, the following refrigerant joint pipes are necessary.
PAC-SH50RJ-E (ø15.88 → ø12.7 for gas refrigerant pipe)
PAC-SH30RJ-E (ø9.52 → ø6.35 for liquid refrigerant pipe)