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Pump Low lift
Model
EWAT/EWYT016CZP-A1
EWAT/EWYT021CZP-A1
EWAT/EWYT025CZP-A1
EWAT/EWYT032CZP-A1
EWAT/EWYT040CZP-A1
EWAT/EWYT040CZP-A2
EWAT/EWYT050CZP-A2
EWAT/EWYT064CZP-A2
EWAT/EWYT090CZP-A2
Pump High lift
Model
EWAT/EWYT016CZHA1
EWAT/EWYT021CZHA1
EWAT/EWYT025CZHA1
EWAT/EWYT032CZHA1
EWAT/EWYT040CZHA1
EWAT/EWYT040CZHA2
EWAT/EWYT050CZHA2
EWAT/EWYT064CZHA2
EWAT/EWYT090CZHA2
Table 6 – Pump curve associated with each unit size
4.11. Operation limits
Operation out of the mentioned limits may damage the unit. In case of
any doubt contact the manufacturer representative. In the following
figure are illustrated the operation ranges both in cooling and heating
mode, in terms of Leaving water temperature (LWT) and Ambient
temperature (OAT).
OPERATION RANGE COOLING – EWAT-CZ
55
50
45
40
35
30
25
20
15
Ref.2
10
5
0
-5
-10
-15
-20
-25
-20
-15
-10
-5
Figure 12 – Operating limits on EWATCZ
OAT
Outside ambient temperature
ELWT
Evaporator Leaving water temperature
Ref. 1
Unit operations in this area require OP. 192 HIGH AMBIENT
TEMPERATURE KIT.
Ref. 2
Unit operations in this area require the enabling of the Brine version
in the controller and the use of the proper amount of glycol.
DEIMHP0140521_00EN
14
Pump curve
A
B
B
C
C
D
D
E
F
Pump curve
A
B
B
C
C
D
D
E
F
Ref.1
0
5
10
15
20
ELWT [°C]
OPERATION RANGE COOLING – EWYT-CZ
55
50
45
40
35
30
25
20
15
10
5
0
-5
-10
-15
-20
-25
-20
-15
Figure 13 – Operating limits on EWYTCZ in cooling mode
OPERATION RANGE HEATING – EWYT-CZ
EWYT021~090-CZ
65
60
55
50
45
40
35
30
25
20
15
-25
-20
-15
Figure 14 – Operating limits on EWYTCZ in heating mode
OAT
Outside ambient temperature
CLWT
Condenser Leaving water temperature
Ref. 1
Unit operations in this area require OP. 192 HIGH AMBIENT
TEMPERATURE KIT.
Ref. 2
Unit operations in this area require the enabling of the Brine version
in the controller and the use of the proper amount of glycol.
Ref. 3
Certain unit sizes might work in part load in this area.
EWYT016-CZ
65
60
55
50
45
40
35
30
25
30
25
20
15
-25
-20
-15
The charts shown above constitute a guideline on operating
limits in the range.
Refer to the CSS selection software for the actual
operating limits in the working conditions for each model.
Ref.1
Ref.2
-10
-5
0
5
10
ELWT [°C]
Ref.3
-10
-5
0
5
10
15
OAT [°C]
Ref.3
-10
-5
0
5
10
15
OAT [°C]
15
20
25
30
20
25
30
35
40
20
25
30
35
40
EWYT~CZ / EWAT~CZ
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