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5.14 - Protection against cavitation (option 116)
To ensure the durability of the pumps in the integrated
hydronic modules, the control algorithm of the 61WG/30WG/
30WGA units incorporates anti-cavitation protection.
It is therefore necessary to ensure a minimum pump entering
pressure of 60 kPa (0.6 bar) during operation and at shut-down.
A pressure below 60 kPa will prohibit unit start-up or cause
an alarm with the unit shutting down.
5.15 - Plate heat exchanger pressure drop (includes internal piping)
Evaporator - standard unit without hydronic module - Water only
61WG/30WG/30WGA 020-045
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
Water flow rate, l/s
1
61WG/30WG/30WGA 020
2
61WG/30WG/30WGA 025 to 61WG/30WG/30WGA 030
3
61WG/30WG/30WGA 035
4
61WG/30WG/30WGA 040
5
61WG/30WG/30WGA 045
Condenser - standard unit without hydronic module - Water only
61WG/30WG 020-045
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
Water flow rate, l/s
1
61WG/30WG 020
2
61WG/30WG 025 to 61WG/30WG 030
3
61WG/30WG 035
4
61WG/30WG 040
5
61WG/30WG 045
28
In order to obtain sufficient pressure, it is recommended:
•
to pressurise the hydronic circuit between 100 kPa and
300 kPa (1 and 3 bar) maximum on the suction side of
the pump,
•
to clean the hydronic circuit before charging water,
•
to regularly clean the screen filter.
61WG/30WG/30WGA 050-090
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
-10
0
1
2
3
4
5
6
61WG/30WG/30WGA 050
7
61WG/30WG/30WGA 060
8
61WG/30WG/30WGA 070
9
61WG/30WG/30WGA 080
10 61WG/30WG/30WGA 090
61WG/30WG 050-090
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
6
61WG/30WG 050
7
61WG/30WG 060
8
61WG/30WG 070
9
61WG/30WG 080
10 61WG/30WG 090
6
7
8
9
10 11 12 13 14 15 16
Water flow rate, l/s
5
6
7
8
9
10
11
Water flow rate, l/s
12
13
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