![background image](http://html1.mh-extra.com/html/carrier/30wg-020/30wg-020_installation-operation-and-maintenance-instructions_2560463028.webp)
28
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
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
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
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
0
1
2
3
4
5
6
7
8
9
10 11 12 13
5.15 - Plate heat exchanger pressure drop (includes internal piping)
Evaporator - standard unit without hydronic module - Water only
61WG/30WG/30WGA 020-045
61WG/30WG/30WGA 050-090
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
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
Condenser - standard unit without hydronic module - Water only
61WG/30WG 020-045
1 61WG/30WG 020
2 61WG/30WG 025 to 61WG/30WG 030
3 61WG/30WG 035
4 61WG/30WG 040
5 61WG/30WG 045
6 61WG/30WG 050
7 61WG/30WG 060
8 61WG/30WG 070
9 61WG/30WG 080
10 61WG/30WG 090
61WG/30WG 050-090
Pressure drop, kPa
Water flow rate, l/s
Pressure drop, kPa
Water flow rate, l/s
Pressure drop, kPa
Water flow rate, l/s
Pressure drop, kPa
Water flow rate, l/s
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.
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.
Summary of Contents for 30WG 020
Page 55: ...55 ...