HAMWORTHY HEATING LTD
2
WEYMOUTH
500001112/C
Figure 2 Weymouth Pressurisation Units—Technical Data
Model
Standard
Advanced
Minimum cold fill pressure bar
1.0
Maximum cold fill pressure bar
3.4
Maximum operating pressure bar
7.0
Maximum Flow Rate l/min
6
Maximum water flow rate @
maximum cold fill pressure l/min
0.1
Weight (empty) kg
13
19
Weight (full) kg
16
27
Tank capacity
litres
2.6
7.6
Factory Preset Values
Cold fill pressure bar
1.8
System low pressure switch bar
-
1.3
System high pressure switch bar
-
3.65
To suit system conditions
Maximum water flow temp °C
82
Maximum static height m
30
Minimum system operating pressure bar
3.3
Maximum system operating pressure bar
6.3
Safety relief valve setting (Not HHL supply) bar
4.0
Nominal pressure differential bar
0.4
Electrical Data
Pressure switch contact rating
15A 240V AC
Electrical Supply
230V AC 50Hz 1Ph
Start current
amps
9
Run current
amps
2.8
3.0 SEALED SYSTEM FUNCTION
Figure 3 shows the layout of a typical sealed system.
3.1 Terminology
Expansion Vessel Charge Pressure
The gas pressure in the expansion vessel with water connection open to
atmosphere
System Cold Fill Pressure
The water pressure in the system that the pressurisation unit is set to maintain
