Hamworthy 563216020, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD
13
CHESIL-ELECTRONIC 500001181/K
7.5 Initial Setting of Unit
Each unit comes with a selection of inserts that can be fitted into the inlet valve to achieve the required output:
Mains inlet pressure > 4 bar H.P. restrictor (white see fig 12)
Mains inlet pressure < 4 bar L.P. restrictor (red see fig 12)
The HP restrictor is fitted in the inlet side of the float valve assembly. This
should be unscrewed in order to change the restrictor (see fig 13). The LP
Restrictor is clipped to the side of the valve assembly.
3) If the cold water is from a tank then the tank must be at least 2m above the inlet for the header tank to remain
full when the pump is working at maximum rate. The pressurisation units should not be used to fill a heating
system.
4) Check that the unit has been connected to the system using a suitable isolation valve.
5) Check that the mains lead has been connected to a suitably fused and switched isolator.
6) The cold fill pressure on the units are factory set to the levels listed in figure 3 as are the Hi & Lo pressure
alarms. If these levels are unsuitable for the installation then adjustment will be necessary.
7) Set the float to its lowest level. (fig 14)
7.6 Filling The Unit
1) Check all connections and pressures. Remove front cover by unscrewing securing screw at base of unit and
lifting cover up and slide forwards.
2) Undo the priming screw on pump head (fig 15). Prime until air stops escaping. Close the screw & turn on the
supply to the unit (keeping system isolation valve closed). Pump will run for a few seconds until set pressure is
reached.
3) Check for any leaks within the unit, if OK open system isolation valve.
4) The unit will now monitor the system and keep it at the required pressure.
Figure 15 - Priming Screw
Figure 12 - Restrictor Inserts
Figure 13 - Changing Restrictor Inserts
Figure 14 - Float Adjustment