HAMWORTHY HEATING LTD
MILBORNE 500 SERIES
500001130/A
9
Hydraulic Connections
Figure 7.3 & 7.4 show the hydraulic connections and their size and type.
To make hydraulic connections easier, two kits are available: one for the installation of one single Milborne 502,
figure 7.3, the other for the installation of two Milbornes series 500 as a set, figure 7.4.
Kit for a Single Milborne 502 (up to 100kW)
Hamworthy kit ref. PKS502, HHL Part No
573407124, Fig 7.3.
Comprising of;
1 x gas header, diameter 50 mm.
1 x flow header, diameter 50 mm.
1 x return header, diameter 50 mm.
Each header is fitted with 2 x 25 mm branch pipe
connections for flow and return and 2 x 19 mm for
gas connections to each boiler is made using
isolating valves, and for the flow connections a 3
port isolation vent valve.
Optional wall support brackets as shown.
Kit for two Milborne 502 boilers installed in
series (up to 600 kW)
Hamworthy kit ref PKD502, HHL Part No.
573407125, Fig 7.4
1 x gas header, diameter 3” PN6
1 x flow header, diameter 3” PN6
1 x return header, diameter 3” PN6
Each header is fitted with a 4 x 25 mm branch pipe
connections for flow and return and 4 x 19 mm gas
connections to each boiler unit. Final connection to
the boiler is made using isolating valves, and for
the flow connections a 3 port isolation vent valve.
Standard wall support brackets as shown.
Figure 7.3 - Single Milborne 502
Figure 7.4 - 2 x Milborne 502
Note: When Installing multiple boilers the Master Boiler must be placed closest to the heating system to
allow correct location for the common flow temperature sensor.