Zanussi ULTRA COMBI 35 Installation And Servicing page 28

24 CONNECTIONS & FILLING
NOTES.
Ensure all boss blanking plugs are removed before connecting hardware. Each
valve must be fitted to the correct boss as shown in the picture.
Ensure each union is fitted with fibre seals provided.
Do not subject any of the isolating valves to heat as the seals may be damaged.
WATER CONNECTIONS CH
1. Connect the CH flow service valve (black handle) and
copper tail provided in the hardware pack to the threaded
boss connection provided at the lower rear of the boiler.
2. Connect the CH rtn. valve (black handle) and copper tail.
3. If connecting the boiler to heating loads in excess of
60,000 Btu/h, connecting flow and return heating systems
pipework must be sized in 28mm diameter at the point
of pipe connection to the boiler tails. use 22mm x 28mm
pipe adaptors as appropriate.
WATER CONNECTIONS DHW
1. Fit the DHW inlet service valve (blue handle) and copper
tail to the threaded boss connection ensuring the seal
provided is correctly located.
2. Fit the DHW outlet pipe tail to DHW outlet connection,
ensuring the seal provided is correctly located.
3. Fit the filling loop provided between the DHW inlet valve
and the CH return valve.
GAS CONNECTION
IMPORTANT. The gas service cock is sealed with a non-
metallic blue fibre washer, which must not be overheated when
making capillary connections. Refer to Frame 1 for details of
the position of the gas connection.
For additional gas supply info refer to "Gas Supply" on page 10.
28
INSTALLATION
DHW
Outlet
CH Flow
SAFETY VALVE DRAIN
The safety valve connection, located at the bottom right-
hand side of the boiler, comprises a 15mm diameter stub
pipe.
The Installer to provide a compression joint on the end
of the stub pipe. This assists with pipe removal when
servicing.
The discharge pipe should be positioned so that the
discharge of water or steam cannot create a hazard to
the occupants of the premises or damage the electrical
components and wiring.
Safety Valve
Drain Connection
15mm elbow
or fittings
(not supplied)
Gas DHW
Supply Inlet
Filling
Loop
Note. The domestic hot water flow rate is
automatically regulated to a maximum:
30 = 12.4 l/m (2.8 gpm)
35 = 14.5 l/m (3.2 gpm)
Pressure Relief Valve
Drain Pipe
CH
Return
Installation and Servicing