28
INSTALLATION
i-mini -
Installation and Servicing
Safety
Drain
Valve
Black
Handle
Yellow
Handle
Black
Handle
Blue
Handle
205367-9927b
CH Flow
DHW Outlet
Gas Supply
CH Return
DHW Inlet
Gas Pressure
Test Point
23
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 provided in the
hardware pack to the threaded boss connection
provided at the lower rear of the boiler.
2.
Connect the CH return valve (black handle).
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 information refer to “Gas Supply” on
page 10.
SAFETY VALVE DRAIN
The safety valve connection, located at the bottom right-hand
side of the boiler, comprises a 15mm diameter stub pipe.
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.
fillinG
iMPoRtAnt
- when filling:
A.
Ensure the dust cap on air vent
located at the rear of the pump
chamber is slightly unscrewed.
b.
When filling, there may be a slight
water leak from the air vent therefore
electrical connections should be
protected.
CH -
1. Ensure that the CH isolating
handles are open.
2.
Fill and vent the system. Refer to
Frame 2 for setting pressure.
dHW -
1.
Fully open all DHW taps and ensure
that water flows freely from the.
2.
Close all taps.
Dust Cap
WAteR ConneCtionS dHW
1.
Fit the DHW inlet service valve (blue handle) 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.
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.
note.
The DHW flow rate is automatically regulated to a max:
24 = 9.9 l/m (2.2 gpm)
30 = 12.4 l/m (2.8 gpm)
Note that all isolation
handles are shown in the
open postion.
Pressure Relief Valve
Drain Connection
15mm elbow
or fittings
(not supplied)
Pressure Relief Valve
Drain Pipe
in
S
t
A
ll
A
tion
