System Filling - Ideal Heating i305 Installation & Servicing

PRESSURE RELIEF VALVE (INDIRECT
ONLY)
The safety valve connection, located at the
bottom right-hand side of the HIU, comprises a
15mm diameter stub pipe.
The installer must provide a suitable joint on
the end of the stub pipe. This assists with pipe
removal when servicing.
The discharge pipe must 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.

2.5 SYSTEM FILLING

Note: Isolation valves are labelled A to F from left to right.
Filling DHW
1. Ensure all taps in the property are turned off.
2. Turn the blue valve handle on isolation valve A to the "run"
position (handle pointing downward).
3. Turn on the incoming mains water supply.
With a suitable hose and container fitted to the upper far
4.
left air vent, open upper DHW vent screw to allow air to
A
exit. As soon as air free water flow is detected close the
B
vent.
C
D
5. Turn isolation valve B to the "run" position (handle pointing
upwards).
6. Open the furthest tap from the unit to vent any air from the
system.
Filling CH / Topping up (Indirect Ony)
1. Ensure isolation valves A, E and F are in the "run" position
(handle vertical) and isolation valve G is in the "off"
position (handle opposing body).
A
Remove the dust cap from valve A and plug from the filling
2.
loop adjacent to valve A.
Ensure top hat washers is still fitted to the valve A (if not
3.
then check inside the removed dust cap).
Installation and Servicing
SECTION 2 - INSTALLATION
E
G
F
F
G E
Safety Valve
Drain Connection
15mm elbow
or fittings
(not supplied)
Connect the filling loop to valve A.
4.
Note: Heat Interface Unit not shown for clarity
Filling Loop Hose
A
5. Turn isolation valve A to the "fill" position (handle
horizontal).
6. Turn valve G to the "fill" position (handle in line with valve
body). The CH circuit will begin to fill.
7. Monitor the pressure gauge until the correct pressure
is achieved (max 2.75 Bar, recommended 1 – 1.5 bar
for normal operation) then turn isolation valve G to the
"off" position (handle opposing valve body) to isolate the
charge supply.
Pressure Relief Valve
Drain Pipe
(not supplied)
G
F
E
Continued....
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