VOKERA Linea Max HE Installation & Servicing Instructions Manual - page 25
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LINEA MAX HE
21
SECTION 6 COMMISSIONING
6.1
Where the text bears identifying numbers in
brackets, refer to figs. 1 and 2 unless otherwise
instructed.
6.2
Gas Supply Installation
Inspect the entire installation including the meter.
Test for soundness and purge, all as described in
BS6891:1988.
6.3
Central Heating Systems
The appliance contains components that may
become damaged or rendered inoperable by oils
and/or debris that are residual from the installa-
tion of the system, consequently it is essential
that the system be flushed in accordance with the
following instructions.
6.3.1
IMPORTANT DO NOT RELEASE AIR FROM
THE RED SEALED EXPANSION TANK. It is
charged with air at the factory from .75 - .80 bar
(11 - 12psig)
6.3.2
Initial filling of the System
6.3.2.1
Means of filling sealed system: To accord with BS
and/or local Water Authority requirements.
6.3.2.2
Open central heating flow and return valves.
Unscrew black cap on automatic air release valve
(25) one full turn. (Leave open permanently).
6.3.2.3
Close all air release taps on the central heating
system.
6.3.2.4
Identify the filling/inlet valve found at the base of
the appliance and the C/H filling cock. See fig. 6
& 22.
The filling loop may have been disconnected from
the filling/inlet valve and heating flow valve. If so
reconnect unscrewing the caps as necessary.
The filling/inlet valve has 3 positions. (Fig. 22)
i) Vertically up - closed position.
ii) Turn to the left to horizontal - filling position.
iii) Turn to the right to horizontal - normal opera-
ting position.
To fill, open the C/H filling cock and slowly turn
the handle of the filling/inlet valve from the closed
position towards the filling position. Mains water
will be heard to enter the system/boiler. As the
water enters the system/ boiler the pressure
gauge will be seen to rise. Pressurise to between
1bar & 1.5bar when the system is cold. DO NOT
OVERPRESSURISE. Once the desired pressure
is achieved turn the filling/inlet valve back to the
closed position and close C/H filling cock.
6.3.2.5
Starting with the lowest radiator open each air
release tap in turn closing it only when clear
water, free of bubbles, flows out. In the same
away release air from any high points in the
pipework.
6.3.2.6
Continue filling the system until at least 1.0 bar
registers on the gauge then turn the handle of the
filling/inlet valve back to the closed position.
6.3.2.7
Inspect the system for water soundness and
remedy any leaks discovered.
6.3.3
Initial Flushing of the Pipework
The whole of the heating system must be flushed
both cold and later hot as detailed in 6.11.1.
Open all radiator or heating valves and the
appliance central heating valves.
Drain the boiler and system from the lowest
points. Open the drain valve full bore to remove
any installation debris from the boiler prior to ligh-
ting. Refill the boiler and heating system as
described in 6.3.2.
6.3.4
Setting the System Design Pressure
6.3.4.1
The design pressure should be a minimum of 1
bar and maximum 1.5 bar.
6.3.4.2
The actual reading should ideally be 1 bar plus
the equivalent height in metres to the highest
point of the system above the base of the
appliance. (Up to the maximum of 1.5 bar total).
N.B. The safety valve is set to lift at 3bar/ 30m /
45psig.
6.3.4.3
To lower the system pressure to the required
value, pull the lever on the head of the safety
valve to release water until the required figure
registers on the gauge.
6.3.5
Filling the Hot Water System
6.3.5.1
Close all hot water draw-off taps.
6.3.5.2
Turn filling/inlet valve to the normal operating
position (horizontally to the right). See fig.22
6.3.5.3
Slowly open each draw-off until clear water is
discharged.
6.4
Checking Electricity Supply
6.4.1
Carry out preliminary checks for continuity, pola-
rity, and resistance to earth, gaining access as
required according to 5.6.2 in this manual.
6.4.2
Leave the appliance with the control fascia open
and with the mains electricity switched OFF
6.5
Pre-operation Check
Before attempting the initial lighting of the
appliance, the following checks must be carried
out:
Ensure all gas service valves from the meter to
the appliance are open and the supply pipe has
been properly purged.
Ensure the proper electrical checks have been
carried out, (see section 10) particularly conti-
nuity, polarity, and resistance to earth
Ensure the 3 AMP fuse – supplied with the
appliance – has been fitted.
Ensure the system has been filled, vented, and
the pressure set to 1 BAR.
Ensure the flue system has been fitted properly
and in accordance with the instructions.
Ensure all appliance service valves are open.
6.6
Lighting the Boiler
6.6.1
Ensure flow and return valves are open.
If external and/or internal controls are fitted (e.g
Timeclock and/or Room thermostat) ensure they
‘call for heat’. The commissioning of the applian-
ce may be easier if the external/internal controls
are disconnected and terminals 2 & 3 are linked.
(For access procedure turn off electricity and
refer to 5.6.2 for instructions).