VOKERA Linea Installation & Servicing Instructions Manual - page 21
Supplied By www.heating spares.co Tel. 0161 620 6677
17
Linea Max
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
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
See 3.4.3.
6.3.2.2
Open central heating flow and return valves.
Unscrew black cap on automatic air release
valve (26) one full turn. (Leave open perma-
nently).
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. See fig.5.
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.
21) i) Vertically up - closed position.
ii) Turn to the left to horizontal - filling
position.
iii) Turn to the right to horizontal - normal
operating position.
To fill, 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.
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
6.10.1. 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 lighting. 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 re-
quired 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 operat-
ing position (horizontally to the right). See
fig.21
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,
polarity, and resistance to earth (see page
61), gaining access as required according to
5.5.2 in this manual.
6.4.2
Leave the appliance with the control fascia
open and with the mains electricity switched
OFF
6.5
Lighting the Boiler
6.5.1
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 commission-
ing of the appliance 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
5.5.2 for instructions).
6.5.2
Switch on the mains electricity and turn the
on / off / mode switch to
6.5.3
Set the c/h control knob to the highest
setting.
6.5.4
The pump only will run for approximately 1
minute, the appliance will then go through
an ignition sequence and the burner will
light.