VOKERA Linea Service Manual download pdf (Page 19)

Linea

SECTION 5 COMMISSIONING

5.1 GAS SUPPLY INSTALLATION

Inspect the entire installation including the gas

meter, test for soundness and purge. Refer to

BS 6891 for specific instruction.

5.2 THE HEATING SYSTEM

The appliance contains components that may be-

come 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.

Fig. 18

5.3 INITIAL FILLING OF THE SYSTEM

Ensure both flow and return service valves are

open, remove appliance casing as described in

4.7.1, identify the automatic air release valve and

loosen the dust cap by turning the cap anti-clock-

wise one full turn. IMPORTANT, THERE ARE

NO MANUAL AIR RELEASE VALVES LOCATED

ON THE APPLIANCE. Ensure all manual air re-

lease valves located on the heating system are

closed. Connect the filling loop as shown in fig.

14, slowly proceed to fill the system by firstly

opening the inlet valve connected to the flow

valve, and then turning the lever on the combined

stopcock and check valve, to the filling position

(see Fig. 18). As water enters the system the

pressure gauge will begin to rise. Once the gauge

has reached 1 BAR close both valves and begin

venting all manual air release valves, starting at

the lowest first. It may be necessary to go back

and top-up the pressure until the entire system

has been filled. Inspect the system for water

soundness, rectifying any leaks.

5.4 INITIAL FLUSHING

The whole of the heating system must be flushed

both cold and hot as detailed in 5.8. Open all

radiator or heating valves and the appliance flow

& return service valves. Drain the boiler and sys-

tem 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 5.3.

5.5 FILLING THE HOT WATER SYSTEM

Close all hot water outlets, turn appliance stop-

cock to the normal operating position (fig. 18),

slowly open each outlet until air has been expelled

and clear water is discharged. Check pipe-work

etc. for water soundness.

5.6 PRE-OPERATION CHECKS

Before attempting the initial lighting of the appli-

ance, 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 7.7) particularly continuity, po-

larity, and resistance to earth.

●●

● Ensure the 3 AMP fuse – supplied with the ap-

pliance – has been fitted.

●●

● Ensure the system has been filled, vented, and

the pressure set to 1 BAR.

●●

● Ensure the flue system has been fitted prop-

erly and in accordance with the instructions.

●●

● Ensure all appliance service valves are open.

5.7 INITIAL LIGHTING

Ensure the electrical supply to the appliance is

switched on. Move the selector switch to the

Heating & Hot Water position, ensure the time

clock is switched to an ‘ON’ position and ensure

any other external controls are also calling for

heat.

The appliance will now operate in the pre-heat

mode as described in 1.2. Once the pre-heat

function has been completed, the appliance will

operate in the central heating mode as described

in 1.3. Should the appliance fail to ignite, refer to

5.6 and/or section 7 (faultfinding).

5.7.1 CHECKING THE BURNER PRESSURE

Although the burner pressure is factory set, it is

necessary to check it during commissioning. Iso-

late the appliance from the electrical supply and

attach a suitable manometer to the gas valve out-

let test-point (see fig. 19). Light the boiler as de-

scribed in 5.7, turn the Hot Water temperature

selector to maximum, and open fully a DHW out-

let (preferably the bath), allowing the appliance

to stabilise. Compare the reading on the manom-

eter with the value described in 2.3. If adjust-

ment is required, follow the detailed instructions

in section 7 (7.3).

Normal

Operating

Position

Filling

Position

Closed

Position

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 51 52

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VOKERA Linea Service Manual Page 19

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