Grant VTXCOMBI26 Manual

Grant Vortex
Removal of low pressure switch from the Grant
vortex pro range of Combination boilers
Contents
1

IntRoDUCtIon

2 Removal of CURRent
swItCh
3 Fitting Of Cap
1 IntRoDUCtIon
1.1 GeneRal
! waRnInG !
Do not remove the low pressure switch if there is plastic
pipework fitted on the system.
This cap is intended for use on the following Grant UK boilers:
• Internal Combi models (yellow flame):
• VTXCOMBI21
• VTXCOMBI26
• VTXCOMBI36
• VTXXSCOMBI26
• External Combi modules (yellow flame):
• VTXOMCOMBI21
• VTXOMCOMBI26
• VTXOMCOMBI36
• Internal Combi models (blue flame):
• VTXBFCOMBI21
• VTXBFCOMBI26
• VTXBFCOMBI36
• External Combi modules (blue flame):
• VTXBFOMCOM21
• VTXBFOMCOM26
• VTXBFOMCOM36
! note !
All work is to be carried out by a trained and competent
person.
1.2

KIt Contents

• 1 x ¼ʺ cap
pRoDUCt CoDes CoveReD
These instructions cover the following product codes:
MPCBSCAP
2
1
The procedure for removing the current low pressure switch is as
1
follows:
Firstly, set the boiler on/off switch to OFF and ensure the boiler is
isolated from the electrical supply at the fused spur/isolator.
Internal Boilers
2
1.
2.
3.
4.
5.
6.
7.
8.
External Boilers
1.
2.
3.
4.
5.
6.
7.
page 1
Removal of CURRent
swItCh
Remove the front and top front casing panels.
Remove the two screws securing the terminal block cover
and lift off the cover.
Loosen (do not remove) the four screws securing the control
panel to the side panels, hinge the panel forward and allow it
to drop down to gain access to the top of the panel.
Remove the screws securing the cable clamp and the p-clip.
Disconnect the low pressure switch cable connections from
terminals 15 and 16 (blue and brown wires).
To prevent excessive water entering the boiler, remove the
initial system pressure by ensuring that the filling loop has
been isolated. Then open up the drain valve at the front of
the boiler and contain any fluid in a suitable receptacle.
! CaUtIon !
allow the boiler to cool before releasing water pressure
from the heating system.
Isolate the low pressure switch pipework by closing the pump
valve on the flow and the isolation valves on the return.
Disconnect the low pressure switch by undoing the threaded
connection and remove from the boiler.
Remove the boiler door, top casing panel and insulation from
the boiler.
Remove the two screws at the top of the control panel (in
cross member) and allow the panel to hinge forward.
Remove the two screws securing the cable clamp.
Disconnect the low pressure switch cable connections from
terminals 15 and 16 (blue and brown wires).
To prevent excessive water entering the boiler, remove the
initial system pressure by ensuring that the filling loop has
been isolated. Then open up the drain valve at the front of
the boiler and contain any fluid in a suitable receptacle.
! CaUtIon !
allow the boiler to cool before releasing water pressure
from the heating system.
Isolate the low pressure switch pipework by closing the pump
valve on the flow and the isolation valves on the return.
Disconnect the low pressure switch by undoing the threaded
connection and remove from the boiler.
october 2017
DoC 0119
Rev 1.0