CONTENTS
1 INTRODUCTION 1
2 REMOVAL OF CURRENT 1
SWITCH
3 FITTING OF CAP 2
1 INTRODUCTION
1.1 GENERAL
! WARNING !
Do not remove the low pressure switch if there is plastic
pipework tted on the system.
This cap is intended for use on the following Grant UK boilers:
• InternalCombimodels(yellowame):
• VTXCOMBI21
• VTXCOMBI26
• VTXCOMBI36
• VTXXSCOMBI26
• ExternalCombimodules(yellowame):
• VTXOMCOMBI21
• VTXOMCOMBI26
• VTXOMCOMBI36
• InternalCombimodels(blueame):
• VTXBFCOMBI21
• VTXBFCOMBI26
• VTXBFCOMBI36
• ExternalCombimodules(blueame):
• VTXBFOMCOM21
• VTXBFOMCOM26
• VTXBFOMCOM36
! NOTE !
All work is to be carried out by a trained and competent
person.
1.2 KIT CONTENTS
• 1x¼ʺcap
2 REMOVAL OF CURRENT
SWITCH
The procedure for removing the current low pressure switch is as
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
1. Remove the front and top front casing panels.
2. Remove the two screws securing the terminal block cover
and lift off the cover.
3. Loosen(donotremove)thefourscrewssecuringthecontrol
panel to the side panels, hinge the panel forward and allow it
to drop down to gain access to the top of the panel.
4. Remove the screws securing the cable clamp and the p-clip.
5. Disconnect the low pressure switch cable connections from
terminals15and16(blueandbrownwires).
6. To prevent excessive water entering the boiler, remove the
initialsystempressurebyensuringthatthellingloophas
been isolated. Then open up the drain valve at the front of
theboilerandcontainanyuidinasuitablereceptacle.
! CAUTION !
Allow the boiler to cool before releasing water pressure
from the heating system.
7. Isolate the low pressure switch pipework by closing the pump
valveontheowandtheisolationvalvesonthereturn.
8. Disconnect the low pressure switch by undoing the threaded
connection and remove from the boiler.
EXTERNAL BOILERS
1. Remove the boiler door, top casing panel and insulation from
the boiler.
2. Remove the two screws at the top of the control panel (in
crossmember)andallowthepaneltohingeforward.
3. Remove the two screws securing the cable clamp.
4. Disconnect the low pressure switch cable connections from
terminals15and16(blueandbrownwires).
5. To prevent excessive water entering the boiler, remove the
initialsystempressurebyensuringthatthellingloophas
been isolated. Then open up the drain valve at the front of
theboilerandcontainanyuidinasuitablereceptacle.
! CAUTION !
Allow the boiler to cool before releasing water pressure
from the heating system.
6. Isolate the low pressure switch pipework by closing the pump
valveontheowandtheisolationvalvesonthereturn.
7. Disconnect the low pressure switch by undoing the threaded
connection and remove from the boiler.
October 2017
DOC 0119
Rev 1.0
Grant Vortex
Removal of Low Pressure Switch from the Grant
Vortex Pro range of Combination boilers
PRODUCT CODES COVERED
These instructions cover the following product codes:
MPCBSCAP
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