Glow-worm Xtrafast 96-120 - Manual (Page 32)

32 2000221595
19 Replacement of Parts
19.10 Three-way valve head, refer to diagram
19.9.
Before starting refer to the front of Section 19 Important
information.
• Remove the front panel, refer to Section 16.3.
• Lower the control panel, refer to Section 16.4.
• Locate 3- way valve in centre of lower controls area.
• Remove electrical plug from valve head.
• Pull out slotted metal clip from valve body and remove valve
head from body.
• Fit replacement valve head.
Note :
1) When refitting clip, ensure that letters OK are as shown.
2) It is not necessary to drain boiler to carry out this work.
19.11 Three-way valve actuator, refer to
diagram 19.10.
Before starting refer to the front of Section 19 Important
information.
• Remove the front panel, refer to Section 16.3.
• Lower the control panel, refer to Section 16.4.
• Drain down central heating and domestic hot water circuit of
boiler only, refer to relevant parts of Sections 16.13 and 19.8.
Note: It is not necessary to drain down entire heating system to
carry out this work.
• Remove three-way valve head, refer to Section 19.10.
• Pull out slotted metal clips and remove bypass pipe.
• Remove three-way valve actuator from three-way bypass
valve housing.
• Fit replacement three-way valve actuator into three-way
bypass valve housing.
19.12 Bypass, refer to diagram 19.11.
Before starting refer to the front of Section 19 Important
information.
• Remove the front panel, refer to Section 16.3.
• Lower the control panel, refer to Section 16.4.
Drain down central heating water circuit and drain the boiler,
refer to relevant part of Section 19.8.
Note: it is not necessary to drain down the entire heating system
to carry out this work.
Pull out slotted metal clips and remove bypass pipe.
Pull out slotted metal clip securing bypass into bypass housing,
ease up and out bypass valve using a screw driver.
Diagram 19.12
9675
➜
SYSTEM WATER
PRESSURE SENSOR
Diagram 19.11
➜
➜
➜
9893
➜
➜
➜
19.13 System water pressure sensor, refer to
diagram 19.12.
Before starting refer to the front of Section 19 Important
information.
• Remove the front panel, refer to Section 16.3.
• Lower the control panel, refer to Section 16.4.
.Drain down central heating water circuit and drain the boiler,
refer to relevant part of Section 19.8.
• Locate system water pressure sensor at front left hand side of
boiler.
• Pull off slotted metal clip and remove sensor from boiler, take
care not to strain cables.
• Remove electrical connection from sensor.
9951