Bristan SK1850- SK1850-2 Original operating manual

Service Instruction
Service InstructionService Instruction
Service Instruction
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Thermostatic Cartridge
Thermostatic CartridgeThermostatic Cartridge
Thermostatic Cartridge
SK1850
SK1850SK1850
SK1850-
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-

The following literature will guide you through servicing and regulating the temperature of your shower valve.
Removal of the cartridge
Removal of the cartridgeRemoval of the cartridge
Removal of the cartridge
1. Turn off both water supplies to the shower valve.
. Remove the centre cap / indice from the centre of the temperature control handle.
3. Remove the centre retaining screw.
4. Remove the temperature control handle assembly.
5. Remove the circlip and then pull off the flow control handle.
6. Once removed pull off the body sleeve which will expose
the cartridge.
7. Having removed all controls from the valve, removal of the
cartridge will require a large 46mm adjustable spanner.
Unscrew the cartridge anti
Unscrew the cartridge antiUnscrew the cartridge anti
Unscrew the cartridge anti-
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-clockwise.
clockwise.clockwise.
clockwise.
8. Having unscrewed the cartridge, it will expose both the thermostat
and piston assembly. The piston sits/rests on a loose spring, when
servicing the valve clean off any debris/dirt on the piston and apply
a thin layer of silicon grease around the clear cylindrical part of the piston
to ease the movement, in doing so this will allow the
thermostat to regulate the temperature.
Before starting any servicing please isolate your water supply b
Before starting any servicing please isolate your water supply bBefore starting any servicing please isolate your water supply b
Before starting any servicing please isolate your water supply by either;
y either;y either;
y either;
1. Turn the water off at the mains supply stopcock
1. Turn the water off at the mains supply stopcock 1. Turn the water off at the mains supply stopcock
1. Turn the water off at the mains supply stopcock
. Turn the water of at the isolations valves to the shower
. Turn the water of at the isolations valves to the shower. Turn the water of at the isolations valves to the shower
. Turn the water of at the isolations valves to the shower
WARNING
0

9. Now that the cartridge is removed from the valve in order to service
the cartridge you will need to remove the large circlip which is situated
between the top of the Brass nut and the bottom of the exposed spindles.
10. Having removed the circlip push the top of the spindle through the
brass nut which will expose the remainder of the cartridge. There is
an O ring in the flow nut, It is important that this is replaced and greased.
11. To dissemble the cartridge you will need to use an adjustable
spanner. Place this onto the hexagon shaped nut and slide a
metal rod or screwdriver through the rectangular slots. Unscrew
the half cartridge anticlockwise.
1 . When the half cartridge has been removed from the top half
you will then need to remove the smaller circlip placed on the
smaller spindle being the temperature control.
Replace all visible O rings.
03

13. Once the circlip has been removed, push the small
spindle through the remainder of the cartridge, then
replace all visible O rings, then reverse action
in re-assembling cartridge and control assembly.
14. Now that all of the seals have been replaced and re greased the cartridge will need to be re assembled.
Re assemble the spindle following the below drawings.
15. Push the brass nut back onto the cartridge and replace the circlip.
16. Screw the cartridge back into the valve body using the 46mm
adjustable spanner.
17. Replace the body sleve and control handles, Replace the
retaining screw and centre cap / indice.
1. Push the spindle into the spindle housing. . Screw the half cartridge back onto the
spindle housing.
Temperature Setting / Adjustment
Temperature Setting / AdjustmentTemperature Setting / Adjustment
Temperature Setting / Adjustment
1. Turn on the water supplies and fully open the flow control, let the water run long enough to
ensure that the hot water supply is at its maximum temperature.
. Remove the indice and unscrew the retaining screw.
3. Turn the temperature knob to the maximum setting then turn the shower on fully with the flow
control, wait until the max temperature is reached.
4. Lift the temperature knob 3-5mm off the spline of the cartridge.
5. Turn the temperature knob anti-clockwise to increase temperature and clockwise to decrease
temperature.
6. Having reached your desired temperature, turn the shower off, reset the temperature knob,
Matching the indicator dots on the temperature knob up to the temperature ring.
7. Replace the retaining screw in the allocated slot and push the covering cap back into place.
04

Inlets reversed (hot supply to cold supply) check that the
connections are the correct way round. Hot on the left and cold
on the right when viewed from the front.
only hot or cold water from the mixer
outlet
Cartridge seals damaged, replace as necessary.leaking from controls
This is normal for a short period after shut off.water leaking from shower head
Check that the pressures do not exceed the specification for the
product.
Cartridge seals damaged, replace as necessary.
Air lock or partial blockage in the pipework.
Make sure the inlet temperature differentials are sufficient.
The inlet hot water temperature must be at least 10ºC above
the required blend temperature.
The maximum recommended hot supply is 60ºC.
Make sure that the maintained inlet pressures are nominally
balanced and sufficient.
Check the shower handset, hose and filters for any blockage.fluctuating or reduced flow
Installation conditions outside operating parameters. Refer to
specification section.
Winter conditions - If using combination boiler system and
shower output temperature is low, please contact Bristan for
guidance.
Check insert filters for any blockage.
No hot or cold water reaching mixer.outlet temperature too hot / cold
Rework pipework if necessary.
cause / rectificationsymptoms
fault diagnosis
fault diagnosisfault diagnosis
fault diagnosis
05

Bristan Spare Part Numbers
Bristan Spare Part NumbersBristan Spare Part Numbers
Bristan Spare Part Numbers
Thermostat & Piston – SK1500-3
Complete Cartridge – SK1850-
Seal Kit - SK1850-1
06

Notes
07
Use this page for any notes that you have regarding the servicing of your shower valve.

This booklet covers servicing of
SK1850-
Helpline
HelplineHelpline
Helpline
0844 701 6 73
0844 701 6 730844 701 6 73
0844 701 6 73
Bristan Group Limited
Birch Coppice Business Park, Dordon, Tamworth, Staffordshire B78 1SG
A Masco Company
Website: www.bristan.com
Telephone: [phone] Facsimile: 0844 701 6 75
Email: [e-mail]
FI (SI SK1850- ) – REV. D1