Nuie CPB8311 User manual

'PUSH CONTROL' CONCEALED
THERMOSTATIC SHOWER VALVES
(1, 2 & 3 Outlet Models)
Important information (Please leave this installation & user guide with the end user)
This installation guide is for all the 'Push Control' Thermostatic shower valves. It covers the installation and
operation of the Shower Valves.
All 'Push Control' concealed models are thermostatically controlled using a Valquest patented
cartridge.
They have been designed to provide a flow of water at a safe temperature when installed as described
in this manual. The valves are suitable for use on pressure from as low as 1 bar.
To activate the shower, a simple press of the Push Button Flow Control (PBFC) starts or stops the flow of
water from the shower outlet.
Depending on your chosen model, the PBFC's work independently of each other. So, if your chosen
model has multi PBFC's, they can be used individually, or you can enjoy up to two shower outlets
together (dependant upon on your water pressure - see flow rate data).
The valves are also suitable, without modification, for all types of installation, including pumped*, gravity
systems, mains pressure and combination boilers.
*There are lots of choices with shower pumps, including positive or negative head pumps -
Please ask your installer to confirm which will be suitable for your specific installation.
Safety
We recommend that this product is fitted by a fully qualified installer. The installation must comply with
all current water regulations. Please note: This valve MUST be commissioned during installation to suit site
conditions. In order for this product to operate as designed it must be installed and commissioned as
stated in this manual.

Components List - 1 Outlet Model:
Key Dimensions:
MAIN SHOWER VALVE BODY
VALQUEST THERMOSTATIC VALVE
CHROME COLLAR &
GUIDE SLEEVE
THERMOSTATIC CARTRIDGE LOCK NUT
CONCEALING PLATE
THERMOSTATIC CONTROL HANDLE
BUSH
PUSH BUTTON FLOW CONTROL
PUSH BUTTON GUIDE SLEEVE
BUSH SCREW
PUSH BUTTON HANDLE BUSH
PUSH BUTTON CARTRIDGE LOCK NUT
CHECK VALVE ASSEMBLY
PUSH BUTTON CARTRIDGE
FIXING LUGS
BUSH SCREW
66
177
22
2
80
215
80
45
45
22.5
22.5
2
85-97
68.5

Components List - 2 Outlet Model:
Key Dimensions:
THERMOSTATIC CONTROL HANDLE
BUSH SCREW
PUSH BUTTON FLOW CONTROL x2 CONCEALING PLATE
BUSH
VALQUEST THERMOSTATIC VALVE
CHROME COLLAR &
GUIDE SLEEVE
THERMOSTATIC CARTRIDGE LOCK NUT
CHECK VALVE ASSEMBLY
FIXING LUGS
MAIN SHOWER VALVE BODY
PUSH BUTTON GUIDE SLEEVE
BUSH SCREW
PUSH BUTTON HANDLE BUSH
PUSH BUTTON CARTRIDGE LOCK NUT
PUSH BUTTON CARTRIDGE
80
260
45
4522.522.5
45
80
22.5 2
27
207
22
66
2
68.5
85-97

Components List - 3 Outlet Model:
Key Dimensions:
BUSH SCREW
CONCEALING PLATE
BUSH
THERMOSTATIC CARTRIDGE LOCK NUT
CHROME COLLAR & GUIDE SLEEVE
VALQUEST THERMOSTATIC VALVE
CHECK VALVE ASSEMBLY
FIXING LUGS
MAIN SHOWER VALVE BODY
PUSH BUTTON GUIDE SLEEVE
BUSH SCREW
PUSH BUTTON HANDLE BUSH
PUSH BUTTON CARTRIDGE LOCK NUT
PUSH BUTTON CARTRIDGE
THERMOSTATIC CONTROL HANDLE
PUSH BUTTON FLOW CONTROL x3
305
804545
80
22.5
45
4522.522.522.5
27
267
2
22
66
2
68.5
85-97

All Valves:
The hot inlet of the valve must always be connected to the hot pipework. The hot inlet of the valve is
clearly marked. Failure to follow this instruction will mean the valve will not operate correctly.
Cartridge Reversal:
Please note that the pipe work on site should be plumbed with the hot on the left and the cold on the
right as you look at it. If this is not the case, instead of turning the valve body around to match the pipe
work, the cartridge can be taken out of the valve body, turned 180° and placed back in the valve
body. The Hot & Cold inlets will now match the incoming water.
When removing the cartridge, please undo the retaining nut and then pull gently on the cartridge.
There may be some residual water behind the cartridge. Remove the cartridge from the valve body
and turn it 180° so that the positional lug on the cartridge lines up with the slot in the valve body.
Push the cartridge into the valve body making sure the lug is in the slot. Replace the retaining nut
being careful not to over tighten.
Technical Data
Min operating pressure: 1 bar
Max operating Pressure: 5 bar
Factory Outlet Temperature Setting: 43°c
Minimum Temperature Differential (Mixed water to hot water): 10°C Temperature Stability: ±2°C
FLOW RATE DATA
1 OUTLET MODEL
2 OUTLET MODEL
1 OUTLET
2 OUTLET COMBINED
3 OUTLET MODEL
1 OUTLET
2 OUTLET COMBINED
3 OUTLET COMBINED
Ltr/min
BAR 1
11.1
2
16.1
3
19.7
4
22.8
5
25.2
8.1 12.6 15.6 18.0 20.2
12.0 19.5 24.5 28.5 32.0
13.8 21.8 28.0 32.9 37.0
To activate the shower, a simple press of the PBFC starts or stops the flow of water from the shower
outlet. To control the temperature, turn the temperature control handle clockwise to reduce the
water temperature, and turn anti-clockwise to increase the water temperature.
CARTRIDGE
POSITIONAL LUG
8.9
12.4
13.6
19.7
16.7
24.9
19.4
29.0
21.7
32.6
Operation
Installation
Ltr/min
Ltr/min
Ltr/min
Ltr/min
Ltr/min
BAR 1 2 3 4 5
BAR 1 2 3 4 5

NB There is some in-wall depth adjustment on this shower valve to assist with installation.
This needs to be planned before installation commences. See basic valve dimensions for guidance.
1. Remove the chrome collar and guide sleeve from the shower valve body, and leave to one
side in a safe place.
2. You must install accessible isolation valves in the HOT & COLD water supply lines for servicing
purposes.
3. The plumbing connections on the inlets & outlet are all ½” BSP female threads.
4. Determine the fixing position and make a suitable recess in the wall to house the valve body.
NB This space should leave enough access to be able to service the valve body and all it's
connection points after the concealing plate is removed.
In order for the push-button(s) to operate freely, the valve body must be set parallel to
the concealing plate when set into the wall.
5. Secure the shower valve body in position to a suitable fixing point, using the fixing lugs that are
cast into the base of the body.
6. Now the shower valve body is securely mounted in the wall recess, make sure the pipe work is
thoroughly flushed through to remove any debris from the system before connecting the water
supplies to the valve body. NB Failure to do this could invalidate the guarantee.
7. The plumbing connections should then be made to the HOT & COLD water inlets (which are
clearly marked). If for some reason the pipe work feeds on site are the wrong way around, the
cartridge can be taken out of the valve body, turned 180° and placed back in the valve body.
See cartridge reversal instruction for guidance on this.
8. Make the plumbing connection(s) to the water outlet. This will take the water to the chosen
auxiliary product (shower kit) you have selected to run with this shower.
9. Turn on the water supply and check for leaks.
10. Check the maximum water temperature from the terminal fitting with a thermometer.
The recommended maximum terminal outlet temperature is 43°C.
11. The valve can now be commissioned.
12. Re-fit the chrome collar & guide sleeve to the valve body.
13. Remove the push button guide sleeve from the back of the concealing plate and securely
screw this onto the push button cartridge lock nut.
14. Push the concealing plate over the controls, applying a small bead of silicone behind the
concealing plate to create a water tight seal so that water cannot ingress into the wall
cavity.
15. Fit the push button flow control over the push button handle bush and press into position
making sure it goes over the two "O" rings for a snug fit.
16. Fit the thermostatic control handle.
17. Your shower valve is now ready for use.

1. Remove the handle on the thermostat control. The method will differ depending on the handle
type. The spline/Brass stop Ring will now be exposed.
2. If a Brass Stop Ring is in place, please remove it. Press one of the push button flow controls to
activate the flow.
3. If the shower is too cold then turn the spline anti-clockwise. If the shower is too hot then turn the
spline clockwise. Let the water temperature stabilise after every adjustment.
We recommend a max temperature of 43°C.
4. When the temperature is correct, press the push button flow control again to stop the water flow.
Do not move the spline again until after the handle is secured in place. The max temperature is
now set and any movement of the spline will alter the temperature.
5. The handle can now be put back in place. When the handle is being placed over the spline,
please ensure that the handle Stop Lug is against the cartridge Stop Lug preventing the handle
from being turned any further anti clockwise. This prevents the shower valve from reaching a
temperature that is higher than the set point.
Depending on your handle type the temperature will be limited by a handle with an in build stop
lug or by a separate Brass Stop Ring. Please see the diagrams below.
6. The handle can now be fixed in place. The shower should have a safe maximum showering
temperature.
Cartridge Stop Lug
The handle stop lug should be against this
face at the maximum temperature setting.
This stops further anti-clockwise movement
SPLINE
Aftercare
·When cleaning the valve please do not use a substance that could possibly damage the surface finish.
We recommend that soapy water with a mild detergent is used.
·Please take care not to damage the surface finish of the valve. The finish is polished chrome and can be
easily marked.
Brass Stop Ring
Some handle types have a brass stop ring
which is placed over the spline and limits the
anti-clockwise movement of the handle.
STOP LUG
Temperature Adjustment

Diagnostics
Symptoms Possible Cause
1.1 Temperature set point incorrectly
commissioned.
1. The showering water temperature
is too hot.
1.2 Not enough cold water getting
to the valve.
1.3 Ambient cold water temperature
has increased.
2.1 Temperature set point incorrectly
commissioned.
2.2 Not enough hot water getting to
the valve.
2.3 Ambient cold water temperature
has decreased.
2. The showering water temperature
is too cold. 2.4 Operating conditions are
incorrect.
2.5 Hot water supply temperature
not hot enough.
Action Required
1.1.1 Please see temperature adjustment section.
1.2.1 Please see temperature adjustment section.
1.2.2 Check for blockage in supply pipes.
1.2.3 Check for blockage in check valve filters.
1.3.1 Re position the temperature control handle - see
temperature adjustment section.
2.1.1 Please see temperature adjustment section.
2.2.1 Please see temperature adjustment section.
2.2.2 Check for blockage in supply pipes.
2.2.3 Check for blockage in check valve filters.
2.3.1 Re position the temperature control handle - see
temperature adjustment section.
2.4.1. See Technical data for correct operating pressures.
2.5.1 Check that the hot water temperature at a basin
tap is acceptable, which should be around 55-60 deg.
If it isn’t, make sure the heating appliance is adjusted to
increase the hot supply temperature.
2.5.2 Make sure the heating appliance has sufficient hot
water storage capacity.
3. Water is not mixing correctly, or
shower temperature is varying.
3.1 Hot and cold water supplies are
plumbed to the wrong side of the
valve body.
3.1.1 Remove the Valquest thermostatic cartridge, turn
180 degrees and replace.
4.1 Possible blockage in the system.
4.2 Operating conditions are
incorrect.
4.3 Valve is obstructed by debris.
4. Low or no water flow from shower
(single and multi-outlet showers).
4.4 Valve anti-scald has activated
due to operating conditions.
4.5 Water supplies have been cut off.
4.6 Shower outlet may be blocked
(handset, shower head etc).
4.7 Multiple shower outlets are not
getting enough water.
4.1.1 Check & clean any filters as necessary.
4.1.2 Supply pipe work may be blocked. Consult a
qualified installer.
4.1.3 Make sure any in line service isolator valves are in
the fully open position.
4.2.1 See Technical data for correct operating pressures.
4.3.1 Clean check valves.
4.4.1 See Technical data for correct operating pressures
and inlet water supply temperatures.
4.5.1 Check other water outlets elsewhere in the house,
and contact water authority if necessary.
4.6.1 Clean the shower outlet.
4.7.1 Make sure your system is capable of delivering the
required volume of water.
4.7.2 Make sure any in line service isolator valves are in
the fully open position.
5. Leak when shower valve in “off”
position.
5.1 Check that the leak is from the
shower valve and not residual of
water in the shower head / handset.
5.1.1 Remove the shower head / handset from its’ feed to
see if any water is dripping from the flexible hose or
shower arm. If this is not leaking you are experiencing
residual water in the shower fitting which is not a fault.
5.1.2 If the leak is from the shower valve, a new flow
control cartridge is required.
6.1 Possible blockage in the system.
6. Fluctuating flow rate.
6.2 Operating conditions are
incorrect.
6.3 Dynamic inlet pressures are not
balanced.
6.1.1 Check & clean any filters as necessary.
6.1.2 Make sure any in line service isolator valves are in
the fully open position.
6.1.3 Supply pipe work may be blocked. Consult a
qualified installer.
6.2.1 See Technical data for correct operating pressures.
6.3.1 Consult a qualified installer.
GEN033