Nuie VSQ2 User manual

SEQUENTIAL SHOWER VALVE
INSTRUCTION MANUAL
PLEASE LEAVE THIS MANUAL WITH THE END USER

CONTENTS
1. INTRODUCTION & SAFETY 1
2. DIMENSIONS 2
3. TECHNICAL DATA 3
4. OPERATION 4
5. COMPONENTS 5
6. SITE INSTALLATION 6-9
7. AFTERCARE 10
8. CALIBRATION 11-13
9. CARTRIDGE REPLACEMENT 14-15
10. FAULT DIAGNOSIS 16
11. INSTALLATION; 17
a) Conditions of use 17
b) Commissioning 18-19
c) Maintenance 19-21
INS005 Rev 1

1
1. INTRODUCTION
This installation guide is for the Thermostatic Sequential Shower Valve.
It covers the installation, maintenance and operation of the Shower
valve. This valve comes either as an Exposed Type Valve or a Concealed
Type Valve. There are different handle and plate types for the valves
depending on which valve was supplied.
The Thermostatic Shower Valve is a sequential valve, for showering
and is thermostatically regulated by a wax element. It is designed to
provide a flow of water at a safe temperature when installed as
described in this manual. The shower valve is suitable for both low and
high pressure installations. The valve is suitable, without modification,
for all types of installation, including pumped gravity systems, mains
pressure and combination boilers.
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 on site to suit site
conditions.
In order for this product to operate as designed it must be installed,
commissioned and maintained as stated in this manual.

2
2. DIMENSIONS
ALL DIMENSIONS ARE APPROXIMATE
Exposed:
Concealed:
ALL DIMENSIONS ARE APPROXIMATE

3
3. TECHNICAL DATA
Max Dynamic Pressure: 5 bar
Min Dynamic Pressure: 0.2 bar
Factory Outlet Temperature Setting: 43°C
Minimum Temperature Differential (Mixed water to hot water): 10°C
Temperature Stability: ±2°C
The valve is suitable, without modification, for all types of installation,
including pumped gravity systems, mains pressure and combination
boilers.

4
4. OPERATION
NOTE: THIS DIAGRAM DEPICTS A LEVER TYPE HANDLE BUT THE OPERATING PRINCIPLE IS THE SAME
REGARDLESS OF THE HANDLE. THE ABOVE IS THE RECOMMENDED LEVER ORIENTATION.
The turning angle of the handle is 180 degrees, as illustrated above.
This is from the fully closed position to the fully hot position. The cold
water will get hot gradually from the off position through the 180°
turn.
HOT
OFF

5
5. COMPONENTS
Exposed:
Concealed:

6
6. SITE INSTALLATION
We recommend that this product is fitted by a fully qualified
installer. Please note: This valve MUST be commissioned on
site to suit site conditions and the installation must comply
with all current water regulations.
Please ensure that all components are in the box prior to
fitting.
There are Check Valves and Filters in the Elbows of this
product.
Please ensure that the site conditions are suitable for the
installation of this product. The ideal site conditions can be
found in section 11.
It is recommended that Isolating valves are fitted in conjunction
with this product. These are not supplied.
Please refer to the diagrams in this section prior to installation.
Please plumb the valve in with the hot and cold going to the
correct sides as detailed in the diagrams below. If you have
plumbed it in the incorrectly already, the cartridge can be
reversed (see cartridge replacement section).

7
Exposed Installation:
1. Make sure the pipes are at the correct centres as shown above.
2. Secure the valve to the wall using the screws provided. Be careful
not to damage the screws or the valve in the process.
3. Flush the pipework before connecting the valve. Debris can
prevent the valve working correctly.
4. Connect the pipework using the compression fittings provided.
Check for leaks.
5. The water outlet side can be changed if required.
6. Calibrate and commission the valve as advised.
Note: Please make sure the inlet pipework is plumbed entering the
valve on the correct sides. If the pipes are plumbed the wrong way
around the cartridge can be taken out, turned 180° and replaced. This
prevents the need for the pipework to be changed.

8
Concealed Installation:
A.
B.
C.

9
1. Make sure the pipes are at the correct centres. A cavity is required
within the depth shown on the diagram. The depth depends on
how far you want the valve protruding from the finished surface.
The dimension is from the finished surfaced.
2. Remove the handle from the valve and place all components in a
safe place (see section 8 for handle removal). You will need to fix
the valve to a fixing surface within the cavity and fasten the valve
with screws. Flush the pipes through before connecting the valve.
3. Connect the valve using the compression fittings. Connect the
required outlet. Check for leaks.
4. Tile up to the valve so that the Plate will cover the cavity. Do not
permanently fill the cavity in as this may be required for access
at a later date.
5. Place the plate over the valve collar and push flush to the wall.
Seal around the plate to prevent water entering the cavity.
Replace the handle.
6. Calibrate the valve and commission as advised (see section 8 and
11).

10
7. 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.

11
8. CALIBRATION
Step 1:
Step 2:
Step 3:
Spindle
2
1
Brass Stop Ring
PLEASE NOTE THAT ALL VALVES MUST BE CALIBRATED ON SITE
BEFORE THEY ARE USED BY THE END USER. VALVES HAVE BEEN
FACTORY SET UNDER LABORATORY CONDITIONS WHICH MAY NOT
BE REPLICATED ON SITE.
With the spindle screw removed
place a small flat bladed screw
driver into the spindle. Locate the
screw slot inside and turn
anticlockwise to increase the
temperature or clockwise to reduce
it. Allow the valve to stabilise and
measure the outlet temperature.
BRASS STOP
RING BLADE
CARTRIDGE
STOP LUG
SPINDLE
Turn the handle clockwise until it
stops in the off position.
Remove the cap and undo the
screw. Remove the screw and
washer. Put these in a safe place.
The handle can now be removed.
When the handle is removed the Brass
Stop Ring will be revealed. This should
be tight against the Stop Lug in the Off
position. There should be no flow of
water.
If there is a flow of water please go to
Step 3.
In order to stop the flow of water the
Brass stop Ring position must be reset.
To do this, remove the M4 grub screw
holding the Brass Stop Ring in position.
Then remove the Brass stop Ring.
Stop lug

12
Step 4:
Step 5:
Step 6:
Place the Brass Stop Ring back on the
spindle one serration anticlockwise of the
Stop Ring. Turn the Brass Stop Ring
clockwise until it reaches the Stop Lug. If
the water still has not shut off repeat the
step until it does.
When the water stops the Off position
has been set and the grub screw can be
replaced.
The water should now have stopped coming
from the outlet. This means the Off position
has been set and the max hot temperature
can be set.
Turn the Bras Stop Ring fully anticlockwise
until it reached the other side of the Stop
Lug. This is the fully on position and the
water from the outlet should be at a
maximum of 43 °C. If it is please go to step 9.
If not, proceed to step 6.
If the water is not the correct
temperature, please use a small screw
driver to remove the spindle sealing screw.
This is located inside the spindle hole.
Please note: A small amount of water
may come from inside the spindle hole
when the spindle sealing screw is
removed. This is normal.
Spindle Sealing Screw

13
Step 7:
Step 8:
Step 9:
The valve is now calibrated and is ready for commissioning and
handover. Remember to leave this instruction and installation booklet
with the end user.
Once the stabilised outlet
temperature is correct replace the
spindle sealing screw.
Make sure the spindle screw is fully
screwed in place and no water is
coming from the spindle hole.
The handle can now be replaced
and secured using the screw and
washer. The indices can then be
replaced. Check for leaks.
If a lever handle is being used
please ensure that the lever is in
the correct position.
In order to calibrate the valve to the correct
outlet temperature please place a 3mm flat
bladed screw driver into the spindle. Locate
the calibration screw slot inside and turn
anticlockwise to increase the temperature or
clockwise to reduce it. Allow the valve to
stabilise after every adjustment and measure
the outlet temperature.

14
9. CARTRIDGE REPLACEMENT
Step 1:
Step 2:
Step 3:
2
NB - Please make sure the valve is
isolated from the water supply
before replacing a cartridge.
When the valve has been isolated,
turn on the valve to let any water
in the pipework escape.
Remove the handle cap and undo
the screw. Remove the screw and
washer. Put these in a safe place
Please remove the M4 grub screw
from the Brass Stop Ring. The Brass
stop Ring can then be removed.
Keep the grub screw and the
Stop Ring as they will be required to
calibrate the new cartridge.
In order to remove the Chrome
Retaining Collar you must remove
the M5 grub screw that holds it. This
is positioned at the underside of the
body.
The retaining collar can then be
taken off by placing a spanner on the
flats and turning anti-clockwise.
1
Brass Stop Ring
Retaining Collar

15
Step 4:
Step 5:
Step 6:
AT THIS STAGE, THE VALVE NEEDS TO BE CALIBRATED. PLEASE GO TO
THE CALIBRATION INSTRUCTION IN SECTION 8.
Lug
Pull the cartridge from the valve body.
There will be some residual water in the
pipework that will pour out when the
cartridge is removed.
Place the new cartridge in the valve as
in the diagram.
Note: It is very important to replace
the cartridge correctly. The lug must
be positioned in the correct slot. The
hot and cold markings on the
cartridge must align with the hot and
cold inlets.
If the Valve Body has been plumbed
the wrong way around the cartridge
can be turned 180° to match.
Tighten the chrome retaining collar by turning it
clockwise. Tighten the collar to 17 Nm and then
replace the grub screw to ensure the collar does not
come loose.
Please ensure that the Cartridge Lug (mentioned
above) does not come out of the slot when tightening
down the Retaining Collar.
Reinstate the water supply to the valve and check for
leaks.
Slot

16
10. FAULT DIAGNOSIS
Fault
Possible Cause
No hot water
from the Valve
1. Check the hot water supply temperature from the
boiler.
2. Inlets are reversed; cartridge needs to be turned 180°.
3. Calibration is incorrect. See section 8.
4. Operating conditions are incorrect. See section 11.
5. Blockage in system.
No cold water
from the Valve
1. Inlets are reversed; cartridge needs to be turned 180°.
2. Operating Conditions are incorrect. See section 11.
3. Blockage in the system.
No or low flow
from the Valve
1. Possible blockage in the system.
2. Operating Conditions are incorrect. See section 11.
3. Automatic Shut Off has been activated due to water
supply conditions (See section 11). Either hot/cold
water supply has failed.
Mixed water is
too hot
1. Calibration is incorrect. See section 8 in order to change
to a desired temperature. Refer to section 11 for the
maximum water temperature.
Flow from Valve
in the off
position
1. The shut off position is incorrect. See section 8.
2. Debris blocking shut off.
3. Hot seat is damaged.
4. Cold shut off O ring is damaged.
Leak from
Spindle
1. The Spindle Sealing Screw is not screwed in far enough
or not screwed in at all. See section 8.
Leak from Body
1. Retaining Collar is not tightened properly.
2. Cartridge O rings need to be replaced.
Mixed
Temperature
fluctuating
1. Hot supply temperature fluctuating (see section 11).
2. Supply pressure is fluctuating (see section 11).
3. Thermostat arrangement is faulty.

17
11. CONDITIONS OF USE
Key: High Pressure (HP)
Low Pressure (LP)
Table 1: Normal Conditions of use.
Supply Conditions
High Pressure
Low Pressure
Maximum Static Pressure (bar)
10
10
Flow Pressure Hot & Cold (bar)
1-5
0.2 - 1
Hot Supply Temperature (°C)
52 -65
52 - 65
Cold Supply Temperature(°C)
5 - 20
5 - 20
Minimum Temperature Differential (°C)
10
10
Table 2: Recommended Mixed Water Temperature
Application
Recommended Max Hot Water Temperature °C
Shower
41

18
b) COMMISSIONING
Method for Commissioning Thermostatic Mixing Valves
Purpose
Since the installed supply conditions are likely to be different from those
applied in the laboratory tests it is appropriate, at commissioning, to carry
out some simple checks and tests on each mixing valve to provide a
performance reference point for future in-service tests.
Procedure
Check that:
a) The designation of the thermostatic mixing valve matches the intended
application.
b) The supply pressures are within the range of operating pressures for the
designation of the valve.
c) The supply temperatures are within the range permitted for the
valve and by guidance information on the prevention of legionella etc.
Adjust the temperature of the mixed water in accordance with the
manufacturer’s instructions and the requirement of the application and
then carry out the following sequence:
a) Record the temperature of the hot and cold water supplies.
b) Record the temperature of the mixed water at the largest draw-off flow
rate.
c) Record the temperature of the mixed water at a smaller draw off flow
rate, which shall be measured.
d) Isolate the cold water supply to the mixing valve and monitor the
mixed water temperature.
e) Record the maximum temperature achieved as a result of (d) and the final
stabilised temperature.
NOTE: The final stabilised mixed water temperature should not exceed the
values in Table 3.
f) Record the equipment, thermometer etc. used for the measurements.