Inta Nulo CB10032CP User manual
Nulo and Nulo Deluxe
Safe-touch Shower Mixing Val e
CB10032CP & CB10036CP
Installation and Maintenance Instructions
In this procedure document we ha e endea oured to make the
information as accurate as possible.
We cannot accept any responsibility should it be found that in
any respect the information is inaccurate or incomplete or
becomes so as a result of further de elopments or otherwise.
Intatec Ltd
Airfield Industrial Estate
Hixon
Staffordshire
ST18 0PF
Tel: 01889 272 180
Fax: 01889 272 181
email: [email protected]
web: www.intatec.co.uk
© Intatec Ltd 2017
© Intatec Ltd 2017 1
Introduction
This installation guide has been produced for the Nulo shower mixing valve. These instructions
cover the installation, operation and maintenance. Please read the enclosed instructions before
commencing the installation of this product, please note;
We recommend that the installation of any Inta product is carried out
by an approved installer.
The installation must be carried out strictly in accordance with the Water Supply (Water Fitting)
Regulations 1999 and any local authority regulations.
If in doubt we recommend that you contact WRAS - Water Regulations Advisory Scheme on
Tel: 0333 207 9030, your local water authority - details available on the WRAS website or
the Chartered Institute of Plumbing and Heating Engineers on Tel: 01708 472 791.
All products MUST be re-commissioned to suit site conditions to ensure optimum performance
levels of the product are obtained
Safety
This thermostatic shower must be installed and commissioned correctly to ensure that water is
supplied at a safe temperature to suit the users.
The shower is pre-set using ideal conditions to 38°C at the stop with a manual push button
override to 46°C (can be re-set to suit site conditions or user preference – see calibration
page 7).
The maximum mixed temperature takes account of the allowable tolerances inherent in
thermostatic shower mixers and temperature losses.
It is not a safe bathing temperature for adults or children.
The British Burns Association recommends 37 to 37.5˚C as a comfortable bathing
temperature for children. In premises covered by the Care Standard Act 2000, the maximum
mixed water outlet temperature is 43˚C.
Products
Nulo Thermostatic Bar Shower with Telescopic Riser, verhead
Soaker and Handset. CB10032CP
Nulo Deluxe Safe Touch Thermostatic Bar Shower with Riser, Large
Stainless Steel Soaker, Push Button Handset and Smooth Hose CB10036CP
Nulo Thermostatic Bar Shower - valve only ED10046CP
Check Content
Before commencing remove all components from packaging and check each component with
the contents list.
Ensure all parts are present, before discarding any packaging. If any parts are missing, do not
attempt to install your Inta shower valve until the missing parts have been obtained.
© Intatec Ltd 2017 2
Technical Data
The Nulo thermostatic shower valve is suitable for installations on all types of plumbing
systems, including gravity supplies, fully pumped, modulating combination boiler, unvented
water heater and unbalanced supplies i.e. Cold Mains & Tank Fed Hot. They are not suitable
for non-modulating combination boilers.
Max Inlet Pressure (Static) 10 bar Max Inlet Temperature 85˚C
Max Inlet Pressure (Dynamic) 5 bar Pre Set Factory Temp Setting 38˚C
Min perating Pressure (Dynamic) 0.4 bar Temperature Stability ±2˚C
Max Unbalanced Pressure Ratio 5:1 Min Temp Differential to
Inlet Connections (Body only) G¾” ensure fail-safe between hot
utlet Connection Bottom G½” and cold supplies 10˚C
Item Qty Component Item Qty Component
1 1 Body 72Circlip
2 2 Wall brackets 82Filter
3 2 live 92Check valve
4 2 Compression face 10 2 Connector
5 2 Concealing plate 11 2 Union nut
6 2 Sealing washer 12 2 ‘ ’ ring seal
Components
11 12
235
6
7910
1
4
8
© Intatec Ltd 2017 3
nvented Mains Pressure System
The drawing shows a typical installation of a
shower mixing valve in conjunction with an
unvented hot water system. This type of
installation must be carried out in accordance
with Part G of the Building Regulations.
Whilst pressures are theoretically equal
(balanced) most unvented hot systems have a
pressure reducing valve on the incoming cold
water prior to the hot water storage vessel.
This means that the hot and cold pressures can
be significantly different.
Most unvented systems use an inlet manifold
located directly after the pressure reducing
valve.
It is recommended that the cold supply be taken
from one of the outlets of the manifold directly to the shower as an independent supply.
For systems without a manifold unit after the pressure reducing valve and where the cold water
supply pressure is significantly higher than the hot supply we recommend that a separate
pressure reducing valve is fitted to the cold supply, as close as possible to the shower valve
and with no draw off points between it and the shower valve.
Flow regulators are required for installations where a PRV is not fitted to ensure simultaneous
demand is accounted for.
Modulating Combi Boiler / Instantaneous Gas Water Heater
The drawing shows a typical installation of a shower valve in conjunction with a combination
boiler.
Combi boilers will produce a constant flow of water at a
temperature within its operating range.
The hot water flow rates are dependant upon the type of
boiler / heater used and the temperature rise required
to heat the cold water to the required temperature.
The cold water flow rates may be much greater as they
are generally unrestricted from the mains cold water
supply. To ensure relatively balanced flow rates, we
recommend that a pressure reducing valve or 6 l/min
flow regulator is fitted in the cold water supply pipe.
Manifold
PRV
PRV if
manifold is
not used
Cold Supply direct
from mains
© Intatec Ltd 2017 4
Pumped Systems
Pumped systems use a booster pump to increase the
pressure of the gravity fed water supplies.
These booster pumps are used where the head of
water is insufficient to provide a satisfactory shower
or where a high performance shower is required.
Please ensure that the performance of the pump is
matched to suit the shower.
Follow the instructions for gravity fed installations
taking into account the installation requirements of
the pump.
Ensure that the hot and cold water storage capacity
is sufficient to supply the shower and any other
draw off points that may be used simultaneously.
Most pumps require a minimum head of water to
allow the flow switches to operate automatically.
Where this is not available a ne ative head kit
may be required to operate the pump.
Please consult the pump manufacturer’s installation requirements
Gravity System
The drawing shows a typical installation of a
shower valve on a gravity supplied system.
Please note the minimum head pressure required
to ensure correct operation of the valve. In
accordance with good plumbing practice, we
recommend that a totally independent hot and
cold water supply be taken to the valve.
The cold water supply must be connected directly
to the water cistern. The hot water supply should
be connected to the hot water cylinder via an
Essex flange or Sussex flange or to the vent or a
draw off pipe as close as possible to the top of
the cylinder.
For equal tank fed pressures there is no need to
fit the flow regulators. This installation is the
recommended minimum for gravity supplies. For
systems with less than 4 metre head pressure,
we recommend that a suitable booster pump is
fitted to increase the supply pressure.
Cold Supply direct
from mains
Pumps
Option shown
for mains
pressure cold
& low pressure
hot water
Min. 4m head
© Intatec Ltd 2017 5
Gravity System
Cold Mains & Gravity Hot Supplies
If the cold supply to the shower is direct from the cold water mains and the hot water supply is
gravity fed from the cold water cistern via the hot water cistern you MUST fit a pressure
reducing valve or a 6 l/min flow regulator.
Site Preparation
It is important to plan the installation thoroughly to suit site conditions before
commencing.
• Before commencing the installation ensure site conditions are suitable.
• The shower mixing valve is designed for concealed pipework, whether in a solid or studded
wall with the supply pipes coming from below, above, the side or through the wall.
• The thickness of wall tiles, plaster or plaster board should all be considered when routing the
hot and cold supply pipes.
• The valve requires the supply pipes and wall brackets to have 150mm centres and sufficient
copper pipe must protrude from the finished tiled surface to allow a water tight compression
joint to be made.
• Ensure the shower valve will be horizontal when installed.
• The supply pipes if not embedded into the wall with plaster the should be fixed securely
to the studding.
• The whole system should be thoroughly flushed, prior to the connection of the hot and cold
water supplies to the bath-shower mixing valve, to remove any debris that may be in the
supply pipework.
• Ensure there are no joint leaks before finishing the wall.
• Isolation valves must be fitted in an accessible position to both the hot and cold supplies
should the valve need to be isolated in the future for servicing.
150 Ctrs
© Intatec Ltd 2017 6
Fitting the Brackets
• Apply silicone sealer to the back of both wall brackets, fit to the 2 protruding copper pipes,
press to the wall and secure both brackets with 2 counter sunk screws.
• Add the olives and then the compression faces and tighten until water tight joints are made.
• Apply a bead of silicone sealer around the inside edge of the concealing plates, position
over the compression faces and press firmly to the wall.
Installing the Shower Valve
• The connector (10), check valve (9), filter (8), sealing washer (6) and union nut (11)
assemblies are factory fitted to the shower valve.
• Fit the shower valve to the wall bracket assemblies using the sealing washers (6) and using a
suitably sized spanned, tighten the union nuts taking care not to damage the finish on the
shower valve, do not over tighten.
• Turn on the water supplies and check that all joints are water tight.
© Intatec Ltd 2017 7
Calibration
The Nulo shower valve has a factory set outlet temperature of 38˚C via the security setting.
This is based on a balanced supply pressure and a stable hot water inlet temperature of 65˚C.
However, the calibration point MUST be checked and re-set as necessary to suit site conditions.
Care must be taken when re-calibrating the valve as INCORRECT CALIBRATION CAN CAUSE
INJURY.
• Remove the cover cap (2), the retaining screw (3), spring washer (4), brass spacer (5),
temperature control knob (6), the control knob bush (8) and the temperature stop ring (10)
paying attention to the position before removal.
• Fully open the flow control (1) and allow the outlet temperature to stabilise from the bottom
outlet.
• Temporarily refit the control knob bush (8) and control knob (6) and using a digital thermometer
it is possible to increase or reduce the mixed water outlet temperature until 38˚C is
re-established, by slowly rotating the control knob.
• Remove the control knob bush (8) and control knob (6) and refit the temperature stop ring (10)
onto the splined section of the cartridge when 38˚C is achieved. Refit the temperature stop ring
as per the position before removal.
• Refit the temperature control knob in the reverse order ensuring that 38˚C on the shower body
is in line with the security setting of the control knob.
PLEASE NOTE THAT ONCE CALIBRATED, THE SECURITY SETTING WILL ONLY BE 38˚C
UNDER THE SUPPLY CONDITIONS USED FOR CALIBRATION.
1
9
10
11 2
3
4
5
6
7
8
© Intatec Ltd 2017 8
Cartridge Replacement
• Isolate both the hot and cold water supplies
• Remove the cover cap (2), the retaining screw (3), spring washer (4), brass spacer (5),
temperature control knob (6), the control knob bush (8) and the temperature stop ring (10)
paying attention to the position before removal.
• Remove the cartridge housing clip (9).
• Using a suitably sized spanner unscrew the cartridge (11) from the shower valve body.
• Replace with a new cartridge, the shower valve must be re-calibrated after fitting the new
cartridge following the procedure on page 7.
• Re-assemble the control knob assembly in the reverse order.
• Re-check the calibration temperature from the shower valve outlet.
Aftercare
Inta shower mixing valves have a high quality finish and should be treated with care.
An occasional wipe with a mild washing-up liquid on a soft damp cloth followed by a
thorough rinsing is all that is required.
The nozzles in the hand set or overhead soaker should be cleaned periodically to remove any
build up of debris or deposits which may affect the performance of the shower.
Do not use an abrasive or chemical household cleaner as this may cause damage.
Servicing
The Inta shower valve is designed to provide a high level of thermal performance to ensure the
life cycle is as long as possible;
Valves should be serviced annually which should include the following:
1 Cleaning the independent inlet strainers - the filter element.
2 Cleaning the thermostatic cartridge filters - the complete cartridge must be removed for
cleaning.
Spares
A full range of spares are available for this product.
PLEASE NOTE: nly genuine spares should be used.
© Intatec Ltd 2017 9
Fault Solution
Showering temperature is not hot enough. Ensure the hot water supply is at a constant
temperature above 60˚C.
Check for air locks in the pipework.
Thermostatic cartridge movement limited
due to lime scale build up
The water goes cold during showering. Insufficient stored hot water.
When used with a combi boiler confirm
that the boiler is still firing.
Adjust the boiler to a minimum setting of
65˚C which may not necessarily be the
best flow rate.
When the water is set at cold, the
showering temperature is too hot.
The hot and cold supply connections have
been made in reverse.
Thermostatic cartridge movement limited
due to lime scale build up
The maximum showering temperature is
too hot or when set to hot water runs to
cold.
Check the commissioned maximum
temperature of the shower valve.
Check the connections to the valve have
not been made in reverse.
Thermostatic cartridge movement limited
due to lime scale build up
The flow of water from the shower valve is
low.
Check the filters are clean and the supply
pressure is above 0.4 bar.
No flow of water Ensure the valve has not fail-safed and
check that there is hot and cold water flow
to the valve.
Ensure the check valves are not closed.
Shower is stiff to operate Build-up of limescale on flow control
cartridge - service and de-scale
Passing/dripping from outlet Service flow control cartridge.
Problem Solving
The following details are supplied for on site queries, should you require any further assistance
our Technical Department can be contacted directly on 01889 272199.
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