Horne Engineering Ltd 1

Horne Engineering Ltd
Horne Engineering Ltd
Po Box 7, Rankine Street
Johnstone, Renfrewshire
Scotland, PA5 8BD
Tel: 01505 321455
Fax: 01505 336287
Email: technical@horne.co.uk
Web: www.horne.co.uk
HORNE TSV1-A105A/A106A/A107A/A108A THERMOSTATIC SHOWER PANEL
FOR SURFACE MOUNTING WITH DUAL CONTROLS
INSTALLATION, OPERATING & MAINTENANCE INSTRUCTIONS
Note that these instructions feature the TSV1-A108A shower panel. The TSV1-A105A, TSV1-A106A and
TSV1-A107A feature the same TSV1-3 thermostatic valve but differ in the water outlet fittings. All
comments relating to the TSV1-A108A also apply to the other shower panels mentioned above.
Approvals
The TSV1-3 Thermostatic Shower valve has been independently tested by WRc-NSF and approved to all
the requirements of NHS Model Engineering Specifications D08 Thermostatic Mixing Valves (Healthcare
Premises) to the following designations and for the following applications:
HP-S
Shower with supply pressures of 1 – 5 bar and unrestricted flow rate
LP-S
Shower with supply pressures of 0.2 – 1 bar and unrestricted flow rate
Supply Water Pressure requirements
The minimum water pressure required to achieve a spray at the spray head is a dynamic head of 2m (3
psi, 0.2 bar) at the spray head. Note that for very low head installations, both hot and cold water supplies
must be at the same pressure.
Note that dynamic head is measured with the water running.
Where one supply is tank fed and the other pressurised, (e.g. cold mains and tank fed hot, or pressurised
hot and tank fed cold), a pressure reducing valve on the higher pressure side is not required provided that
the lower of the two pressures is equivalent to at least a 2m (3 psi, 0.2 bar) dynamic head at the spray
head.
The maximum recommended supply pressure is 6 bar (90 psi, 60m head) for hot and 10 bar (150 psi,
100m head) for the cold.
Supply Water Temperature Requirements
Max. Hot Water Temperature* 85°C
Min. Hot Water Temperature# 55°C
Max. Cold Water Temperature#
20°C
A minimum temperature differential of 5°C should exist between the mixed water temperature and each
inlet temperature.
Note that requirements marked * originate from WRAS approval of non metallic components, and those
marked # originate from HTM 04-01, 2007.
Temperature Adjustment Range
The mixed water temperature can be adjusted from cool through to a top limit (which can be preset during
installation – factory set to approx. 41°C - with full anti-scald protection throughout the range).
Water and Energy Conservation
The TSV1 range shower panels are fitted with flow restrictors or flow regulators at the shower outlet to
reduce the flow rate and conserve water and energy. The drawings at the end of this document provide
information for accessing the flow restrictors/regulators for removal or replacement.
Every HORNE TSV1-3 is supplied with an integral WRAS approved single check valve and integral large
surface area strainer. The Shower Panel terminates in 15mm copper pipes for hot and cold supplies. The
hot pipe is on the left, cold on the right, when viewed from the user’s perspective.
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Horne Engineering Ltd
INSTALLATION
The surface mounting enclosure is supplied with a fitting kit containing the necessary fixings to attach it to
the wall and with hex keys to assist with routine maintenance.
Installation of the pre-plumbed enclosure is particularly simple and involves mounting the enclosure on the
wall and connecting and flushing the water supplies.
1) Position the Pre-Plumbed Enclosure
Identify a suitable position for the Enclosure and mark a line on the wall level with the top of the
casing. Mark a point on the wall which is on the required centreline for the Casing 15mm below
the line of the top of the casing for the support screw (See Fig 1).
2) Install the Support Screw
Drill a 7.0mm dia hole in the wall and insert a wallplug and screw, leaving the head of the screw
11-13mm from the wall surface. Note that a stainless steel screw is supplied for this (corrosion
resistant).
3) Hang the Enclosure on the Support Screw
Release the top cover of the pre-plumbed enclosure by removing the four cross-head screws.
Hang the pre-plumbed enclosure on the support screw by the larger hole in the middle of the
back strap and let this take the weight of the enclosure. See Fig 2.
Fig 1
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Fig 2
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Horne Engineering Ltd
4) Mark out the 4 Support Holes
Ensure that the enclosure is hanging true and then mark out the holes for the 2 upper support
screws. Remove the bottom cover of the pre-plumbed enclosure and mark out the 2 lower support
screws (See Fig 3).
Fig. 3
5) Drill Support Holes
Carefully remove the pre-plumbed enclosure from the temporary support screw and, being careful
not to scratch the enclosure or its covers, lay it down where it will not be damaged. Drill 4 x 7.0mm
holes and install the wall plugs.
6) Attach the Pre-Plumbed Enclosure to the Wall
Carefully re-hang the pre-plumbed enclosure on the temporary screw. Put the four supplied screw
bushes in the mounting holes in the panel and then attach the panel firmly to the wall by the four
supplied stainless steel cross-head screws. A bead of silicon mastic can be used, if required, to
cover any gaps behind the panel on uneven walls. Do not mastic the lower End Cap to the wall.
See Fig 4.
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Horne Engineering Ltd
Fig 4.
7) Connect the Supply Pipes
N.B. Ensure that the top cover of the pre-plumbed enclosure is replaced prior to connecting up the
supply pipes.
Connect the hot water supply to the left hand inlet, and cold water to the right-hand inlet (See Fig 5).
DO NOT OPEN THE WATER SUPPLIES AT THIS STAGE AS THEY HAVE NOT BEEN FLUSHED
OUT TO REMOVE THE DEBRIS IN THE PIPEWORK. SUCH DEBRIS CAN DAMAGE THE TSV1-3
VALVE.
Fig 5.
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Horne Engineering Ltd
8) Flush the Pipework
Flush out the pipework in accordance with Water Bylaws 2000 (Scotland) and BS 6700: 1997
(England & Wales). The use of a Horne flushing kit is strongly recommended, because this
connects directly to the water inlets to the mixing valve. Access to the flushing points is gained
from underneath the casing through the lower end cap. Isolate the water supplies and also the
low level servicing valves located on the side of the panel (see Fig 6) using the supplied 4mm hex
key. Remove the strainer cap with the strainer basket and screw in the flushing adapter. Place
the end of the flushing hose in an appropriate drain or container and turn on the supply to flush as
required. After flushing, remove the flushing adapter and replace the strainer cap. Repeat for
both hot and cold supplies. See Figs 6 and 7.
NOTE THAT IF THERE IS ANY DANGER OF FREEZING THEN THE PIPES AND TSV1-3 MUST
BE DRAINED TO AVOID DAMAGE.
Fig 6.
Fig 7.
9) Test for Leaks in Pipework
Ensure that the TSV1-3 on/off control is closed (i.e. turned fully clockwise) and open the supplies.
Open the servicing valves on the TSV1 Casing (See Fig 6). Turn on the supplies and adjust the
temperature control and check for any water leaks upstream of the TSV1-3 valve. Make good any
leaks found. The valve is now ready for commissioning.
Note that if the controls, enclosure and shower accessories require cleaning then care must be taken
not the scratch them in the process. Wash off any surface dust with the shower spray before
cleaning with soapy water.
DO NOT USE ANY ABRASIVE CLEANERS OR SOLVENTS OR THE SURFACES MAY BE
DAMAGED.
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Horne Engineering Ltd
Supplementary Installation Instructions for TSV1-A10XAB Variants.
TSV1 Panel Mounted Shower Valves are available in versions with flexible braided stainless steel inlet
hoses rather than top entry isolating valves. These versions have Product Reference codes with the suffix
AB, e.g. TSV1-A108AB.
The main difference, from an installation point of view, is that the water supplies may have to be
connected before the pre-plumbed enclosure is attached to the wall.
Accordingly, point 7 on the attached installation instructions (Connect the Supply Pipes) should be
performed before point 6 (Attach the Pre-Plumbed Enclosure to the Wall) unless alternative access is
available to the connections, e.g. via an access panel.
Note that the braided hose inlets are colour coded with BLUE for the Cold Water Supply and RED for the
Hot Water Supply.
Care should be taken to ensure that the weight of the pre-plumbed enclosure is taken by the mounting
screws and NOT by the hoses.
COMMISSIONING
Ensure that the pipework has been flushed out before commissioning the TSV1-3.
See installation instructions.
Ensure that both hot and cold water supplies are open and at, or near, their design temperatures and
pressures and that they are within the requirements of the valve as outlined on page 1. The NHS
designation of the valve should match the intended application.
Set the temperature control to the maximum temperature setting (i.e. rotate the control anticlockwise until
it stops).
Fully open the on/off control by turning it anticlockwise. For installations with a fixed shower head, putting
a burst polythene bag over the shower head will help to catch and deflect the spray during commissioning.
Allow the shower to run at maximum temperature setting until the water temperature has stabilised.
Should the temperature rise, or drop, in an uncontrolled fashion, then the hot and cold supplies are
probably reversed. Correct this before proceeding.
The TSV1-3 is set in the factory to provide a maximum outlet temperature of approximately 41°C, but this
should be checked on site to ensure that the setting has not been altered and to ensure user safety.
If the maximum temperature requires adjustment, remove the temperature control cap using a sharp blade
or the tip of a penknife and adjust the small slotted screw in the centre of the spindle. Adjust the screw
anticlockwise to increase the temperature, clockwise to decrease the temperature. See Fig 8 below.
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Horne Engineering Ltd
Fig 8.
After setting the maximum temperature, turn the shower on and off a few times and check that the
maximum setting is correct. Record the commissioning information on the attached maintenance sheet to
permit the in-service performance of the valve to be assessed.
Finally, check the thermal shut-off facility of the TSV1-3 by performing a thermal shut off test. With the
shower running, close the cold (i.e. right hand) servicing valve. The Servicing Valve is closed when the
arrows are in the horizontal position, and open when they are in the vertical position. See Fig 6. The flow
from the shower head should immediately stop or reduce to a trickle, in which case the mixed water
temperature rise should be less than 2°C. In either case, there is no scalding risk. If the temperature rises
above this then it is likely that there is contamination in the TSV1-3 that is preventing it from shutting off
the hot supply. Refer to the maintenance section of this booklet or phone the factory for advice.
MAINTENANCE
Maintenance of the TSV1-3 shower valve is essential to ensure the product continues to perform to
specification after installation, and continues to afford scald protection. Record all maintenance carried out
on the attached commissioning and maintenance record.
When cleaning the external faceplates and knobs, never use cleaners containing abrasives or solvents as
they may damage the chrome plating. Use only a soft cloth and soap.
The frequency of routine maintenance of the TSV1-3 internals (i.e. cleaning, descaling etc) depends
largely on the condition of the water supplies, and local knowledge will dictate suitable intervals. In
addition to this the following precautions should be observed.
Initially check the strainer baskets for debris every three months and clean if required. This period can be
increased if appropriate once the general condition and cleanliness of the water is established.
Perform a thermal shut-off test every three months, and check the maximum temperature setting. See the
last paragraph in the Commissioning Instructions for details of the thermal shut-off test and re-adjustment
of the maximum temperature setting, if required.
If the maximum water temperature rises by more than 2°C from the commissioned setting then ensure that
the strainers are clean and that the isolating valves are fully open. Test the Check Valves as described
below. If these tests do not highlight the reason for the temperature rise then follow the procedure below
for investigating failure of the thermal shut-off test.
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Horne Engineering Ltd
If the TSV1-3 fails the thermal shut of test then remove the temperature control knob and the thermostatic
cover (see installation instructions for details) and check the internal surfaces for scaling. If the TSV1-3
body requires descaling then it should be removed from the casing to do this. All rubber parts must be
removed prior to descaling. Do not forget the Slide Valve Seal located inside the TSV1-3 body, which
should always be replaced with a new seal after removal. Maintenance kits are available which contain
“O” rings and/or the Thermostatic Element. Smear all “O” rings with silicon grease/oil prior to installing
them. Torque the TSV1-3 cover to 13 Nm (10 lbft). This is to prevent the use from inadvertently
unscrewing the cover during temperature adjustment. Do not over tighten the cover.
Replace the “O” rings every three years (Maintenance kit with spare “O” rings available). Smear silicon
grease/oil on all “O” rings prior to installation. Lightly smear the outside diameter of the slide valve with
silicon grease/oil prior to installation.
Replace the Thermostat Element and slide valve assembly at least once every 6 years in all TSV1-3
valves, or more often if problems are experienced or in installations where the water is aggressive.
The On/Off mechanism uses a ½ “ washer, which should be replaced when it leaks. Remove the cosmetic
trim and unscrew the on/off assembly. The washer is retained by a small nut. Do not over tighten this nut
(torque to 2.5 Nm). Ensure the on/off assembly is torqued down to 13 Nm (10 lbft) to prevent the use from
inadvertently unscrewing the assembly during flow control. Do not over tighten the assembly.
The Check Valves prevent crossflow between hot and cold water supplies under unequal pressure
conditions, and are designed for long life with no maintenance. Their function can be tested as follows:
To test the Check Valve on the hot side, shut off the hot supply and ensure the cold supply is open. Be
prepared for leakage of trapped water from the pipe and remove the strainer basket on the hot side. Any
continuing leakage evident from the strainer body is likely to be coming through the hot supply Check
Valve (N.B. Ensure the hot isolating valve shuts off tight, or it may cause leakage here).
To test the Check Valve on the cold side, shut off the cold supply and ensure the hot supply is open. Be
prepared for leakage of trapped water from the pipe and remove the strainer basket on the cold side. Any
continuing leakage evident from the strainer body is likely to be coming through the cold supply Check
Valve (N.B. Ensure cold isolating valve shuts off tight, or it may cause leakage here).
If either Check Valve is leaking then the inlet elbow (complete with Check Valve and strainer basket)
should be replaced. It is not possible to satisfactorily remove the Check Valve itself from the inlet elbow
and this should not be attempted. The shower valve body must be removed from the pre-plumbed
enclosure in order to remove the inlet elbows. See Fig 9 for the location of the parts.
Care should be taken not to lose any of the parts from the drive coupling on the servicing valve.
Fig 9.
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Horne Engineering Ltd
To remove the spray plates from the handset or fixed shower head, rotate the lock rings to 30 degrees
anticlockwise to release the bayonet fitting and then ease out the spray plates by the lock ring. Note that
for the fixed showerhead, a tool is supplied with the showerhead to engage the lock ring as shown in Fig
10.
Fig 10.
IN-SERVICE TESTING
Periodic testing should be carried out to check whether or not any deterioration has occurred in the
performance of the TSV1-3.
A thermal shut-off test, as described under maintenance above, should be carried out. If the mixed water
coming from the showerhead is at a temperature of more than 3°C above the maximum mixed water
temperature setting then the TSV1-3 is due for maintenance.
Note: A thermostatic mixing valve in need of maintenance can be undetectable in normal use and
only become apparent when disruption occurs in the hot or cold water supply temperatures or
pressures.
The frequency of in-service testing depends upon the condition of the water passing through the TSV1-3.
In-service testing must be carried out more frequently in hard water areas than in soft water areas. As a
general guide, in-service testing should be carried out at intervals somewhere between six months and 12
months. In-service testing should be carried out at least every 12 months and, where the water is hard,
the interval may be less than 6 months. Experience of local conditions and the in-service testing record
will dictate the frequency of in-service testing.
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Horne Engineering Ltd
COMMISSIONING, MAINTENANCE & IN-SERVICE TESTING RECORD
Establishment: …………………………………………………………………………………………..……..
Valve Type: Horne TSV1-3 Thermostatic Shower Valve
Valve Location: ……………………………………………………………….…………………………………
Date Installed: ……………
Installed by: .………………………………………………………………...
Commissioning Details
Hot Water Temp. ………..…....°C
Pressure ………..…..Bar
Equip. Used ………………
Cold Water Temp. ………........°C
Pressure …………....Bar
Equip. Used ………………
Max. Temp. Setting ………..…°C
C.W.Fail ...............°C (Max)
Replacement Dates:
“O” Ring Seals (recommended every 3 yrs) …………...……………….……
Thermostatic Element & Slide valve (every 6 years) ……………………
Inspection and Maintenance Record
Date
Mixed Temp.
Hot Temp.
Hot Press.
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Horne Engineering Ltd
Brochure Ref: L-189 (TSV1-A10XA)
Issue 2, October 2009
Horne Engineering Ltd
PO Box 7
Rankine Street
Johnstone
SCOTLAND
PA5 8BD
Tel: +44 (0)1505 321455
Fax: +44(0)1505 336287
Email: Technical@horne.co.uk
www.horne.co.uk
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