Horne Engineering Ltd
Issue 7, November 2018
5
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.
Backflow Prevention
The hot and cold inlets to the TSV1-3 valve are fitted with single in-line WRAS Approved DN15 Check
Valves.
Supplementary Installation Instructions for T10XB Variants.
TSV1 Panel Mounted Shower Valves are available in versions with flexible braided stainless steel inlet
hoses rather than top entry isolating valves. The hoses used are PEX (cross-linked polyethylene). They
are not EPDM lined. These versions have Product Reference codes with the suffix
B
, e.g.
T108B
.
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
It is essential to commission the valve in order to establish a reference point for future in-service tests.
Ensure that the pipework has been flushed out before commissioning the TSV1-3. (See installation
instructions.)
Ensure that the NHS designation of the valve matches the intended application, 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, and within guidance information on the prevention of
legionella, etc.
NB Ensure that the servicing valves are also open
(see Para 8).
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.