HORNE T105A Installation, Operating And Maintenance Instructions

HORNE T105A/106A/107A/108A THERMOSTATIC SHOWER PANEL
INSTALLATION, OPERATING & MAINTENANCE INSTRUCTIONS
Note that these instructions feature the T108A shower panel. The T105A, T106A and T107A feature the
same TSV1-3 thermostatic valve but differ in the water outlet fittings. All comments relating to the T108A
also apply to the other shower panels mentioned above and their variants.
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
LP-SE
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 the TSV1-3 panel is fed by supplies with differing pressures, use the following to determine
whether a pressure-reducing valve (PRV) is required on the side with the higher pressure. Note that
output flow-rate is always determined by the lower of the two inlet pressures. If the lower inlet pressure is
low enough (typically 0.2 to 1Bar dynamic) that the flow-regulator in the outlet fitting (see pages 11,12,13)
can be removed, then a PRV should not be required. If the lower of the 2 supply pressures is higher than
around 1Bar, then a flow-regulator will be required to restrict flow. If the flow-regulator is needed, and the
supply pressures are substantially unbalanced, then a PRV will also be needed to prevent pulsing of the
flow. Although thermostatic performance is unaffected by this, the flow pulsing is undesirable.
Maximum Static Pressure
Flow Pressure, Hot & Cold
Hot Water Supply Temperature
Cold Water Supply Temperature
Minimum Temperature Differential
(Hot – Mixed, Mixed – Cold)
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 at the factory with 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.
Issue 7, November 2018
Horne Engineering Ltd
FOR SURFACE MOUNTING WITH DUAL CONTROLS
Shower with supply pressures of 1 – 5 bar and unrestricted flow rate
Shower with supply pressures of 0.2 – 1 bar and unrestricted flow rate
High Pressure
10 bar
1 to 5 bar
52 – 65C
5 – 20C
5K
(K = degrees C)
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
Low Pressure
10 bar
0.2 – 1 bar
52 – 65C
5 – 20C
5K
(K = degrees C)
1