TMV3 APPROVAL

INFORMATION TO BE INCLUDED WITHIN THE INFORMATION AND MAINTENANCE DOCUMENTATION.

The Secretary of the Scheme has prepared this list after consultation with the members of Technical Assessment Panel and with the approval off the members of the Thermostatic Mixing Valve Scheme.

1) Information upon the designation of use i.e.HP-T46, LP-S etc.

2) Information upon the commissioning of the valve

This will include: -

a) Operating pressures for the valve (Table 1).

b) The water supply temperatures for the valve (Table 1).

c) Method of adjusting the mixed water temperature.

d) Method for commissioning the valve.

e) Mixed water temperature (Table 2 without Notes).

f) Method for performing the In-service tests.

To facilitate the information required in 2) a) b) and e) and to present the information in a standardized fashion, the relevant information contained in tables 1 and 2 in the NHS document D 08 is to be included in a tabular format within the I & M documentation.

3) Information upon the frequency of in-service tests and service work.

4) Information on the Backflow prevention devices that will be fitted, including the specification of the Backflow preventer, i.e. size, type and position (in-body/ handset/ hose/ tail/ servicing valve). If the Backflow preventer is not supplied as part of the package then details of the type of device to be used are to be specified

5) Position of isolating valves if provided, if not provided the need for isolation valves and their position when fitted.

6) Position of strainers if provided, if not provided their position if fitted at the time of installation.

7) Inclusion of temperature differential characteristics of the valve.

It was agreed that these requirements for the I&M documentation be implemented by either the next re-print of the I&M document or the Schemes next audit of the valve whichever is the sooner, (unconfirmed minutes TMV 00.62.05, Sept 2002).