In-Service Tests - Grohe Automatic 2000 Bedienungsanleitung

950081.book : i95008gb.fm Seite 5 Donnerstag, Januar 21, 1999 10:18 AM
Re: Installation & Operating instructions
TMV Licence No. ETC/29/0997
The product must be installed with a Wrc listed and
approved check valve (ie.Neoperal).
The product must be installed with isolating valves for
maintenance and in-service testing.
Before commissioning, Grohe recommends simulating at
least 12 alternate hot and cold water failures before final
adjustment of the mixed water set temperature.
No maintenance other than cleaning the filters should be
carried out on this product.
1. Commissioning and in-service tests
1.1 Commissioning
1.1.1 Purpose
Since the installed supply conditions are likely to be
different from those applied in the laboratory tests it is
appropriate, at commissioning, to carry out some simple
checks and test on each mixing valve to provide a
performance reference point for future in-service test.
1.1.2 Procedure
1.1.2.1 Check that:
a) the designation of the thermostatic mixing valve
matches the intended application.
b) the supply pressures are within the range of
operating pressures for the designation of the
valve.
c) the supply temperatures are within the range
permitted for the valve and by guidance
information on the prevention of legionella etc.
1.1.2.2 Adjust the temperature of the mixed water in
accordance with the manufacturer's instructions
41°C maximum for shower and wash basin and
the requirement of the application and then carry
out the following sequence.
a) record the temperature of the hot and cold water
supplies.
b) record the temperature of the mixed water at the
largest draw-off flow rate.
c) record the temperature of the mixed water at a
smaller draw-off flow rate, which shall be
measured.
d) isolate the cold water supply to the mixing valve
and monitor the mixed water temperature.
e) record the maximum temperature achieved as a
result of (d) and the final temperature. NOTE. The
final mixed water temperature should not exceed
the values in Table 1, and any higher temperature
should occur only briefly.
f) record the equipment, thermostater etc. used for
the measurements.
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Table 1:Guide to maximum continuous temperatures
during site tests.
Application
Shower
Washbasin
1.2

In-service tests

1.2.1 Purpose
The purpose of in-service tests is to regularly monitor and
record the performance of the thermostatic mixing valve.
Deterioration in performance can indicate the need for
service work on the valve and/or the water supplies.
1.2.2 Procedure
1.2.2.1 Carry out the procedure 1.1.2.2 (a) to ( c) using
the same measuring equipment, or equipment to
the same specification.
1.2.2.2 If the mixed water temperature has changed
significantly from the previous test results (e.g. >
1K) 5), record the change and before re-adjusting
water temperature check
a) that any in-line or integral strainers are clean.
b) any in-line or integral check valves or other anti-
backsiphonage devices are in good working
order.
c) any isolating valves are fully open.
1.2.2.3 With an acceptable mixed water temperature,
complete the procedure 1.1.2.2(a) to (f)
1.2.2.4 If at step 1.1.2.2 (e) the final mixed water
temperature is greater than the values in Table 1
and/or the maximum temperature exceeds the
corresponding value from the previous test
results by more than about 2 K, the need for
service work is indicated.
NOTE:
In-service tests should be carried out with a frequency
which identifies a need for service work before an unsafe
water temperature can result. In the absence of any other
instruction or guidance, the procedure described in Annex
F may be used.
Mixed water
temperature °C
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