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MT04-001 AquariTherm Tap (Manual)
www.dartvalley.co.uk
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MT04-001 AquariTherm Tap (Manual)
www.dartvalley.co.uk
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on N
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Step 4 :
Preparation and Drilling
Step 3 :
Introduction
The tap incorporates a thermoregulating cartridge to ensure users
of consistent water temperatures.
The tap is suitable, without modification, for all types of installation,
including pump boosted systems and mains pressure.
The valve has been designed and manufactured to comply with
NHS D08 requirements for washbasin applications up to 41ºC high
and high pressure designations.
The valve has been independently tested and approved as a Type 3
valve under the TMV3 scheme with the HP-WE designation of use.
Table 1: Technical Specification / Condition of Use for
Type 3 valves
Table 2: Mixed Water Temperature Approvals
NOTE:
For washbasins, washing under running water
is assumed. The fitting of isolation valves is required as
close as is practicable to the water supply inlets of the
AquariTherm. Non-return valves and strainers are fitted
internally- see fig.13.
NOTE:
Balanced pressures are desirable, but must be
maintained within the ranges above.
Maximum Static Pressure
10 Bar
Dynamic Pressure
1 to 5 Bar
Hot Supply Temperature
55-65 ºC
Cold Supply Temperature
5-20 ºC
Minimum Temperature Differential (Mix to Hot)
for Fail-Safe
10 ºC
Temperature Stability
+/- 2 ºC
Code
HP-WE
Application
Washbasin
Mixed Water Temperature (at point of
discharge)
41 ºC
Operating Pressure
High Pressure (1-5
Bar)
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 outlet. If there is a flow stream
after 5 seconds then collect any water discharging into a
suitably graduated measuring vessel for 60 seconds; if the
volume of water collected is greater than 120ml then further
investigation is needed.
e) If there is no flow or the volume of water collected is less
than or equal to 120ml, then restore the cold water supply;
after 15 seconds, record the mixed water temperature.
f) record the equipment, thermometer etc. used for the
measurements
Table 3: Guide to maximum stabilised temperatures
recorded during site tests
Step 12 :
In-Service Testing
11.1 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 tests on
each mixing valve to provide a performance reference point for
future in-service tests.
11.2 Procedure
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.
Adjust the temperature of the mixed water in accordance with
the manufacturer’s instructions 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
Step 11 :
Method for Commisioning Thermostatic Cartridge
NOTE:
The final stabilised mixed water temperature should
not exceed the values in Table 3
Application
Mixed Water Temperature
Washbasin
41 ºC
7
We recommend the fitting of local hot & cold full flow isolation
valves prior to the tap if not already fitted.
Turn off hot & cold water supply. Cut pipework using a suitable
plumbers cutting tool, remove any sharp edges, locate isolation
valves on to pipes and tighten, make sure the new valves are in
the off position then turn the water back on, test for any leaks.
Using a bucket open each valve individually and purge water
through into the bucket this will remove any dirt left in the
pipework.
Refer to current HTM guidelines for tap positioning information,
also ensure adequate access is given under the Spigot to
operate integrated isolation valves.
Mark and drill a 50mm diameter hole in the wall panel where
the tap is to be located and a 4.5mm hole for the anti-rotation
pin (Fig. 1).
IMPORTANT:
The tap is supplied with an anti-rotation pin.
Failure to fit the pin will result in void of warranty.
Fig 1
IMPORTANT:
Plumbing compound should not be used to
seal the pipework as oils leaching from the compound will
prevent the TMV from functioning correctly.
12.1 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.
12.2 Procedure
Using the same measuring equipment or equipment to the same
specification as used in the commissioning of the valve, adjust
the temperature of the mixed water in accordance with the
manufacturer’s instructions and the requirement of the application.
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
flowrate, which shall be measured.
If the mixed water temperature has changed significantly from the
previous test results (e.g.>1 K) 5), record the change and before
re-adjusting the mixed water temperature check:
a) that any in-line or integral strainers are clean.
b) any in-line or integral check valves or other anti-back siphonage
devices are in good working order.
c) any isolating valves are fully open.
With an acceptable mixed water temperature, complete the
following procedure:
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 stabilised temperature.
f) record the equipment, thermometer etc. used for the
measurements.
If at step (e) the final mixed water temperature is greater than the
values in Table 1
(Step 3)
and / or the maximum temperature
exceeds the corresponding value from the previous 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 Fof D 08 may be
used - Annex F of D 08 (informative)
