Type 2 And Type 3 Valves; Application; Commissioning - Mira Select Flex Installation And User Manual

tyPe 2 and tyPe 3 ValVeS

Application

the approved designations for Type 2 Valves
are as follows:
Models
Mira Select Flex
the permitted application details are:
operating
designation Pressure
range
high
hP-S
Pressure
low
lP-S
Pressure
the approved designations for Type 3 Valves
are as follows:
Models
Mira Select Flex
the permitted application details are:
operating
designation Pressure
range
high
hP-S
Pressure
low
lP-S
Pressure
† Mixed water temperature at discharge point.
Important! For tMV2 installations the mixed
water temperature at the discharge point should
never exceed 46°c.
Note! For washbasins, it is assumed that you are
washing under running water.
Note! Bath fill temperatures of more than 44°C
should only be available when the bather is always
under the supervision of a competent person (e.g.
nurse or care assistant).
designation
hP-S, lP-S
Mixed
application Water
temp †
41°c
Shower
Max
41°c
Shower
Max
designation
hP-S, lP-S
Mixed
application Water
†
temp
41°c
Shower
Max
41°c
Shower
Max
in order to achieve the safe water temperatures
expected of type 2 and type 3 Valves it is
essential that the valve is used only for the
applications covered by its approved designations,
with the appropriate water supply pressures
and temperatures, and it is commissioned,
maintained and serviced in accordance with
the recommendations contained in this guide
(refer to the section 'Maintenance, In-Service
Tests' for in service test frequency that must be
used as a minimum guide in type 2 and type 3
installations).
Supply Conditions
For applications where a type 2 or type 3 Valve
is required, the supply conditions must comply
with the values extracted from the tMV2 and
TMV3 standard (EN1287 & EN1111), shown in the
table below. note that both hot and cold supply
pressures must lie within the same pressure
range.
operating Pressure
range
Maximum Static
Pressure (bar)
Maintained Pressure,
Hot and Cold (bar)
hot Supply
Temperature (°C)
cold Supply
Temperature (°C)
Valves operating outside these conditions cannot
be guaranteed to operate as type 2 or type 3
Valves.

Commissioning

(temperatures should always be recorded with a
thermometer with proven accuracy)
1. check that the designation of the thermostatic
m i x i n g v a l v e m a t c h e s t h e i n t e n d e d
application.
2. check that the supply pressures are within
the range of operating pressures for the
designation of the thermostatic mixing valve.
3. check that the supply temperatures are within
the range permitted for the shower control and
by guidance information on the prevention of
legionella etc.
4. check inlet pipework temperatures for correct
function of the non return valves.
23
high low
Pressure Pressure
10 10
1 to 5 0.2 to 1
55 to 65 55 to 65
≤25 ≤25