Armitage Shanks Markwik 21 - Page 14

14
∆t>5
ºC
is supply temperature
same as previous audit?
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
record stable state supply
temperature (5 - 20
C)
º
cold <20
in 2 minutes
ºC
supply pressures
are appropriate
hot>55
in 1 minute
ºC
record stable state supply
temperature (55 - 65
ºC)
is supply temperature
same as previous audit?
insignificant change
difference <5
C
∆t
º
>65
ºC
temporary change
of known cause
long term or permanent
change - consider
recommisioning of thermo
fitting(s)
implications to terminal fittings
investigate system issue
no action.
retest when
conditions normalise
no action
go to D-08 field test audit 9.4
or commissioning 9.2
follow
commissioning
instructions see
9.4 Audit procedure (see decision tree FC2)
• Verify the water supplies conditions are similar to when the product was commissioned i.e. inlet ∆t
as previous + / - 5C°
Note: If inlet ∆t change is > 5C consider the cause of the change, If it is seen as a long term or
permanent change, re-commission the product. If however, it is only a temporary change, retest when
normal conditions resume.
• If inlet ∆t differs from the commissioning ∆t by < 5C° carry out eld ‘cold water isolation’ (CWI) test
as D-08: 2009. See 9.5 in eld Cold Water Isolation test failure.
• Pass - restore the cold supply and move on to check the mix temperature.
Note: If the product fails CWI test, refer to 9.5 and then re-commission the valve.
• Mixed Temperature is as commissioned ±2C°, Accept and record the temperature.
Note: If mixed Deviation > ±2C° (1st instance) reset mix as instructions and redo the test from start.
See 12.1 Adjustment of the mix temperature.
• 2nd & subsequent instances follow maintenance instructions.
Audit of Supplies To Fittings (FC3)