Armitage Shanks Markwik 21 - Commissioning and Audits; Purpose of Commissioning; Commissioning Process; Audit Checks on TMVs

12
PROGRAMMING THE SENSOR CONTINUED
9 COMMISSIONING AND AUDITS
sensor
30 - 50 mm
Step 2 Run Time Adjustment
Figure 19
No of LED Flashes
1
2
3
4
5
6
7
8
9
Run Time (Seconds)
1
2
3.25
7.5
15
30
60
120
240
While the sensor LED is ashing, hold hand near
to sensor (30 - 50mm),
The sensor LED turns off and starts to ash very
slowly (once every 2 seconds),
Each ash will give a different time period, after
7 ashes take the hand away from the detection
range. The run time is now set for 60 seconds.
For other run times, see the table below. The sensor now works normally, and is no longer in program-
ming mode.If an error has been made in programming the run time, it is necessary to start from Step 1.
The following procedure should be conducted after installation to ensure the product is
functioning correctly.
9.1 The Purpose of Commissioning:
• To conrm the correct designation of product versus application.
• To conrm the correct supply water conditions for the product / installation.
• To adjust the mixed temperature if necessary to suit the water supply conditions of the installation.
• To check the product is performing properly.
• To start an audit log and record appropriate data.
This product is factory set at 40 ± 1°C * with supplies of circa; 3 bar balanced pressure and
temperatures of 15°C cold & 65°C hot (i.e. an inlet ∆t of 50°C & a hot / mix ∆t of 24°C )
For supply requirements, see 4.0 Water supply conditions.
9.2 Commissioning Process
• Establish that the supply conditions are within the requirements of HTM 04 and the supply
conditions outlined above. If not investigate.
• When conditions are acceptable record them, together with hot and cold temperatures. Establish ∆t.
Check the outlet mix temperature is within 41°C ± 2°C *, if not (probably due to ∆t > 5 difference to
factory setting) adjust appropriately. (See 12.1)
• If mixed water temperature is correct undertake an ‘in eld’ cold water isolation (CWI) test (See 9.5).
Pass – restore supply and record mixed temperature,
Fail – See 9.5 in eld ‘Cold Water Isolation’ test.
9.3 Audit Checks on TMV’s
The purpose of a performance audit of a product is:
• To check the product continues to perform properly.
• To ag the need for the product to be adjusted due to supply condition changes or mechanism
ageing.
• To ultimately identify the need for product maintenance.
Note - Additionally these audits facilitate regular verication of the supply conditions in accordance
with HTM 04 requirements. (See decision tree FC3)
* See section 9.6: setting temperature