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Advanced Menu 

   

 

 

 

 

 

 

Default = Disabled

 

There are two Flow  Alerts: 

HIGH FLOW

*

 and 

LOW FLOW

  and these relate to the  flow  through the selected 

valve. 

 

 
 
Fig. 18 
 
 
 
 
 
 
 
 
 
 
 
 

*

For static balancing valves, 

HIGH FLOW

 conditions would normally mean that the flow through the device is in 

excess  of  recommended  maximum  flows  as  quoted  in  BS7350.  For  automatic  balancing  valves, 

HIGH  FLOW

 

conditions  would  normally  mean  that  the  maximum  working 

Δp

  for  the  device  has  been  exceeded.  The 

presence  of  the 

HIGH  FLOW

  alert  on  the  screen  will  almost  certainly  be  accompanied  by  significant  system 

noise. 

 

Note: if Flow Alerts are Enabled when working on an unstable system, the displayed alert may change, quite 
frequently,  between  the  HIGH  /  LOW  options  and  this  may  only  serve  to 

impede 

 rather than assist 

 the 

commissioning process. Hence, it is strongly recommended that Flow Alerts remain Disabled when work 
is being carried out on an unstable system, or on a system that has little regulation. 

 
 
 
 

 

 

 

 

 

 

 

Default = 5  min

 

The Backlight Timer sets the period of time after which the backlight will turn off after a period of inactivity. 
A short time will preserve battery life. 
 
Fig. 19 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

13 

High / Low Flow Alerts 

Enabled 

Use the 

▲▼

 

buttons to move 
between the 
settings. 
Press

 OK

 

to accept. 

Disabled 

Select Light-On Time 

5   min 

Use the 

▲▼ 

buttons to move 
between the 
settings. 
Press

 OK

 

to accept. 

10 min 

1   min 

Always On 

Summary of Contents for AC7

Page 1: ...nt Range Accuracy 1 Contact Us 1 Description of AC7 2 Connection Procedure 3 Disconnection Procedure 3 Menu Map 4 Display Menu 5 Main Menu 8 Units Menu 11 Damping Menu 12 Advanced Menu 13 Quick Valve Storing Function 15 Appendices Glycol Water Specific Gravity Chart A1 Recommended User Maintenance Procedures A2 ...

Page 2: ...www comdronic co uk ...

Page 3: ...racy Accuracy of reading 1 of reading or 0 20 kPa whichever is greater Max Allowable Static Pressure 20 bar Measurement Range 1 0 kPa to 800 kPa Factory calibration is carried out in controlled conditions using reference equipment which has been independently calibrated to UKAS standards Generally it is recommended that AC7 handsets are serviced and calibrated annually please Contact Us for furthe...

Page 4: ...ction tube to this connector Internal strainers protect the sensor unit from small dirt particles These are service parts Note blocked strainers will slow performance and reduce accuracy Equalising valve Press to cancel an entry or to return to a previous screen Also use to switch the AC7 OFF 2 9V Battery 1 x Alkaline 9V PP3 battery Battery access at rear Typical effective operating time up to 20 ...

Page 5: ...wnstream test point on the subject measuring valve device 5 Ensure that the equalising valve on the AC7 is OPEN 6 Attach the free ends of the RED and BLUE connection tubes to the colour coded connection points on the AC7 7 OPEN the isolating valves on the connection tubes to allow the line fluid to purge any air from inside the tubes 8 CLOSE the isolating valves on the connection tubes 9 Find a sa...

Page 6: ... The default starting digit is always zero then use the buttons to change the value Use the button to add a digit and the button to remove a digit If a decimal point is required press the button when the zero digit is showing To enter a negative number press the ZERO button before any number is added The following example shows how a user would set a Design Flow of 1 05 MENU enters the Main Menu m...

Page 7: ... fig 2 shows an example of displayed data when an automatic balancing valve has been selected Fig 1 5 Schematic of the selected valve Kvs of the selected valve Details of the selected valve Derived Flow Calculated by the AC7 using the measured Δp and the Kvs Measured Δp 5 30 Crane Fixed D931 15mm KPa l s 0 141 Kvs 2 20 ZERO DP SG TEMP HIGH This symbol will show when the remaining battery power dro...

Page 8: ...the valve will also need to be changed to match the new value 6 Current cartridge setting Flow status message Details of the selected valve Derived Flow Measured Δp 20 48 FlowCon Green Green 0 15 25mm KPa l s 0 210 FLOW OK l s 0 210 5 00 Design Flow for this valve at this setting Press the button to change valve setting Current handwheel setting Kvs of the selected valve at the current handwheel s...

Page 9: ...rrow indicates that the Δp must be increased to achieve the Design Flow Approx actual flow Design Flow for this valve at this setting Δp required to achieve Design Flow Current valve setting FlowCon Green Green 0 15 25mm LOW FLOW 0 210 l s 5 00 14 50 KPa 0 200 l s 16 00 1 50 Down arrow indicates that the Δp is unnecessarily high Measured Δp Difference between Measured Δp and Design Δp Flow status ...

Page 10: ...omatically updated whenever an AC7 is serviced by Comdronic Note whilst every effort is made to ensure that stored valve data is correct valve manufacturers invariably reserve the right to modify their products without notice and so Comdronic cannot be held responsible for any inaccuracies or omissions Fig 8 Make selections for all four parameters i e Manufacturer Type Fig No Size before pressing ...

Page 11: ... to Appendix I for further information Fig 10 Once the new value is correct on the screen press OK to accept it Or press EXIT to exit the screen and retain the current setting Note while SG is set to a value other than 1 0 SG will show at the top of the chosen display screen as a reminder to the user that readings are being subjected to a correction It is strongly recommended that users regularly ...

Page 12: ... Flow must be entered as a percentage and is generally required when carrying out advanced proportional balancing Typically the value used will be the same as the calculated Design Flow percentage on the index circuit Balancing to 100 target on subsequent valves will ensure that valves adjacent to the index valve are balanced Fig 12 Once the new value is correct on the screen press OK to accept it...

Page 13: ... Available flow options are l s l m l h USGPM UKGPM m3 h m3 m or m3 s Available velocity options are m s or f s Fig 15 11 2 2 Kvs Use the button to add a digit Current setting Enter New Kvs 2 3 Use the button to remove a digit Use the buttons to increase or decrease a value Pa x 0 000145 Conversion factor from pascals Select DP Unit 0 0 Decimal place format for the selected units Use the buttons t...

Page 14: ... user to adjust the period of time over which readings are averaged from a minimum value of 0 6 SEC to a maximum value of 11 0 SEC Increasing the Sample Time will make the screen appear to update less frequently but with a more stable reading Fig 17 Once the new value is correct on the screen press OK to accept it Or press EXIT to exit the screen and retain the current setting 12 Update Time 2 00 ...

Page 15: ...Note if Flow Alerts are Enabled when working on an unstable system the displayed alert may change quite frequently between the HIGH LOW options and this may only serve to impede rather than assist the commissioning process Hence it is strongly recommended that Flow Alerts remain Disabled when work is being carried out on an unstable system or on a system that has little regulation Default 5 min Th...

Page 16: ...ushing purposes Velocity units are available m s or f s and these can be selected in the Units Menu A valve will need to be selected see page 8 in order for this feature to be used Fig 22 Once the new value is correct on the screen press OK to accept it Or press EXIT to exit the screen and retain the current setting 14 Select Auto Off Time 5 min Use the buttons to move between the settings Press O...

Page 17: ...he further feature options are shown below Note even when a user is within the Quick Valve screens the AC7 will be continuing to take readings even if the AC7 is not connected to a system it will still be taking a reading and it may have a valve selected or a manual Kvs entered Also values for Target Flow and or Design Flow may have been entered For the purposes of this section this data will be r...

Page 18: ...ill display the following options Fig 26 Gp 6 No 9 Δp and Flow from the Live Data 5 30 KPa MENU 0 256 l s Use the buttons to select a Group No Use the buttons to select a Valve No Currently selected Group No Valve No 16 Gp 6 No 9 SAVE LIVE DATA TO LOCATION Press EXIT to take no action and revert to previous screen Press the button to save the Live Data to this location EXIT ...

Page 19: ...1 057 1 067 1 077 1 084 1 090 40 0 990 1 004 1 018 1 029 1 042 1 054 1 064 1 074 1 085 1 091 1 098 30 0 996 1 007 1 022 1 034 1 047 1 059 1 070 1 080 1 092 1 099 1 105 20 0 999 1 010 1 026 1 038 1 052 1 065 1 076 1 088 1 099 1 106 1 114 10 1 000 1 013 1 028 1 042 1 056 1 070 1 082 1 094 1 105 1 113 1 120 0 1 000 1 015 1 029 1 045 1 061 1 075 1 088 1 100 1 112 1 120 1 128 10 1 048 1 065 1 079 1 092...

Page 20: ...first 3 Whilst keeping the AC7 upside down disconnect the water supply from the Blue connector and reattach it to the Red connector and allow water to flow out of the Blue connector This is the forward flush In addition to performing simple flushes if the AC7 is regularly used on extremely dirty systems it may also be necessary to periodically perform an advanced flush An advanced flush is the sam...

Page 21: ...orget the O rings Spare set of strainers 8 5mm bit for strainer removal and re fitting Gently unscrew the male connectors from the strainer housings IMPORTANT Take care not to disturb i e move the strainer housings If a male connector doesn t readily unscrew use a 14mm wrench to hold the strainer housing in place before any additional force is applied Retain O rings for later reassembly Use the 8 ...

Page 22: ...www comdronic co uk User Notes ...

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