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Comdronic AC6-HP, Instructions Manual

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20

12.  Glycol / Water SG Chart 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPECIFIC GRAVITY OF WATER / GLYCOL MIXTURES 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temperature 

% Glycol Additive 

Deg. C 

0 

10 

20

30

40

50

60

70 

80 

90

100

80 

  

  

0.991 1.003 1.017 1.026 1.036 1.046 1.054 1.062 1.068

70  

 

0.990 

1.000 1.010 1.023 1.034 1.042 1.053 1.062 1.069 1.075

60  

 

0.995 

1.007 1.017 1.030 1.041 1.050 1.060 1.070 1.076 1.083

50  

 

1.000 

1.013 1.013 1.035 1.048 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 1.107  1.118  1.127 1.135

-20 

  

  

  

  

1.068 1.083 1.097 1.113  1.124  1.133 1.136

-30 

  

  

  

  

  

1.087 1.100 1.118  1.128  1.137 1.137

-40 

  

  

  

  

  

  

1.102 1.122  1.133  1.138 1.138

 

 

 

 

 

 

 

 

 

 

 

 

E & OE 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for AC6-HP

Page 1: ...es 9 Technical Specification 10 Statement of Conformity 11 Contact Us 12 Glycol Water SG Chart 1 The Comdronic AC6 Electronic Commissioning Unit The Comdronic AC6 electronic commissioning unit has been developed in response to demand from discerning commissioning engineers requiring an improvement in measuring techniques for differential pressures in heating and air conditioning systems The Comdro...

Page 2: ...high temperature systems and systems containing flushing agents cleaning agents and or antifreeze agents This list is however not exhaustive Please note whilst every effort is made to ensure that valve data is correct Comdronic Ltd cannot be held responsible for modifications updates and new product additions Valve manufacturers invariably reserve the right to modify their products without notice ...

Page 3: ...lt values for all the editable functions as follows Language English Pressure kPa Flow l s Design Flow 0 l s Target Flow 0 Flow Alerts Disabled Back Light Timer 5 minutes Auto off Timer 5 minutes Update Time 1 second Sample Time 3 seconds Specific Gravity 1 0 Details of how to change these settings are provided later in this manual Automatic Alerts In addition to the menu options which can be sele...

Page 4: ...e isolating valves on the red and blue connection tubes The differential pressure across the subject measuring device will generate flow through the connection tubes from the high pressure side to the low pressure side thus expelling the air from the tubes 6 Close the isolating valves on both the red and blue connection tubes 7 Press the ZERO button to set datum at zero 8 Open the isolating valves...

Page 5: ...ect the correct function which is then accepted using the button Press the MENU button twice for language options Language options apply to Menus and Help screens only Menu functions that require a numeric value to be added use a system which is best described using the following example Example Setting the design flow to 1 05 l s MENU selects the Main Menu option moves the cursor down to the Desi...

Page 6: ...easured The handwheel position for variable orifice valves is required so that the correct value of Kvs is used for the derivation of the flowrate This screen allows the position to be edited The display shows the maximum and minimum recommended positions for the valve The minimum position shown ensures that the valve maintains reasonable accuracy MAIN SELECT VALVE VALVE POSITION DESIGN FLOW TARGE...

Page 7: ... be edited in this screen When a value is entered it will be displayed on the main display in the target flow box Target flow must be entered as a percentage and is generally derived when carrying out 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 adj...

Page 8: ...ed for a variable orifice device the Kvs is required for each position of the handwheel Change SG Specific Gravity This screen allows the user to enter the value of the SG see Chapter 12 Typically this would be used when glycol or other antifreeze agents are used in the system Note When an SG is set to a value other than 1 0 an advisory note is added to the top of the display 0 x 4 Kvs Enter user ...

Page 9: ...ll change the displayed units to kPa psi bar cmH2O IWGA inches water gauge Ft HD feet head or Pa Use the button to accept Flow This screen will display volume flow units The button will change the units through l s l m l h USGPM UKGPM m3 h m3 m m3 s Use the button to accept UNITS PRESSURE FLOW kPa 0 00 Pa 1000 Select D P Unit Conversion factor from base unit Edit box L S 0 00 L S X 1 Select Flow U...

Page 10: ...d The Flow Pressure Display is designed for most general commissioning purposes The type of valve selected Fixed or Variable is shown as a schematic symbol along with handwheel and Kvs data The differential pressure and flow are displayed and continuously updated according to the signals being received from the valve being measured DISPLAY FLOW PRESSURE MULTI DISPLAY PRESSURE ABOUT Valve being mea...

Page 11: ...een adjusted to the predicted position use the keys to adjust the handwheel setting Note The design flow and the target flow could be different values so it is important to use the correct navigation button The predictive process is iterative due to the unknown valve authority in the circuit so it will be necessary to use this feature more than once The measuring valve selected is described in the...

Page 12: ...o select the correct valve setting the design flow is displayed within the valve image If the DP is not sufficient to create correct flow conditions the box above the inlet pipe to the valve will display an up arrow and a value indicating that the DP will need to be increased to achieve the design flow The value displayed is the design DP less the actual DP In the event of the actual DP being high...

Page 13: ...AC6 unit as a simple manometer About The About screen gives the unique serial number of the unit plus the firmware version 5d Damping Menu Use the keys to select option followed by button to accept COMDRONIC AC6 www comdronic co uk 6 03 200 AC6 0123 0 00 kPa Unique Serial No Firmware version DAMPING UP DATE TIME SAMPLE TIME ...

Page 14: ... Use keys for coarse adjustment and keys for fine adjustment A typical setting would be 3 seconds This value can be edited up to 11 seconds and it represents the base time over which the readings are taken for the rolling average system A typical time of 3 seconds allows a large number of readings to be taken before the mean calculation is made The averaging system continues to use 3 seconds of me...

Page 15: ...ons Back Light Timer The Back Light Timer sets the period of time that the light remains on Pressing any key will re activate it Setting the light to a short time will preserve battery life Use the keys to select option followed by button to accept Auto Off Timer The Auto off timer sets the time the unit remains on Setting the time to a short time will preserve battery life Use the keys to select ...

Page 16: ...es each with ten valves The group number can be selected using the keys and the valve number can be selected using the keys The MENU button gives the user the option to save or delete If the screen is black a valve is already in the location However if the screen is white it is possible to load a valve to this location MM Inches View size as MENU TO EXIT Group 1 Valve 1 0 00 kPa 0 000 l s Group No...

Page 17: ...rs The example shown is for a variable orifice double regulating valve all other valve types have a simpler screen When using automatic balancing valves the procedure for using Quick Valve is the same as if traditional balancing valves but the screen showing saved data is different as shown below The above example shows that the actual DP is greater than the design DP therefore the flow status is ...

Page 18: ...ter 1 of reading or 0 2 kPa whichever is greater Max Allowable Static Pressure 10 Bar 20 Bar Measurement Range 0 5 kPa to 200 kPa 2 kPa to 600 kPa Effective Operating Time 20 hours with standard Alkaline PP3 battery Calibration Standard factory calibration is carried out in controlled conditions using calibrators traceable to National Standards It is recommended that AC6 units are recalibrated at ...

Page 19: ...e Comdronic AC6 Electronic Commissioning Unit is manufactured in the EU has been calibrated in accordance with standards traceable to national standards and conforms to the published specification It is CE marked in accordance with the relevant EC directives ...

Page 20: ...048 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...

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