Comdronic AC6-SP Manual de usuario
1
Electronic Commissioning Unit
Instructions
1. The Comdronic AC6 Electronic Commissioning Unit
2. Health and Safety
3. Description of Unit
4. Connection and Set-up Procedure
5. Menu System
a. Main Menu
b. Units Menu
c. Display Menu
d. Damping Menu
e. Advanced Menu
6. ‘Quick Valve’ Storing Function
7. PcomPRO Project Application Software
8. Spares and Accessories
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 Comdronic AC6 unit utilises state-of-the-art technologies in the field of electronics, software and
hydraulic protection for the sensitive measuring element.
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2. Health and Safety
Comdronic Ltd takes every reasonable precaution to ensure that AC6 commissioning units
are designed, constructed, calibrated and tested for safe and trouble-free operation when
used in accordance with the operating instructions.
For safe operation, it is important that commissioning engineers read and understand the
instructions contained within this manual. It is also very important that those employed in
the function of commissioning are aware of the general hazards associated with the systems
being commissioned.
When working with the AC6, it is the user’s responsibility to ensure that any Personal
Protective Equipment (PPE) or clothing is worn as appropriate to the hazards potentially
present.
It is also the user’s responsibility to understand the Health and Safety issues relating to high
pressure systems, 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 and, as
such, delays in updating the Comdronic™ software may result. The user is advised to check
performance data (Kvs values) of specific valves prior to use.
3. Description of Unit
The Comdronic AC6 Unit comprises the following:
Hand-held electronic manometer, enclosed in a removable rubber protector.
Quick-connect tubing set, complete with manually operated isolation valves.
A variety of adapters to connect to the majority of currently manufactured balancing valves.
Toolkit.
Lanyard for attachment of the unit to pipework etc.
Spare battery.
Instruction Manual
Quick Start Guide and Menu Map.
All above incorporated in a lightweight carrycase.
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4. Connection and Set-up Procedure
For immediate operation of the unit, please refer to the Quick Start Guide.
Press the MENU button to switch the unit on.
Use the button for cancelling entries or for returning to previous screens. The button also
allows the unit to be switched off.
Use the MENU button to show the display options.
Press ?at any time for context-sensitive help files. Use the ▲▼buttons to scroll through help
files.
System Defaults
The AC6 unit has been set up with default 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 selected by the user, there are a series of automatic
functions which will be displayed on the message bar at the top of the screen. These include:
Zero Sensor
Low Battery
Change Battery
Specific Gravity (displays when not set to 1.0sg)
Temperature Warning (when internal temperature is high)
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Connection
Select the correct connection adaptors for the device being measured.
Attach adaptors to the connection tubes before attachment to the valve or measuring device.
Each connection tube is fitted with an isolating valve and it is a matter of personal preference
whether the hoses are used with the isolating valves adjacent to the AC6 unit or adjacent to the
subject measuring device.
1 Before starting, please ensure that:
oNeither tube is connected to the AC6, and
oBoth isolating valves on the connection tubes are in the CLOSED position.
2 Attach the red plastic connection tube to the high-pressure test point on the subject
measuring valve or device.
3 Attach the blue plastic connection tube to the low-pressure test point on the subject
measuring device.
4 Ensure that the equalising valve on the AC6 is OPEN (turn anti-clockwise) and then attach
the AC6 unit to the free ends of the red and blue connection tubes.
5 Open the 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 on both the red and blue connection tubes.
9 Close the equalising valve.
10 The unit will now read differential pressure.
Notes:
1 When extremes of temperature change are apparent i.e. when used on a hot system or if
the instrument is transferred from a warm environment to a cold environment, it may be
necessary to zero the AC6 unit after a period of time has elapsed and the unit has
stabilised.
2 The Auto-off Timer will switch the unit off after a defined period of inactivity.
IMPORTANT SAFETY NOTE:
For safe removal of the AC6 unit, ensure that the equalising valve is OPEN before CLOSING
the isolating valves on connection tubes. The AC6 unit and the connecting tubes can now be
removed safely from the subject measuring valve or device.
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5. Menu System
The AC6 has been designed with 5 menus for ease of use. Each AC6 is supplied with a ‘Quick Start
Guide’ which shows the layout of each menu.
Main Menu Units Menu Display Menu Damping Menu Advanced Menu
Select Valve Pressure Flow/Pressure Update Time Flow Alerts
Valve Position Flow Multi Display Sample Time Back Light Timer
Design Flow Pressure Auto Off Timer
Target Flow About View Size As
Pipe Size
User Kvs
Change SG
The menu system is accessed using a single press of the MENU button. Each menu can then be
selected by using the ◄► keys. When the correct menu is shown on the screen, use the ▲▼
keys to select 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 Design Flow option
accepts the Design Flow option
▲will change the value of the first column to 1
►selects the next column
▼selects a decimal point
►selects the next column
►selects the next column
▲▲▲▲▲,changes the digit to 5
accepts the selected value of 1.05
returns to the main display
To enter a negative number, use the ZERO key before any number is added.
To enter a decimal point, use the ▼arrow when the zero digit is showing.
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5a. Main Menu
Within the Main Menu there are 7 functions
Select Valve
To select the manufacturer, use the ◄► keys.
To select the type of valve, cat no. and size, use the ▲▼ keys followed by the ◄► keys for
individual selections.
Important: Select all items on screen before using button to accept.
Valve Position
This must be entered when variable orifice valves are being measured.
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
TARGET FLOW
PIPE SIZE
USER Kvs
CHANGE SG
Valve make
r
Fixed
Cat No.
Size
0
x = 4
Min = 1 Max = 4
Edit box.
Minimum and
maximum usable
settings.
Current setting.
Press
to retain.
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Design Flow
The design flow for the selected valve can be edited in this screen.
When a value is entered, the actual flow will be calculated as a percentage of the design flow and
will be displayed on the Multi Display in the design flow box. Design flow can be entered in any of
the units selectable in the Units Menu.
Target Flow
The target flow for the selected valve can 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 adjacent to the index valve
are balanced.
0
x = 10 L/S
Enter design flow
Current setting.
Press
to retain.
0
x = 94%
Enter Target flow
Edit box.
Edit box.
Current setting.
Press
to retain.
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Pipe Size
Pipe size is entered if the user wishes to use the meter to establish the velocity in the pipe. To
display velocity, choose a velocity unit from the Units Menu.
User Kvs
This screen allows for the user to enter the Kvs value of a measuring device that is not held in the
database of valves. Typically this would be a fixed orifice device. When a Kvs is required 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 Kvs
Current setting.
Press
to retain.
Edit box.
0
Enter SG
x = 1.0
Current setting.
Press
to retain.
Edit box.
Current setting.
Press
to retain.
Edit box.
0
x = 0 mm
Enter Pipe size
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5b. Units Menu
This screen gives the user the option of selecting the preferred units for display on the AC6.
Use ▲▼ keys to select option followed by the button to accept.
Pressure
This screen will display differential pressure units. The ►button will 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 Unit
Conversion factor
from base unit.
Edit box.
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Note: Velocity units are available (Metres per second and Feet per second)
In order to display the current velocity in the system being measured it will be necessary to select
the following:
1 – The valve being measured (Main Menu >> Select Valve)
2 – The pipe size (Main Menu >> Pipe Size)
3 – The velocity units (Units Menu >> Flow)
Use ▲▼ keys to select option followed by the button to accept.
5c. Display Menu
The Display Menu has four options:
Flow/Pressure Display when a Fixed / Variable Orifice Valve is Selected
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
A
BOUT
Valve being
measured.
This message
scrolls across
screen.
Kvs of valve
bein
g
measured.
Reminder for user to
zero unit at start up.
Schematic for valve
type.
FODRV shown.
Differential pressure
being measured by
AC6.
Flow calculated by
AC6 from DP and Kvs
value.
2.2 Kvs
5.3 kPa
0.14 L/S
Crane D931 Fixed 15mm
ZERO DP
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