Determination Of Pressure Loss; Mounting Instructions; Operating Hint - Siemens WFM407 series Manual

Determination of pressure loss

Mounting instructions

Operating hint

6/8
Building Technologies
HVAC Products
∆
p
1,0
0,5
0,4
0,3
0,2
0,1
0,05
0,04
0,03
0,02
0,01
0,2 0,3 0,4 0,5
• Observe the local regulations for the use of heat meters (mounting, sealing, opera-
tion, etc.).
• Mount the heat meter according to the type either in the flow or return between two
shut-off valves. It must be easily accessible for reading and service work.
• A stilling channel is required at the inlet in front of the device:
150 mm for installation lengths of 80 mm and 110 mm
−
200 mm for an installation length of 130 mm
−
• If the device is only to be used when starting up, the spacer can be mounted first.
• Before installing the meter, rinse the pipe well; mount the spacer for this purpose.
• When installing, observe the flow sign – an arrow on the flow meter.
• If tees of a different brand are used, ensure that they comply with the standard
EN1434!
• Position the calculator so that the display is easy to read.
• After mounting, test the system for pressure.
• Protect the calculator, both temperature sensors and the screw pipe connections
with seals against unauthorized access.
• Insulate the lead at the installation site of the temperature sensors.
• Observe the local regulations for recalibration purposes.
Electronic Heat Meter
Q 1,5 m /h
Q 0,6 m /h
3 3
p p
0,6 1,0 1,2 1,5 2 2,5 3 4 5
Q 2,5 m /h
3
p
Pressure loss curve
∆
p Pressure loss in bar
Q
6
Q Flow in m
3
/h
CE1N5331en
03.11.2005