CALEFFI CONTECA EASY ULTRA - Maintenance Work; Hydraulic Characteristics

The broken red line indicates the pressure drop at the permanent ow rate Qp (Dp=3,5 m w.g., for threaded connections only).
Hydraulic characteristics
Flow meter + probe pockets (if threaded connection)
Maintenance work
Strainer cleaning
It is periodically necessary to clean the strainer on the ow pipe
designed to protect the volume meter.
By observing the instant ow rate and ow-return temperature
difference values (signicantly lower ow rate compared to the nominal
value and signicantly higher temperature difference), it is easy to nd
out whether the strainer is clogged and clean it.
2) User circuit diagram - 2-way zone valve regulation
G
Central heatin
g
system
System
kWh
4
1/2” 3/4” 1” 1 1/4” 1 1/2”
Kv
5,0 7,9 17,8 17,8 33,0
p (m w.g.) p (kPa)
DN 50 DN 65 DN 80 DN 100 DN 125 DN 150 DN 200
Kv
53 89 142 223 360 540 900