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2.4.3 Heat meter
RKY F Application: heating – cooling
Approval: EN1434 class 2: qp 0.6 ... 6m³/h;
MID: qp 0.6 ... 60m³/h
Ambient class: EN1434 class C/MID class E1+
M1
Ambient Temperature: °C 5 ... 55
Power supply: 3.0 VDC battery - max. 12 years
lifetime; external supply 3.0 ... 5.5 VDC
Mounting position: any position
Protection class heating: IP 54; cooling: IP 68
Interfaces Open Collector pulse output1 - output
for testing and communication2
Volume pulse value3 1 ml ... 5000 l/pulse
1: The pulse output can be chosen without galvanic isolation (standard) or with galvanic
isolation (only with battery supply). The flow sensor has by default a 4 wire impulse cable
with a length of 2.5m (5 or 10m optional)
2: The output for testing is a combined pulse output. The flow sensor can either emit a
high resolution test pulse (standard) or communicate via the same output. By using an
adapter the flow sensor can be read via the HYDRO-SET software.
3: The pulse duration is between 1 and 250 ms. It depends on the pulse value and on the
nominal flow rate qp. Standard pulse values: 1, 2.5, 10, 25, 100, 250 l/pulse
Temperature range heating - battery supplied °C 5 ... 90 / 5 ... 1051
Temperature range heating - external supplied °C qp 0.6 ... 2.5m³/h: 5 ... 130; qp 3.5 ...
60m³/h: 5 ... 1501
Temperature range cooling °C 5 ... 90 / 5 ... 1051
1: Only in rising or falling pipes or tilted installation
2.4.4 Control valves
VMR valves are motorized valves used in home
applications and small installations to control the flow of
hot and cold water. The 2 ports are designed for On-Off
zone control of domestic systems. The valve, thanks to
its cylindrical shut-off, shunts flow which is independent
from the differential pressure between ports. This shut-off
can have two operating positions depending on how the
electric motor that moves it is powered. The head of the
valve can be removed without draining up the plumbing
system: this makes valve maintenance quick and flexible.
Without the head the valve is normally closed. Valves
have an external lever for manually positioning the shut-
off in its central position.
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