oventrop Regumat Einbau- Und Betriebsanleitung Für Fachpersonal Seite 14

TTENTION
When the circulation pump is switched off, a low
gravity circulation depending on the circulation
pressure is still possible within the heating system
despite the check valve as the latter is not tight
sealing.
5.3 Setting of the bypass at the three-way mixing
valve ("Regumat M3")
The pump groups with three-way mixing valve are ad-
ditionally equipped with a bypass with manual preset-
ting at the three-way mixing valve. When leaving the
factory, the bypass is closed (Slot of the bypass stem
turned by 90° towards the bypass channel, position
"off", see illustr. 5.2).
By turning the bypass stem by 90°, i.e. slot running
parallel to the bypass channel, position "on", the ma-
ximum flow rate can be reached.
Kv-values:
Mixing valve (I ¨ II) and bypass stem
fully opened:
Mixing valve closed (III ¨ II),
bypass fully opened
Mixing valve fully opened (I ¨ II),
bypass closed
WARNING
The safety screw of the bypass stem is marked with
a coat of lacquer. This safety screw must
never be loosened when the system is under pressure.
There is danger that hot water may escape uncon-
trollably.
Illustr. 5.2 Bypass setting
5.4 Actuator ("Regumat M3 / M4")
WARNING
The electrical connection must be carried out in
accordance with the valid regulations
The pump groups with mixing valve are supplied with
an actuator.
The following models are available:
Actuator NR230 for 230V
Actuator NR24 for 24V
14
The actuators NR24 and NR230 are used for the mo-
torised actuation of three- and four-way mixing valves.
The actuators can be activated via any commercial
control system with a three point output. If the actuator
rotates clockwise, the flow temperature increases until
the limit stop of the actuator is reached (supply ope-
ned, bypass closed). The flow temperature drops if
the actuator rotates anticlockwise until the opposite
limit stop is reached (supply closed, bypass opened).
Technical data actuator:
Operating current
Protective system
Torque
Operating time
Manual setting
Ambient temperature
Length of cable
Kv = 4.7
The angle of rotation is limited to 90°. Having reached
the limit stops, the actuator is switched off electrically
Kv = 2.6
and is without current. In case of malfunction of the
control system, the actuator can be converted to ma-
nual operation with the help of an additional rotary
Kv = 4.3
knob.
Illustr. 5.3 Connection diagram three point control
Safety
5.5 Markings
screw
– CE marking on the pump:
– Indications on the body:
OV
DN
PN
NR230: 230V 50Hz
NR24:
II (shockproof)
5 Nm
140 s
mechanical gear release
0°C up to +50°C
2.2m
Controller
white
white
black
CE-marking
Oventrop
Size
Nominal pressure
24V 50Hz
Controller
blue
white
brown