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Application:
Four port fixed orifice double regulating and control valve
"Cocon 4TR" for heating and cooling systems (e.g. Fan Coil
installations, chilled ceiling modules and fan convectors).
Max. working temperature:
+120°C
Min. working temperature:
-10°C
Max. working pressure:
10 bar
Max. differential pressure:
1 bar
Fluid:
Water, ethylene glycol water
mixtures or propylene glycol
water mixtures (max. 50 )
pH value 6.5 to 10
Models:
"Classic" test points, G
1
⁄
male thread with 15 mm compression
2
fittings:
Item no.
kvs value
kv value of the
fixed orifice
1148051
0.45
0.61
1148052
1.0
1.06
1148053
1.8
2.8
Parallel model (Illustr. 8):
Item no.
kvs value
kv value of the
fixed orifice
1148151
0.45
0.61
1148152
1.0
1.06
1148153
1.8
2.8
Function:
The Oventrop regulating valve "Cocon 4TR" controls the room
temperature by changing the flow rate to the terminal unit with
the help of actuators whilst maintaining an almost constant flow
within the distribution circuit. Due to the reduction of the bypass
flow rate to 70 , the resistance of the terminal unit is taken into
account. Setting of the flow rate is carried out by use of the inte-
grated, hidden, infinitely adjustable presetting device with mem-
ory lock. The flow rate can be directly read off the flow-meter "OV-
DMC 2" when connected to the two pressure test points. The ter-
minal unit can be isolated from the system and can be drained,
filled, bled and flushed with the help of the service tool (available
separately).
Bronze body, seals made of EPDM or PTFE, bonnet made of
brass resistant to dezincification, valve stem made of stainless
steel with double O-ring seal.
Installation:
– The flow direction must comply with the arrow on the valve
body.
– The valve may be installed in any position (electric actuators
may not be installed vertically downwards).
– Do not use any lubricant or oil when installing the valve, as
these may destroy the valve seals. If this is unavoidable, all
lubricant or oil residues must be removed from the pipework
by flushing the latter.
– All installation work being completed, check all installation
points for leaks.
– Before initial operation, bleed distribution circuit and terminal
unit thoroughly.
Pipe connection / 15 mm compression fitting:
– Before connection, cut copper pipe at a right angle and debur
and calibrate if required. Please ensure that the connection
surface does not show any damage and that the pipe pro-
trudes the compression ring for at least 2 mm.
– In case of tensile or flectional strains, the pipes have to be
fixed additionally.
– When installing copper pipes with a wall thickness
(
1 mm according to the instructions of the pipe manufactur-
er), reinforcing sleeves are to be used.
_ Provide for expansion loops in case of thermal conditional
changes in length.
Actuators:
Oventrop offers an extensive range of actuators for the four port
fixed orifice double regulating and control valve "Cocon 4TR".
The actuators can be found in the catalogue.
6
1
Presetting according to calculated values:
1.1 Unscrew protection cap of the regulating stem.
1.2 Close the valve disc by turning a 4 mm spanner clockwise.
1.3 Then open the regulating disc by turning the 4 mm spanner
anticlockwise according to the number of turns taken from
chart 3.
Note: To achieve an almost constant flow rate in the distri-
bution circuit, the set flow value must be identical with or be
lower than the maximum possible flow rate in the terminal
unit.
1.4 Finally, using a screwdriver, turn the lock nut clockwise until
stop (the presetting once chosen is now reproducible) and
replace protection cap tightly.
2
Presetting by differential pressure measurement (illustr. 2):
2.1 Unscrew protection cap of the regulating stem.
2.2 Carry out differential pressure measurement according to
point 3.
Gland
2.3 Now carry out presetting of the valve disc by use of the 4 mm
marking
spanner until the required flow rate is indicated on the "OV-
DMC 2".
P1
P2
Note: To achieve an almost constant flow rate in the distri-
bution circuit, the set flow value must be identical with or be
P3
lower than the maximum possible flow rate in the terminal
unit.
Gland
2.4 Finally, using a screwdriver, turn the lock nut clockwise until
marking
stop and replace protection cap tightly.
P1
P2
3
Differential pressure measurement/Flow determination:
P3
3.1 Ensure valve is in full flow conditions by either turning the
protection cap clockwise until it stops or using the control
system
actuators are already fitted.
3.2 Connect flow meter "OV-DMC 2", item no. 1069177 or an
industry standard manometer to the pressure test points and
measure the differential pressure.
Note: The relationship between flow and differential pres-
sure/signal is illustrated in chart 2.
4
Isolation (illustr. 3):
4.1 Isolate ball valve.
4.2 Unscrew protection cap of the regulating stem.
4.3 Close the regulating stem by turning a 4 mm spanner clock-
wise.
Note: To return the valve to its regulated setting after isola-
tion, care must be taken not to adjust the lock nut whilst per-
forming this operation.
5
Filling/draining/bleeding/flushing by use of service tool,
item no. 1090551 (illustr. 4):
Note: If only the succeeding system shall be filled or drained,
the valve has to be isolated as described in point 4.
5.1 Unscrew protection cap of the regulating stem.
5.2 Loosen regulating insert by turning a 10 mm spanner anti-
clockwise (max. 1/4 turn).
5.3 Fit the service tool to the valve.
Attention: Tighten 19 mm compression nut closely (max. 10
Nm).
5.4 Fit a 6 mm square spanner to the tool and carry out
filling/draining/bleeding or flushing by turning it anticlock-
wise.
5.5 After procedure: Turn 6 mm square spanner clockwise until it
stops, remove service tool and re-tighten insert by use of the
10 mm spanner (max. 10 Nm).
1 mm
Replace protection cap tightly.
6
Measurement of differential pressure (illustr. 6) /
temperatures (illustr. 5) of terminal unit:
6.1 Unscrew protection cap of the regulating stem.
6.2 Loosen regulating valve insert by turning a 10 mm spanner
anticlockwise (max. 1/4 turn).
6.3 Fit the service tool to the valve.
Attention: Tighten the 19 mm compression nut closely (max.
10 Nm).
6.4 Fit measuring adapter (item no. 1060298) to service tool.
6.5 Fit 6 mm square spanner to the service tool and open drain
valve by turning it anticlockwise.
6.6 Connect flow-meter (for instance "OV-DMC 2", item no.
1069177) and measure differential pressure or temperature.
Differential pressure
measurement: Connect red measuring hose (high pressure)
to
drive
the
valve
to
full
to the measuring adapter (service tool
1090551) and blue measuring hose (low
pressure) to the pressure test point (+) (see
illustr. 6).
flow
if
the
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