REMKO DN 25 User Manual

REMKO

3-WAY SWITCHING VALVE DN 25

Operation · Technology

Edition D-W10

REMKO THREE-WAY SWITCHING VALVE

Safety instructions

Carefully read the operating manual be­fore placing the unit in service for the first
time. It contains useful tips and notes
such as hazard warnings to prevent
injury and material damage. Failure to
follow the directions in this manual can
result in endangerment to persons, the
environment and the equipment itself
and will void any claims for liability.

■ Keep this manual in the vicinity of the

units.

■ The units and components should be

set up and installed only by qualified
personnel.

■ The set-up, connection, and opera-

tion of the unit and its components
must be in accordance with the
operating conditions stipulated in this
manual and comply with all applicable
local regulations.

■ Modification of units and components

supplied by REMKO is not permitted
and can cause malfunctions.

■ Units and components may not be

operated in areas where there is an
increased risk of damage. Observe
the minimum clearances.

■ The electrical supply is to be adapted

to the requirements of the units.

■ The operational safety of units and

components is only assured if they are
fully assembled and used as intended.
Safety devices may not be modified
or bypassed.

■ Do not operate units or components

with obvious defects or signs of dam­age.

■ The units and components must be

kept at a safe distance from inflam­mable, explosive, combustible,
aggressive and dirty areas or atmos­pheres.

■ Installation, repair and maintenance

work may be carried out only by au­thorised specialists. Visual inspections
and cleaning can be performed by the
operator as long as power is discon­nected from the equipment.

■ To preclude any danger from the unit,

take appropriate hazard-prevention
measures when performing installa­tion, repair or maintenance work or
cleaning the units.

2

Environmental pro­tection and recycling

Disposing of packaging

All products are packed for transport
in environmentally friendly materials.
You can make a valuable contribution
to reducing waste and sustaining raw
materials by only disposing of packaging
at approved collection points.

Disposal of
components

The manufacturing process for the

units is subject to continuous qual­ity control. Only high-grade materials are
processed, the majority of which
are recyclable. You can also
contribute to environmental protec­tion by only disposing of components
in accordance with local regulations and
in an environmentally safe manner, e.g.
through authorised disposal and recycling
specialists or at collection
points.

Description

The three-way switching valve controls
the flow of domestic water or a separate
cooling circuit (four pipe system).

It is comprised of an electrical actuator
and a hydraulic lower section.

Due to its shape, the installed cylindrical
gate valve allows the medium to be re­directed in a way which is not depend­ent on the differential pressure.
This gate valve is controlled by an ac­tuator.
The gate valve can also be operated
manually via a lever located on the plas­tic housing.
This makes it possible to also operate
the three-way switching valve by hand,
without the electric motor.

The housing consists of corrosion-resist­ant gunmetal (bronze).

The connections have a 1" external
thread on both the inlet and outlet
sides.

Warranty

The warranty conditions are listed in the
"General terms and conditions".
Please contact your contractual partner
in the first instance.

This operating manual is a translation of the German original, Version W-10

3

REMKO THREE-WAY SWITCHING VALVE

Operation

Mode of operation

All the moving parts and all valve gaskets
are incorporated into a cartridge.
The outer surface of the piston has O­rings which guarantee that the paths are
hermetically sealed.

If the valve rod is down, flow path B is
blocked, and the flow passes through the
openings of the cylindrical gate valve,
taking the route "A" and "AB".
If, on the other hand, the valve rod is up
(outlet position), then flow path "A" is
blocked and the flow takes the route "B"
and "AB".

Switching between the two flow
directions takes approx. 6 seconds.

Control of the flow direction

Valve pin down
Flow direction: A<->AB

Manual adjustment of the lever (attached
to the side of the actuator) is only pos­sible if it is pointing up.
If this is the case, push it firmly down and
inwards until it engages in the central
position. In this position, the three-way
switching valve is opened in flow direc­tion "A" to "B" (and vice-versa). Manual
actuation of the valve is useful when
the line system is being refilled, drained
or bled, but also if the electric motor is
no longer functional (e.g. due to power
failure).
By gently pushing and pulling the lever, it
is possible to move the valve back into its
original "locked position".
When the three-way switching valve is
reconnected to the power supply after
a power cut, the actuator and the valve
return to the automatic position.

Valve pin up (outlet position)
Flow direction: B<->AB

A

AB

4

B

A

AB

B

Installation

NOTE

Installation may only be performed
by authorised specialists.

NOTE

Do not use any boiler accessories,
soldering material or wet materi­als of a mineral oil basis, or which
contain mineral oil, hydrocarbon or
ethylene glycol acetate.
If diluted with at least 50% water,
diethylene glycol, ethylene glycol
and propylene glycol can be used
(anti-freeze agent).

Installation

The unit can be installed basically inde­pendent of position. However, wherever
possible, the actuator should not be
installed upside down.

■ Slide the lever into the "Open flow"

position, so that the system can first
be flushed.

If the flow of water is to be redirected, in­stall the system such that the flow enters
through valve opening "AB" and exits
through valve opening "A" or "B".

In mixed systems, install the three-way
switching valve such that the water
enters through valve opening "A" or "B"
and exits through valve opening "AB".

■ Fit the three-way switching valve

right to the pipe itself.

■ During installation of the pipes, do

not grasp or hang on to the actuator.

■ Remove the actuator with the protec-

tive cover. This will simplify installa­tion.

■ Allow for approx. 25 mm of space so

the servo motor can be reinstalled.

! CAUTION

All connections must be made with
the unit in a de-energised state
(electrical system).

■ Steady the three-way switching valve

with your hand and tighten the pipe
connection with an open-ended
spanner or steady the valve with an
open-ended spanner and tighten the
pipe connection with an adjustable
spanner
(see diagrams on following page).

5

REMKO THREE-WAY SWITCHING VALVE

Installing the three-way switching
valve

Replacing the actuator

When replacing the actuator, it is not
necessary to drain all the water from the
system, as the valve together with the
cartridge remain in the pipe during the
process.

! CAUTION

The replacement of the actuator must
take place in a de-energised state
(electrical system). Also disconnect
the main connection to the actuator.

To replace the actuator, proceed as fol­lows:

1. Press the latching mechanism, which
is located right under the lever,
upwards with your thumb (the head
of the actuator is automatically en­gaged into the valve body).

NOTE

If clamping the three-way switch­ing valve, you must ensure that the
raised "H" logo attached to the
valve body is not clamped between
the jaws! Otherwise there is a risk
that the valve will be deformed by
clamping, thus becoming unusable.

6

2. At the same time, gently push the
actuator downwards by hand and
turn it anticlockwise through approx.
45 degrees.

3. Lift the actuator out of the valve
body.

4. Fit the replacement actuator. To do
this, proceed in the opposite order to
removal.

Please note that if the actuator is to be
installed at a right angle to the valve
body, the latching mechanism with not
work.

NOTE

Installation may only be performed
by authorised specialists.

Electrical connection

Removing the servo motor

! CAUTION

All electrical installation work is to
be performed by specialist compa­nies. Disconnect the power supply
when connecting the electrical ter­minals.

Mode of operation

The three-way switching valve is actu­ated externally via a single pole.
If there is a demand for hot water, the
control system closes the N contact,
which supplies the relay, which then in
turn closes the NO contact (microswitch
C3).
This closes path "B" and opens path
"A".

When path "A" is fully open, this closes
the cams of microswitch C1 and opens
microswitch C2.
At the end of the demand for hot water,
the N contact is opened by the control
system, meaning that the supply to the
relay stops and the NC contact (micros­witch C3) is closed.
This closes path "A" and opens path
"B".
As soon as path "A" is fully closed, the
cams close microswitch C2 and open
microswitch C1. The three-way switch­ing valve is ready for the next period of
hot water demand.

7

REMKO THREE-WAY SWITCHING VALVE

M
1~

Wärme-
pumpen-
manager
(

I/O-Platine)

A3

26

L

N

schwarz

braun

grau

X1.1

X1.19

X1.20

M
1~

Wärme-
pumpen-
manager
(

I/O-Platine)

A3

26

L

N

schwarz

braun

grau

X2.21

X2.28

X2.29

Verwendung als Umschaltventil Brauchwarmwasser CMF/CMT 120/160

Electrical circuit diagram and connection diagram for usage
as a domestic water system

CMF / CMT 80,90,100,150

Circuit board
WP-manager
(I/O circuit
board)

CMF / CMT 120 / 160

brown

black

gray

Circuit board
WP-manager
(I/O circuit
board)

brown

black

gray

8

We reserve the right to modify the dimensions and constructional design as part of the ongoing

technical development process.

M
1~

Wärme-
pumpen-
manager
(

I/O-Platine)

A3

26

L

N

schwarz

braun

grau

X1.1

X1.19

X1.20

M
1~

Wärme­pumpen-
manager
(

I/O-Platine)

A10

39

L

N

schwarz

braun

grau

X1.1

X1.34

X1.35

M
1~

Wärme-
pumpen-
manager
(

I/O-Platine)

A3

26

L

N

schwarz

braun

grau

X2.21

X2.28

X2.29

M
1~

Wärme-
pumpen-
manager
(

I/O-Platine)

A10

26

L

N

schwarz

braun

grau

X2.20

X2.31

X2.32

Verwendung als Umschaltventil Kühlen CMF/CMT 120/160

Verwendung als Umschaltventil Brauchwarmwasser CMF/CMT 120/160

Electrical circuit diagram and connection diagram for usage
as a cold water switching valve

CMF / CMT 90, 100,150

CMF / CMT 120 / 160

Circuit board
WP-manager
(I/O circuit
board)

brown

black

gray

Circuit board
WP-manager
(I/O circuit
board)

brown

black

gray

We reserve the right to modify the dimensions and constructional design as part of the ongoing

technical development process.

9

REMKO THREE-WAY SWITCHING VALVE

Unit dimensions

1 inch three-way switching valve

94

90

136

94

All dimensions are given in mm

We reserve the right to modify the dimensions and constructional design as part of the ongoing techni-

cal development process.

68

10

Technical data

Unit type

Cvs value (pressure loss 1 bar) m3/h 8

Nominal pressure bar 10

Max. differential pressure kPa

Switching time s 6

Medium connectors Inches (") 1

Electrical connection V 220-240/1~N

Frequency Hz 50-60

Power consumption W 4

Current capacity of the auxiliary contacts A/V 3/250

Connection line length mm 1000

Permissible ambient temperatures C° 0-65

Min./max. heating water temperatures C° 1-95

Nominal diameter DN 25

EDP no. 260070

We reserve the right to modify the dimensions and constructional design as part of the ongoing

technical development process.

2

Three-way switching

valve

400

Spare parts list

No. Description EDP no.

1 Actuator for three-way switching valve 1120054

2 Hydraulic lower section, 1" 1120002

3 Valve core for three-way valve 1120001

11

REMKO INTERNATIONAL

...and right in your own location too!
Benefit from our experience and advice

REMKO GmbH & Co. KG
Air conditioning and heating technology

Im Seelenkamp 12 D-32791 Lage
Postfach 1827 D-32777 Lage
Telephone [phone]
Fax [phone]
e-mail [e-mail]
Website www.remko.de

We reserve the right to make technical changes, and provide no warranty as to the accuracy of this data!