• Valve housing in straight pattern with internal threads to ISO 7
(DIN 2999) or external threads according to DIN ISO 228
•Valve insert
• Handwheel with digital display of pre-setting
• Thermal actuator (accessory)
• Pipe connections (accessory)
Materials
• Valve housing made of red bronze
•Valve insert made of red bronze and brass
•EPDM O-rings
• PTFE seat sealing
• Handwheel, pre-setting dial and display made of plastic,
orange
V1810
Alwa-Kombi-4
Circulation throttle valve
Product specification sheet
Application
The Alwa-Kombi-4 is used as throttle valve for hydronic balancing
of warm potable water circulation systems.
To achieve a hydronic balance the flow in the circulation pipe is
throttled by manually pre-setting the valve. The valve can also be
equipped with a thermal actuator which allows a regulation of the
water temperature in the circulation system to the exact degree.
The thermal actuator can be installed without interruption of the
warm water supply.
When the thermal actuator 50 - 60 °C (122 - 140 °F) is used, a
thermal disinfection according to DVGW worksheet W551 and
W553 is supported. Hydronic balance is also retained during the
thermal disinfection process to ensure disinfection of all pipelines
and risers.
Special Features
• Meets KTW requirements
• For regulation according to DVGW worksheets W551 and
W553
• Valve housing and all parts with flow-contact made of corrosion-resistant red bronze
• Retrofittable automatic temperature-control with support of
thermal disinfection
• Draining option with retrofittable and removable draining
adapter
• No additional side connections to valve housing
• Cavity-free cartridge with maintenance-free spindle sealing
• Spindle thread is isolated from the flow
• Seat sealing made of PTFE
• Visible, digital pre-setting dial with concealed pre-setting
handwheel
• High accuracy due to factory calibration to every single valve
Technical Data
MediumWater
Operating temperature max. 130 °C
Operating pressuremax. 16 bar
k
-valueDN 15
vs
DN 20
DN 25
DN 32 und DN 40
2.7
6.4
6.8
16.0
EN0H-1805GE23 R0307 • Subject to change
www.honeywell.com1
V1810 Alwa-Kombi-4
Method of Operation
As throttle valve the Alwa-Kombi-4 limits the flow through the
circulation pipe. This is achieved either by manually closing the
valve to a certain position or automatically, when the valve is
equipped with a thermal actuator.
Manual pre-setting: the valve is pre-set according to a calculated
value and stays in that position. The flow of the water is limited
by the narrowed valve opening.
Automatic regulation: the valve is equipped with a thermal
actuator and pre-set to the desired water temperature. The
thermal actuator holds the water temperature at the valve to the
exact degree.
When the water temperature falls the valve opens and the flow of
warm water increases. When the water temperature rises, the
valve closes and shuts-off when the pre-set water temperature is
reached (except for a leakage rate).
With manual pre-setting the valve can only be set for optimal
operation under „full load“. The automatic regulation process
allows a permanent regulation and by that an optimal supply of
all pipelines under most economical energy use.
As part of Honeywell´s "Kombi“ family of valves, additional
functions can also be fitted and used after the valve has been
installed. The functions are carried out by installing adapters into
the cartridge spindle:
• The thermal actuator (preferably 50 - 60 °C [122 - 140 °F])
can be installed at any time without interrupting the supply of
warm water. The actuator is simply screwed into the spindle
and allows permanent hydronic balancing based on the
water temperature in the circulation pipe.
• The draining adapter is fitted to drain a pipe or riser and can
be removed when the draining process is finished. It can be
used with any Alwa-Kombi-4 potable water balancing valve
and also with any Honeywell Kombi-3-plus heating/cooling
balancing valve.
• The current temperature in the circulation line can be read on
the thermometer at any time. The thermometer can be used
for variants both with and without a temperature-controlled
actuator.
• The sampling valve is used in conjunction with the drain
adapter and is used to determine chemical and microbiological parameters.
Thermal disinfection at temperatures over 70 °C (158 °F)
Supported by Alwa-Kombi-4 with fitted thermal actuator
50 - 60 °C (122 - 140 °F)
Starting from the leakage rate the valve opens at a water temperature of 63 °C (145 °F) and the flow rate increases.
When the water reaches a temperature of 72 °C (162 °F) the flow
of the water is throttled to a flow rate below the leakage rate. This
has the advantage that the hydronic balance is retained and the
hot water is repily distributed in all risers and pipelines.
When the thermal disinfection process is finished and the water
temperature drops again, Alwa-Kombi-4 returns to the standard
control position..
Desinfection
range
72°C
(162°F)
Flow rate
Control
range
63°C (145°F)
Water temperature
Fig.1 Relation of flow rate and water temperature
Note: The thermal disinfection id only supported by the thermal
actuator 50 - 60 °C (122 - 140 °F), OS-No. VA2400A002.
The thermal actuator has to be set to 55 °C (131 °F) =
pre-setting 1.5.
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EN0H-1805GE23 R0307 • Subject to change
Dimensions
Hose connection G3/4"
Thernal actuator
Draining adapter
Tamper-proof cap
H1 (open)
2 space required for installation of accessories
H
Fig.2 Alwa-Kombi-4 with internal threadsFig.3 Alwa-Kombi-4 with external threads
Note: Draining adapter and thermal actuator available, see accessories.
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
EN0H-1805GE23 R0307 • Subject to change
Pressure loss in Pa
www.honeywell.com9
V1810 Alwa-Kombi-4
Alwa-Kombi-4 with installed thermal actuator
k
-value of Alwa-Kombi-4 with installed thermal actuator
vs
50 - 60 °C (122 - 140 °F) in relation to water temperature at
pre-setting 1.5
kv-value
Water temperature
DN 20 and DN 25
kv-value
Pre-setting values for thermal actuators
We recommend:
Pre-setting value =desired minimal temperature
(standard setting)
Desired minimal temperature
55 °C (131 °F) = Pre-setting 1.5
If the required throttle position according to DVGW worksheet
W553 is to the right of the 2K-line (tempreature in pipe is below
53°C [127°F] at pre-setting 1.5) the pre-setting has to be
increased by 2K:
Desired minimal temperature
55 °C (131 °F) + 2K = Pre-setting 1.7
If the required throttle position according to W553 is to the right
of the 5K-line (temperature in pipe is below 53 °C [127 °F] at presetting 1.7) the following possibilities are left:
• Manually pre-set thermal actuator and valve with values
calculated according to DVGW worksheet W553.
• Use valve of larger dimension.
• Increase pre-setting by 5K:
55 °C (131 °F) + 5K = pre-setting 2.0
The increased pressure loss over the valve must be taken into
account when the pump is specified!
When installation is set according to above recommendations
the hydronic balance is also retained at 70 °C (158 °F) - during
the thermal disinfection process.
Water temperature
DN 32 and DN 40
kv-value
Water temperature
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EN0H-1805GE23 R0307 • Subject to change
Flow Diagram for DN 15 with thermal actuator 50 - 60 °C
V1810 Alwa-Kombi-4
Control deviation
Pressure loss in mbar
Flow in kg/h
Throttle position according to calculation example 3 of DVGW worksheet W553 (multi storey building with 48 flats)
v = 0,5 m/s with pipe-ø 15 x 1 mm
Pre-setting1.01.11.21.31.41.51.61.71.81.92.0
Temperature °C5051525354555657585960
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
EN0H-1805GE23 R0307 • Subject to change
Pressure loss in Pa
www.honeywell.com11
V1810 Alwa-Kombi-4
Flow Diagram for DN 20 and DN 25 with thermal actuator 50 - 60 °C
Control deviation
Pressure loss in mbar
Flow in kg/h
Throttle position according to calculation example 3 of DVGW worksheet W553 (multi storey building with 48 flats)
v = 0,5m/s with pipe-ø 22 x 1 mm
v = 0,5m/s with pipe-ø 28 x 1 mm
Pressure loss in Pa
Pre-setting1.01.11.21.31.41.51.61.71.81.92.0
Temperature °C5051525354555657585960
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
EN0H-1805GE23 R0307 • Subject to change
12www.honeywell.com
Flow Diagram for DN 32 and DN 40 with thermal actuator 50 - 60 °C
V1810 Alwa-Kombi-4
Control deviation
Pressure loss in mbar
Flow in kg/h
Throttle position according to calculation example 3 of DVGW worksheet W553 (multi storey building with 48 flats)
v = 0,5m/s with pipe-ø 35 x 1 mm
Pre-setting1.01.11.21.31.41.51.61.71.81.92,0
Temperature °C5051525354555657585960
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
EN0H-1805GE23 R0307 • Subject to change
Pressure loss in Pa
www.honeywell.com13
V1810 Alwa-Kombi-4
Flow Diagram for DN 15 with thermal actuator 40 - 65 °C
Control deviation
Pressure loss in mbar
Flow in kg/h
Throttle position according to calculation example 3 of DVGW worksheet W553 (multi storey building with 48 flats)
v = 0,5m/s with pipe-ø 15 x 1 mm
Pre-setting0.50.71.01.21.52,0
Temperature °C404550556065
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
Pressure loss in Pa
EN0H-1805GE23 R0307 • Subject to change
14www.honeywell.com
Flow Diagram for DN 20 and DN 25 with thermal actuator 40 - 65 °C
V1810 Alwa-Kombi-4
Control deviation
Pressure loss in mbar
Flow in kg/h
Throttle position according to calculation example 3 of DVGW worksheet W553 (multi storey building with 48 flats)
v = 0,5m/s with pipe-ø 22 x 1 mm
v = 0,5m/s with pipe-ø 28 x 1 mm
Pre-setting0.50.71.01.21.52,0
Temperature °C404550556065
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
EN0H-1805GE23 R0307 • Subject to change
Pressure loss in Pa
www.honeywell.com15
V1810 Alwa-Kombi-4
Flow Diagram for DN 32 and DN 40 with thermal actuator 40 - 65 °C
Control deviation
Pressure loss in mbar
Flow in kg/h
v = 0,5m/s with pipe-ø 35 x 1 mm
Throttle position according to calculation example 3 of DVGW worksheet W553 (multi storey building with 48 flats)
Pre-setting0.50.71.01.21.52,0
Temperature °C404550556065
Note: Due to manufacturing reasons the closes position (shutoff) is already reached between pre-setting 0.2 and 0.4.
Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Ecublens, Route
du Bois 37, Switzerland by its Authorised Representative Honeywell GmbH