VIESMANN Heating mixers and mixer motors - Viessmann · Heating mixer-4– dual mixing for boilers...

Heating mixers

Heating mixer-4, DN 20 to DN 50, and R ¾" to R 1¼"Special heating mixer-4, R ½" to R 1"Heating mixer-3, DN 20 to DN 100Special heating mixer-3, R ½" to R 1"

Mixer motors

For fitting to a heating mixer

VIESMANN

DatasheetPart numbers and prices: see pricelist

Heating mixers and mixer motors

5822 077–6 GB 4/2008

Heating mixer-4 – dual mixing for boilers and heating circuits

Heating mixer-4 – weld fitting

Int. dia. aDN mm20 15025 15032 17040 18050 210

& With four connections;mixes in the heating flow and boiler return directions

& In conjunction with heating circuits, connect directly to thereturn line

& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 120 °C& To DIN 3336& Shaft and separators made from stainless steel, internal compo-nents made from copper alloy

& Direct welding& Replacement of the shaft seals (O-ring) without draining theheating system

& For sizing, see diagram on page 4.

Heating mixer-4 – threaded fitting

Connection aR mm¾" 1901" 1901¼" 214

& With four connections;mixes in the heating flow and boiler return directions

& In conjunction with heating circuits, connect directly to thereturn line

& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 120 °C& To DIN 3336& Shaft and separators made from stainless steel, internal compo-nents made from copper alloy

& with threaded fitting (R ¾" to 1¼")& Replacement of the shaft seals (O-ring) without draining theheating system


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2 VIESMANN Heating mixers and mixer motors

Product description

Special heating mixer-4 – also for underfloor heating systems

Mixer with compression fitting insertsConnection aR mm½" 168¾" 1871" 209

Mixer with soldered internal componentsConnection Internal Ø aR mm mm½" 15 152½" 18 148¾" 22 1621" 28 191

& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 120 °C& To DIN 3336& Low leakage rate and corrosion-resistant when using perme-able plastic pipes (to DIN 4726) in conjunction with systemseparation

& Housing and rotary damper made from brass, cast shaft madefrom stainless steel

& Low leakage rate through close fit& Replacement of the shaft seals (O-ring) without draining theheating system

& Compression or solder fitting inserts& For sizing, see diagram on page 4.Observe the technical guide "Control of underfloor heating sys-tems".

Mixer curve

A Boiler flowB Boiler return

C Heating flowD Heating return

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Heating mixers and mixer motors VIESMANN 3

Heating mixer-4 – dual mixing for boilers and heating circuits (cont.)

Calculating the internal diameter and pressure drop

Int. dia.DN

ConnectionR

kvs valuem3/h

max. Δpv100

– ½" 3.8 See shaded sizing area in the diagram20 ¾" 6.925 1" 10.532 1¼" 18.540 – 28.550 – 42.0

Heating mixer-3 – one-way mixing for heating circuits

Heating mixer-3 – DN 20 to DN 50

Int. dia. a bDN mm mm20 150 12325 150 12332 170 14240 180 15450 210 177

& For vertical installation& With 3 connections, mixes only in the heating flow direction& Heating return optionally on the l.h. or r.h. side& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 120 °C& To DIN 3336& Shaft and separators made from stainless steel, internal compo-nents made from copper alloy

& Direct welding& Replacement of the shaft seals (O-ring) without draining theheating system


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Heating mixer-4 – dual mixing for boilers and heating circuits (cont.)

Special heating mixer-3 – also for underfloor heating systems – R 1/2" to R 1"

Mixer with compression fitting insertsConnection a bR mm mm½" 168 120¾" 187 1361" 209 151

Mixer with soldered internal componentsConnection Internal Ø a bR mm mm mm½" 15 152 111½" 18 148 109¾" 22 162 1211" 28 191 140

& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 120 °C& To DIN 3336& Low leakage rate and corrosion-resistant when using perme-able plastic pipes (to DIN 4726) in conjunction with systemseparation

& Housing and rotary damper made from brass, cast shaft madefrom stainless steel

& Low leakage rate through close fit& Replacement of the shaft seals (O-ring) without draining theheating system

& Compression or solder fitting inserts& For sizing, see diagram on page 6. Observe the technical guide"Control of underfloor heating systems".

Mixer curve

A Boiler flowB Heating flowC Heating return

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Heating mixer-3 – one-way mixing for heating circuits (cont.)

Calculating the internal diameter and pressure drop

Int. dia.DN

ConnectionR

kvs valuem3/h

max. Δpv100

– ½" 3.8 see shaded sizing area in the diagram20 ¾" 6.925 1" 10.532 – 18.540 – 28.550 – 42.0

Heating mixer-3 – DN 40 and DN 50

Int. dia. a b WeightDN mm mm kg40 96 56 6.050 103 63 6.5

& With PN 6 flanges& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 110 °C& Flange connections to ISO 7005& Casing: Cast iron GG 20– Shaft: stainless steel– Rotary damper: Hot-pressed brass

& Leakage max. 0.1 % of kvs value& With manual control lever& Flow and bypass curve: Linear

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Heating mixer-3 – DN 65 to DN 100

Int. dia. a b c WeightDN mm mm mm kg65 200 100 43 9.580 230 115 52 14.5100 260 130 68 18.3

& With PN 6 flanges& Permiss. operating pressure: 6 bar (PN 6)& Permissible flow temperature: 110 °C& Flange connections to ISO 7005& Casing: Cast iron GG 20– Shaft: stainless steel– Rotary damper: Hot-pressed brass

& Leakage max. 0.1 % of kvs value& Flow and bypass curve: Linear

Calculating the internal diameter and pressure drop for ΔT = 20 K

Pressure drops below 40 mbar should be avoided; in these casesuse the next smallest mixer.

Pressure dropA = 100 mbarB = 80 mbarC = 60 mbarD = 40 mbarE = 20 mbar

Int. dia.DN

kvs valuem3/h

max. Δpv100

mbarkvs/kvR

40 25 300 > 10050 40 300 > 10065 63 300 > 10080 100 300 > 100100 160 300 > 100

Example:

Heating circuit output: 280 kWTemperature differential(Heating water) ΔT: 20 KMixer: DN 50Pressure drop: ≈ 80 mbar

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For other temperature differentials (ΔTnew), the required internaldiameter of the mixer and the pressure drop can be determinedvia the calculated output(²new) at a constant mass flow rate:

Heating circuit output: 224 kWMixer: DN 50Pressure drop: ≈ 60 mbar

Mixer motors

For heating mixer DN 20 to 50 and R ½" to 1¼"

Part no. 7450 657 & Single-phase synchronous motor with gearbox and 2 limitswitches; reversible rotation

& Order plug-in connector gS for mixer motor and plug-in connec-tor sÖ for heating circuit pump separately (see control unitaccessories).

Rated voltage: 230 V~Rated frequency: 50 HzPower consumption: 4 WProtection: IP 42 to EN 60529; safeguard

through appropriate design andinstallation

Permissible ambient temp.during operation: 0 to +40 °Cduring storage andtransport: -20 to +65 °CTorque: 3 NmRuntime for 90° ∢: 120 s

For heating mixer-3 with flanges DN 40 and 50

Part no. 9522 487 & Single-phase synchronous motor with gearbox and 2 limitswitches; reversible rotation

& With manual adjusting button and switch for automatic or man-ual operation




Permissible ambient temp.during operation: -15 to +50 °Cduring storage andtransport: -30 to +65 °CTorque: 5 NmRuntime for 90° ∢: 135 s

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For heating mixer-3 with flanges DN 65 to 100

Part no. Z004 344 & Single-phase synchronous motor with gearbox and 2 limitswitches; reversible rotation

& With manual adjusting button and switch for automatic or man-ual operation




Permissible ambient temp.during operation: -15 to +50 °Cduring storage andtransport: -30 to +65 °CTorque: 12 NmRuntime for 90° ∢: 125 s

Installation examples

Connections between the boiler and the safety equipment toEN 12828 must not be able to be shut off.Therefore when installing mixers-4 install special safety flow andreturn pipes.For this, Viessmann boilers offer separate connections.The heating circuit pumps should be installed in the flow lines ofthe heating circuit downstream of the mixer. The pump pressuredoes not affect the mixer for closed mixers, but is reduced in thesystem.

Capturing the temperature when using plastic pipesFor plastic pipes the temperature should be captured by the flowtemperature sensor, which must be fitted downstream of the heat-ing circuit pump on a metal pipe.

Use of special heating mixers in underfloor heating systemssee the technical guide "Control of underfloor heating systems".

Boiler with a heating circuit with mixer-4

A Air vent valveB Pressure gauge

C Safety valveD Spring-loaded check valveE Heating circuit pumpF Heating circuitG Mixer-4 with mixer motor or heating circuit control unitH DrainK Expansion vessel

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Mixer motors (cont.)

Boiler with two heating circuits with mixer-4

A Air vent valveB Pressure gaugeC Safety valveD Spring-loaded check valveE Heating circuit pumpF Heating circuitG Mixer-4 with mixer motor or heating circuit control unit

H Special heating mixer-4 with mixer motor or heating circuitcontrol unit

K DrainL Expansion vesselM Underfloor heating circuitN Temperature limiter (maximum limit)O BypassP Butterfly valve bypass

Heating group control with mixer-3

A Mixer-3B Heating circuit pumpC Spring-loaded check valve

D Heating circuitE Flow distributorF Return collector

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Installation examples (cont.)

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Viessmann Werke GmbH&Co KGD-35107 AllendorfTelephone: +49 6452 70-0Fax: +49 6452 70-2780www.viessmann.com

Subject to technical modifications.

Viessmann LimitedHortonwood 30, TelfordShropshire, TF1 7YP, GBTelephone: +44 1952 675000Fax: +44 1952 675040E-mail: [email protected] 5

822077–6GB

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VIESMANN Heating mixers and mixer motors - Viessmann · Heating mixer-4– dual mixing for boilers...

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