Honeywell V2880 PRODUCT DATA

V2880, Therafix Design

Thera Design Edition - H-Block with TRV Insert

WITH HIGH QUALITY SURFACE FOR DESIGN RADIATORS

PRODUCT DATA

Application

The Thera Design Edition is particularly styled for use with de­sign radiators. With their high class appearance they perfectly
fit to all kinds of ambients.
The Therafix Design is used to connect design radiators with

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Angle right

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Angle left

50 mm connection distance to 2-pipe hydronic heating sy­stems. Therafix Design is equipped with a pre-settable TRV in­sert in the supply, a pre-settable lockshield insert in the return
and an M30 x 1.5 thermostat thread.
H-Blocks of this type have quiet operation and are fitted to the

50mm connection on 2-pipe systems with medium flow rates.

The valve insert can be replaced while the system is running
and without draining using the service tool (see ‘Accessories’).

H-Blocks of this type are suitable for

• Honeywell radiator thermostats with M30 x 1.5 connection
and from an optical aspect especially the Thera-4 Design
series

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Straight

Design

The Therafix design H-Block consist of:

• Valve housing PN10, DN15 with

• external thread connection on inlet

• external thread connection with union-nut and radiator tail­piece on outlet

• Pre-settable valve insert

• Protection cap

Materials

• Valve housing made of brass with chrome or white (RAL

9016) surface

• Valve insert made of brass with EPDM O-rings and soft seals
and stainless steel spindle

• Protection cap made of plastic

• Union-nut and tailpiece made of chrome plated brass with
EPDM O-ring

Features

• For radiators with 1/2" internal thread

• Perfect finishing with high quality surface in chrome or
white (RAL9016)

• Varius versions in angle and straight available to fit a
visual appealing installation

• Including a chromed tail piece with integrated O-ring

• Functions: control, pre-setting, shut-off

• For 2-pipe systems

• Standard M30 x 1.5 thermostat connection

• Connections for all types of pipework available

Specifications

Medium Water or glycol-water mixture,

quality to VDI 2035

pH-value 8…9,5

Operating temperature 2...130°C (36...266°F)

Operating pressure PN10

Differential pressure max. 1 bar (14.5 psi) –

max. 0.2 bar (2.9 psi) recommended
for quiet operation

Thermostat connection M30 x 1.5

Closing dimension 11.5 mm

Stroke 2.5 mm

Connection distance 50 mm

Honeywell y Subject to change EN0H-2110GE25 R0708

THERA DESIGN EDITION - H-BLOCK WITH TRV INSERT

Function

The Therafix Design connects individual radiators to the
heating loop. Together with a radiator thermostat, e.g. Thera-4
Design (not supplied with the valve) the Therafix Design
controls the amount of heating water flowing through the radi­ator depending on the ambient room temperature. When the
temperature increases the sensor inside the thermostat ex­pands and acts onto the valve spindle of the thermostatic insert
of the Therafix Design. The valve is closed and the flow through
the radiator is throttled. When the room temperature decreases
the sensor contracts and the spring-loaded thermostatic insert
opens again – more heating water can flow through the radi­ator.

The radiator is pre-settable with shut-off over the lockshield
insert integrated into the return of the valve. Pre-setting allows
throttling the flow through a radiator to realize a hydronic
balance. The shut-off function separates the radiator from the
heating loop, e.g. for removal.

Please Note:

• To avoid stone deposit and corrosion the composition of the
medium should conform with VDI-Guideline 2035

• Additives have to be suitable for EPDM sealings

• System has to be flushed thoroughly before initial operation
with all valves fully open

• Any complaints or costs resulting from non-compliance with
above rules will not be accepted by Honeywell

• Please contact us if you should have any special require­ments or needs

Pre-setting

The TRV is open by factory setting. Pre-setting is done by first
closing the valve insert (head black with pre-setting-figure 0-9)
on top of the valve body 2 turns right and then opening to the
pre-setting-figure derived from the flow diagram.

NOTE: One complete turn refers to pre-setting-figure 10,

2 complete turns to pre-setting-figure 20 and so on.

Another possiblility to preset the TRV is to open the lockshield
insert in the return to the pre-setting-figure derived from the
flow diagram of lockshield insert.

NOTE: Factory setting of lockshield insert is closed.

Application Examples

Fig. 1. Straight version Fig. 2. Angle version

EN0H-2110GE25 R0708 2 Honeywell y Subject to change