S+S 1201-1011-1001-020 Operating Instructions, Mounting & Installation Download Page 6

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HYGRASREG

Rev. 2017 - V15 GB

Patented quality product (pro-dynamic cross convection patent no. DE 10 2012 015 726.6)

The dew point control switch

HYGRASREG

is installed on cooling ⁄ cold-water piping or on cooled surfaces. It reliably detects formation of dew

by means of its humidity and temperature sensor (no conductivity measurement) and, thanks to its patented measuring method,

pro-dynamic cross

convection

, yields an exact measurement result (with LED status display),

with ⁄ without display

. Dew point temperature is that temperature at

which air reaches the state of saturation and water vapour starts to condensate. Facilitated by the continuous measuring range from 0...100 % r.H.
of the

TW-U

and the adjustable switchpoint for the

TW-W

of 75...100 % r.H., it is possible to operate cooling ceilings, for example, so that the

switching output of the dew point control switch, the DDC, is activated and then triggers a heater or other control elements, thereby preventing the
formation of dew on pipes or cooling ceilings or on the property to be monitored.

TECHNICAL DATA

Power supply:

24 V AC (± 20 %) and 15...36 V DC

Power consumption:

< 1.1 VA ⁄ 24 V DC; < 2.2 VA ⁄ 24 V AC

Measuring Range:

formation of dew is detected at
0...100 % r.H. on the

TW-U

, continuous

75...100 % r.H. on the

TW-W

, switching

(switchpoint adjustable by potentiometer, factory setting 75 % r.H.)

Sensors:

digital humidity sensor with integrated temperature sensor,

small hysteresis, high long-term stability

Sensor protection:

membrane filter

Output signal:

0 -10 V or potential-free changeover contact (24 V), 1 A ohmic load

Process connection:

endless metal strap with metal tightener, 300 mm, for pipes up to 3 " diameter
(included in the scope of delivery)

Electrical connection:

0.14 - 1.5 mm², via terminal screws

Enclosure:

plastic, material polyamide, 30 % glass-globe-reinforced,
with quick-locking screws (slotted ⁄ Phillips head combination),
colour traffic white (similar to RAL 9016), enclosure cover is transparent!

Enclosure dimensions:

72 x 64 x 43.3 mm (Tyr 1)

Cable gland:

M 16 x 1.5, including strain relief, exchangeable, max. inner diameter 10.4 mm

Mounting:

with strap for direct mounting on pipes or

for direct mounting on flat surfaces (e.g. walls, ceilings)

TW - external

with detached sensor head (cable length KL = 1.5 m) for mounting on pipes

Protection class:

III (according to EN 60 730)

Protection type:

IP 65 (according to EN 60 529)

Standards:

CE conformity, electromagnetic compatibility according to EN 61 326, EMC directive 2014 ⁄ 30 ⁄ EU

Optional:

two-line

display with illumination,

cutout approx. 36 x15 mm (W x H),

for displaying actual humidity and the switching status of the relay

FUNCTION

The relay output is triggered (contact 13 -11 closed) if the

pre-set switchpoint

(factory setting 75 % r.H.)

is not reached and opens (contact 12 -11 closed) in the event of an error (power failure, condensation).

LED short pulses =

relay active → switchpoint not reached
ACTUAL humidity

< pre-set switchpoint (no condensation)

LED long pulses =

relay inactive → switchpoint exceeded
ACTUAL humidity

> pre-set switchpoint (condensation)

13 11 12

HYGRASREG

– Dew point control switches including strap (± 3 %), Deluxe

HYGRASREG

TW - external

– Dew point control switches with detached sensor head (± 3 %), Deluxe

Type ⁄ WG01

Measuring Range

Humidity

Output

Humidity

Mounting Display Item No.

Sensor internal

T W-W

75...100 % r. H.

Changeover contact