Vector Controls B2235761 User Manual

Duct-Humidistat TDC-BH-U

Item Name

Item code

Variant

Features

TDC-BH-U-W20
TDC-BH-U-W24
TDC-BH-U-W25

40-10 0059-20
40-10 0059-24
40-10 0059-25

standard
humidifying
de-humidifying

Binary controller with:

1 Internal humidity input
1 external temperature input (For set point shift)
1 DO (Relay) for humidifier or dehumidifier
1 DO (Relay) for fan (optional)

-W20 = humidify and dehumidify

Deluxe = 7-day programmable

TDC-BH-U-D-W20
TDC-BH-U-D-W24
TDC-BH-U-D-W25

40-10 0060-20
40-10 0060-24
40-10 0060-25

Deluxe
humidifying
de-humidifying

Accessories

SOD-Tn10-1
AES3-HT-A5

40-20 0108
40-50 0104

Outdoor sensor
Replacement humidity sensor 5% accuracy

TDC-BH-U Duct-Humidistat

Features

 Control for binary humidifiers and dehumidifiers with or without fan

support.

 Low power energy consumption: < 1W per unit
 Relays switching for outputs each up to 300W
 Cost saving option with Economy functionality and set point limitations
 External sensor input for setpoint setback based on outdoor

temperature

 Password protected programmable user and control parameters

o Setpoint range limitation
o Access control for setpoints and mode change
o Access control for clock and time programs
o Select your display contents
o Selectable behavior after return from power failure

 Temperature display of external input in Celsius or Fahrenheit
Deluxe Version:

 Clock and time schedule functions
 Blue backlight for LCD

Applications

 Humidifiers:

o On / Off type humidifiers
o On / Off type humidifiers with single speed fan support

 Dehumidifiers:

o On / Off type dehumidifiers
o On / Off type dehumidifiers with single speed fan support

 Combination humidifiers and dehumidifiers without fan support

General description

The TDC-BH-U is a stand-alone electronic binary humidity stat. The TDC-BH-U features one internal humidity sensor, one
external NTC temperature sensor input and two binary outputs (Relays).

A detailed parameterization is possible with the use of a simple configuration routine. The TDC-BH-U can be configured using the
standard operation terminal. No special tools or software is required.

Ordering

Selection of devices and sensors

External temperature sensors: Use only our approved NTC sensors to achieve maximum accuracy. Recommended is SDB-Tn10­15 as duct sensor and SOA-Tn10 as outdoor sensor.

Binary auxiliary devices: E.g. humidifiers, de-humidifiers and fans. Do not directly connect devices that exceed 2(1.2)A. Observe
startup current on inductive loads!

Doc: 70-07-0124, V1.4, 20160215 © Vector Controls GmbH, Switzerland Page 1
Subject to alteration www.vectorcontrols.com

Duct-Humidistat TDC-BH-U

Power supply

Operating voltage

24 V AC/DC ± 10 %, 50…60 Hz

Power consumption

Max. 1.5 VA

Electrical connection

Terminal Connectors,

wire 0.34…2.5 mm2 (AWG 24…12)

Deluxe type only:
Power backup for real time clock

Min 48h if charged for 24h

Signal inputs

Humidity input:
Range
Accuracy

Hysteresis

Element: Polymer-Based Capacity Sensor
0…100 % r.H.
10%...90% r.H.  5.0 %
0…10% and 90…100%  7.0 %

±1% r.H.

Temperature input
Range

External NTC (Sxx-Tn10 sensor):

-40…70 °C (-40…158 °F)

Accuracy

-40…0 °C (-40…32 °F): 0.5 K

0…50 °C (32…122 °F): 0.2 K
50…70 °C (122…158 °F): 0.5 K

Signal outputs

Digital switching outputs

Switching type
AC Switching power

DO1…DO2
Relays
2(1.2) A, 250VAC (max fan power 300W)

Environment

Operation

Climatic conditions
Temperature
Humidity

To IEC 721-3-3
class 3 K5
0°C …50°C (32°F…122°F)
<95% R.H. non-condensing

Transport & storage

Climatic conditions
Temperature
Humidity
Mechanical conditions

To IEC 721-3-2 and IEC 721-3-1
class 3 K3 and class 1 K3

-25°C…70°C (-13°F…158°F)
<95% R.H. non-condensing
class 2M2

Standards

conform according to

EMC Standard 89/336/EEC
EMEI Standard 73/23/EEC

EN 61 000-6-1/ EN 61 000-6-3

Product standards

Automatic electrical controls for
household and similar use
Special requirement on humidity
dependent controls

EN 60 730 –1

EN 60 730 – 2 - 9
Degree of protection

IP30 to EN 60 529

Safety class

III (IEC 60536)

Housing

Cover, back part
Filter material

Polycarbonate PC (UL94 class V-0)
PTFE coated 1μm pores

General

Dimensions (H x W x D):

Transmitter case:
Probe:

91 x 68 x 47mm (3.7” x 2.7” x 1.9”)
14 x 77 mm ( 0.55 x 3”)

Weight (including package)

220g (7.8 oz)

76 (3.0)

47 (1.9)

91 (3.6)

68 (2.7)

Technical specification

Dimensions mm (inch)

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Duct-Humidistat TDC-BH-U

CP10

YB1 DO1

YB2 DO2

RT

CP10 = 0

Humidify

Dehumidify

Temperature input for
setback

NTC 10kΩ @ 25°C (77°F)
CP10 = 1

Humidify

CP11 = ON: FAN

CP10 = 2

If CP11 = ON: FAN

Dehumidify

0…250VAC

0V (GND)

24V AC

2

G

TDC-BH-U

1

3

Q13

7 8

B1 M

R

T

5

Q23

YB1

4

Q14

YB2

6

Q24

Installation and safety advice

Caution! This device is intended to be used for comfort applications. Where a device failure endangers human life

and/or property, it is the responsibility of the owner, designer and installer to add additional safety devices to prevent
or detect a system failure caused by such a device failure. Vector Controls or its affiliates cannot be held liable for any
damage caused by such a failure. Failure to follow specifications and local regulations may endanger life, cause
equipment damage and void warranty.

Wiring diagram

Description:

Connections depend on parameter CP10 and CP11! (See page 10)

Mechanical design and installation

The unit consists of three parts: The back part with the probe, the flange and the cover.

Mounting location

The device should be installed on the duct in an area where the air stream is well mixed:

 Locate a supply air sensor two or three meters downstream from the nearest fan and coil.
 Mount the return air sensor close to the air inlet but downstream from a return fan if one is present.

Warning about storage, packaging and usage environment

The sensing part is a polymer, which measures the humidity in the ambient air. For proper sensor operation some
mandatory precautions need to be taken during storage, packaging and usage.

The transmitter and its sensing element should not be packaged, stored or used in out-gassing plastic materials, which
could cause sensor contamination. In particular, it is recommended not to use any glue or adhesive tapes (Sellotape,
Scotch-Tape, Tesa-Film, etc.) within the package or close proximity of the sensor. Foamed materials often cause
contamination problems and should not be used to package the transmitter. Best packaging material is a simple
cardboard box or a deep-drawn plastic case in a cardboard box.

Installation

1. Drill a hole with a diameter of 16mm (5/8”) in the air duct.

2. For installation of the transmitter directly on the duct: Drill two smaller holes for the self-tapping screws

diagonal on a diameter of 92mm (3.6”).
Tip: Use the housing as marking guide for the holes.

3. For installation of the transmitter with the flange: Drill two smaller holes for the self-tapping screws diagonal

on a diameter of 60mm (2.32”). Tip: Use the flange as marking guide for the holes.

4. Open the single screw on the cover and remove cover.

5. Connect the conductors to the terminals of the back part according to wiring diagram.

6. Insert the probe in the hole; secure the back part to the duct with two self-tapping screws.

7. While in the open position, slide the two hooks of the cover into the latch at the left side of the back part.

8. Close the front part.

9. With a Philips-type screw driver of size #2, carefully tighten the front holding screw to secure the cover to the

back part. This screw is located on the front right side of the front part. There is no need to tighten the screw
too much.

Doc: 70-07-0124, V1.4, 20160215 © Vector Controls GmbH, Switzerland Page 3
Subject to alteration www.vectorcontrols.com