condair DDC-NA Dehumidification 0-10V Digital Duct Humidistat Package Instruction Manual

condair DDC-NA Dehumidification 0-10V Digital Duct Humidistat Package

Product Information

The DDC-NA Dehumidification, 0-10V Digital Duct Humidistat Package is a package that includes a 2-10V Duct Sensor and a Wall Dehum Humidistat without a sensor. It is designed to measure and control the humidity levels in air ducts. The package is installed downstream of the steam distribution at a distance 1.5 times the absorption distance, which is typically 10-12 ft or 3-3.7m.

This document covers the operation and installation instructions for the following Condair digital humidistat package:

Mounting and Installation

1509857 – Duct Sensor Installation

Location
Refer to installation overviews in section 2.
The duct sensor should be installed directly on the duct in an area where the air is well mixed with uniform flow.

• Used as supply air humidity sensor: If the sensor is used as a supply air humidity sensor it should be mounted downstream of the steam distribution at a distance 1.5 times the absorption distance (typically 10-12 ft or 3-3.7m).
• Used as return air humidity sensor: If the sensor is used as a return air humidity sensor it should be mounted close to the air inlet but downstream from a return fan if one is present.

Installation

1. At the place of location drill a hole with a diameter of 16 mm (5/8″) as well as 4 holes for the self-tapping screws into the duct.
2. Loosen the screw on the housing cover and open cover.
3. Lead connecting cable through the cable gland and connect wires to the terminate according to the wiring diagram.
4. Stick gasket on the sensor side centrally on the housing (self-adhesive).
5. Insert the probe into the hole in the duct, then fix the housing to the duct using the 4 self-tapping screws provided.
6. Close the cover and fix it with the screw (do not tighten the screw too much).
   Note: We recommend using 18-gauge wire, and maximum <100 ft distance from the unit.

2602802 – Dehum Humidistat w/o Sensor Installation

Location
Install the digital wall humidity controller in a protected and easily accessible place at last 1.5 m above the floor to the wall (mounting on flush- mounting or surface-mounting box).

Installation
Refer to installation overviews in section 2.

1. Open the screw of the housing and remove mounting plate with the connecting unit.
2. Connect wires of the connection cable to the terminals according to the wiring diagram.
3. At the place of location fix mounting plate (plastic screw facing downwards) with two screws to the flush-mounting or wall-mounting box (see dimensional drawing).
4. Carefully snap housing onto the mounting plate and fix it with the screw (do not tighten screw too much).
   Note: We recommend using 18-gauge wire, and maximum <100 ft distance from the unit.

Installation overviews

CDC-NA 2602796/1509857

DDC-NA 2602796/2602802

Dimension

CDC-NA 2602796/1509857

DDC-NA 2602796/2602802

Wall Humidistat LCD Display

Configuration
Using keypad, set specified humidity. For general health and comfort, a humidity setting of 50% is recommended.

Error Messages

• AL5 & AL7: Measured value of the external sensor fell below the lower limit of 5% RH. Check the cabling of the DDC and CDC. After eliminating the fault, acknowledge the alarm with the .
• Err2, 3 & 4: Hardware or memory problem. Replace device.

Sensor Calibration

Sensor inputs can be calibrated if needed

Setting Parameters to Configure the Controller

The control operation is defined by parameters set using the standard operation terminal. There are two levels:

• User/display parameters (password 0009)
• Control parameters (password 00241)

How to change the parameters:

User Parameters (Password 0009)
Table 1: User Parameters

0 = Switched OFF, 1 = Switched ON, 2 = state before power failure

| 0, 1, 2| 2
UP 03| Celsius or Fahrenheit: ON = Fahrenheit, OFF = Celsius| ON, OFF| OFF (Celsius)
UP 04| Select type of content for large digits (00= OFF): 01 = Input

02 = Setpoint

03 = Humidity Sensor

04 = External Temperature Sensor

| 00…04| 01

Control Parameters (Password 0241)
Note: Only experts should change these settings! See user parameter for login procedure!
Table 2: Output Configuration

(Time the fan runs before control output starts)

| 0…255 s| 10 s
CP 03| Stop delay for fan

(Time the fan keeps running after control output stops)

| 0…255 s| 90 s

Table 3: Temperature Setback Configuration – *For humidity control only

OFF = Temperature set back is disabled ON =Temperature setback is enabled

| ON, OFF| OFF
CP 05| Setpoint limit at full setback| 0..100 %| 20 %
CP 06| Lower temperature limit:

Outside temperature with maximum setback

The setback will be equal to the minimum setpoint limit

| -40…60°C

-40…160°F

| -30 °C (-22°F)
CP 07| Upper temperature limit:

Outside temperature at begin of setback

| -40…60°C 40…160°F| 0 °C (32°F)
CP 08| Number of seconds taken into account to calculate the average input signal Low value = fast response

High value = slow response

| 0…100| 30

Product Specification

Power Voltage| Operating voltage Power consumption Terminal connection| 24 V AC 50/60 Hz ± 10 %, 24 VDC ± 10 %

Max. 3 VA

For wires 0.34…2.5 mm2 (AWG 24…12)

---|---|---
Signal input| Humidity sensor input| UI1
Signal Output| Analog Outputs Output Signal Resolution Maximum Load| A01

DC 0…10 VDC 39 mV, 0.078 mA

10 Ma (at 0…10 VDC)

20 Ma (at 0…20mA)

Environment| Operation:

Climatic Conditions Temperature Humidity

| IEC 721-3-3

Class 3 K5

0…50°C (32…122°F)

<95 % rH not condensing

General| Housing material Mounting Plate

Weight Condair CRC (including packing)

| ABS

Galvanized steel 260 g (9.2 oz)

Wiring Diagrams

Wiring diagram DDC-NA with CDC-NA for DA

Documents / Resources

| condair DDC-NA Dehumidification 0-10V Digital Duct Humidistat Package [pdf] Instruction Manual
DDC-NA Dehumidification 0-10V Digital Duct Humidistat Package, DDC-NA, Dehumidification 0-10V Digital Duct Humidistat Package
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