Nortec On Digital Duct Humidistat User Manual download pdf (Page 2)

2 | Introduction

Duct Humidistat LCD Display

45.5%

35.0%

Legend:

1 Display of current humidity value.

2 Display of setpoint

3 Snowflake displayed if outdoor temperature setback active.

4 Adjusts setpoint and calibration (up)

5 Power ON/OFF

6 Toggles between RH setpoint and temperature (if temperature sensor

present)

7 Adjusts setpoint and calibration (down)

Sensor Calibration

The humidity sensor is factory calibrated, however, it can be field recalibrated. The calibration routine can be accessed by pressing the option key for > 3

seconds. Option key = the right key on the wall mount and middle key on the right side of the duct mount. Once the display changes select CAL H, press OPTION

key again - the offset value is now shown.

Press up down keys to change. Press option key again to save changed value and return to previous level.

Most applications can use default values.

User Parameters (Password 0009)

1 Press UP and DOWN button simultaneously for three seconds. The display shows the software version in the large digits and the product code in the small

digits.

2 Pressing the OPTION button will indicate CODE on the small digits and 0000 on the large digits.

3 The code for accessing the control parameters is 0009

4 Select this using UP or DOWN buttons.

5 Press OPTION button after selecting the correct code.

6 Once logged in, the parameter is displayed immediately.

7 Select the parameters with the UP/DOWN buttons. Change a parameter by pressing the OPTION button. Three triangles will show up on the lower right and

indicate that the parameter may be modified now. Use UP or DOWN buttons to adjust the value.

8 After you are done, press OPTION or POWER in order to return to the parameter selection level.

Table 1: User Parameters

Parameter

Description

Range

Default

UP 00

Enable change of operation modes

ON, OFF

ON (Enabled)

UP 01

Enable change of setpoints

ON, OFF

ON (Enabled)

UP 02

State after power failure:

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

0, 1, 2

UP 03

Celsius or Fahrenheit, Select ON for Fahrenheit, OFF for Celsius

ON, OFF

OFF (Celsius)

UP 04

Select contents of small digits in standard mode:

00 = OFF

01 = Setpoint

02 = Humidity Sensor

03 = External Temperature Sensor

0…3

01 Standard:

show setpoint

Control Parameters (Password 0241)

NOTE: Only experts should change these settings! See user parameters for login procedure.

Table 2: Output Configuration

Parameter

Description

Range

Default

CP 00

Minimum setpoint limit in humidification mode

0…100%

10%

CP 01

Maximum setpoint limit in humidification mode

0…100%

90%

CP 02

Start delay for fan

(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.

Parameter

Description

Range

Default

CP 04

Enable temperature setback

OFF = Temperature setback 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 setpoint 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 averaging input signal.

Low value = fast response

High value = slow response

0…100

1 2 3 4

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Nortec On Digital Duct Humidistat User Manual Page 2

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