Nortec On Digital Duct Humidistat - Manual (Page 2)

2 | Introduction
Duct Humidistat LCD Display
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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.
Login Procedure
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 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 30