Nortec On Digital Duct Humidistat - Manual (Page 3)

2549737-D | 22 July 2014 Introduction | 3
Table 4: Technical Specification
Power Supply Operating Voltage 24 V AC/DC ± 10 %, 50…60 Hz
Power Consumption Max. 1.5 VA
Electrical Connection Terminal Connectors,
wire: AWG 24…12
Internal rectification:
Signal ground = power ground Half wave rectified
Isolation transformer required
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 (P/N: 2520263)
-40…70°C (-40…158°F)
Accuracy -40…0°C (-40…32°F): 0.5 C
0…50°C (32…122°F): 0.2 C
50…70°C (122…158°F): 0.5 C
Signal Outputs Digital Switching Outputs
Switching type
AC Switching power DO1…DO2
Relays
2 x 1.0 A, 24 Vac max.
Environment Operation
Climatic Conditions
Temperature
Humidity To IEC 721-3-3
class 3 K5
0…50 °C (32…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…70 °C (-13…158 °F)
<95 % r.H. non-condensing
class 2M2
Standards Product standards
Automatic electrical controls for household and
similar use
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
Mounting Plate Polycarbonate PC (UL94 class V-0)
PTFE coated 1μm pores
General Dimensions (H x W x D):
Transmitter case:
Probe length:
91 x 68 x 47mm (3.7” x 2.7” x 1.9”)
76 mm (3.0”)
Weight (including package) 220g
Power Failure
Upon power-interruption, all parameters and setpoints are memorized in non-volatile memory and therefore do not have to be re-entered again.
Table 5: Error messages and Troubleshooting Guide
Display Cause Symptoms Corrective Action
Err1
Humidity sensor faulty. The humidity
sensor is damaged.
The LCD screen will report the message
Err1.
Check that the humidity
sensing element is not loose
Err2
External input for temperature setback
missing or damaged.
The LCD screen will report the message
Err2.
Check that the temperature
sensor is connected to the
humidistat. If the sensor is
connected and the error
message persists a
replacement sensor should
be ordered.
NOTE: If at any time this troubleshooting guide fails to provide the information needed Nortec’s Technical Support Department can be reached at 1-866-
NORTEC-1 to provide assistance.