Room Humidistat Specification and Installation Instructions HRC20-210518-ESA Page | 1 Model HRC20 Description The HRC20 is a wall mounted humidistat capable of monitoring and controlling relative humidity for applications using a room distribution system. Its primary function is to act as a room sensor for On/Off humidifiers. Features • On-board setpoint adjustment (10 to 60%RH) • Built-in humidity sensor • Plastic cover for wall mount installation • 24Vac or 24Vdc • 1 dry contact output (normally open) HRC20 Technical Specifications Specifications HRC20 Power supply 24 Vac or Vdc ±10% Power consumption 1 VA Electrical connection 0.8 mm2 [18 AWG] minimum Humidity sensor precision ±3% at 40 %RH and 23ºC [73ºF] Setpoint range 10 to 60 %RH Operating temperature 32ºF to 104ºF [0ºC to 40ºC] Storage temperature 14ºF to 122ºF [-10ºC to +50ºC] Relative humidity 0 to 95 %RH Enclosure protection IP 30 (EN 60529) Weight 0.13 lb [60 g] Dimensions A = 2.85” (72mm) B = 4.85” (123mm) C = 1.00” (25mm) D = 2.36” (60mm) E = 3.27” (83mm) F = 1.02” (26mm) A B C D E F Room Humidistat Specification and Installation Instructions www.neptronic.com Page | 2 Mounting Instructions CAUTION: Remove power to avoid a risk of malfunction. A. Remove the captive screw that’s holding the base and the front cover of the unit together. B. Lift the front cover of the unit to separate it from the base. C. Pull all wires through the holes in the base. D. Secure the base to the wall using wall anchors and screws (supplied). Make the appropriate connections. E. Mount the front cover on the base and secure using the screw. AEDCB PCB Overview Jumper (JP1) 1 2 3 4 5 6 Terminal Strip (TB1) TB1 JP1 Setpoint Dial 1 = Common 2 = 24 Vac or Vdc 3 4 5 = Contact Terminal 5 6 = Contact Terminal 6 } Not Available 1 2 3 1 2 3 1 2 3 = Wet Contact (for SKE4) = Dry Contact (for SK300/SKE and SKR) Room Humidistat Specification and Installation Instructions www.neptronic.com Page | 3 Wiring Diagrams On/Off SKE4 Humidifier Standard Field Wiring Common 24 Vac Contact Terminal 5 Contact Terminal 6 Airflow Switch High Limit Humidistat Interlock On/Off Demand Contact Control Demand (0-10Vdc) Room Humidity (0-10Vdc) Duct Humidity (0-10Vdc) Steam Output (0-10Vdc) Common 24 Vac 24 Vac HRC20* SKE4 PCB Control Connections 1 2 3 4 5 6 T B 3 T B 4 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 On/Off SK300/SKE Humidifier Standard Field Wiring F123789 SK300/SKE Humidifier Normally Open Contact Common 24 Vac Contact Terminal 5 Contact Terminal 6 HRC20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3 JP1 1 2 3 Airflow Switch High Limit Humidistat Room Humidistat Specification and Installation Instructions www.neptronic.com Page | 4 On/Off SKR Humidifier - Kit N (North America) Standard Field Wiring SKR-N Printed Circuit Board Dip switches TB5 ON1 2 3 Common 24 V Contact Terminal 5 Contact Terminal 6 HRC20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: Normally Open Contact JP1 1 2 3 TB 6 - 24 Vac On/Off SKR Humidifier - Kit N (Europe) Standard Field Wiring SKR-CE-N Printed Circuit Board T B 5 Transformer External Transformer (by others) Common 24 Vac Contact Termi5 Contact Termi6 HRC20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: Normally Open Contact JP1 1 2 3 Dip switches O N 1 2 3 Next >