Room High Limit Humidistat Specification and Installation Instructions SHS20-210518-ESA Page | 1 Model SHS20 Description The SHS20 is a wall mounted high limit humidistat capable of monitoring and controlling relative humidity for applications using a room distribution system. Its primary function is to act as an On/Off high limit protection for humidifiers equipped with a space distribution unit (SDU). Features • On/Off high limit humidistat with on-board setpoint adjustment (20 to 90%RH) • Built-in humidity sensor • Plastic cover for wall mount installation • 24Vac or 24Vdc • 1 dry contact output (normally open) SHS20 Technical Specifications Specifications SHS20 Power supply 24 Vac or Vdc ±10% Power consumption 1 VA Electrical connection 0.8 mm 2 [18 AWG] minimum Humidity sensor precision ±3% at 40 %RH and 23ºC [73ºF] High limit setpoint range 20 to 90 %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 High Limit 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 Terminal Strip (TB1) TB1 Setpoint Dial 1 = Common 2 = 24 Vac or Vdc 3 4 5 = High Limit Terminal 5 6 = High Limit Terminal 6 } Not Available Jumper (JP1) JP1 1 2 3 1 2 3 1 2 3 = Wet Contact (for SKE4) = Dry Contact (for SK300/SKE and SKR) Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 3 Wiring Diagrams SKE4 Humidifier Modulating SKE4 Humidifier Field Wiring with HRO20 Common 4 Vac High Limit Terminal 5 High Limit 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 SHS20* SKE4 PCB Control Connections 1 2 3 4 5 6 1 1 1 1 16 24 VAC MOD %RH COM HRO20 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 Field Wiring with SHR10 Common 24 Vac High Limit Terminal 5 High Limit 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 SHS20* SKE4 PCB Control Connections 1 2 3 4 5 6 Common 24 Vac 0-10 Vdc Output 1 2 3 SHR10 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 4 On/Off SKE4 Humidifier Field Wiring with HRC20 Common 24 Vac High Limit Terminal 5 High Limit 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 SHS20* SKE4 PCB Control Connections 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 Common 24 Vac Contact Terminal 5 Contact Terminal 6 HRC20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 5 SK300/SKE Humidifier Modulating SK300/SKE Humidifier (Standard) Field Wiring with HRO20 1 2 12 13 14 15 16 24 VAC MOD %RH COM HRO20 1 875 432F 69 SK300/SKE Humidifier Common 24 Vac High Limerminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 Normally Open Contact Field Wiring with SHR10 1 875 432F 69 SK300/SKE Humidifier SHR10 Common 24 Vac 0-10 Vdc Output Common 24 Vac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 Normally Open Contact Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 6 Modulating SK300/SKE Humidifier (BACnet) Field Wiring with HRO20 1 2 12 13 14 15 16 24 VAC MOD %RH COM HRO20 1 875 432F 69 SK300/SKE Humidifier mmon Vac gh Limit Terminal 5 gh Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 Field Wiring with SHR10 1 875 432F 69 SK300/SKE Humidifier SHR10 Common 24 Vac 0-10 Vdc Output Common 24 Vac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 1&2: 1 2 3 JP1 Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 7 On/Off SK300/SKE Humidifier Field Wiring with HRC20 SK300/SKE Humidifier Common 24 Vac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 F123789 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 Normally Open Contact Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 8 SKR Humidifier Modulating SKR Humidifier - Kit N (North America) Field Wiring with HRO20 Modulating SKR-N Printed Circuit Board Dip switches External cut-off 24 Vdc Control demand from humidistat 0-10 Vdc - + 24 Vac Common ac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 1 2 12 13 14 15 16 24 VAC MOD %RH COM Setpoint HRO20 24 Vdc Normally Open Contact Modulating SKRHumidifier - Kit N (Europe) Field Wiring with HRO20 Modulating SKR-CE-N Printed Circuit Board 24 Vdc - + Transformer External Transformer (by others) 1 2 12 13 14 15 16 24 VAC MOD %RH COM Setpoint HRO20 Dip switches External cut-off Control demand from humidistat 0-10 Vdc 24 Vdc ommon 4 Vac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 Room High Limit Humidistat Specification and Installation Instructions www.neptronic.com Page | 9 On/Off SKR Humidifier - Kit N (North America) Field Wiring with HRC20 On/Off SKR-N Printed Circuit Board Dip switches - 24 Vac Common ac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 24 Vdc Normally Open Contact HRC20* *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 Common 24 Vac Contact Terminal 5 Contact Terminal 6 1 2 3 4 5 6 Normally Open Contact On/Off SKR Humidifier - Kit N (Europe) Field Wiring with HRC20 Modulating SKR-CE-N Printed Circuit Board Transformer External Transformer (by others) Dip switches 24 Vdc mmon Vac High Limit Terminal 5 High Limit Terminal 6 SHS20* 1 2 3 4 5 6 *Ensure that JP1 is set to terminals 2&3: JP1 1 2 3 HR* *Ensure set to te Common 24 Vac Contact Terminal 5 Contact Terminal 6 1 2 3 4 5 6 Normally Open Contact Next >