Carrier WeatherMaster 50HC14 Installation Instructions Manual

Also see for WeatherMaster 50HC14: Service and maintenance instructions Service and maintenance instructions Installation instructions

Contents

26Relay Digital Output Rating at 30 Vac (maximum powerfrom Class 2 input only) — 1.5A run:3.5A inrush at 0.45PF (200,000 cycles) or7.5A inrush at 0.45PF (100,000 cycles)External Sensors Power Output — 21 Vdc ± 5% at 48mAINPUTSSensorsNOTE: A Mixed Air (MA) analog sensor is required on allW7220 units; either an Outdoor Air (OA) sensor for dry bulbchange over or an OA bus sensor for outdoor enthalpy changeover is required in addition to the MA sensor. An additional Re-turn Air (RA) bus sensor can be added to the system for differen-tial enthalpy or dry bulb changeover. For differential dry bulbchangeover a 20k ohm sensor is required in the OA and a bussensor in the RA. DIP switch on RA bus sensor must be set inthe RA position.Dry Bulb Temperature (optional) and Mixed Air (required),20k NTC2-wire (18 to 22 AWG);Temperature range -40 to 150°F (-40 to 65°C)Temperature accuracy -0°F/+2°FTemperature and Humidity, C7400S1000 (optional)S-Bus; 2-wire (18 to 22 AWG)Temperature: range -40 to 150°F (-40 to 65°C)Temperature accuracy -0°F/+2°FHumidity: range 0 to 100% RH with 5% accuracy.NOTE: Up to three S-Bus sensors may be connected to theW7220 economizer module. For outdoor air (OA), return air(RA) and discharge (supply) air (DA).4 Binary Inputs1-wire 24 vac + common GND.24 Vac power supply20 to 30 vac 50/60Hz; 100 VA Class 2 transformer.OUTPUTSActuator Signal2 to 10 vdc; minimum actuator impedance is 2k ohm; bus two-wire output for bus communicating actuators.Exhaust fan, Y1, Y2 and AUX1 OAll Relay Outputs (at 30 Vac):Running: 1.5A maximumInrush: 7.5A maximumENVIRONMENTALOperating Temperature-40 to 150°F (-40 to 65°C).Exception of display operation down to -4°F with full re-covery at -4°F from exposure to -40°FStorage Temperature-40 to 150°F (-40 to 65°C)Shipping Temperature-40 to 150°F (-40 to 65°C)Relative Humidity5% to 95% RH non-condensingECONOMIZER MODULE WIRING DETAILSUse Fig. 49 and Tables 4 and 5 to locate the wiring termi-nals for the Economizer module.NOTE: The four terminal blocks are removable. You can slideout each terminal block, wire it, and then slide it back into place.Fig. 49 — W7220 Wiring TerminalsTable 4 — Economizer Module - Left Hand TerminalBlocksIMPORTANT: All inputs and outputs must be Class 2wiring.LABEL TYPE DESCRIPTIONTop Left Terminal BlockMATMAT20k NTCand COMMixed Air Temperature Sensor (PolarityInsensitive Connection)OATOAT20k NTCand COMOutdoor Air Temperature Sensor(Polarity Insensitive Connection)S-BUSS-BUS S-BUS(Sylk Bus) Enthalpy Control Sensor(Polarity Insensitive Connection)Bottom Left Terminal BlockIAQ 2-10 2-10 vdc Air Quality Sensor Input (e.g. CO 2sensor)IAQ COM COM Air Quality Sensor CommonIAQ 24-v 24 vac Air Quality Sensor 24 vac SourceACT 2-10 2-10 vdc Damper Actuator Output (2-10 vdc)ACT COM COM Damper Actuator Output CommonACT 24-v 24 vac Damper Actuator 24 vac SourceNAAUX2-OCCE-GNDEXH1AUX1-OY2-Y1-Y2-OY1-OCR50048848-002Rev. ANAA2OCCEXA1Y2IY2OY1IY1OCRCert ProductCalifornia Title 24,Part 6HJW10www.energy.ca.govMATMATOATOATS-BUSS-BUSIAQ 2-10IAQCOMIAQ 24VACT 2-10ACT COMACT 24VMAMAOAOASBSBSBSBSBSBVCRVCRNA50040839-001Rev. G