Carrier WeatherMaster 48HC07-12 Installation Instructions Manual

25Relay 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 additionalReturn Air (RA) bus sensor can be added to the system for dif-ferential enthalpy or dry bulb changeover. For differential drybulb changeover a 20k ohm sensor is required in the OA and abus sensor in the RA. DIP switch on RA bus sensor must beset in the 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 (3) S-Bus sensors may be connected to theW7220 economizer module. For outdoor air (OA), return air(RA) and discharge (supply) air (DA).4 Binary Inputs — 1-wire 24 Vac + common GND (see page27 for wiring details).24 Vac power supply — 20 to 30 Vac 50/60Hz; 100 VA Class2 transformer.OUTPUTSActuator Signal: 2-10 Vdc; minimum actuator impedance is2k ohm; bus two-wire output for bus communicating actuators.Exhaust fan, Y1, Y2 and AUX1 O:All 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 fullrecovery 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 Humidity:5% to 95% RH non-condensingECONOMIZER MODULE WIRING DETAILS — UseFig. 41 and Tables 7 and 8 to locate the wiring terminals for theEconomizer module.NOTE: The four terminal blocks are removable. You can slideout each terminal block, wire it, and then slide it back intoplace.Fig. 41 — W7220 Wiring TerminalsTable 7 — Economizer Module - Left HandTerminal BlocksIMPORTANT: All inputs and outputs must be Class 2wiring.LABEL TYPE DESCRIPTIONTop Left Terminal BlockMATMAT 20k NTCand COM Mixed Air Temperature Sensor (PolarityInsensitive Connection)OATOAT 20k NTCand COM Outdoor 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 24V 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 24v 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