Carrier AQUAZONE 50RHC Operating And Troubleshooting

Also see for AQUAZONE 50RHC: Installation and service instructions

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Carrier AQUAZONE 50RHC Operating And Troubleshooting Manual pdf 10 page image

O/13 Thermostat Type -- Switch 4 provides selectiou for heatpump O/B thermostats, O is cooliug output. B is heating out-put. Select ON for thermostats with O output. Select OFF forthermostats with B output.Dehumidificatiou Fau Mode -- Switch 5 provides selectionof uonnal or dehumidificatiou fan mode, Select OFF for dehu-midification mode. The fan speed relay will remain OFF dur-ing cooling stage 2, Select ON for normal mode. The fan speedrelay will turn on during cooling stage 2 in normal mode.Switch 6 -- Switch 6 provides selection for DDC operation. Ifset to DDC output fit EH2, the EH2 terminal will continuouslyoutput file last fault code of the controllel: If the control is set toEH2 normal, then the EH2 will operate as stml&trd electricheat output. Set the switch to ON to set the EH2 to normal. Setthe switch to OFF to set the DDC output fit EH2.Boilerless Operation --Switch 7 provides selection of boiler-less operation and works in conjunction with switch 8. In boil-erless operation mode, only the compressor is used for heatingwhen FPI is above the boilerless changeover temperature setby switch 8 below. Select ON for normffl operation or selectOFF for boilerless operation.Boilerless Changeover Temperature -- Switch 8 on SI pro-vides selection of boilefless changeover temperature set point.Select OFF for set point of 50 F or select ON for set point of4O EIf switch 8 is set for 50 F. then the compressor will be usedfor heating as long as the FPI is above 50 E The complessorwill not be used for heating when the FPI is below 50 F and thecompressor will operates in emergency heat mode, staging onEH 1 and EH2 to provide heat. If a thermffl switch is being usedinstead of the EPI thermistol: only the compressor will be usedfor heating mode when the FPI terminfds me closed. If the FPIterminals are open, the compressor is not used and the controlgoes into emergency heat mode.DIP SWITCH BANK 2 ($2) -- This set of DIP switches isused to configure accessory relay options. See Fig. 4.Switches 1 to 3 -- These DIP switches provide selection ofAccessory 1 relay options. See Table 1 for DIP switchcombinations.Switches 4 to 6 -- These DIP switches provide selection ofAccessory 2 relay options. See Table 2 for DIP switchcombinations.Auto Dehumidification Mode or High Fan Mode -- Switch 7provides selection of auto dehumidification fan mode or highfan mode. hi auto dehumidification fan mode the fan speedrelay will remain off during cooling stage 2 if terminal H isactive. In high fan mode, the fan enable and fan speed relays willturn on when terminffl H is active. Set the switch to ON for autodehumidification fan mode or to OFF for high fan mode.Factory Setting -- Switch 8 is set to ON. Do not chmlge theswitch to OFF unless instructed to do so by the factory.Table 1 -- DIP Switch Block $2 --Accessory 1 Relay OptionsACCESSORY 1RELAY OPTIONSCycle with FanDigital NSBWater Valve -- Slow OpeningOADReheat I (Fall in Humidity)Reheat -- (Rise in Humidity)LEGENDNSB -- Night SetbackOAD -- Outside Air DamperNOTE: All other DIP switch combinations are invalid.DIP SWITCH POSITION1 2 3On On OnOff On OnOn Off OnOn On OffOff Off OffOff On OffTable 2 -- DIP Switch Block S2 --Accessory 2 Relay OptionsACCESSORY 2 DIP SWITCH POSITIONRELAY OPTIONS 4 5 6Cycle with Compressor On On OnDigital NSB Off On OnWater Valve -- Slow Opening On Off OnOAD On On OffLEGENDNSB -- Night SetbackOAD -- Outside Air DamperNOTE: All other switch combinations are invalid.Deluxe D Control Accessory Relay Configura-tions -- The following accessory relay settings fire applica-ble for Deluxe D control:CYCLE WITH FAN --In this configuration, the accessoryrelay 1 will be ON rely time the Fro1 Enable relay is on.CYCLE WITH COMPRESSOR -- In this configuration, theaccessory relay 2 will be ON any time file Compressor relay isOU.DIGITAL NIGHT SET BACK (NSB) --In this configura-tion, the relay will be ON if the NSB input is comlected toground C.NOTE: If there are no relays configured for digital NSB, thenthe NSB and OVR inputs am automaticfdly configured formechmfical operation. See the Mechmfical Night Set Back sec-tion on page 16.WATER VALVE (Slow Opening) -- If relay is configured forWater Vfflve (slow opening), the relay will stm't 60 secondsprior to starting compressor relay.OUTSIDE AIR DAMPER (OAD) --If relay is configured forOAD, the relay will normfdly be ON any time the Fan Enablerelay is energized. The relay will not start for 30 minutes fol-lowing a return to normal mode fi_m NSB, when NSB is nolonger connected to ground C. After 30 minutes, the relay willstfut if the Fan Enable is set to ON.HUMIDITY CONTROL -- A separate humidistat will allowthe unit to dehumidify once the heating call is satisfied. Someintegrated thermostats may be reconfigured to ffllow dehumidi-fication in heating. See Fig. 4 for typical humidistat wiring. Seebelow for Deluxe D DIP switch settings and reheat logic.SWITCH BANK 2 REHEAT (ON) REHEAT (OFF)SENSOR LOGIC2,1 I 2,2 I 2,3 Terminal H Terminal HHumidistat OFF OFFI OFF Reverse 0 vac 24 vacDehumidistat OFF ON OFF Standard 24 vac 0 vacReheatHumidistat -- The humidistat energizes a contact when thehumidity of the space rises or falls. See Table 3. A reheat coil(water coil located after the evaporator coil) will be modulatedby a motorized vfdve enabled by the ACCI relay to bring thesupply air to neutral conditions.Table 3 -- Deluxe D Reheat Operating ModesINPUT* OUTPUTMODE O G Y1 H O G Yt ReheatModeNo Demand ON/OFF OFF OFF OFF ON/OFF OFF OFF OFFFan Only ON/OFF ON OFF OFF ON/OFF ON OFF OFFCooling ON ON ON OFF ON ON ON OFFCooling and ON ON ON ON ON ON ON OFFHumidistati"Humidistat ON/OFF OFF OFF ON ON ON ON ONOnlyHeating OFF ON ON OFF OFF ON ON OFFHeating and OFF ON ON ON OFF ON ON OFFHumidistat_Reheat mode may be controlled with a humidistat configured for a rise or fallin humidity,]-Cooling input takes priority over dehumidify input,_*Deluxe D is programmed to ignore the H demand when the unit is in Heatingmode.10