10-19-00 Air Conditioner Heat Pump Service Manual - Bryant RV ...

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Section B - Operation, cont’d.Heat Strip Mode Operation - See FIB. B10(For Duo-Therm air conditioners with an electric heat strip.)1. Momentarily depress and release the MODEpush-button until the HEAT STRIP indicator on the LCDis illuminated.2. The fan will operate in LOW, MED or AUTO. You willnot be able to select HIGH speed when in the HEATSTRIP mode. Depress and release the FAN pushbuttonto select desired speed.3. Depress and release the UP push-button to increasethe temperature or the DN push-button to decreasethe temperature. The final selected SETPOINT will bedisplayed in the LCD area of the Comfort Control Center.4. The electric heat strip will cycle ON and OFF per thetemperature SETPOINT displayed. The fan will either:a. continue to operate in the selected fan speed or,b. cycle OFF and ON with the heat strip if the AUTOfan speed has been selected.5. If the vehicle contains more than one ZONE, depressthe FAN and MODE push-buttons simultaneously toselect ZONE 2, and repeat procedures from Step 1above. Repeat entire procedure for each additionalzone.FIG. B1072Auto FanWhen AUTO FAN is selected, the fan speed will be determinedby the mode you are in.COOL MODE - In the COOL mode, which is the airconditioning mode, the fan will automatically select thespeed depending upon the difference between the temperatureSETPOINT and the room temperature. Whenthat difference is:8° or more The fan will operate on HIGH4° to 8° The fan will operate on MED4° or below The fan will operate on LOWB1d. Comfort Control CenterHEAT PUMP MODE - When HEAT PUMP mode isselected, the fan will automatically run in the LOWspeed.HEAT STRIP MODE - When HEAT STRIP mode isselected, the fan will automatically run in the LOWspeed.FAN ONLY MODE - In the FAN ONLY mode, the fanautomatically runs in the LOW speed.Refrigerant Compressor Time DelayA time delay of approximately two minutes occurs any timethe compressor is required to begin the cooling or heatpump cycle.Power InterruptionIn the event that power to the air conditioner or control isinterrupted, the system will restart with the same settingsyou have previously set.Zone ControlThe Duo-Therm Comfort Control Center will operate coolingand heating appliances which the vehicle manufacturerhas designed to heat or cool different areas (ZONES) ofyour RV. The Comfort Control Center will advise you if thevehicle has multiple ZONES, by showing ZONE 1, 2, 3 or4 in the LCD readout.Stage Control OperationIf the vehicle is equipped with a Duo-Therm Dual BasementAir Conditioner or a Dual Basement Heat Pump, youhave an air conditioning system that is designed to optimizecomfort and running efficiencies. This is accomplishedby providing an on-demand secondary stage of operation.Note: The primary stage will continue to operate even ifthere isn’t electrical power available to run the second stage.The Comfort Control Center simplifies this operation byallowing you to set the primary temperature set-point andthe differential temperature set-point which activates thesecondary stage. After turning on your Comfort ControlCenter, perform the following steps to set and activate thestage control operation. See FIG. B11.1. Momentarily depress the MODE push-button until thedesired mode of operation is selected. (FAN ONLY,COOL, HEAT PUMP)2. Momentarily depress the FAN push-button until the desiredfan speed indicator is illuminated (LOW, HIGH,AUTO)20
B1d. Comfort Control CenterFIG. B11Section B - Operation, cont’d.Aux. Heat - See FIG. B13When in the HEAT PUMP mode, if the outside ambienttemperature is measured to be below 24°F, the control willautomatically select the FURNACE operation. When thishappens, the AUX. HEAT and the HEAT PUMP indicatorson the LCD will illuminate. Once the outside ambient temperatureis measured above 34°F, the control will return tothe HEAT PUMP operation. If your vehicle does not containa furnace, and you have a Duo-Therm Heat Pump,once the outside ambient temperature goes below 24°F,the system will shut down until the outside temperaturereaches 34°F, at which time the Heat Pump will resumeoperation.3. Momentarily depress the UP and DN push-button untilthe desired room temperature set-point is displayed.This completes the setup for the primary stage of the DualBasement Air Conditioner or Dual Basement Heat Pump.Next, you will set up the secondary stage.FIG. B1372To Set Up the Secondary Stage1. Simultaneously depress and release the FAN andMODE push-buttons until the STAGE indicator on theLCD is illuminated. See FIG. B12.2. Momentarily depress the MODE push-button until thedesired mode of operation for the second stage is selected(FAN ONLY, COOL, HEAT PUMP). Normally,the mode of operation is the same as the primary stage.3. Momentarily depress the FAN push-button until the desiredfan speed indicator is illuminated (LOW, HIGH,AUTO).4. Momentarily depress the UP or DN push-button to setthe desired differential temperature setpoint (0°F to10°F). The secondary stage will run once the actualroom temperature reaches the differential temperaturesetpoint. Example: Desired room temperature setpointfor the primary stage in the COOL MODE is set at 72°F;differential temperature setpoint is set at 5°F. The secondarystage will activate when the actual room temperaturereaches 77°F (72°F + 5°F), and will continueto operate until the room once again becomes 72°F.FIG. B12Defrost Cycle - See FIG. B14This cycle is active during HEAT PUMP operation and allowsthe heat pump to operate down to 24°F. When theoutside ambient temperature is less than 42°F and greaterthan 24°F, a defrost timing cycle will begin. The defrosttiming cycle will allow operation of the heat pump for 40minutes. The fan will the be shut off, the refrigerant flowreversed and run for 4-1/2 minutes, this is the DEFROSTcycle. The refrigerant flow will then be returned to normaland after a 30 second delay, will continue until the temperatureis greater than 42°F or until the temperature becomesless than 24°F, at which time the furnace will activate.(See Aux. Heat). During the defrost cycle, the DE-FROST indicator on the LCD shall be illuminated.FIG. B14057221
Page 1 and 2: AIR CONDITIONER & HEAT PUMPSERVICE
Page 3: A1. AC VoltageThe unit is a 115VAC,
Page 6: Section A - Installation, cont’d.
Page 9 and 10: A6a. Roof Top UnitsSection A - Inst
Page 11 and 12: A6b. Basement Unitswill have the
Page 13 and 14: A6b. Basement UnitsFREE AREA - is t
Page 15 and 16: Section A - Installation, cont’d.
Page 17 and 18: B1b. Bimetal Relay ControlsCooling
Page 19 and 20: B1d. Comfort Control CenterON/OFF S
Page 21: B1d. Comfort Control CenterHeat Pum
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Page 27 and 28: B2. Heat PumpFIG. B18 13Wait at lea
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10-19-00 Air Conditioner Heat Pump Service Manual - Bryant RV ...

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