Bard WH-301, WH361 installation instructions Electric Heat HOLD-OFF See Figures 13

Page 18

ELECTRIC HEAT HOLD-OFF (See Figures 13 and 14)

In other applications, it is desirable to disable the operation of the electric heat until outdoor temperatures have reached a certain design point. This won't allow the electric heat to come on as second stage heating unless the outdoor temperature is below the set point of the outdoor thermostat. This is done to maximize

efficiency by utilizing the heat pump to bring the conditioned space temperature up, rather than cycling on the electric heat due a second stage call for heat from the thermostat on start-up coming off a night setback condition or someone increasing the thermostat set point. (NOTE: Some programmable thermostats do have a built-in time delay for pulling in second stage heat when coming off setback conditions.)

FIGURE 13

ELECTRIC HEAT HOLD-OFF WIRING 4 & 10KW 1 PH — 6 & 9KW 3 PH

FIGURE 14

ELECTRIC HEAT HOLD-OFF WIRING

15KW 1 PH & 3 PH

Manual

2100-193O

Page

18 of 26

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Contents Wall Mounted Installation Packaged Heat Pump Instructions Models WH301, WH361Contents Getting Other Information and Publications For More INFORMATION, Contact These PublishersShipping Damage Wall Mount General InformationHeat Pump Wall Mount Model Nomenclature GeneralElectric Heat Table BTUFront View Side View Back View Electrical Specifications CKT a CKT BFresh AIR Intake Fresh AIR Damper AssemblyFilters Condensate DrainMounting the Unit Installation InstructionsWall Mounting Information TOP Outlet onlyMounting Instructions Electric Heat Clearance Manual WALL-MOUNTING Instructions Common WALL-MOUNTING Installations LOW Voltage Connections Wiring Main PowerWiring LOW Voltage Wiring Operating Voltage RangeLOW Voltage Wiring Thermostat Wire Size Compressor Cutoff Thermostat Wiring Optional Outdoor Thermostat ApplicationsElectric Heat HOLD-OFF Wiring 4 & 10KW 1 PH 6 & 9KW 3 PH Electric Heat HOLD-OFF See Figures 13Thermostat Predominate Features Wall ThermostatStart UP Important Installer NoteService Hints Crankcase HeatersPressure Service Ports Defrost CycleDefrost Control Board Troubleshooting Solid State Heat Pump Control Troubleshooting ProcedureTroubleshooting Checking Temperature Sensor Outside Unit Circuit Temperature F VS. Resistance R of Temperature SensorFAN Blade Setting Dimensions Removal of FAN ShroudRefrigerant Charge Cooling Pressure PSI Outdoor Temperature F Heating Pressure PSI Outdoor Temperature FOptional Accessories WH301-A WH301-B WH301-C WH361-A WH361-B WH361-C