York DJ150 installation manual START-UP Cooling, START-UP GAS Heat

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035-19046-002-B-0104

GAS HEAT ANTICIPATOR SETPOINTS

It is important that the anticipator setpoint be correct. Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space. Reducing the value below the correct setpoint will give shorter “ON cycles and may result in the lowering of the temperature within the conditioned space. Refer to Table 25 for the required gas heat anticipator setting.

TABLE 25: GAS HEAT ANTICIPATOR SETPOINTS

 

SETTING, AMPS

 

 

 

W1

 

W2

 

 

 

0.65

 

0.1

 

 

 

HEATEXCHANGERTUBE

GAS

 

 

SUPPLY

 

BURNERFLAME

PIPE

BURNER

(BLUEONLY)

 

 

BURNERBRACKET

IGNITOR

FIGURE 26 - TYPICAL FLAME

START-UP (COOLING)

OPERATING INSTRUCTIONS

1.Turn unit electrical power on.

NOTE: Prior to each cooling season, the crankcase heaters must be energized at least 10 hours before the sys- tem is put into operation.

2.Set the room thermostat setting to lower than the room temperature.

3.First stage compressors will energize after the built-in time delay (five minutes).

4.The second stage of the thermostat will energize second stage compressor if needed.

POST START CHECK LIST

1.Verify proper system pressures for both circuits.

2.Measure the temperature drop across the evaporator coil.

START-UP (GAS HEAT)

PRE-START CHECK LIST

Complete the following checks before starting the unit.

1.Check the type of gas being supplied. Be sure that it is the same as listed on the unit nameplate.

2.Make sure that the vent outlet and combustion air inlet are free of any debris or obstruction.

PRESTART CHECK LIST

After installation has been completed:

1.Check the electrical supply voltage being supplied. Be sure that it is the same as listed on the unit nameplate.

2.Set the room thermostat to the off position.

3.Turn unit electrical power on.

4.Set the room thermostat fan switch to on.

5.Check indoor blower rotation.

If blower rotation is in the wrong direction. Refer to Phasing Section in general information section.

Check blower drive belt tension.

6.Check the unit supply air (CFM).

7.Measure evaporator fan motor's amp draw.

8.Set the room thermostat fan switch to off.

9.Turn unit electrical power off.

OPERATING INSTRUCTIONS

This furnace is equipped with an intermittent pilot and automatic re-ignition system. DO NOT attempt to manually light the pilot.

LIGHTING THE MAIN BURNERS

1.Turn “OFF” electric power to unit.

2.Turn room thermostat to lowest setting.

3.Turn gas valve counter-clockwise to “ON” position (see Figure 27).

4.Turn “ON” electric power to unit.

5.If thermostat set temperature is above room tempera- ture, the main burners will ignite. If a second stage of heat is called for, the main burners for second stage heat will ignite for the second stage heat.

Unitary Products Group

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Contents Installation Manual Table of Contents List of Tables List of FiguresSafety Considerations GeneralInspection Reference ApprovalsRenewal Parts Nomenclature 12½ Ton Predator Model Number Nomenclature 150 N15NOMENCLATURE, Additional Options Installation Installation Safety InformationPreceding Installation Limitations Compressor SectionPREDATOR Magnum Component Location Location Unit Temperature LimitationsUnit Voltage Limitations Rigging and HandlingUnit Weights Point Load WeightClearances Detail C Unit DimensionsBottom Duct Openings from Above Duct Covers Rear Duct Dimensions DuctworkPREDATOR Magnum Roof Curb Dimensions Filters Thermostat WiringControl Wire Sizes Power and Control WiringElectronic Thermostat Field Wiring Power Wiring DetailField Wiring 24 Volt Thermostat Contactor 1M Factory or Field Ground MCA Physical Data Optional Electric HeatMinimum Supply AIR CFM Optional GAS Heat GAS Heat Application DataGAS Piping LP UNITS, Tanks and Piping GAS ConnectionFactory Installed Options Field Installed Accessories Minimum Position Adjustment Enthalpy SET Point AdjustmentIndoor AIR Quality AQ Enthalpy SET Point Chart Belt Tension PhasingBlower Rotation Supply AIR LimitationsTurns Open ESP‡ CFM BHP Blower performance includes dry coil and two-inch Method ONE Indoor Blower SpecificationsAIR Balance Checking AIR QuantityDRY Coil Delta P Supply AIR Drive Adjustment Cooling Sequence of Operation OperationAdditional Static Resistance Motor Sheave Datum DiametersNo Outdoor AIR Options Economizer Single or Dual with Power ExhaustCooling Operation Errors HIGH-PRESSURE Limit SwitchCompressor Protection Safety ControlsElectric Heat Anticipator Setpoints Electric Heating Operation ErrorsElectric Heat Limit Setting Electric Heating Sequence of OperationsGAS Heating Operation Errors GAS Heating Sequence of OperationsIgnition Control Board GAS Heat Limit Control Settings START-UP GAS Heat START-UP CoolingChecking GAS Input Post Start ChecklistManifold GAS Pressure Adjustment Shut DownGAS Rate Cubic Feet PER Hour BURNERS/ORIFICES INSPECTION/SERVICING Adjustment of Temperature RiseUnit Control Board Flash Codes TroubleshootingCharging the Unit PREDATOR Magnum Flash CodesBasic Troubleshooting Flowchart Trip Failure Flow Chart Cooling Troubleshooting Guide Unitary Products Group 035-19046-002-B-0104 GAS Heat Troubleshooting Guide Unitary Products Group 035-19046-002-B-0104 Unitary Products Group Unitary 5005 Norman Products York Group Drive 73069

DJ150 specifications

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