Greenheck Fan 470656 Sequence of Operation 41 Electronic Modulation, Program Revision Number

Page 41

Program Revision Number

To access the program revision number from the default display, press the Up or Down key until the display reads F##, J## or I##. The two numbers following the letter indicate the revision number. For example, F12 indicates program F, revision twelve.

Optional Room Override (ROt)

When the room override function is triggered, the discharge air temperature (70ºF default) is temporarily changed to the room override setting (90ºF default). When the room override function is released the discharge air temperature returns to the default temperature.

Indicating Lights

Three indicating lights are located across the top of the display to indicate the status of the furnace.

4:1 Electronic Modulation

Light

On

Off

Blinking

 

 

 

 

L1

Call for Heat

No call for heat

High fire

 

 

 

 

 

Call for heat

No call for heat

 

L2

sent to ignition

sent to ignition

High fire

 

controller

controller

 

 

 

 

 

L3

Combustion fan

Combustion fan

High fire

high speed

low speed

 

 

 

 

 

 

 

8:1 Staged Control

 

 

(Single Furnace Units)

 

 

 

 

 

Light

On

Off

Blinking

 

 

 

 

L1

Call for heat

No call for heat

N/A

 

 

 

 

L2

n/a

n/a

High fire

 

 

 

 

L3

Burner interlock

n/a

n/a

 

 

 

 

 

8:1 Staged Control

 

 

(Multi Furnace Units)

 

Light

On

Off

Blinking

L1

n/a

n/a

n/a

 

 

 

 

L2

n/a

n/a

Alarm

 

 

 

 

L3

Program Mode

n/a

Saving new

setting

 

 

 

 

 

 

 

®

Sequence of Operation 4:1 Electronic Modulation

1.Exhaust Fan Contact (S1) Manually Closed (optional)

•Power passes through N.C. contact on exhaust fan overload (ST2 OL), which is closed if exhaust fan (M2) has not overloaded

•Power passes to exhaust fan starter (ST2)

•N.O. contact on exhaust fan starter (ST2) is energized and closed

•Power passes to and energizes exhaust fan (M2)

2. Supply Fan Contact (S2) Manually Closed

•Power passes through N.C. field-supplied fire contact (FSC)

•Power passes through optional N.O. contact on exhaust fan starter (ST2), which is closed when the optional exhaust starter (ST2) is activated

•Power passes through N.C. contact on supply starter overload (ST1 OL), which is closed if the supply fan has not overloaded

•Power passes through N.C. contact on optional freeze protection timer (RT4), which is closed if the temperature has remained above the set point

•Power passes to and energizes optional inlet damper (D1), which opens

•Power passes through optional damper limit switch

(DL1), which is energized and closed if the optional inlet damper is open. It may take several minutes for the damper to fully open and for the damper limit switch to close

•Power passes to and energizes fan relay (RF)

•Power passes through N.O. contact on fan relay

(RF), which is closed once the fan relay (RF) is activated

•Power passes to and energizes starter relay (ST1)

•N.O. contact on supply fan starter (ST1) is energized and closed

•Supply fan (M1) starts

3. Heat Contact (S4) Manually Closed

•Power passes through N.O. contact on fan relay

(RF), which is energized and closed if the supply fan (M1) is on

•Power passes to and energizes the heat relay (RH)

•N.O. contact on heat relay (RH) closes

•Power passes to N.C. contact on high temperature limit control (HLC1), which remains closed if it has not been tripped

•24 VAC is supplied to ignition controller (IC1)

•The modulating controller (SC1) compares the inlet air temperature to the inlet air set point (iAS, FX Program Menu). If the inlet air temperature is below the set point, the modulating controller (SC1) closes N.O. contact (FUR 1) and sends a call for heat to the ignition controller (IC1)

Model IG / IGX Make-Up Air 41

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Contents General Safety Information Installation, Operation and Maintenance ManualReceiving Inspection and Maintenance during StorageHandling StorageClearance to Combustibles / Service Clearances Table of ContentsInstallation of Arrangement DB / HZ Installation of Indoor UnitInstall Combination Curb Adaptor Installation of Roof Mounted Unit Arrangement DBCInstall Curb/Equipment Supports Assemble and Attach WeatherhoodInstall Supply Unit Install Exhaust FanInstall Exhaust Options Installation of Venting for Outdoor Units Installation of Evaporative Cooling Module optionalVenting Methods Installation of Venting for Indoor UnitsStandard Indoor Venting Separated Combustion Concentric VentingVent Pipe Diameter Installation of Standard Indoor VentingInstalling Exhaust Vent Pipe Concentric Venting Horizontal Installation of Concentric Venting GeneralConcentric Venting Vertical Intake END Seal Wall Openings Installation of Two Pipe Venting HorizontalSeal Roof Penetration Installation of Two Pipe Venting VerticalInstallation Electrical Wiring Install Economizer Sensors optional Wire the Evaporative Cooler optionalInstall Discharge Air Sensor optional Install DDC Interface OptionalInstall Additional Regulator if Required Installation of Gas PipingDetermine the Supply Gas Requirements Connect the Supply Gas LineInstall the Water Supply Line Installation Evaporative Cooler Piping optionalInstall the Drain Line Check/Adjust Water LevelInstall Normally Closed Supply Line/ Solenoid Installation of Water WizardTM optionalInstall Normally Open Drain Line/ Solenoid Water Wizard Valves When provided by manufacturerInstallation Direct Expansion DX Coil Piping optional Installation of Water WizardWire the Solenoids Wire the Temperature SensorMount the Remote Sensing Bulb By Others Install Suction LineCheck Coil Piping for Leaks Evacuate and Charge the CoilInstallation of Building Pressure Control optional Installation of Chilled Water Coil Piping optionalStart-Up Blower Set-up Optional Components Start-Up Furnaces all units Reset the Temperature SettingStart-Up Single Stage Control Send Unit to High FireStart-Up 81 Staged Control Start-Up 21 Staged ControlSend Unit to Low Fire Check the Low Fire Manifold PressureAccess the Discharge Air Temperature Setting Access the Setpoints MenuEdit the Setting Access the Inlet Air Sensor SettingAccess the Room Override Setting Start-Up 21 Electronic Modulation High Fire AdjustmentCheck the Low Fire Manifold Pressures Exit High Fire ModeStart-Up 41 Electronic Modulation Access the Setpoints Menu Start-Up Economizer optional Verify Sensor InstallationSet Minimum Outside Air Set the Enthalpy Changeover Set Point optionalStart-Up Evaporative Cooling optional Start-Up Water Wizard optional Operation - Water Wizard optional Building Pressure Control External Signal a variableCheck Operation VAV Units optional Recirculation Operation Check Operation Recirculating Units optionalBuilding Pressure Control a Damper actuator may take a fewExhaust Fan Contact S1 Manually Closed optional Sequence of Operation Staged SequenceSequence of Operation 21 Modulation Sequence Outside Air Temperature OAt Discharge Air Temperature dtSSequence of Operation Modulation Sequence Operation Modulation Staged ControllerProgram Revision Number Sequence of Operation 41 Electronic ModulationOptional Room Override ROt Light Off BlinkingSequence of Operation Electronic Modulation Staging Control Sequence of Operation Sequence of Operation Staged ControlFollowing are the green LED codes of operation Operation and Errors Ignition ControllerOption EC-3 Differential Temperature Control Option EC-1 Outside Air Temperature ReferenceOperation Economizer Option EC-2 Outside Air Enthalpy ReferenceBlower Does Not Operate TroubleshootingMotor Over Amps Too Much Airflow Insufficient AirflowExcessive Noise or Vibration Improper manifold pressure Single or 21 Stage Furnace Will Not LightModulating Furnace Will Not Light Heat transformer TR2 fault Ignition controllers IC# failed Staged Furnace Will Not Light Internal high limit tripped temperature above set point Water Blows through Evaporative Cooler Evaporative Cooler does not Operate Recirculating pumpWater Wizard Improper Water Supply Adjust the Manual Supply ValveAdjust the On Time Factor Belt Drives Maintenance RoutineSnow Accumulation WheelsFilters MotorsChilled Water Coils Evaporative CoolersMaintenance Fall Flushing Coils Reference Model IGX Venting Connection Location Reference Model IG Venting Connection LocationReference Model IG Single or 2 Stage Reference Model IG Staged Reference Model IG Modulation Modulating Reference Model IGX Blower Control Center Manifold Gas Pressure Test Port Staged Inch Gas Supply Manifold Gas Pressure Test Port Modulating Staged Performance Table Reference Performance TableStart-Up Checklist Reference Start-Up ChecklistWarranty Maintenance Log
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