Greenheck Microprocessor Controller v3.0 (469690) Manual de usuario descargar pdf (Pagina 17)

Access the PROGRAM menu by pressing key. Scroll through the menu screens using the keys.

The program button is used to setup the control loops for economizer, defrost, heating, cooling, and reheat

along with defaults for staging, supply reset, time delays, occupied mode, communications, set point source,

temperature scale, and changing passwords. Adjustments to these parameters should be performed by a

qualified technician. (A Level 2 password must be entered to alter any of the factory programming; factory

default is 9998).

THIS SCREEN CAN BE LOCKED TO PREVENT TAMPERING WITH THE SETTINGS.

FROM THE FACTORY, ACCESS IS NOT PASSWORD PROTECTED TO ALLOW QUICKER

START-UP.

To set the password, go to the ‘PROGRAM’ menu by pressing the button. Once

there, scroll down until you arrive at the Change Password screen. The ‘Level 2’

password protects the ‘Program’ menu.

***ACCESS DENIED***

Enter Password:0000

WRONG PASSWORD

Factory Setup

Consult factory

before altering

Economizer Controller

Integration:300s

Control Band:20ºF

THIS SCREEN ALLOWS THE INTEGRATION TIME FOR THE PI CONTROL OF THE

ECONOMIZER AND THE TEMPERATURE BAND AROUND THE SUPPLY SET POINT TO

BE ADJUSTED.

This screen will only appear if an Economizer mode was selected with the unit.

This controller uses a Proportional + Integral type control. The integration time

programmed into the controller is to provide a smooth reaction to conditions, allowing

for less sporadic changes in discharge temperature. To speed up reaction time,

decrease the integration time. For slower reaction time, increase the integration time.

When making adjustments, make them in small increments, and test the system to

determine if the new setting is adequate prior to further adjustment. The band is the

range that the integration will occur between.

Range of Integration = Supply set pt ± Band. ie: 50° F ± 20° F

Economizer Setup

Econo on/off times

Minimum ON:300s

Minimum OFF:300s

THIS SCREEN ALLOWS ADJUSTMENT FOR THE MINIMUM ON/OFF TIMES FOR THE

ECONOMIZER.

This screen only appears if ON/OFF economizer was provided with the unit.

These minimum ON and OFF times prevent the energy wheel motor from short cycling

during economizer mode.

Supply fan cycling

defrost setup.

Fan off time:005min

Fan on time:030min

THIS SCREEN DISPLAYS THE ON/OFF FAN CYCLE TIMES FOR THE TIMED

EXHAUST FROST CONTROL AND ALLOWS THE USER TO ADJUST THESE

PARAMETERS.

This screen only appears if Timed Exhaust Frost Control was provided with the unit.

These ON and OFF times prevent the buildup of frost when the unit is in Timed Exhaust

frost control mode.

Cooling Controller

Integration:300s

Band:20ºF

THIS SCREEN DISPLAYS THE INTEGRATION TIME FOR THE PI CONTROL OF THE

COOLING MODE, AND THE TEMPERATURE BAND AROUND THE SUPPLY SET POINT.

This screen only appears if a Cooling option was provided with the unit.

This controller uses a Proportional + Integral type control. The integration time

programmed into the controller is to provide a smooth reaction to conditions, allowing

for less sporadic changes in discharge temperature. To speed up reaction time,

decrease the integration time. For slower reaction time, increase the integration time.

When making adjustments, make them in small increments, and test the system to

determine if the new setting is adequate prior to further adjustment. The band is the

range that the integration will occur between.

Range of Integration = Supply set pt ± Band. ie: 50° F ± 20° F

PROGRAM MENU

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Greenheck Microprocessor Controller v3.0 (469690) Manual de usuario Pagina 17

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