Greenheck Microprocessor Controller v3.0 (469690) Manual de usuario descargar pdf (Pagina 18)

Compressor Setup

# of stages:2

Minimum ON:030s

Minimum OFF:180s

THIS SCREEN DISPLAYS THE NUMBER OF STAGES PROVIDED WITH THE UNIT AND

SHOWS THE COMPRESSOR MINIMUM ON AND OFF TIMES (IN SECONDS).

This screen only appears if DX cooling was provided with the unit.

The purpose of having minimum ON/OFF times is to prevent the compressor from short

cycling.

Do not change the defaults shown without consulting the factory.

Compressor Setup

Between stages:240s

Lead-Lag:YES

Lead-Lag Time:100hrs

THIS SCREEN DISPLAYS THE DELAY TIME BETWEEN STAGES, ALONG WITH THE

LEAD-LAG TIME PROGRAMMED FOR THE COMPRESSORS.

This screen only appears if 2-stage DX cooling (2 compressors) was provided with

the unit.

Between Stages is the time delay (in seconds) between the first and second

compressors engaging. Lead-Lag governs whether the stages will reverse operation

order after some period of time designated by the Lead-Lag Time setting (Factory

Default: YES, 100hrs.). The Lead-Lag Time is the duration of time the unit will operate

before reversing the DX staging. In other words, based on the factory default,

Compressor 1 will engage before Compressor 2 for 100 hours of operation. After 100

hours, the order reverses and Compressor 2 will engage first. This cycle will continue

indefinitely.

Stage1:ON@050%OFF00%

Stage2:ON@100%OFF50%

THIS SCREEN SHOWS WHEN EACH COMPRESSOR IN A SINGLE OR TWO STAGE DX

UNIT WILL ENGAGE AND DISENGAGE.

This screen only appears if DX cooling was provided with the unit.

Each compressor will engage and disengage based upon the percentage of

cooling that the user inputs (refer to Cooling Loop Override screen on the ‘MANUAL

OVERRIDE’ menu).

Lead-Lag Note

Stage:12

Compressor Lead:12

Compress Lag:21

THIS SCREEN ALLOWS FOR ADJUSTMENTS TO BE MADE TO THE ORDER OF WHICH

COMPRESSORS WILL ENGAGE.

This screen only appears if 2-stage DX cooling was provided with the unit.

This screen shows the order in which the compressors will engage when operating in

the lead-lag setup.

Compressor will lockout if

safety switches (ID8) trip

3 times in:120 min

IF THE CONTROLLER DETECTS THREE (3) ALARMS IN THE TIME PERIOD SHOWN, IT

WILL SHUT OFF THE COMPRESSORS AS A SAFETY MEASURE.

This screen only appears if DX cooling was provided with the unit.

The safety lockout screen monitors the safety loop of the DX system, including high

limit, low limit, and ambient temps. If the controller detects three (3) trips within 120

minutes, the controller will shut down the DX system. (Example: If the low limit switch

trips, automatically resets, and then trips two more times within 120 minutes, the DX

system will shut down). If there is a fatal trip, such as a high limit pressure switch trip,

the DX system will not run and the controller will signal an alarm after trying three times

unsucessfully to start the DX cooling process.

Heater Controller

Integration:300s

Band:20ºF

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

HEATING MODE AND THE TEMPERATURE BAND AROUND THE SUPPLY SET POINT.

This screen only appears if a Heating 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 - continued

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Greenheck Microprocessor Controller v3.0 (469690) Manual de usuario Pagina 18

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