Greenheck Microprocessor Controller v3.0 (469690) Manual de usuario descargar pdf (Pagina 19)

Will heater be used

for reheat during

dehumidification?

Reheat:Enable

THIS SCREEN ALLOWS THE USER TO ENABLE THE HEATER FOR REHEAT PROCESS.

This screen only appears if a Heating option was provided with the unit and the unit

does NOT have hot gas reheat.

If it is desired that the heater be used to reheat the air off the cooling coil when in

dehumidification, adjust this screen so the Enable is displayed.

Will heater be used for

reheat along

with the hot gas?

Heater:Disable

THIS SCREEN ALLOWS THE USER TO ENABLE THE HEATER TO PROVIDE ADDITIONAL

REHEAT.

This screen only appears if Hot Gas Reheat and a Heating option was provided with

the unit.

Setting the Heater parameter to Enable allows the Heating option to provide additional

reheat above and beyond what the Hot Gas Reheat can provide. This would typically

only be used if the discharge temperature off the Hot Gas Reheat coil was too cold for

the space.

Hot Gas Controller

Integration:300s

Band:20ºF

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

GAS REHEAT MODE AND THE TEMPERATURE BAND AROUND A SET POINT.

These parameters may be adjusted if necessary. This screen only appears if a Hot

Gas Reheat 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

Hot Gas reheat coil

minimum on/off

time 10 minutes

THIS SCREEN ALLOWS THE USER TO ADJUST THE MINIMUM ON / OFF TIME FOR THE

HOT GAS REHEAT COIL.

This screen only appears if ON/OFF Hot Gas Reheat was provided with the unit.

This is the minimum on/off time operation for the Hot Gas Reheat coil. The factory

programmed time prevents short-cycling of the coil, which allows for better oil

distribution through the DX system.

Use caution when altering the on/off time as damage may occur to the system

if set too low. Consult the factory for information.

Supply Reset Control

Integration:300S

Band:20ºF

THIS SCREEN DISPLAYS THE INTEGRATION TIME AND TEMPERATURE RANGE FOR

THE PI CONTROL OF THE SUPPLY RESET TEMPERATURE.

These parameters may be adjusted if necessary. This screen only appears if a Room

Supply Temp sensor is wired between B4 and BC4 on the controller.

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 = Room set pt ± Band. ie: 72° F ± 20° F

PROGRAM MENU - continued

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Greenheck Microprocessor Controller v3.0 (469690) Manual de usuario Pagina 19

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