Program menu – Greenheck Microprocessor Controller v3.0 (469690) User Manual
Page 17
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).
T
HIS
SCREEN
CAN
BE
LOCKED
TO
PREVENT
TAMPERING
WITH
THE
SETTINGS
.
F
ROM
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
T
HIS
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
T
HIS
SCREEN
ALLOWS
ADJUSTMENT
FOR
THE
M
INIMUM
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
T
HIS
SCREEN
DISPLAYS
THE
ON/OFF
FAN
CYCLE
TIMES
FOR
THE
T
IMED
E
XHAUST
F
ROST
C
ONTROL
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
T
HIS
SCREEN
DISPLAYS
THE
INTEGRATION
TIME
FOR
THE
PI
CONTROL
OF
THE
COOLING
MODE
,
AND
THE
TEMPERATURE
BAND
AROUND
THE
S
UPPLY
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