Master Bilt IM-23-HGP, Installation & Operation Manual

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9
HOW TO CHANGE THE SETPOINT
HOW TO CHANGE a parameter value
LIST OF PARAMETERS
Here is a list of the parameters the value of which can be changed in the programming mode, as well as their ranges.
Display
Symbol
Parameter
Range
Master-Bilt’s
IM-23-HGP Setting
SP Temperature Set Point SPLCSPH 18 °F
HYS Temperature Differential 1 to 255°F 7 °
SPL Minimum Temperature limit setpoint -50CSPH 16 °F
SPH
Maximum Temperature limit setpoint SPHC120°
50 °F
AHA High Temperature Alarm -50C120°
32°F
ALA Low Temperature Alarm 50C120°
0
°F
ATD Temperature Alarm Delay 0C120min 30min
DFR
Number of Defrost Cycle per 24hr 0C24 4
DLI Defrost Termination Temperature -50C120° 45
DTO
Maximum Defrost Duration 1C120min 30min
ELECTRICAL CONNECTIONS
The controller is provided with a screw terminal block to connect cables with a cross section up to 2,5 mm
2
. Before
connecting cables make sure the power supply complies with the control’s requirements. Separate the probe cables
from the power supply cables, the outputs and the power connections. Do not exceed the maximum current allowed on
each relay, in case of heavier loads use a suitable external relay or contactor’s.
PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damage due to casual liquid infiltration. It is
recommended to place the thermostat probe at the warmest loacation of return air streams to correctly measure the
average room temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where
most ice is formed, far from heaters or from the warmest place during defrost, to prevent premature defrost
termination.