Master Bilt IHC-27, Installation & Operation Manual, Page: 11 / 16

6/17 Rev. E 57-02410 11
HOW TO CHANGE THE SETPOINT
HOW TO CHANGE a parameter value
NOTE 1 : The set value is stored even when the procedure is exited by waiting the time-out to expire.
NOTE 2 : Master-Bilt
®
SETPOINT is set at a recommended –25 ° F at the factory.
NOTE 3 : To scroll down the parameters without changing them, press the DOWN button.
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
®
Setting
SP Temperature Set Point SPL!SPH -25 °F
HYS Temperature Differential 1 to 255°F 7 °F
SPL Minimum Temperature limit setpoint -50!SPH -37 °F
SPH
Maximum Temperature limit setpoint SPH!120°
32 °F
AHA
High Temperature alarm -50!120°
30 °F
ALA Low Temperature Alarm 50!120° -45F
ATD Temperature Alarm Delay 0!120min 30min
DFT Number of Defrost Cycle per 24hr 0!99 hours 12
DLI Defrost Termination Temperature
-50!120°
55 °F
DTO Maximum Defrost Duration
1!120min
35min
ELECTRICAL CONNECTIONS
The controller is provided with 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, from 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 damages due to casual liquid infiltration. It is
recommended to place the thermostat probe away from air streams at return air for correct 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.