37 ELECTRONIC CONTROLLER
LOGIC HIU DIRECT 50 MT
LOGIC HIU DIRECT 50 HT
All the heating and domestic hot water functions offered by
the Logic Indirect HIUs are controlled by a digital controller.
The controller is factory set with the parameters for the HIU
unit ordered.
IMPORTANT
These DIP switches configure the control for different units
within the range. It is important that they are not changed
from those shown below. If they are changed outside of these
requirements it will cause the HIU to operate incorrectly and
may cause hazardous operational conditions. To modify
the factory settings and enable the HIU to support LOW
temperature systems (25 to 45˚C), proceed as follows:
Electronic Control
Dip Switch Settings
Factory Settings
Setting Capability
Production settings
Type
Heating
DHW
Heating
DHW
6
5
4
3
2
1
Logic HIU Direct MT
75
54
50 to 75 42 to 60
ON
Logic HIU Direct HT
85
54
Max 85
42 to 60
ON
Underfloor Low Temp Settings
6
5
4
3
2
1
ON
Do not change
Can be Changed
OPTION Indirect only
Switch 1
Modulating temperature regulation with compensated set point
Switch 2 & 3
Conversion to & from Low temperature to high temperature CH
Switch 5
Domestic water pre heating function
TABLE 1
DIRECT
ELECTRONIC CONTROL
20
LOGIC HIU
-
Installation & Servicing / Users