Honeywell DHC, Service Manual

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Operation SDC / DHC
80 EN2H-0221GE51 R0812
5.2.5.2 Heating system
This parameter refers to the type of the heating system (floor,
radiator or convector heating) and can be matched to the
exponent of the respective heat distributor. Using its progressive
characteristics, the set value determines the curve characteristics
of the heating curve of the direct heating circuit and compensates
for the losses in output in the low-temperature range with it.
The following settings are recommend depending on the type of
heating system:
UFH Slightly progressive heating curves for floor or other
area heating.
RAD Progressive standard heating curves for all radiator
heating with m-values between 1.25 and 1.35.
CONV Progressive heating curves for convector and
baseboard heating.
RAD (radiator systems)
UFH (floor heating) with mixed heating circuits
UFH, RAD, CONV
5.3 Error messages
ATTENTION
Inform the heating technician whenever any fault messages
are output.
The control device contains substantial error-notification logic.
The error messages appear in continuous alteration with the basic
display. Multiple errors that occur at the same time appear one
after another in the order in which they occurred. The following
types of error message exist:
Sensor measured values that do not lie in the measurement
range are evaluated as an interruption or short-circuit. They
appear depending on the type and allocation with fault code 10 to
20 and index 0 for short-circuit or 1 for interruption.
These error messages evaluate the respective switching status.
They appear depending on the type and allocation with fault code
30 to 40 and index 0, 1 or 2.
Factory setting
Setting range
Sensor error
messages
Heat generator error
messages