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Building Technologies
Boiler Sequence Controller RMK770
CE1P3132en
HVAC Products
8 Heat demand and heat requisitions
01.03.2005
31
31
D
2
0
1
2
Outside
temperature
Flow temperature
(Curve point 1):
Outside temp.
Max. flow temp.
readjustment
(Curve point 1):
Flow temp.
(Curve point 2):
Flow temp.
(Curve point 2):
Outside temp.
The adaptation of the flow temperature can be set as follows:
•
The speed of flow temperature readjustment can be set under
> Demand control >
Control action
•
The kind of evaluation of the consumers’ valve positions can be selected under
>
Demand control > Requisition evaluation
−
When using the “Maximum” setting, the flow temperature will be readjusted such
that the valve position of the consumer with the greatest heat demand is 90 %.
−
When using the “Average” setting, the flow temperature will be readjusted such
that the valve positions of the 4 largest consumers will be 90 % on average.
This setting does not ensure that the heat demand of all consumers can be satis-
fied. But it prevents an individual consumer from forcing the flow temperature to a
high level (e.g. because a window was left open).
Main menu > Commissioning > Extra configuration > Heat requisition %
Operating line
Range
Factory setting
Heat requisition % on
Main distributor / Primary
controller
Main distributor
T
T
T
T
31
32
S
8
1
T
T
2
1
HDT
A
B
HDT
Using setting
… > Heat requisition % on
: Main distributor (A) or primary controller (B), it
can be defined where the heat requisition of the heat demand transformer shall be
delivered.
This also means that there is only 1 heat demand transformer. Hence, only the main
distributor or primary controller can receive the heat demand from an RMU7…, for
example.