DUYAR OPUS 0-12 280 V, Установка, эксплуатация и обслуживание

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8
OPUS SERIES
INSTALLATION, OPERATION, MAINTENANCE
AND REPAIR MANUAL
In this operating mode, the pump operates by changing the rotation speed to follow a linear line between the set
pump head (Hsetting) and half of the set value (Hsetting /2). The pump provides a head on this line depending on
the decrease or increase in flow.
The Hsetting value of the pumps selected in accordance with the operating point is determined as follows:
► The H value at the operating point is marked on the variable pressure operating mode graph.
►
If the marked point is on any operating mode curve belonging to a multiple of 0.5, the H value of that operating
mode curve is accepted as the Hsetting value.
►
If the marked point is not on any operating mode curve belonging to 0.5 multiples, the closest operating mode
curve is passed and the H value of that curve is accepted as the Hsetting value.
The operating mode curves are plotted on the graph at 1 meter intervals. The setting can be selected on the screen
in 0.5 meter increments.
9.4 Operating Mode Selection Criteria
The operating mode is selected by considering the criteria in the table below:
Table 9.1
Operating Mode
Selection Criteria
Heating Systems
with Two Pipes
and Thermostatic
Valves
* Total friction loss > 4mSS
* Very long circulation line
* High friction losses
* Use of pressure balancing valve
* Extremely low branch valves
* Total friction loss < 2mSS
* Short or large diameter
circulation lines
* Low friction losses
Single Pipe
Heating Systems
* Systems using thermostatic
valves
* Systems using thermostatic
valve and pressure balancing
valve
Underfloor
Heating Systems
* High friction losses
* Use of pressure balancing valve
* Systems using thermostatic
valves
Table 9.1
Operating Mode
Selection Criteria
Heating Systems
with Two Pipes
and Thermostatic
Valves
* Total friction loss > 4mSS
* Very long circulation line
* High friction losses
* Use of pressure balancing valve
* Extremely low branch valves
* Total friction loss < 2mSS
* Short or large diameter
circulation lines
* Low friction losses
Underfloor
Heating Systems
* High friction losses
* Use of pressure balancing valve
* Systems using thermostatic
valves