DUYAR OPUS 25-12 180 Instalación Funcionamiento y mantenimiento - Página 10

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DUYAR OPUS 25-12 180 Instalación Funcionamiento y mantenimiento
OPUS SERIES
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

Table 9.1
Operating Mode
Operating Mode
Selection Criteria
Selection Criteria
8
Heating Systems
Heating Systems
* Total friction loss > 4mSS
* Total friction loss > 4mSS
with Two Pipes
with Two Pipes
* Very long circulation line
* Very long circulation line
and Thermostatic
and Thermostatic
* High friction losses
* High friction losses
Valves
Valves
* Use of pressure balancing valve
* Use of pressure balancing valve
* Extremely low branch valves
* Extremely low branch valves
Single Pipe
Heating Systems
Underfloor
Underfloor
* High friction losses
* High friction losses
Heating Systems
Heating Systems
* Use of pressure balancing valve
* Use of pressure balancing valve
INSTALLATION, OPERATION, MAINTENANCE
AND REPAIR MANUAL
* Total friction loss < 2mSS
* Total friction loss < 2mSS
* Short or large diameter
* Short or large diameter
circulation lines
circulation lines
* Low friction losses
* Low friction losses
* Systems using thermostatic
valves
* Systems using thermostatic
valve and pressure balancing
valve
* Systems using thermostatic
* Systems using thermostatic
valves
valves