Control Mode Selection; Setting The Pump Output - salmson PRIUX MASTER-D 32-90 Instalacion Y Puesta En Servicio

8.2.2 Control mode selection

System type
Heating/ventilation/air-condi-
tioning systems with resistance
in the transfer section (room
radiator + thermostatic valve)
 25% of the total resistance
Heating/ventilation/air-condi-
tioning systems with resistance
in the generator/distribution
circuit  25% of the resistance
in the transfer section (room
radiator + thermostatic valve)

8.2.3 Setting the pump output

During planning, the unit is designed for a specific duty point (hydraulic full-load point for
maximum heating power requirement calculated). During commissioning, the pump out-
put (delivery head) is set according to the duty point of the system.
NOTE: The factory setting does not comply with the pump capacity required for the sys-
tem. It is determined with the help of the pump curve diagram for the selected pump type
(from catalogue/data sheet). See also Figs. 8 and 9.
Installation and operating instructions Priux master/-D
System conditions
1. Two-pipe systems with thermostatic/
zone valves and low valve authority
• H > 4 m
N
• Very long distribution lines
• Strongly throttled shut-off valves for pipe
sections
• Sectional differential pressure control
• High pressure losses in the system parts
through which the entire volume flows
(boiler/refrigerating machine, heat
exchanger possibly, distribution pipeline
up to the first branch)
2. Primary circuits with high pressure losses
1. Two-pipe systems with thermostatic/
zone valves and high valve authority
 2 m
• H
N
• Converted gravity heating systems
• Conversion to large temperature spread
(e.g. district heating)
• High pressure losses in the system parts
through which the entire volume flows
(boiler/refrigerating machine, heat
exchanger possibly, distribution pipeline
up to the first branch)
2. Primary circuits with low pressure losses
3. Floor heating systems with thermostatic
or zone valves
4. One-pipe systems with thermostatic or
line shutoff valves
Recommended
control mode
p-v
p-c
English
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