Wilo Yonos MAXO Instrucciones De Instalación Y Funcionamiento página 58

en
Control mode selection during heating operation
System type
Heating/ventilation/air-condi-
tioning with resistor in transfer
section (space heater and ther-
mostatic valve) ≤ 25 % of the
total resistance
Heating/ventilation/air-condi-
tioning
Heating/ventilation/air-condi-
tioning with resistance in the
generator/distributor circuit
≤ 25 % of the total resistance
in transfer section (room radia-
tor and thermostatic valve)
Control mode selection during drinking water operation
System type
Domestic hot water circulation
systems
Domestic hot water circulation
systems
Domestic hot water circulation
systems
58
System conditions
• Dual-pipe systems with thermostat/zone valves
and low valve authority:
–
HN > 4 m
–
Very long outlet pipes
–
Heavily throttled line shut-off valves
–
Line differential pressure controller
–
High pressure losses in those system sections
that are flowed through by the total volume
flow (boiler, refrigerating machine, potentially
heat exchanger, distribution pipes to the first
junction)
• Primary circuits with high pressure losses
• Constant volume flow
• Hot water priority (c3)
• Manual night setback via speed stage alignment
(c1)
• Dual-pipe systems with thermostat/zone valves
and high valve authority:
–
HN ≤ 2 m
–
Converted gravity system
–
Conversion to large temperature storage (e.g.
district heating)
–
Low pressure losses in those system sections
that are flowed through by the total volume
flow (boiler, refrigerating machine, potentially
heat exchanger, distribution pipes to the first
junction)
• Primary circuits with minor pressure losses
• Underfloor heating with thermostat and zone
valves
• One-pipe system with thermostat and line shut-
off valves
System conditions
Domestic hot water circulation systems with thermo-
statically controlled line shut-off valves
Constant volume flow
Domestic hot water circulation systems with thermo-
statically controlled line shut-off valves.
• The differential pressure is kept constant at the
set differential pressure setpoint H.
Recommended for systems with balancing valves
Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08
Recommended
control mode
Δp-v
Constant speed
(c1, c2, c3)
Δp-c
Recommended
control mode
Δp-v
Constant speed
(c1, c2, c3)
Δp-c