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Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08 29
System type System conditions Recommended
control mode
Domestic hot water circulation
systems
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
Δp-c
8.4 Adjust operating mode and pump output
Factory settings heating pump
The pumps are delivered in control modeΔp-v. The required delivery head is preset to ½ of the maximal re-
quired delivery head (see pump data in the catalogue). Adjust operating mode and pump output according to
system requirements.
Factory settings drinking water pump
The pumps are delivered in control modeΔp-c. The required delivery head is preset to ½ of the maximal re-
quired delivery head (see pump data in the catalogue). Adjust operating mode and pump output according to
system requirements.
Adjust the settings
In the design, the system is configured at a certain duty point (hydraulic full load point at calculated maximum
heating load or total resistance of the drinking water pipe network). When commissioning, adjust the pump
output (delivery head) to the corresponding duty point. Select the alternative operating mode with constant
speed.
1. Adjust desired operating mode with operating button.
▶ The LED display shows the operating mode (c1, c2, c3) or the setpoint in m (at Δp-c, Δp-v).
1. Adjust the setpoint by turning the operating button (only at Δp-c, Δp-v).
NOTICE
The setpoint is displayed on the LED display in 0.5m increments (at set delivery head <10m)
or in 1m increments (at set delivery head >10m). Other steps are possible but not displayed.
9 Maintenance
9.1 Shutdown
The pump must be shut down before carrying out maintenance, repair or dismantling work.
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