10
English (US)
6. Starting the pump
6.1 Vent the piping system
After the pump has been installed and the
electrical connections made, the piping system
must be vented.
NOTE: Do not vent the piping system through
the pump. Instead, follow these steps:
1. Fill and pressurize the system with liquid,
and vent all trapped air from the piping by
suitable means.
2. If any isolation valves are used, make sure
they are OPEN.
3. Vent the pump by removing the vent plug.
When water exists through the port, the
pump is fully vented / primed.
4. Reinstall the vent plug.
Fig. 8 Vent screw/plug removal for pump
venting
6.2 Speed selection
UPS models
Speeds can be changed via the speed switch on
the terminal box cover. Power must be turned off
before changing speeds. The speed in the three
positions appears in the following table; also see
fig. 10.
UP models
Speed is fixed on Speed 3 (High) and cover
does not have a switch (cover is solid).
Fig. 9 Terminal box cover with speed
switch in medium speed (Speed 2)
Changing to lower speeds offers considerable
reduction in energy consumption and less noise
in the system.
Fig. 10 Pump performance at speed
settings
Never operate the pump dry - the
system must first be filled with
liquid and vented.
Warning
If the vent screw/plug is to be
loosened, care should be taken to
ensure that the escaping scalding
hot liquid does not cause personal
injury or damage to components.
TM04 5644 3609
TM04 5641 2515
Switch position
Speed in % of max.
speed
Low (Speed 1) approx. 60 %
Medium (Speed 2) approx. 80 %
High (Speed 3) 100 %
TM04 5640 3609
Low
HHH
Medium
High
QQ Q
H = Head and Q = Flow
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