10
4. Starting the pump
4.1 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. 4
Vent screw/plug removal for pump
venting
4.2 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. 6.
UP models
Speed is fixed on Speed 3 (High) and cover
does not have a switch (cover is solid).
Fig. 5
Terminal box cover/lid 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. 6
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.
TM
04
5
644
3
609
Caution
TM
04 56
41 360
9
Switch position
Speed in % of max. speed
Low (Speed 1)
approx. 60 %
Medium (Speed 2)
approx. 80 %
High (Speed 3)
100%
TM
04
56
40
36
09
Low
H
H
H
Medium
High
Q
Q
Q
H = Head and Q = Flow
