Walrus Pump TQ Series, Инструкция по эксплуатации, Страница: 6 / 16

Directly applied city pressure can exceed pump operating pressure and damage the
pump. The max inlet pressure should not exceed 50 psi, except TQ3700 which is limited
to 45 PSI. Any greater incoming pressure is required to install a pressure reducing valve
on the suction side of the pump. In some areas where local codes restrict maximum home
pressure, a pressure reducing valve is also required on suction to lower the inlet pressure.
The chart below shows the applicable settings for the pressure reducing valve :
~ 4 ~
Check Valve
Check Valve
Isolation Valve
Union
Water Main Home Supply
Relief valve
To Drain
(Optional)
Pressure reducing valve
2. Flooded Suction -from city water supply
3. Suction Lift- below ground water sources
This connection does not require any adjustment. Whenever the installation position of the pump is
higher than 3ft above the lowest water level, a foot valve must be installed on the end of suction pipe.
Warning
The pump is not designed for continuous operation
under low discharge flows such as slow closing
float valves, slow running taps. Under this applica-
tion, please install an extra tank ( typically 2-3 gallon
) to avoid “cycling”. (Fig 5)
Please set the extra pressure tank prussure the
same as activation pressure. Leaking discharge line
and leaking taps will damage the unit through
causing the pump to repeatedly start and stop.
Note: Optional external water pressure tank can be
used to decrease the on/off cycle rate of the pump
system, which can extend the life of the pump.
Fig. 4
Fig. 5
Local code limits for
home pressure
No limit
90 psi
80 psi
Pressure reducing valve setting (psi)
TQ1500
50
30
20
TQ2200
50
30
20
TQ3700
45
20
10
Extra Pressure Tank
pipe tee