Davey DynaDrive DD160-19, Инструкция по установке и эксплуатации

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3. APPLICATIONS
3.1 Above ground water sources (flooded suction)
Installations with flooded suction require a gate valve so water supply can be
turned off for pump removal and servicing, see figure 3.1. There is no need
to install a one-way check valve in the suction pipeline as there is a one-way
check valve installed in the tee piece immediately on top of the DynaDrive
pump discharge.
3.2 In-ground water sources (eg suction lift from in ground tank)
Whenever the installation position of the pump is higher than the lowest
water level, a foot valve should be fitted to the end of the suction pipe,
see figure 3.2. Ensure that the foot valve is at least ½ metre below
minimum water level to avoid a vortex of air being drawn into pipe. In
these applications the foot valve must replace the one-way check valve
that’s installed in the tee piece immediately on the top of the DynaDrive
pump discharge. To remove the one-way check valve, simply unscrew it
from the tee piece.
3.3 Spear point installations
When a pump is installed on a spear, or well point, a check valve fitted immediately
on top of the spear point itself, see figure 3.3. Do not install the check valve at the
pump, or at the top of the well. Do not run the pump without water in it. In these
applications the check valve on the spear must replace the one-way check valve
that’s installed in the tee piece immediately on the top of the DynaDrive pump
discharge. To remove the one-way check valve, simply unscrew from the tee piece.
3.4 Connecting mains scheme or town water supply to either suction,
or discharge of pumps and pressure systems
Most Water Supply Authorities have strict regulations
regarding direct connection of pumps to mains water
supplies. In most cases an isolating tank is required
between mains supply and pump, see figure 3.4. Davey
also recommend this method. Directly applied mains
pressure can exceed pump operating pressure and
damage pump. Davey Water Products Pty Ltd cannot
accept responsibility for loss, or damage resulting from
incorrect, or unauthorized installations.
MAINS W
ATER
Figure 3.1
MAINS W
ATER
Figure 3.4
Figure 3.2
> 1m
> 0.5m
Foot valve
(Not Supplied)
Figure 3.3
Check valve