Davey X90 Water Pressure Systems - Manual (Page 2)

Choosing a Site
Choose a site with a firm base and as close
to the water source as possible with correct
power supply. Make sure your pressure
system is always connected to an adequate,
reliable source of clean water.
Housing your Davey Pressure System
To protect your pressure system from the weather,
make sure the pump house is both water proof,
frost free and has adequate ventilation. The pump
should be horizontally mounted on a firm base
allowing for drainage, to avoid damage to flooring
etc., that over time may occur from leaking pipe
joints or pump seals. Do not mount the pump
vertically.
A good quality non-return valve must be
installed in the pressure pump outlet pipework
before the hot water service. Failure to install
this non-return valve may result in pump
damage. Such damage is not covered by
guarantee.
Connection of Mains Scheme or Town Water Supply to either Suction or
Discharge of Pumps & 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. Davey also recommend this
method. Directly applied mains pressure can exceed pump operating pressure
and damage pump.
Davey Products Pty Ltd can
not accept responsibility
for loss or damage
resulting from incorrect or
unauthorised installations.
WARNING: Some insects, such as small ants, find electrical devices
attractive for various reasons. If your pump enclosure is susceptible
to insect infestation you should implement a suitable pest control plan.
Pipe Connections
For best performance use P.V.C. or polythene pipes at least the same
diameter as the pump’s inlet and delivery outlet openings. Larger diameter
pipe may be used to minimise resistance to flow when pumping longer
distances.
Use unions at pipe connections to enable easy removal and servicing. Use
sufficient tape to ensure airtight seal and hand tighten only. To prevent strain
on pump threads always support heavy inlet and outlet pipes. If there is a
likelihood the water supply may contain
solid particles such as pieces of plant or
vegetable matter, a suction strainer should
be installed before the pump to avoid
blocking of the pump. Lay suction pipe at
a constant gradient to avoid air pockets
which may reduce pump efficiency.
Where to use Check Valves and Foot Valves
Installations with a suction lift over 1m require a good quality foot valve to
avoid loss of prime. In this case, the poppet valve inside the pump should
be removed. Installations with flooded suction require a gate valve so water
supply can be turned off for pump removal and servicing.
Prior to using this pump you must ensure that:
• The pump is installed in a safe and dry environment
• The pump enclosure has adequate drainage in the event of leakage
• Any transport plugs are removed
• The pipe-work is correctly sealed and supported
• The pump is primed correctly
• The power supply is correctly connected
• All steps have been taken for safe operation
Appropriate details for all of these items are contained in the following
Installation and Operating Instructions. Read these in their entirety before
switching on this pump. If you are uncertain as to any of these Installation and
Operating Instructions please contact your Davey dealer or the appropriate
Davey office as listed on the back of this document.
Congratulations on your purchase of a high quality, Australian built Davey pres-
sure system. All components have been designed and manufactured to give
trouble free, reliable operation.
1. Pressure tank
2. Pressure switch
3. Delivery outlet
4. Suction inlet
5. Pump body
6. Motor
7. Base
8. Priming plug
Connection sizes:
Model Inlet Outlet
X50 1” 1”
X70 1 1 /
4
” 1”
X90 1 1 /
4
” 1”
Do not use pipe thread sealing compounds on any part of this pump.
ONLY use Teflon sealing tape.
Before installing your new pump, please read all instructions carefully as fail-
ures caused by incorrect installation or operation are not covered by the guar-
antee. Your Dynajet® system is designed to handle clean water. It should not
be used for any other purpose without specific referral to Davey. The use of the
pump to handle flammable, corrosive and other materials of a hazardous nature
is specifically excluded.
Priming and Operation
1. Remove priming plug and fill
pump and suction line (on flooded
suction, simply open gate valve
to pump). When full,
replace priming plug.
2. Ensure outlet nearest to pump is
open.
3. Ensure all valves in suction line are
open and switch on.
4. Prime should establish almost
immediately and a strong flow
of water should be
evident from the
outlet. Allow water to
flow for 10-20 seconds
to expel air then close
outlet.
5. If no flow is evident from tap,
switch off at power point and repeat
from step 1 ensuring there is an
adequate supply of water available
to the pump.
Power Connection
Connect lead to power supply designated on pump label, do not use
long extension leads as they cause substantial voltage drop, poor
pump performance and may cause motor overload.
NOTE: Suction leaks are the
largest cause of poor pump
performance and are difficult
to detect. Ensure all
connections are completely
sealed using thread tape only.
IMPORTANT
For Automatic Pressure Pumps Installed with a Mains Pressure Hot
Water System.
Abrasive Materials
The pumping of abrasive materials will cause damage to the
pressure system which will then not be covered by the guarantee.