Davey XJ50/XJ70/XJ90 Electric Pumps - Manual (Page 2)

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 Wa-
ter Supply to either Suction or Discharge of
Pumps & Pressure Systems
Most Water Supply Authorities have strict regu-
lations 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 Water Products
Pty Ltd can not accept
responsibility for loss or
damage resulting from
incorrect or unauthorised
installations.
Connection to your Water Source
BELOW GROUND WATER SOURCES
Whenever the installation position of the pump is higher than 1m (3.3ft) above
the lowest water level, a foot valve must be used on the end of the suction pipe
as illustrated in (C) below. Ensure that the foot valve is at least 1 /
2
metre below
minimum water level.
SPEAR POINT INSTALLATIONS
When a Dynajet ® is installed on a spear or well point, a check valve must be
fitted immediately on top of the spear point itself, as shown in (D) above. DO
NOT INSTALL THE CHECK VALVE AT THE PUMP OR AT THE TOP OF THE
WELL. DO NOT RUN THE PUMP WITHOUT WATER.
NOTE: Be certain to select the spear point to suit the well conditions and
regulate the flow rate from the pump accordingly.
SPEAR SIZE MESH APPROX. MAX. CAPACITY OF SPEAR
POINT
1 1 /
4
” (32mm) 60 15 - 23 1/min or 200 - 300 gal/hr
1 1 /
2
” (38mm) 60 23 - 38 1/min or 300 - 500 gal/hr
2” (50mm) 60 38 - 75 1/min or 500 - 1000 gal/hr
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.
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.
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 pressure
pump. All components have been designed and manufactured to give trouble free,
reliable operation.
XJ Ultra / XJ70P / XJ90P
1. Pressure tank
(supplied separately)
2. Pressure switch
3. Delivery outlet (1”F)
4. Suction inlet
(XJ Ultra = 1”F)
(XJ70P & XJ90P = 1 1 /
4
”F)
5. Pump body
6. Motor
XJ50 / XJ70 / XJ90
Are the same as above
less items 1 & 2.
Note: Your XJ Ultra, XJ70P &
XJ90P pump is designed to oper-
ate as an automatic pressure sys-
tem when used in conjunction with
a pressure tank such as a Davey
“Supercell 18C” tank (illustrated).
The tank, supplied separately,
needs to be fitted to the delivery
outlet prior to operating.
Assembly
Attach pressure switch (2)
to the delivery outlet tee (3)
by hand tightening the pres-
sure switch union nut (ensure
sealing oring is in place).
Screw pressure tank (1) onto
delivery outlet.
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.
Before installing your new pump, please read all instructions carefully as failures caused
by incorrect installation or operation are not covered by the guarantee. Your Dynajet®
XJ pump 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.
Do not use this pump to pump flammable fluids, such as petrol or
diesel fuels.
Do not use pipe thread sealing compounds on any part of this pump.
ONLY use Teflon sealing tape.
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.
Spear point flow capacities vary considerably. Check with the supplier
to ensure the pump and spear point are correctly matched.