Davey 165S SHALLOW WELL PRESSURE PUMPS & SYSTEMS - Manual (Page 5)

Delivery Connections
(A) Pumps to be Operated as Automatic Pressure Systems:
Base Mounted tanks used
• Connect hose from Davey Supercell Pressure Tank to bottom of outlet tee on pump. Firm hand tight should be
sufficient. Ensure tank connection hose is not kinked.
• Fit gate valve to outlet tee of pump using thread seal tape.
• Connect delivery piping at gate valve.
top Mount tanks
• Fit the Davey three way tee piece (P/No 48638) into the priming hole on top of the pump. Ensure adequate
thread tape is used.
• Screw the tank into the top of the three way tee using thread tape.
• Fit gate valve to outlet tee of pump using thread tape.
• Connect delivery piping at gate valve.
• Fit the pressure gauge/priming plug to the horizontal outlet on the three way tee.
(B) Pumps to be Operated Manually at Power Point:
• Disconnect pressure switch tube by undoing tube nuts at pump outlet and at pressure switch.
• Tighten the cap on the bottom of the the discharge tee.
• Fit gate valve to pump outlet (11/4” Female) using thread seal tape.
• Connect delivery piping at gate valve.
• Fit pressure gauge on top of pump. A non-return valve may need to be fitted in the delivery piping on some
installations to prevent water cascading back through the pump. Consult your Davey Dealer or the Davey Customer
Service Centre.
pressure tank pre-charge
(Applicable to Pressure System Installation Only)
The Davey Supercell Pressure Tank requires the correct pre-charge of air for satisfactory operation. This pre-charge of air is
determined by the cut in pressure switch setting required for the particular system purchased. Check and adjust if necessary.
When a higher than standard pressure switch setting has been made, add air at the valve on top of the tank until the pressure is
15kPa below cut-in. Adjust this pre-charge BEFORE operating the pressure system.
priming the pump
(A) When Installed on Water Sources Below Pump
` Close gate valve at pump outlet. Remove the priming plug and fill pump body and suction pipe by pouring water into the
priming port on top of the pump. Air will be expelled, as the suction pipe is filled with water. When all air has ‘bubbled’ out,
replace the priming plug.
(B) When Installed on Water Sources Above Pump
Close gate valve at pump outlet. Remove the priming plug and fill the pump body by opening the gate valve on the
supply tank to allow water to flow into the pump. When the pump body is full and all the air bubbles have been expelled.
replace the priming plug.
operating the pump
1. Open nearest outlet tap.
2. Switch on power to pump.
3. Crack open gate valve at pump outlet to bleed trapped air from pump and pipework.
4. Allow pump to run until a change in sound of pump indicates that prime is established and pressure gauge reading rises
over 350 kPa.
4a. If pressure fails to rise, switch off pump power and repeat priming.
5. Slowly open gate valve at pump outlet. A strong flow of water should be evident at an outlet tap indicating pump is
functioning.
5a. If there is NO strong flow of water at the outlet tap, or the pressure gauge reading drops to 0, it may be necessary to re-
prime the pump. On long suction lines it may be necessary to re-prime several times to expel all the air from the suction
line to allow the pump to operate efficiently.
6. Open all taps in discharge pipe work.
7. Adjust gate valve at pump outlet so that pressure on gauge remains above operating pressure (standard 260kPa). Refer
Table for operating pressure of Models supplied with higher pressure jet kits.
do not run the pump without water.
A gate valve must be fitted at the outlet of all pumps prior to the connection of outlet piping.
NOTE: The use of small size pressure tanks may lead to a higher rate of pump cycling. Consult your Davey
dealer as to the suitability of the tank size to your application.
Do not run the pump without discharge flow (closed head).
- 5 -