Davey 165D DEEP WELL PRESSURE PUMPS & SYSTEMS - Manual (Page 6)

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TOP MOUNT TANKS
1. Fit a Davey three way tee piece (P/No 48638) into the priming hole on top of
the pump. Ensure adequate thread tape is used.
2. Screw the tank into the top of the three way tee using thread tape.
3. Perform steps (2) through to (3) above.
4. Fit the pressure gauge/priming plug to the horizontal outlet on the three way
tee.
Pumps to be Operated Manually at Power Point
As for automatic operation except that no pressure tank fitted, and pressure
switch tube to be removed from regulating valve, and valve connection plugged
with plug supplied.
Power Connection - Single Phase
A power connection point should be provided by a qualified electrician within the
pump housing.
Single phase Models are rated for 220/250 volts, 50Hz operation, and may be
connected to a standard 10 amp power outlet.
All single phase Models have automatic reset thermal overload protection built
in, i.e. should overload on motor cause thermal to open circuit and switch motor
off, it will automatically re-set and switch motor on when motor has cooled down
sufficiently, usually within a few minutes.
Power Connection - Three Phase
Model 165D only is also available for connection to a 3 phase 50Hz, nominal
415 volt power supply. A recommended wiring diagram can be found inside the
capacitor cover (see figure one below). Three phase units must be wired in by an
authorised electrician in conjunction with a contactor which has quicktrip or M10
rated overloads set at nameplate current.
Power connections and wiring must be carried out by an authorised electrician,
in compliance with applicable local standards.
WARNING: Automatic reset thermal overloads will allow the pump to restart without
warning.
ALWAYS disconnect the pump motor from the electrical supply before maintenance
or repairs.
1. Long extension leads should be avoided as they often have insufficient current
carrying capacity to run electric motors, hence they can cause substantial voltage
drop and operating problems.
2. Minimum voltage at the electric motor must not fall below 216 volts for single
phase, otherwise motor damage may result which is not claimable under
Guarantee.
3. If the electrical fittings in your country make it necessary to remove the plug
from the lead fitted to the motor, care should be taken to ensure that the earth
conductor green/yellow in the lead is properly connected to a good earth. This
work must only be undertaken by an authorised electrician.
Davey recommend the use of overloads which also have the ability to detect
“single phasing” or “dropped phase” conditions in the power supply.
Three phase 165D Pressure Pump models have
been designed to allow for connection either side
of the Capacitor Cover (marked “A” in figure one)
on the motor. (NOTE: Three phase motors do
not have capacitors fitted in the Capacitor Cover).
This is achieved by way of either of the two 19mm
access holes (marked “B” in figure one).
The access holes are designed to accept most
standard cable grommets. The unused hole can be sealed by inserting the plug
enclosed with the pump. To connect a three phase Pressure Pump start by
removing the Terminal Cover (“C”).
A short four core flex (“D”) is fitted from the motor
terminals (“E”). This lead is inserted through the
Blanking Grommet (“F”). Pressure switch or other
control leads (“G”) can be fitted as well. Incoming
power (“H”) can be fitted through the preferred
access hole, and terminated as shown in Figure
Three. A termination kit is available if required.
Insert the Blanking Grommet (“F”) into the Capacitor
Cover (“A”). Fix the short lead (“D”) into the path
provided in the non-drive end-shield and replace the
Terminal Cover (“C”).
IMPORTANT NOTE: – THREE PHASE MODELS ONLY
When the unit is connected and operating the phase balance should be checked.
This should be within 5% variation. “Rolling” the leads may help to improve a
small unbalance, but major phase unbalance will usually be attributable to an
input power unbalance. This must be addressed before the pump is used.
NOTE: Minimum three phase voltage supply at the motor must not fall below 374
volts, otherwise motor damage may result which is not claimable under Guarantee.
Before finalising wiring connections, check that motor rotates in direction of arrow
(clockwise when shaft is viewed from wiring connection end). To alter rotation,
change any two power leads at motor terminals.