4
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 endshield and
replace the Terminal Cover (“C”).
IMPORTANT NOTE:
- THREE
PHASE MODELS ONLY
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.
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.
Power connections and wiring
must be carried out by an
Authorised Electrician. Means of
disconnection must be incorporated
in the fixed wiring, in accordance
with local wiring rules.
9. PRIMING AND OPERATION
The pump body and suction line should be
filled by pouring water into the priming plug
hole adjacent to the outlet. Screw on the
priming plug, close the discharge valve two
thirds and switch pump on. Gradually open
the discharge valve and the pipeline fills.
In high suction lift conditions, the pump may
make a noise similar to it pumping sand or
gravel; this will usually be cavitation occurring.
Reduce flow until the cavitation noise stops.
Once the discharge pipeline fills you can open
the valve. If the cavitation noise returns, close
the discharge valve slightly until it stops.
In the case of installations where there is a positive
suction pressure (flooded suction) remove the
pump’s priming plug and slowly open the gate valve
in the suction piping to allow water to enter the
pump from the suction line until all air is expelled.
Replace the priming plug and fully open the gate
valve in the suction line and switch the pump on.
Prime should be established almost immediately,
however, it may be necessary to re-prime several
times on some installations before fully established
optimum pump performance is obtained.
Do not run pump dry or allow to
run continuously in a loss of prime
condition.
If this pump is allowed to pump water
containing sand or other abrasive
material, the effective life of the pump
will be shortened.
If pump runs but will not pump water, check for the
following:
1. Suction line and pump body not filled with water.
2. Leaking foot valve.
3. Air leaks in suction lines.
4. Air trapped in suction line (even on flooded
suction) possibly when there is an uneven rise in
the piping from water to pump (eliminate “humps
and hollows”).
NOTE: Prior to commencing
ANY maintenance on your
Dynaflo pump ensure that the
pump motor is disconnected
from the electrical supply.
