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Idiomas disponibles
Idiomas disponibles
Maintenance
The only regular attention your new pressure system requires is to check the pressure tank's air charge
every 6 months. This can be checked at the air valve with a tire gauge. Do not charge tank to a higher
pressure than those in the table below.
Model
HS12-30HT1
HS18-30HT1
HS12-40HT1
HS18-40HT2
Where freezing may be a problem, all pipework should be buried and/or insulated (lagged) to prevent this
happening. Your Davey pump should be housed in an enclosure which does not experience temperatures
below freezing (32
o
F).
FREEZING CONDITIONS: In situations subject to freezing, drain water
from pump, tank & pipework to avoid damage not covered under
guarantee.
Trouble Shooting Check List
PUMP WILL OPERATE NORMALLY INITIALLY BUT WILL NOT RESTART ON WATER DEMAND - LOW
PRESSURE INDICATOR LIGHT IS ILLUMINATED
1.
Cut-in pressure set too high - must be at least 8psi below maximum pump pressure.
2.
Suction depth too great.
3.
Suction air leak - pump has lost prime.
4.
Blocked impellers or suction.
PUMP WILL NOT STOP
Note: This is normal if discharge flow is more than
Flow Cone not fitted in Hydrascan ® CL.
1.
Air lock in Hydrascan ® CL.
2.
3.
Water leaks on discharge side of pump.
MOTOR RUNS FOR SHORT PERIOD ONLY WHEN SWITCHED ON BUT DOES NOT PUMP - LOW
PRESSURE INDICATOR LIGHT REMAINS ILLUMINATED
1.
Suction line and pump body not filled with water.
2.
Air leaks in suction lines or suction pipe not under water.
3.
Air trapped in suction lines (also possible with flooded suction due to uneven rise in piping: eliminate
humps and hollows).
4.
No water at source or water level too low.
5.
Valve on suction lines closed.
PUMP SWITCHES ON AND OFF FREqUENTLY (CYCLING)
1.
Check that tank air charge is correct (refer above for Maintenance).
2.
Cycling may occasionally be caused by float valves filling tanks. This can be overcome by fitting more
draw off capacity - talk to your Davey Dealer.
3.
Leaking taps, float valves etc. check plumbing.
4.
Leaking check valve/foot valve.
PUMP WILL OPERATE NORMALLY INITIALLY BUT WILL NOT RESTART ON WATER DEMAND - LOW
PRESSURE INDICATOR LIGHT NOT ILLUMINATED
1.
In municipal boosting situation, cut-in pressure may be below incoming pressure, see page 4 for
Adjustment Procedures.
2.
Power supply problem - see MOTOR DOESN'T START WHEN SWITCHED ON - LOW PRESSURE
INDICATOR LIGHT NOT ILLUMINATED point 1 or 2.
3.
Static discharge head too high - measure vertical height to top outlet.
i.
Adjust the cut-in screw setting.
ii.
If static height greater than maximum head of pump, consult your Davey Dealer for advice.
4.
Hot water in suction pipe (170
To check air pressure in tank:
1.
2.
Tank Pre-charge
3.
36psi (248kPa)
48psi (330kPa)
4.
5.
F+).
o
Unplug pump.
Open outlet nearest to pump to release water pres-
sure.
Remove air valve cap from top of pressure tank and
charge tank to the pre-charge pressure in the table,
using air pump and check with tire gauge.
Plug in pump.
Close outlet.
/
gpm.
1
2
~ 10 ~
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