050404.03
5
Pressurized-water system HYDRF12, HYDRF24, HYDRF1219, HYDRF2419
Winter Preparation
The whole drinking water system, including the pressurized
water system, should always be drained. Never fill the drinking
water system with anti-freeze, it is very poisonous!
Draining the pressurized water system
Remove the snap connector from the pump (drawing 4) and
take the drain tap from the connector piece (drawing 5). Allow
the pipes and pressure tank to drain empty. Then let the pump
run for a time without any water input.
Maintenance
Cleaning the Water Filter
Unscrew and remove the cover (drawing 6). Clean the filter ele-
ment thus exposed. Refit the cover.
Checking and Adjusting the Pressure Switch (drawing
7)
Switch on pressure: Open a tap a quarter of a turn only. As the
water runs out slowly the pressure will reduce. Now watch the
manometer for the pressure at which the pump is switched on.
Increase switch-on pressure : Turn nut 2 to the right.
Decrease switch-on pressure : Turn nut 2 to the left.
Switch-off pressure: Leave the tap open quarter of a turn, so that
the water pressure in the tank increases slowly. Now watch the
manometer to read the pressure at which the pump is switched
off. Increase switch-off pressure: Turn nut 1 to the right.
Decrease switch-off pressure: Turn nut 1 to the left.
N.B. Nut 1 adjusts the difference between switch-on and switch-
off pressure. After resetting the switch-on pressure, the switch-
off pressure must also be adjusted again.
Checking and pressurizing Pre-pressure and Air
Cushion
Remove the protective cap, turn to the left and check pressure
with a tyre air pressure meter.
Reduce pressure: Push the Schräder valve pin in; air will now
escape.
Increase pressure: Connect a car tyre pump to the valve and
bring the air cushion to the required pressure.
Replacing the Membrane
Under normal circumstances the membrane should never
need replacement. However if it does leak, replace as follows:
Ensure that the whole system is de-pressurized. Remove the
hose between pump and T-piece, remove the 6 bolts holding
the flange to the top of the tank and remove flange complete
with T-piece. Remove the old membrane, refit a new one and
reassemble in reverse order to the above.
ENGLISH
Technical data
Type
:
HYDRF12
HYDRF24
HYDRF1219
HYDRF2419
Electric motor
, Type
:
Permanent magnet DC motor
Voltage
:
12 V DC
24 V DC
12 V DC
24 V DC
Current at 0.7 Bar (10 psi)
:
3.9 Amp
2.0 Amp
6.0 Amp
2.5 Amp
Pump,
Type
:
Self-priming 4 valve diaphragm pump
Capacity at 2 Bar (30 psi)
:
12.5 litres/min (2.7 Imp.Gallon)
17.0 litres/min (3.7 Imp.Gallon)
Max. pressure
:
2.5 Bar (36 psi)
2.8 Bar (40 psi)
Maximum riser height
:
3 m (10 ft)
Filter,
Type
:
In-line
Mesh size
:
40 Mesh
Pressure switch
Settings,
Switch-on pressure
:
1.4 Bar (20 psi)
Switch-off pressure
:
2.5 Bar (36 psi)
Range,
Min. switch-on pressure
:
0.8 Bar (12 psi)
Max. switch-off pressure
:
4.8 Bar (70 psi)
Manometer,
Meter range
:
0 to 6 Bar (0 - 87 psi)
Pressure tank,
Capacity
:
8 litres (1.75 Imp.Gallon)
19 litres (4.2 Imp.Gallon)
Pre-pressure, air cushion
:
1.2 Bar (17 psi)
1.2 Bar (17 psi)
Connections, Hose
:
12.7 mm (1/2”)
19 mm (3/4”)
0 to 50 degrees C. (32 to 122 degrees F.)
Water temperature
:
Weight
:
8.2 kg (18 lb)
9.5 kg (20.9 lb)
