Auto-Sleepers Symbol Plus 2018, Manual

Page: 27 / 126

7-3
CONNECTION OF SERVICES
WATER PRESSURE SWITCH
Adjustment
Your pressure switch is factory set and
should not normally require adjustment. In
the event that your pump doesn’t switch off
when you close the taps , or it pulses on and
off when the taps are fully open, follow these
guidelines to readjust the setting.
Pressure switch adjustment may be required
usually because the power supply voltage
has varied from the previous setting. Possible
causes are: a. Battery drainage through
normal use b. Higher voltage supply when
battery charger operating
Pressure Switch Setting
1. Ensure the system, including the heater
is full of water and all taps are closed.
Refer to your user manual. Be sure to set
the switch at low battery condition.
2. If present, remove the pressure switch
locknut in an anti- clockwise direction,
then tighten the adjusting screw
clockwise until the pump comes on.
3. Open any tap until you have a smooth
flow of water, then close the tap. You
should hear the pump running and the
pump running light if fitted will be on.
4. Return to the pressure switch and turn
the screw slowly anti-clockwise until the
pump has stopped. Turn the screw a
further half turn (180 degrees)
anti-clockwise.
5. Check for correct operation by opening
and closing all taps individually. The
pump should turn on when the cold tap is
opened and switch off immediately when
the cold tap is closed. NB At low flows
there may be some pulsation.
6. The hot side may take about 10 seconds
to react (both on and off) due to
cushioning from the water heater.
7. Carefully replace the lockout until it is
tight keeping the adjustment screw in
position.
Remember: You may also have to adjust the
pressure switch to cope with changes in
voltage from either battery or mains. Do so
using the above instructions.
If setting of pressure switch is still not correct
you may experience:
Pump running continuously, even with tap
closed. If undiscovered, could result in pump
failure and flat battery. Most likely causes are
that present voltage is significantly lower
when last adjusted, or water container is
empty.
CURE: Re- adjust switch or refill container
Pump does not run at all. If not due to blown
fuse or faulty connections, then most likely
cause is excessive continuous running (see
‘a’ above)
CURE: Replace pump and readjust switch
Pump runs intermittently ON, OFF, ON, OFF
etc. Seen as pulsing flow from tap, or as
inability to set constant water temperature,
water goes hot, cold, hot, cold instead of
constant warm. Most likely cause is that
present voltage is significantly higher than
when last adjusted.
CURE: Readjust pressure switch, if problem
persists add a Whale Surge Damper.
Pump runs very noisily but does not pump
water. Likely to occur after water container
has been refilled. Pump is air- locked and is
fighting to get air out and water in.
CURE: Unplug from the socket, allowing
pump to flood, and reconnect by plugging in
again. The correct sequence when refilling
the container is to unplug, put pump into
container, then reconnect.
Pump continues to run for up to 30 seconds
after tap is turned off. This is not a problem.
This is a characteristic of pressure switch
systems caused by the dampening effect of
the hot water heater or surge damper on the
cold side.
THREE GOLDEN RULES:
1. NEVER allow the pump to run dry.
2. NEVER allow the pump to run
continuously for more than 15 minutes.
3. The pump assembly MUST be
unplugged BEFORE putting the pump
back into the refilled water container.