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T
S
ROUBLE
HOOTING
Possible Cause 3.) Insufficient Flow
The flow rate through the heater needs to be confirmed to be sufficient. Switch off
the circulating pump, close the ball valve unions and un-screw the flow switch. (Use
caution as you will experience a small amount of water loss as you un-screw the
flow switch and conduct the test). With the heater switched on, manually move the
paddle of the flow switch to simulate water flow. If the heater switches on release
the paddle immediately to ensure the unit doesn't overheat. Reinstall the flow
switch and increase the flow rate through the heater. Chocked filters or blockages
can cause a significant reduction in flow.
No lights appear on the heater when it is switched on
Possible cause: Power Failure external to the heater - Remedy:
Check any fuses, RCD or other switch components installed in the supply cable.
NOTE: the heater is not fitted with a fuse.
If it becomes necessary to confirm that your Elecro heater is delivering the specified
heat output, an electricity meter reading will be required (taken from the property's
main electricity meter). Two readings will need to be taken with an exact one hour
interval (i.e. take one meter reading then a second reading exactly one hour later).
Then by subtracting the first reading from the second reading the number of units
(kilo watts / kW) consumed can be calculated. Note that your Elecro heater is also
rated in kW hours. To avoid inaccurate results when performing this test, it is im-
portant to refrain from using other high current drawing appliances in the property
(such as tumble dryer, showers etc). The pond pump and heater will need to be run-
ning (i.e. red light on) continuously during the test. A large pond pump of 1 horse-
power will draw less than 1-kW in a one hour period.
The conclusion of the test should prove that for example a 6-kW heater and a ½
horsepower pump will draw between 6.3-kW to 6.5-kW in one hour. It is impossible
for an Elecro heater to waste energy. All the power drawn by the heater will be
turned into heat and transferred to the water.
Due to the high efficiency of the Elecro heater no warmth should be detectable from
the stainless steel flow tube of the heater.
C
ONTINUED
P
IPE
It is essential that the pipe work connecting to and from the heater has a minimum
bore (internal diameter) of 1¼'' (32-mm).
To assist correct air purging and to ensure the heater remains completely full of wa-
ter during operation, the return pipe which carries the water back to the pond must
incorporate a safety loop or kick up in the pipe, installed as close as possible to the
heater (see diagram below).
Note: When coupling to flexible pipe, a safety loop can simply be created by routing
the pipe up and over an obstacle. Remember to use pipe clips to securely fasten all
hose connections.
NOTE: To allow ease of periodic internal cleaning - it is recommended that the
heater is installed with ball valve unions on both water input and output sides. This
will allow the water to be shut off on both sides of the heater to allow removal from
the system.
W
EATHER
The heater should be installed within a dry weatherproof enclosure.
If the heater is not used during winter months it must be drained to prevent frost
damage.
W
ORK
P
ROTECTION
CAUTION
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