Fault Finding - Deltec MC 500 Mode D'emploi

EN
Internal Protein Skimmer MC 500
The MC 500 is a Multi Compact high performance dual purpose skimmer for use inside the tank or
fitted within a sump.
Installation inside the aquarium
The skimmer is supplied with an adjustable bracket which can be fitted to the right or left hand side of the
unit and allows the height of the skimmer to be set above the water level. The skimmer housing must extend
by a minimum of 140mm above the water line as illustrated on the diagram. The bracket allows the unit to
hang from the edge of the aquarium and is secured to the skimmer body with 2 screws (B). If the skimmer
does not hang vertically within the tank, adjust screw (C) accordingly until this is achieved.
Installation inside a sump
The skimmer can be hung on the side of the sump as described above or can be free standing. Ensure that
the water intake and outlet are unobstructed. The minimum depth that the unit should be immersed for
satisfactory performance is 120mm. In a sump, correct setting of the weir plate is important and the air
should be closed a little to the 2 o'clock position.
Operation
After the skimmer is installed and the height adjustment water level is correct, the fine adjustment is done by
raising or lowering the skimmer cup. Allow app. 24 hours before doing so.
technical dimensions
data (l/w/h) appr.
MC 500 210x86x470mm
Maintenance
The Deltec skimmer range should need very little adjustment and maintenance once set correctly however
due to the high levels of calcium in marine aquariums it is common for deposits to build up on moving parts
requiring periodical cleaning. The MC 500 is fitted with a Aqua Bee pump. Aqua Bee pumps are fitted with a
little flap (8b) inside the outlet of the pump, which flips from one side to the other depending on the direction
of rotation thus ensuring that the pump always operates at full duty. It is recommended every 3 months, or
when required, that the pumps are removed from the skimmer having first drained the body of Water.
Check and clean the impellor of debris. Ensure that the direction flap moves easily and if necessary soak the
neck of the pump housing in white vinegar or lime scale remover to dissolve any calcium carbonate deposits.
Make sure that the impeller rotates freely on the ceramic shaft. If not submerge in lime scale remover.
A build up of calcium, dust and salt can restrict or block the venturi inlet on the connecting pipe work and
reduce the skimming efficiency. This should be checked and carefully cleaned with a toothpick or fine drill
rotated between the fingertips.
It is advisable to stop the pump for approximately 15 minutes once every week in order to dissolve any dust
or salt crystals that may have collected in the venture tube.
Malfunction
Pump produces
insufficient air
excessive air bubbles in
aquarium water
power
air flow appr.
consumption
10 Watt 400 l/h

Fault finding

cause
tap, airline or venturi blocked
airline kinked
ozonizer blocked
Pump flap No. 8a blocked
caused by additives in certain
sea salts and water conditions
air tap closed to far
min. height for aquarium size
sump installation normal stocking
530mm
remedy
clean
remove kink
clean
clean
use different salt or feed heavily for a
period, empty skimmer cup frequently,
open air tap fully. This condition may last
for several weeks.
open air tap
aquarium size
light stocking
500 ltr. 600 ltr.