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INSTANTANEOUS
WATER HEATER
DAFI Accreditations:
BVQI ISO 9001: 200
European Safety and Conformity mark CE
NRCS (previously SABS) Approval Certificate
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DAFI energy saving water heaters can be installed above, or under
your basin or sink. Shower installations are also possible, but
never inside the shower cubicle. Installation of your water heater
in the ceiling or behind the wall, or in a cupboard next to the
shower should be considered.
DAFI
water heater Installation Requirements:
1. DAFI water heaters must be installed as close to the
point of use as possible to minimise pipeline heat
loss.
Closer is better, maximum distance 4-5 metres - pipe
to be lagged and insulated.
2. Water pressure must not be less than 200kPa (2 bar)
and not exceed 600kPa (6bar). Should water pressure
be too high, a pressure reducing valve must be installed.
3. Water quality e.g. mains supply, borehole, river etc.
Should water quality be suspect, a filter must be
installed.
4. Single phase or 3 phase power supply with own isolator
switch must be available as close as possible to point
of usage.
DAFI water heater Installation Procedure:
Installing the DAFI energy saving water heater is not complicated,
but it needs to installed by a professional plumber and electrician
for problem-free operation.
Water supply:
• To be undertaken by a qualified Plumber
• Incoming water supply should be clean and without any
suspended solids or organic materials.
• The "static" incoming cold water supply pressure to
be accurately measured to ascertain operating
conditions.
• The maximum operating pressure of all DAFI Heater models
is 600 kPa (6 Bar).
• A suitable Pressure Reducing Valve is to be installed
before the heater unit, should this 600 kPa
limit be exceeded.
• Heater manifold nut assembly must only to be tightened
with the spanner supplied in each box.
• All air to be vented from the heater unit prior to
connecting the 220 volt or 380 volt 50 Hz
power supply.
• A cut-off valve should be installed on the water inlet
line to the DAFI heater.
• All heater units for under sink installation can be
installed at any angle.
All plumbing accessories and electric connections are included
in the set.
Recommendations:
• Installing a composite pipe from your DAFI water heater
to the point of
usage will further reduce heat loss and save more energy.
• "Wonder" Delux Energy & Water saving capacity matched
showerhead
nozzles can be installed with the selected heater unit
for optimum
performance enhancement.
• Beware of over tightening of taps on the 3.7kW model.
Electric supply:
To be undertaken by a qualified Electrician
1. Each heater unit is to be wired to the Distribution Board
via the existing Earth Leakage System.
For recommended minimum power cable sizes from
the distribution board to the heater,
see point 4 below.
2. A suitably sized wall mounted electrical isolator to be
installed within 600mm above the heater unit.
3. A dedicated suitably sized breaker to be installed on the
Distribution Board for each heater unit.
4. Minimum 3 core cable sizes
- 2,5mm² for 3,7 kW, 4,5kW & 5,5 kW models
- 4,0m² for 7,3kW & 11,0kW models
5. Municipal bylaws require that a 30 amp X 3pole, or 60 amp
X 2pole electric isolator is installed at
the unit.
6. DAFI heater units are not to be connected to the electrical
supply by standard 3-point wall plug.
Water Filter Installation:
• The water pressure at point of installation should
be 50kpa to 600kpa or 0.5bar to 6.0bar.
• Water flow direction is as per arrow shown on top side
of black tube at the back of the filter lid.
• If required, the water flow direction can be changed
by removing the four chrome screws at the
rear of filter lid and rotating the tube.
• Filter cartridge to be inserted with the blue rubber
seal at the top end of filter housing.
• Ensure that the o ring is correctly seated, before
closing the filter.
• Use the spanner supplied for all locking and loosening
of components , metal tools will damage
the unit.
• Close the brass screw/ release valve, at the top of
filter lid, once the filter has filled with water.
This screw must be opened, to release the pressure
inside the filter, when changing cartridges.
• Fit the blue protective cover to the top of the filter,
to complete installation.
• If required, a cut-off valve can be fitted ahead of
the water feed to the DAFI filter.
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