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22 WILO SE 01/2009
3 Transport and interim storage
CAUTION! Danger of damage to the unit!
Danger of damage due to incorrect handling
during transport and storage.
Moisture, frost and mechanical stresses may
cause damage to the unit.
• The unit must be protected from moisture, frost
and mechanical damage during transport and
interim storage.
• During transport and interim storage, the unit
must not be exposed to temperatures outside
the range of -10 °C to +50 °C.
4Intended use
The RainSystem AF Comfort unit is designed for
pumping rainwater from an existing collector tank.
If there is insufficient rainwater, the unit switches
over automatically to potable water supply from
the potable water network via a replenishment
reservoir.
The main applications are:
• Toilet flushing
• Washing water supply
• Supplying water for garden watering and irrigation
The RainSystem AF Comfort unit must not be used
to supply rainwater as potable water.
WARNING! Health hazard!
The water supplied by the unit is rainwater, not
potable water. Rainwater is not potable water!
Direct connections between potable water and
rainwater networks are not permissible.
5 Product information
5.1 Type key
Example: Wilo-RainSystem AF Comfort MC 304 EM
AF-Comfort Automatic rainwater utilisation and potable
water replenishment system (Aqua Feed)
MC Self-priming, horizontal, multistage centrif-
ugal pump of the MultiCargo MC series
3 Volume flow [m³/h] at optimum efficiency
04 Number of stages
EM AC motor 1~230 V, 50 Hz
5.2 Technical data
Flow rate: Max. 5 m³/h
Delivery head: Max. 52 m (MC 305 pump) or 41.5 m (MC 304 pump)
Max. admissible operating pressure:
8 bar
Max. admissible intake pressure from the
collector tank:
1.4 bar
Noise pressure level: Up to 56 dB (A) airborne sound
(at 1 m distance from a unit mounted on a brick wall)
Suction head: Max. approx. 8 m; static max. 6 m
Water temperature:
+ 4 °C to + 35 °C
Max. admissible ambient temperature: 40 °C
Connected load/Frequency:
1~230 V/50 Hz
Protection class:
IP 54
Unit control: WILO RCE-System switchgear
Motor protection:
Integrated thermal motor protection
Measurement range of level sensor:
5.0 m Ws measurement range (water column of 0 ... 5 m)
Pressure port connection:
R 1" (female thread: union nut)
Suction port connection:
R 1" (male thread)
Connection for potable water supply:
R ¾" (male thread)
Max. potable water intake pressure at sole-
noid valve:
6 bar
Potable water flow capacity at solenoid
valve:
3 m³/h at 1.5 bar or 4.5 m³/h at 3 bar flow pressure
Capacity of replenishment reservoir: 11 l
Dimensions of replenishment reservoir
overflow channel:
105 mm x 65 mm; overflowing water can be led into the building drainage system
via a funnel not directly connected to the overflow (see Fig. 3)
Fitting dimensions: See Fig. 6
Weight (MC 304/MC 305):
38 / 40 kg (gross), 23.5 / 25.5 kg (net)
Ambient conditions: -0 °C to +40 °C
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