DeLonghi AWR-MTD2-XE, Installation, Operation And Service Manual

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10 AWR-MTD2-XE EN 11/2010
WATER CONNECTIONS I A
Water content in the system
Size 0011 0025 0031 0041 0051 0061 0091
Minimum water content l 24 31,5 40 46 65 74 110
Expansion vessel size
Size 0011 0025 0031 0041 0051 0061 0091
Expansion vessel l 2 2 2 2 2 4 4
Safety valve calibration
Size 0011 0025 0031 0041 0051 0061 0091
Safety valve bars 6 6 6 6 6 6 6
Factory connections Installer connections
1
2
12
12
13
14
14
UTILITY
RETURN
UTILITY
OUTLET 9
8
7
16
3
11
T
6
15
16
T
6
F
5
4
2
10
1
1
9
Utility water circuit connection diagram
1 Pressure gauge
2 Vibration damper joint
3 Shut off valve
4 Calibrating valve
5 Flow switch
6 Thermometer
7 Pump
8 Safety
valve
9 Expansion vessel
10 Wire mesh filter
11 Unit fill/drain valve
12 Temperature
sensor
13 Differential pressure switch
14 Drain / chemical washing valve
15 System
vent
Condensate drain
In heating mode the unit produces a significant quantity of
condensate, which must be suitably drained.
Proceed as follows:
• Connect the unit condensate drain
• Make sure the drain hose has a incline of at least 2 cm/m,
without obstructions or choking.
• Connect the condensate drain hose to a rainwater drain.
Do not connect to the sewage system as odours may be
sucked up if the water in the drain trap evaporates.
• After connecting, check correct drainage of the conden-
sate by pouring water into the pan.
• If necessary, suitably insulate the condensate drain hose.
• Condensate drainage must not cause problems to objects
or people.
• If the outside air temperature is less than 0°C, the conden-
sate may freeze.
The unit comes with frost protection for the condensate col-
lection basin inside the unit.
Use hot wires on the condensate drain hose downstream of
the unit to protect against frost.
FILLING THE SYSTEM
- Before starting to fill, place the unit mains
switch QF1 in the OFF position.
- Before filling, check that the system drain
valve is closed.
- Open all system and terminal air vents.
- Open system shut off valves.
- Start filling by slowly opening the system water fill valve out-
side the unit.
- When water begins to leak out of the terminal air vent valves,
close them and continue filling until the pressure gauge indi-
cates a pressure of 1.5 bar.
The system must be filled to a pressure of between 1
and 2 bars.
It is recommende d that this operation be repeated after
the unit has been operating for a number of hours. The
pressure in the system should be checked regularly and
if it drops below 1 bar, the water content should be
topped-up.
Check the tightness of the joints.
ON
OFF