Features and technical data
Installation, use and maintenance manual – AY
7
1
1
FEATURES AND TECHNICAL DATA
1.1
FEATURES
1.1.1
Operation
The AY appliances are outdoor condensing boilers capa-
ble of producing hot water up to 88 °C.
The range includes three models: AY 35, AY 50, AY 100.
The boiler casing is approved to resist weathering with
particular regard to the action of UV rays.
The operation of the appliance is managed by one of the
following controls (Paragraph 1.5
p. 13):
▶
DDC control
▶
external request (chronothermostat, room thermostat
or other operating request)
When the heat supply is requested, the electronic board
starts the system water pump, the blower and then the
burner.
When the burner starts up, the flame detector checks that
the burner has ignited; in the event of a lack of flame, the
electronic control unit retries ignition several times and if
this fails, it stops the appliance and displays the lock-out.
The reset is manual.
In the event of abnormal overheating of the delivery, the
boiler is switched off. The limit thermostat has manual
reset.
1.1.2
Mechanical and thermo-hydraulic
components
▶
Integrated spiral single tube stainless steel heat ex-
changer.
▶
Premix modulating burner with 1:9 ratio (AY 35), 1:10
(AY 50), 1:20 (AY 100).
▶
Automatic air vent valve.
▶
High efficiency water pump.
▶
System drain tap.
▶
Water temperature probes.
▶
Condensate drain siphon.
▶
Check valve (only for AY 100).
▶
Flue gas exhaust duct with relevant terminal, for type
B53P configuration.
In the AY 100 the above components are double.
1.1.3
Control and safety devices
▶
Flue safety thermal fuse.
▶
Gas solenoid valve.
▶
Safety thermostat.
In the AY 100 the above components are double.
▶
Safety valve.
▶
Water differential pressure switch.
▶
Expansion tank.
▶
Outdoor temperature probe.
1.1.4
INAIL safety appliances
The kit is only available on appliances intended for the
Italian market.
1.2
DIMENSIONS
1.2.1
AY 35 and AY 50
Figure 1.2
Unit dimensions
A Flue gas outlet Ø 80 mm
465
572
1184
1284
141
235
A
Figure 1.3
Service plate - Hydraulic/gas connections detail
OUT Water outlet connection Ø 1 1/4" F
IN Water inlet connection Ø 1 1/4" F
SC Condensate discahrge connection (outside diameter 25 mm, inside
20 mm)
GAS Gas connection Ø 3/4" M
459
305
100
100
355
43
160
59
11
9
185
IN
GAS
OUT
SC