3.4.
Safety Devices
Flame Failure Safety System
Boiler Over-
Heat Safety System (95 °C)
DHW (Domestic Hot Water) Over-
Heat System (71°C)
High Water Pressure Protection System (3 bar)
Low Water Pressure Protection System (0.4 bar)
Low Voltage Protection System (170 VAC)
Thermal Accumulation Protection System (with by-
pass
circuit and ‘’pump over
-
run’’)
Frost Protection System for both CH and DHW circuit
Domestic Hot Water Flow Control (only for HM Model)
Pump Anti-sticking Function
3 Way Valve Anti-sticking Function (except HCH
- HST
Model)
Automatic Air Vent
Expansion Vessel (8 liters)
Water ingress protection from flue
Annual Maintanence Reminder
4-
SETUP
4.1
.
Minimum Clearances
4.2
.
Dimensions
Figure
4
.Combi Mounting Clearances
a
b c d e
3.3
.3 HCH Model
11
12
1
10
9
8
2
3
4
15
16
5
14
13
6
7
Figure
3
.
HCH Boiler
1-
Main Exchanger
2-
Mixer
3-
Fan
4-
Silencer
5-
Pressure Sensor
6-
Condensate Trap
7-
Gas Valve
8-
CH Return Temperature Sensor
9-
CH Supply Temperature Sensor
10-
Ignition-Ionisation Electrode
11-
Flue Gas Sensor
12-
Rain
W
ater
C
ollection reservoir
13-
3 Bar Safety Valve
1
4- Outlet Manif
old
1
5- Condensing W
ate
r Hose
1
6- Rain
Water
Hose
4.2
.
1.
HM Model
a) CH flow
¾ʺ
(hot)
b)
DHW outlet ½ ʺ
(hot)
c)
Gas inlet ¾ ʺ
d)
DHW inlet ½ ʺ
(cold)
e)
CH return ¾ ʺ
(cold)
10
