COMPONENTS AND ACCESSORIES
1.5
Each boiler includes No. 2 ROBERTSHAW 24V gas valves.
1.5.2
BOILER COMPONENTS
4
1.5.1
GAS VALVES USED
- On-off switch
- Flue damper assembly with motor
- Twin solenoid gas valves with pressure regulators
- Multi-bar atmospheric gas burner in stainless steel with venturi
- Pilot burners with intermittent operation specific for ionisation
- Ionisation controls
- Ignition and ionisation electrodes
- Illuminated burner lockout reset push-buttons
- Control thermostat
- Overrun relay
- High limit thermostats
- Thermometer
- External flue hood
- Unassembled casing
- Contacts arrangement for external controls
- Option to operate in the “two stage” or in the “on/off” mode
- Option to select either burner to operate for minimum output
BOILER MODEL
152
169
186
203
220
237
255
272
No. of sections
9
10
11
12
13
14
15
16
Volume of combustion chamber
m
3
0.087
0.096
0.106
0.115
0.125
0.135
0.144
0.154
Exchange surface
m
2
12.2
13.9
15.6
17.3
19.0
20.7
22.4
24.1
Flue gas mass flow
g/s
133
142
148
151
156
199
196
193
Flue temperature
°C
110
112
115
117
121
110
115
119
Electrical supply
230 V - 50 Hz - 40W
Weight
Kg
810
880
950
1,030
1,100
1,180
1,250
1,320