Index - Buderus 500 - 28/C Servicing Manual

Gas wall hung boiler condensing
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Index

box 288 Index
A
Adjust the output flow rate (applies to combination
boilers only)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 180
C
Check and replace the ionisation electrode
Check fan – activation 230V AC
Check fan – power supply cable (230 V AC)
Check fan – tacho cable
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 73
Check fan and/or replace
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 76
Check gas valve – electrical resistance of power
supply cable
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 167
Check the Buderus 24V AC external 3-way
valve – activation (1)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 212
Check the Buderus 24V AC external 3-way
valve – activation (2)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 228
Check the Buderus 24V AC external 3-way
valve – drive mechanism
Check the Buderus 24V AC external 3-way
valve – installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 227
Check the Buderus 24V AC external 3-way
valve – movement of the servomotor
Check the Buderus 24V AC external 3-way
valve – power supply cable
Check the by-pass valve
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 14
Check the flow, safety and DHW temperature sensors –
cables
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 112
Check the flow, safety and DHW temperature sensors
(applies to external cylinder only)
Check the flue-gas STL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 120
Check the flue-gas STL – cable
Check the gas valve – activation
Check the gas valve – internal electrical resistance
Check the gas valve – power supply plug
Check the glow ignitor – activation
Check the glow ignitor – power supply cable
Check the glow ignitor – resistance
Check the internal 3-way valve – activation
Check the internal 3-way valve – drive mechanism
Check the internal 3-way valve – movement of the servomotor
Check the internal 3-way valve – power supply cable
Check the ionisation circuit – earth (ground) lead
Check the ionisation electrode – cable
Check the ionisation electrode – short circuits
Check the pressure control valve
Check the pump – activation
Check the pump – mechanical restrictions
Check the pump – power supply cable
Check the pump – soiling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 97
Check/replace fuses (1)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 62
D
Draining the system
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 48
F
Filling the system and venting it of air
I
Initial startup
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . box 59
Internal 3-way valve – replace the servomotor
M
Measure and adjust the gas/air ratio
Measure the gas input pressure – static and dynamic
Measure the ionisation current
We reserve the right to make technical modifications
Servicing manual Gas condensing boiler Buderus 500-24/S, 500-24/C and 500-28/C • Issued 02/2006
. . . . . . . . . . . . . . . box 155
. . . . . . . . . . . . . . . . . . . . . . . . . box 66
. . . . . . . . . . . . . . . box 69
. . . . . . . . . . . . . . . . . . . . . . . . . . . box 221
. . . . . . . . . . . . . . . . . box 211
. . . . . . . . . . . . . . . . . . . . . . . . . box 220
. . . . . . . . . . . . . . . . . . . . box 104
. . . . . . . . . . . . . . . . . . . . . . . . . box 126
. . . . . . . . . . . . . . . . . . . . . . . . box 164
. . . . . . . . box 171
. . . . . . . . . . . . . . . . . box 161
. . . . . . . . . . . . . . . . . . . . . . box 130
. . . . . . . . . . . . . . box 137
. . . . . . . . . . . . . . . . . . . . . . box 134
. . . . . . . . . . . . . . . box 185
. . . . . . . . . box 195
. . . . . . . box 191
. . . . . . . . . . box 160
. . . . . . . . . . . . . . . . . . . box 151
. . . . . . . . . . . . . box 148
. . . . . . . . . . . . . . . . . . . . . . . . . box 85
. . . . . . . . . . . . . . . . . . . . . . . . . . . . box 91
. . . . . . . . . . . . . . . . . box 89
. . . . . . . . . . . . . . . . . . . . box 95
. . . . . . . . . . . . . . . . . . . . . box 52
. . . . . . . . . . . . . box 190
. . . . . . . . . . . . . . . . . . . . . box 233
. . . . . . box 230
. . . . . . . . . . . . . . . . . . . . . . . . . . box 143
R
Removal of casing
Replace plate heat exchanger
Replace the automatic air vent
Replace the Buderus 24V AC external 3-way
valve – drive mechanism
Replace the Buderus 24V AC external 3-way
valve – servomotor
Replace the burner
Replace the DBA control panel
Replace the flow NTC sensor and/or safety sensor
Replace the flue-gas STL
Replace the gas valve
Replace the glow ignitor
Replace the internal 3-way valve
Replace the internal 3-way valve – drive mechanism
Replace the pressure relief valve
Replace the pump
Replace the sight glass
Replace/clean condensate trap and syphon
Replace/clean the heat exchanger
S
Shutting down
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 43
T
Technical specifications
V
Vent the gas flow pipe
W
Wiring diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 287
box 181
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 47
. . . . . . . . . . . . . . . . . . . . . . . . . .box 269
. . . . . . . . . . . . . . . . . . . . . . . . . .box 242
. . . . . . . . . . . . . . . . . . . . . . . . . . .box 224
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 217
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 245
. . . . . . . . . . . . . . . . . . . . . . . . .box 281
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 129
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 174
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 140
. . . . . . . . . . . . . . . . . . . . . . . .box 203
. . . . . . . . . . . . . . . . . . . . . . . .box 275
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 101
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 253
. . . . . . . . . . . . . . .box 256
. . . . . . . . . . . . . . . . . . . . . .box 259
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .box 239
Buderus Ltd. • http://www.buderus-domestic.co.uk
9
. . . . . . . . .box 116
. . . . . . .box 198
77

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