N
Neutralisation system .........................................................25
Normal volume .....................................................................60
O
O2 content .....................................................15, 56, 58, 93
Operating panel .......................................................... 12, 31
Operating phase ......................................................... 36, 73
Operating pressure ............................................................16
Operating problems ...........................................................77
Operating volume ...............................................................60
Output ...................................................................................48
P
Parameter Level ..................................................................38
Power consumption ...........................................................15
Pre-fuse .................................................................................15
Pressure loss .......................................................................16
Pressure switch ........................................................... 13, 70
Program sequence .............................................................14
Pump control logic .............................................................46
R
Rating ............................................................................ 16, 41
Residual supply pressure ..................................................16
Return collector ...................................................................11
Return sensor ......................................................................12
Room air independent ......................................................... 8
S
Safety measures ................................................................... 8
Safety temperature limiter .................................................13
Safety temperature sensor ...............................................12
Sensor variables ..................................................................91
Sequence diagram .............................................................14
Service display ....................................................................63
Service interval ....................................................................63
Service life .............................................................................. 8
Service notification .............................................................63
Service set ............................................................................89
Servicing ...............................................................................62
Servicing interval .................................................................62
Shut down ............................................................................61
Shutdown time ....................................................................61
Siphon ........................................................................... 11, 25
Smell of flue gas ............................................................ 8, 77
Smell of gas ........................................................................... 8
Sound attenuator ................................................................11
Soundness test ...................................................................53
Spanner .................................................................................63
Spare part .............................................................................79
Special level .........................................................................44
Standard efficiency .............................................................16
Standards .............................................................................15
Standby loss ........................................................................17
Storage .................................................................................15
Supply collector ..................................................................11
Supply sensor ......................................................................12
Supply voltage .....................................................................15
System frost protection .....................................................47
T
Tap .........................................................................................47
Temperature .........................................................................15
Temperature differential ....................................................13
Temperature remote control .............................................45
Throughput limit ..................................................................16
Transport ....................................................................... 15, 20
Type key ................................................................................10
Type of gas ...........................................................................15
V
Venting ..................................................................................26
Voltage supply .....................................................................15
W
Warning code ......................................................................74
Warnings ..............................................................................72
Water connection ...............................................................24
Water content ......................................................................16
Water hardness ...................................................................22
Water level interlock .................................................. 12, 13
Water treatment ..................................................................23
Weight ...................................................................................19
Whistling noise ....................................................................77
Wiring diagram ............................................................ 29, 90
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
13 Key word index
83266502 • 1/2010-08 • La
95-95
