PART. CODE DESCRIPTION REF. NOTE
321 997029 Operator coils (Sit Sigma)
331 998490 Central heating by-pass kit
332 998718 3-Way spring kit (C.H.)
333 998975 3-Way spring kit (D.H.W.)
334 998974 Heating actuator bush
351 998644 O-ring (A.A.V.)
352 998643 Auto Air Vent
353 998738 Gasket (pump head)
354 998961 Pump head AB
354 999207 Pump head CD
371 571547 Diaphragm (main flow switch)
372 571772 Magnet (main flow switch)
373 571771 Spring (main flow switch)
374 571770 Main flow switch top cap
375 998172 Main flow switch reed system
381 998716 Burner jet (full kit - NG) 12
382 998717 Burner jet (full kit - LPG) 12
NOTE DESCRIPTION
11 Not supplied as a spare part
12 Not illustrated
PART. NOTIFICATION OF CHANGES
Spares listed below are not interchangeable with those in Ed.1
6 999102 - Pipe (expansion vessel) - replaces code 998584 from serial number: 2320005600001
15 999103 - Pipe (flow) - replaces code 998815 from serial number: 2320005600001
29 999162 - Pump bracket - replaces code 998606 from serial number: 2320005600001
33 999091 - Pump (27kW) - replaces code 998336 from serial number: 2320005600001
39 999059 - Front cover - replaces code 998827 from serial number: 2320005600001
43 999245 - Pressure guage - replaces code 998625 from serial number: 2320005600001
44 998952 - Control panel - not listed on original drawing
48 999153 - High voltage wiring - replaces code 998859 from serial number: 2320005600001
68 999204 - Fan (23kW) - replaces code 998621 from serial number: 2320005600001
81 998019 - Pipe (safety valve outlet) - replaces code 573176 from serial number: 2320005600001
86 998433 - Burner jet (NG 1.30) - replaces code 998714 from serial number: 2320005600001
86 999103 - Pipe (flow) - replaces code 998815 from serial number: 2320005600001
92 999148 - Selector knob (comfort) - replaces code 998605 from serial number: 2320005600001
94 999406 - Cable (time clock) - not listed on original drawing
102 998963 - Panel (combustion chamber - R/H) - replaces code 998599 from serial number: 2320005600001
104 999245 - Pressure guage - replaces code 998625 from serial number: 2320005600001
108 999151 - Panel (sealed chamber - front) - replaces code 998610 from serial number: 2320005600001
333 998975 - 3-Way spring kit (DHW) - replaces code 571447 from serial number: 2320005600001
334 998974 - Heating actuator bush - replaces code 998013 from serial number: 2320005600001
354 999207 - Pump head (27kW) - replaces code 998961 from serial number: 2320005600001
45 998953 - Cable holder cover - not listed on original drawing
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