Watts Aerco TAG-0072 GF-146-E Operation & Maintenance Manual page 151

AM Series Boilers and Water Heaters User Manual
CHAPTER 10 – MAINTENANCE
6 – High limit supply temperature switch
7 – Supply temperature sensor
9 – Flue gas temperature sensor
10 – High limit Flue gas temperature fuse
11 – Control Board Fuse – F1 5x20 3A
13 – Ignition electrodes
14 – Spark generator
15 – Return temperature sensor
16 – Modulating PWM fan
17 – Back flue preventer switch (Flapper valve
switch)
19 – Water pressure sensor
20 – Gas valve
22 – Detection electrode
28 – Blocked flue pressure switch
29 – Condensate blocked drain switch
32 – Main electrical switch
OMM-0100_E • GF-146 • 11/15/2019
Legend for Electrical Scheme
34 – Display
35 – IF 885 board (optional on 199 & 250) Fuse–
F1 5x20 3A
47 – Water flow meter
48 – Motorized valve (optional)
51 – Connection board
Fuse – F1 5X20 10A
Fuse – F2 5X20 10A
Fuse – F3 5X20 3A
Fuse – F4 5X20 3A
Fuse – F6 5X20 3A
RGPR – CH pump relay
RGPS – DHW pump relay
RPP1 – Local pump relayfor Burner 1 (MASTER)
RPP2 – Local pump relayfor Burner 2
RPP3 – Local pump relayfor Burner 3
RPP4 – Local pump relayfor Burner 4
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