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Part number 550-100-325/0419
2
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
INSTALLER — Read all instructions before
installing. Read page 3 first. Follow all instruc-
tions in proper order to prevent personal injury
or death.
-
USER — Please read the following. Failure to
comply could result in severe personal injury,
death or substantial property damage.
This manual is for use only by your qualified
Hazards that will or can cause minor personal
injury or property damage.
Special instructions on installation, operation or
maintenance that are important but not related to
personal injury or property damage.
Hazards that will cause severe personal injury, death
or substantial property damage.
Hazards that can cause severe personal injury, death
or substantial property damage.
Hazard definitions
Contents Page
1 Please read before proceeding . . . . . . . . . . . . . 3
2 Prepare boiler location . . . . . . . . . . . . . . . . . . 4
3 Prepare boiler . . . . . . . . . . . . . . . . . . . . . . . 6
4 Converting boiler to propane . . . . . . . . . . . . . 10
5 Gas piping — sizing gas lines . . . . . . . . . . . . . 14
6 Venting/air piping — general. . . . . . . . . . . . . . 15
7 Commonwealth of Massachusetts installations . . . 18
8 Vent termination requirements. . . . . . . . . . . . . 19
9 Boiler room air openings. . . . . . . . . . . . . . . . 20
10 DIRECT VENT — Sidewall with separate pipes . . . 21
11 DIRECT VENT — Sidewall concentric . . . . . . . . 23
12 DIRECT VENT — Vertical with separate pipes. . . . 25
13 DIRECT VENT — Vertical concentric. . . . . . . . . 27
14 DIRECT VENT — Vertical vent /sidewall air . . . . . 29
15 Concentric termination, typical (sidewall or vertical) . . 31
16 Vent and air piping and boiler connections . . . . . 32
17 Install water piping . . . . . . . . . . . . . . . . . . 35
Domestic Water Piping – Combi Boiler . . . . . . . . . 35
Recirculation (if used) . . . . . . . . . . . . . . . . . . 37
18 Primary/Secondary System Piping . . . . . . . . . . . . 39
System water piping methods . . . . . . . . . . . . . . 39
Expansion Tank Location . . . . . . . . . . . . . . . . 39
Diaphragm- or bladder-type tank: . . . . . . . . . . . . 39
Closed-type expansion tank: . . . . . . . . . . . . . . 41
Install relief valve . . . . . . . . . . . . . . . . . . . . . 42
Zone Valve zoning – primary/secondary . . . . . . . . 43
Circulator zoning – primary/secondary. . . . . . . . . 44
Circulator zoning – Multiple temperature zones with
primary/secondary . . . . . . . . . . . . . . . . . . . . 45
19 Multiple boiler installations . . . . . . . . . . . . . . 46
20 Install condensate line . . . . . . . . . . . . . . . . 49
21 Gas piping . . . . . . . . . . . . . . . . . . . . . . . 50
22 Field wiring. . . . . . . . . . . . . . . . . . . . . . . 52
23 Wiring diagram — AB-80/120C Combi Ladder . . . . 54
23 Wiring diagram — AB-80/120C Combi Schematic. . . 55
24 Wiring diagram — AB-80/120H Heating Only Ladder. . 56
24 Wiring diagram — AB-80/120H Heating Only Schematic . 57
25 Wiring diagram — AB-155C Combi Ladder . . . . . . . . . 58
25 Wiring diagram — AB-155C Combi Schematic . . . . . . . 59
26 Wiring diagram — AB-155H Heating Only Ladder . . . . . 60
26 Wiring diagram — AB-155H Heating Only Schematic . . . 61
27 Controls and operation . . . . . . . . . . . . . . . . 62
28 DHW Settings (Combi Only) . . . . . . . . . . . . . 67
29 Standard Altitude . . . . . . . . . . . . . . . . . . . 69
30 High Altitude . . . . . . . . . . . . . . . . . . . . . . 70
31 Startup — Quick Start Guide using default settings 73
32 Startup . . . . . . . . . . . . . . . . . . . . . . . . . 75
33 Startup — nal checks . . . . . . . . . . . . . . . . 78
34 Startup verication . . . . . . . . . . . . . . . . . . 84
35 Annual startup and general maintenance . . . . . . 85
36 Annual startup . . . . . . . . . . . . . . . . . . . . . 86
37 Troubleshooting . . . . . . . . . . . . . . . . . . . . 89
38 Maintenance . . . . . . . . . . . . . . . . . . . . . .111
39 Replacement parts . . . . . . . . . . . . . . . . . 120
40 Connections, Dimensions and Engineering Data . 132
41 Ratings . . . . . . . . . . . . . . . . . . . . . . . . 135
42 Installation and Service Certicate. . . . . . . . . 136
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