Contents
The ECO Series 2 Gas-fired water boilers . . . . . . . . . . . 2
Please read before proceeding . . . . . . . . . . . . . . . . 7
Boiler location
. . . . . . . . . . . . . . . . . . . . . . . . . 8
Wall-mounting the boiler. . . . . . . . . . . . . . . . . . . 10
Display bracket installation . . . . . . . . . . . . . . . . . 12
Boiler hydrostatic test . . . . . . . . . . . . . . . . . . . . 13
Converting boiler to propane — ECO 70. . . . . . . . . . . 15
Converting boiler to propane — ECO 110 . . . . . . . . . . 17
Converting boiler to propane — ECO 155 . . . . . . . . . . 19
Gas piping — sizing gas lines . . . . . . . . . . . . . . . . 21
Venting/air piping — general . . . . . . . . . . . . . . . . 22
Commonwealth of Massachusetts installations . . . . . . 25
Vent termination requirements . . . . . . . . . . . . . . . 26
Boiler room air openings. . . . . . . . . . . . . . . . . . . 27
DIRECT VENT — Sidewall with separate pipes . . . . . . . 28
DIRECT VENT — Sidewall concentric . . . . . . . . . . . . 30
DIRECT VENT — Sidewall with W-M vent/air plate . . . . . 32
DIRECT VENT — Vertical with separate pipes. . . . . . . . 34
DIRECT VENT — Vertical concentric. . . . . . . . . . . . . 36
DIRECT VENT — Vertical vent /sidewall air . . . . . . . . . 38
Concentric termination, typical (sidewall or vertical). . . . 40
Vent and air piping and boiler connections . . . . . . . . . 41
Install water piping . . . . . . . . . . . . . . . . . . . . . 42
Direct Connect System Piping . . . . . . . . . . . . . . . . 43
Verify the application will work. . . . . . . . . . . . . . . . . . 41
Expansion tank location. . . . . . . . . . . . . . . . . . . . . . 41
Diaphragm- or bladder-type tank. . . . . . . . . . . . . . . . . 41
Closed-type expansion tank . . . . . . . . . . . . . . . . . . . 42
System water piping methods . . . . . . . . . . . . . . . . . . 43
Install relief valve . . . . . . . . . . . . . . . . . . . . . . . . . 43
ZONE VALVE zoning – direct connection
. . . . . . . . . . . . . 44
Primary/Secondary System Piping . . . . . . . . . . . . . 47
Expansion tank location. . . . . . . . . . . . . . . . . . . . . . 45
Diaphragm- or bladder-type tank. . . . . . . . . . . . . . . . . 45
Closed-type expansion tank . . . . . . . . . . . . . . . . . . . 46
System water piping methods . . . . . . . . . . . . . . . . . . 47
Install relief valve . . . . . . . . . . . . . . . . . . . . . . . . . 48
ZONE VALVE zoning – primary/secondary . . . . . . . . . . . . . . . 51
CIRCULATOR zoning – primary/secondary . . . . . . . . . . . . . . 50
CIRCULATOR zoning – primary/secondary multi. temp. zone . . . . 51
Multiple boiler installations . . . . . . . . . . . . . . . . . 54
Install condensate line . . . . . . . . . . . . . . . . . . . . 58
Gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Field wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Wiring diagram — schematic . . . . . . . . . . . . . . . . 64
Wiring diagram — ladder . . . . . . . . . . . . . . . . . . 65
EXPRESS SETUP — using default settings . . . . . . . . . 66
ECO control operation
. . . . . . . . . . . . . . . . . . . . 67
ESSENTIAL settings . . . . . . . . . . . . . . . . . . . . . 69
ECO control settings menus . . . . . . . . . . . . . . . . . 70
BOILER SETTINGS menu . . . . . . . . . . . . . . . . . . . 71
HEATING SETTINGS menu . . . . . . . . . . . . . . . . . . 72
DHW SETTINGS menu . . . . . . . . . . . . . . . . . . . . 74
CIRCULATOR EXERCISING and FREEZE PROTECTION . . . . 75
DIAGNOSTIC menu . . . . . . . . . . . . . . . . . . . . . . 76
DATE AND TIME menu
. . . . . . . . . . . . . . . . . . . . 78
Startup — fill the system . . . . . . . . . . . . . . . . . . 79
Startup — final checks . . . . . . . . . . . . . . . . . . . 81
Check-out/startup verification. . . . . . . . . . . . . . . . 87
Annual startup and general maintenance . . . . . . . . . . 88
Annual startup . . . . . . . . . . . . . . . . . . . . . . . . 89
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 95
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 103
Cleaning heat exchanger flue side, 70. . . . . . . . . . . . 105
Cleaning heat exchanger flue side, 110 . . . . . . . . . . . 108
Cleaning heat exchanger flue side, 155 . . . . . . . . . . . 111
Replacement parts . . . . . . . . . . . . . . . . . . . . . . 114
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Ratings — ECO Series 2 boilers . . . . . . . . . . . . . . . 127
Ratings — Multiple ECO Series 2 boilers . . . . . . . . . . 128
Installation and Service Certificate . . . . . . . . . . . . . 129
ECO Series 2 Gas Boiler Data Collection Sheet . . . . . . . 130
DO NOT SERVICE THE
BOILER WITHOUT AN
ECO
MAINTENANCE KIT AVAILABLE
The ECO maintenance kit includes components that may
have to be replaced when accessing or disassembling parts of
the boiler. Failure to replace damaged components and to use
only the parts specifically intended for the boiler can result in
severe personal injury, death or substantial property damage.
See Figure 119, page 115 for part number.
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels
or to important information concerning the life of the product.
Indicates presence of hazards that will cause severe
personal injury, death or substantial property
damage.
Indicates presence of hazards that can cause severe
personal injury, death or substantial property
damage.
Indicates presence of hazards that will or can
cause minor personal injury or property damage.
Indicates special instructions on installation,
operation or maintenance that are important
but not related to personal injury or property
damage.
Hazard definitions
Part number 550-142-190/1218
2
®
S
ERIES
2
G
AS
-
FIRED
WATER
BOILER
—
Boiler Manual
