70/110/155 boiler manual s)nstallation s-aintenance gas-fired water boilers 70/110/155 part number...

Download 70/110/155 Boiler Manual s)NSTALLATION s-AINTENANCE Gas-Fired Water Boilers 70/110/155 Part number 550-142-122/0513

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  • Wall Mount Gas-Fired Water Boilers

    70/110/155

    Part number 550-142-122/0513

    This manual must only be used by a qualified heating installer/service technician. Read all instructions, includ- ing this manual and all other information shipped with the boiler, before installing. Perform steps in the order given. Failure to comply could result in severe personal injury, death or substantial property damage.

    Boiler Manual

    TM

    Brian PH Avail Phone

  • The ECO Gas-fired water boilers

    3. Blower The advanced blower design and air inlet silencer on ECO Wall Mount boilers result in very quiet operation. Air enters the boiler enclosure through the air intake adapter (16), flows through the enclosure, enters the air inlet silencer (5), then enters the blower. The blower pulls air through the silencer and pushes it into the venturi (6), where it mixes with gas before enter- ing the burner (11).

    The automatic gas valve senses the vacuum in the venturi (6) caused by flowing air and allows gas to flow when power is applied. A manual gas valve is shipped loose with the boiler. It allows shutting off the gas supply for servicing or shutdown. See instructions in this manual for manual gas valve installation.

    The horn-shaped air inlet silencer significantly reduces fan noise, providing exceptionally quiet operation.

    6. Venturi When air flows through the venturi, it creates a negative pressure. This vacuum pulls gas from the gas valve (4). Gas will only flow if air is flowing. The gas mixes with air in the venturi. The gas/air mixture then flows into the burner (11).

    This dual sensor monitors boiler outlet water temperature. The ECO control adjusts boiler firing rate so the outlet water temperature is correct, based on the calculated (if outdoor reset used — see page 119) or fixed target temperature.

    This sensor monitors return water temperature. The ECO control reduces or increases boiler input, depending on how close the return water temperature is to the outlet water temperature.

    The electronic display is used to configure boiler settings and monitor boiler operation. The buttons allow changing display mode, selecting and adjusting control settings, and resetting the control after lockout. This display can be mounted either on the boiler (as shown) or on the wall.

    Made with high-grade stainless steel construction, the burner uses pre-mixed air and gas. The burner and control provide modulat- ing firing.

    Manual gas valve is shipped loose. Other ½” NPT gas connection pipe and fittings external to boiler must be supplied by the installer.

    The control module responds to signals from the room thermostat, DHW aquastat (if used), boiler sensors (boiler return, boiler supply, flue temperature, and outdoor temperature, if used — see page 119). The control automatically adjusts blower speed (and gas flow rate) to match boiler output to space heating and/or DHW heating demand. The control provides for one heating zone and one DHW zone.

    The top left side knockouts are designated for line voltage wiring only. Ensure all wiring entrances are sealed.

    The top right side and bottom knockouts are designated for low voltage wiring only. Ensure all wiring entrances are sealed.

    Shipped loose for field piping. Pipe drain valve on reducing tee at the lowest point of return piping to boiler. See instructions in this manual.

    The outlet at the bottom of the condensate collection dish. This is where condensate is discharged from the boiler. The condensate trap assembly attaches here.

    The condensate trap assembly is field-installed, connected to the condensate trap nozzle as shown in this manual.

    The jacket door is sealed to the boiler assembly around its entire perimeter.

    Two screws secure the jacket door in place.

    The burner flame is ignited by applying a high voltage to the igni- tion electrode. This causes a spark (from electrode to ground). After ignition, the electrode measures flame signal.

    The quartz glass window provides a view of the burner surface, the flame, and the ignition electrode.

    This dual sensor monitors the flue gas exit temperature. The ECO control will shut down the boiler if flue gas temperature gets too hot. This protects the flue pipe and the heat exchanger from overheating.

    This rubber line connects the gas valve diaphragm reference chamber to the venturi intake to insure the valve senses the correct reference pressure.

    The 120V/24V transformer provides 24V to low voltage control circuitry. Do NOT splice wiring into transformer.

    The air baffle protects internal boiler components by diverting any incoming moisture or debris away from critical components. It must be temporarily removed while servicing the heat exchanger.

    Part number 550-142-122/0513 2

    TM

    GAS-FIRED WATER BOILER — Boiler Manual

  • The ECO Gas-fired water boilers (cont.)

    Part number 550-142-122/0513 3

    TM

    GAS-FIRED WATER BOILER — Boiler Manual

  • Contents The ECO Gas-fired water boilers. . . . . . . . . . . . . . . . 2

    Please read before proceeding . . . . . . . . . . . . . . . . 5

    Boiler location . . . . . . . . . . . . . . . . . . . . . . . . . 6

    Wall-mounting the boiler. . . . . . . . . . . . . . . . . . . . 8

    Display bracket installation . . . . . . . . . . . . . . . . . 10

    Boiler hydrostatic test . . . . . . . . . . . . . . . . . . . . 11

    Converting boiler to propane — ECO 70/110 . . . . . . . . 13

    Converting boiler to propane — ECO 155 . . . . . . . . . . 15

    Gas piping — sizing gas lines . . . . . . . . . . . . . . . . 17

    Venting/air piping — general . . . . . . . . . . . . . . . . 18

    Commonwealth of Massachusetts installations . . . . . . 21

    Vent termination requirements . . . . . . . . . . . . . . . 22

    Boiler room air openings. . . . . . . . . . . . . . . . . . . 23

    DIRECT VENT — Sidewall with separate pipes . . . . . . . 24

    DIRECT VENT — Sidewall concentric . . . . . . . . . . . . 26

    DIRECT VENT — Sidewall with W-M vent/air plate . . . . . 28

    DIRECT VENT — Vertical with separate pipes. . . . . . . . 30

    DIRECT VENT — Vertical concentric. . . . . . . . . . . . . 32

    Concentric termination, typical (sidewall or vertical). . . . 34

    Vent and air piping and boiler connections . . . . . . . . . 35

    Install water piping . . . . . . . . . . . . . . . . . . . . . 36

    Direct Connect System Piping . . . . . . . . . . . . . . . . 37 Verify the application will work. . . . . . . . . . . . . . . . . . 37

    Expansion Tank Location . . . . . . . . . . . . . . . . . . . . . 37

    Diaphragm- or bladder-type tank. . . . . . . . . . . . . . . . . 37

    Closed-type expansion tank . . . . . . . . . . . . . . . . . . . 38

    System water piping methods . . . . . . . . . . . . . . . . . . 38

    System circulators and zone circulators . . . . . . . . . . . . . 38

    System water piping methods . . . . . . . . . . . . . . . . . . 39

    Install relief valve . . . . . . . . . . . . . . . . . . . . . . . . . 40

    ZONE VALVE zoning – direct connection. . . . . . . . . . . . . . . 41

    Primary/Secondary System Piping . . . . . . . . . . . . . 42 Expansion Tank Location . . . . . . . . . . . . . . . . . . . . . 43

    Diaphragm- or bladder-type tank. . . . . . . . . . . . . . . . . 43

    Closed-type expansion tank . . . . . . . . . . . . . . . . . . . 44

    System water piping methods . . . . . . . . . . . . . . . . . . 45

    Install relief valve . . . . . . . . . . . . . . . . . . . . . . . . . 46

    ZONE VALVE zoning – primary/secondary . . . . . . . . . . . . . . 47

    CIRCULATOR zoning – primary/secondary . . . . . . . . . . . . . . 48

    CIRCULATOR zoning – primary/secondary multi. temp. zone . . . . 49

    Multiple boiler installations . . . . . . . . . . . . . . . . . 50

    Install condensate line . . . . . . . . . . . . . . . . . . . . 54 Gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . 55

    Field wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 56

    Wiring diagram — schematic . . . . . . . . . . . . . . . . 60

    Wiring diagram — ladder . . . . . . . . . . . . . . . . . . 61

    EXPRESS SETUP — using default settings . . . . . . . . . 62

    ECO control operation . . . . . . . . . . . . . . . . . . . . 63

    ESSENTIAL settings . . . . . . . . . . . . . . . . . . . . . 65

    ECO control settings menus . . . . . . . . . . . . . . . . . 66

    BOILER SETTINGS menu . . . . . . . . . . . . . . . . . . . 67

    HEATING SETTINGS menu . . . . . . . . . . . . . . . . . . 68

    DHW SETTINGS menu . . . . . . . . . . . . . . . . . . . . 70

    CIRCULATOR EXERCISING and FREEZE PROTECTION . . . . 71

    DIAGNOSTIC menu . . . . . . . . . . . . . . . . . . . . . . 72

    DATE AND TIME menu . . . . . . . . . . . . . . . . . . . . 74

    Startup — fill the system . . . . . . . . . . . . . . . . . . 75

    Startup — final checks . . . . . . . . . . . . . . . . . . . 77

    Check-out/startup verification. . . . . . . . . .

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