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Weil-McLain ECO 70 Manual

Wall mount gas-fired water boilers
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TM
Wall Mount
Gas-Fired Water Boilers
70/110/155
Boiler Manual
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.
Part number 550-142-122/0513

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  • Page 1 Wall Mount Gas-Fired Water Boilers 70/110/155 Boiler Manual 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.

  • Page 2: The Eco Gas-Fired Water Boilers

    — Boiler Manual FIRED WATER BOILER The ECO Gas-fired water boilers The top left side knockouts are designated for line voltage wiring only. Ensure all wiring entrances are sealed. 3. Blower The advanced blower design and air inlet silencer on ECO Wall The top right side and bottom knockouts are designated for low Mount boilers result in very quiet operation.
  • Page 3 — Boiler Manual FIRED WATER BOILER The ECO Gas-fired water boilers (cont.) Part number 550-142-122/0513...

  • Page 4: Table Of Contents

    See Figure 109, page 107 for part number. Converting boiler to propane — ECO 70/110 ..13 Converting boiler to propane — ECO 155 ..15 Gas piping —...

  • Page 5: Please Read Before Proceeding

    Use only device shall be used. the products listed by Weil-McLain for use with this boiler. Sidewall vent air installations — see instruction on page 21. See page 76 for details.

  • Page 6: Boiler Location

    — Boiler Manual FIRED WATER BOILER Boiler location Locate or protect the boiler so it cannot be damaged by Installations must comply with: a moving vehicle. Local, state, provincial, and national codes, laws, regulations Ensure that the installation complies with all applicable and ordinances.
  • Page 7 — Boiler Manual FIRED WATER BOILER Boiler location (continued) Provide clearances for service Provide clearances from combustible access — RECOMMENDED materials — REQUIRED 1. See Figure 1 for recommended service clearances. 1. See Figure 2 for REQUIRED minimum clearances. ALL installa- tion must provide at least these minimums.

  • Page 8: Wall-Mounting The Boiler

    Styrofoam protective base kit and parts) Cardboard cap, bottom The operating weights for wall-mountable boilers are: ECO 70 or ECO 110: ECO 155: Wall-mount bracket and studs Failure to comply with above and the procedure given below could result in severe personal injury, death or substantial property damage.
  • Page 9 3 Boiler mounting studs— The V-groove on the wall-mount bracket will help guide the studs into the slots. The studs are attached to the back of floor is available from Weil-McLain. See kit instructions (available the boiler. on website) details. See “BOILER ACCESSORIES” on page 107 for 4 Floor surface part number information.

  • Page 10: Display Bracket Installation

    — Boiler Manual FIRED WATER BOILER Display bracket installation Determine display unit location Display installation on junction box 1. Boiler display unit can be mounted on either the right side of the 1. Ensure mounting location follows guidelines in para- boiler jacket or on the wall in close proximity to the boiler graph 3 of “Determine display unit location”.

  • Page 11: Boiler Hydrostatic Test

    — Boiler Manual FIRED WATER BOILER Boiler hydrostatic test insert a ¾” NPT pipe plug in the relief valve tapping. . This After the hydrostatic test, this plug must be removed and the relief is the maximum allowable relief valve valve must be installed.
  • Page 12 — Boiler Manual FIRED WATER BOILER Boiler hydrostatic test (continued) Install pipe fittings for relief valve and Install piping components required for hydrostatic test ( pressure/temperature gauge — see legend below) (see legend below) (155 only) Piping to system (155 only) Piping from system 1 Boiler supply (outlet) connection, (male, 1”...

  • Page 13: Converting Boiler To Propane - Eco 70/110

    — Boiler Manual FIRED WATER BOILER Converting boiler to propane — ECO 70/110 Propane gas orifice bushing identification Prepare boiler for propane — 70 on left (may be stamped 3.85) 110 on right (may be stamped 4.45) ECO 70/110 only (if required) Propane operation —...
  • Page 14 — Boiler Manual FIRED WATER BOILER Converting boiler to propane — ECO 70/110 (cont.) Installing the propane gas orifice bushing (some details omitted for clarity) 7. See Figure 12. Insert the propane gas orifice bushing (item 4) into the gas valve outlet as shown.

  • Page 15: Converting Boiler To Propane - Eco 155

    — Boiler Manual FIRED WATER BOILER Converting boiler to propane — ECO 155 Propane gas orifice identification Prepare boiler for propane — ECO 155 only (if required) Propane operation — For a boiler already installed, you must turn off gas supply, turn off power and allow boiler to cool before proceeding.
  • Page 16 — Boiler Manual FIRED WATER BOILER Converting boiler to propane — ECO 155 (cont.) Installing the propane gas orifice bushing (some details omitted for clarity) Gas valve and venturi for Figure 14 and Figure 15 Venturi (leave venturi attached to blower) (3) hex-head screws, 5 mm hex (remove and retain) Honeywell gas valve Air silencer (leave connected to venturi)

  • Page 17: Gas Piping - Sizing Gas Lines

    Minimum gas pressure, with gas flowing (verify during boiler startup, while boiler is at high fire): Equivalent lengths of straight pipe for ECO 70: 3½” (89 mm) w.c. typical gas line fittings ECO 110: 4½” (114 mm) w.c. ECO 155: 3½” (89 mm) w.c.

  • Page 18: Venting/Air Piping - General

    — Boiler Manual FIRED WATER BOILER Venting/air piping — general Do not install the ECO boiler into a common vent with any other appliance. This will cause flue gas spillage or ap- Install air inlet piping for the ECO boiler pliance malfunction, resulting in possible severe personal as described in this manual.
  • Page 19 Maximum vent lengths apply for either 2” or 3” vent and air pipe. If using 2” pipe, provide 3”x 2” reducers at boiler connections and at Weil-McLain vent/air cap or at concentric terminations. Boilers will derate as vent/air pipe length increases — see rating data on Figure 122, page 119 for derate amounts.
  • Page 20 BIRD SCREEN at each termination the bird screens. Purchase bird screens separately from Weil-McLain or vent kit supplier if not included. [Note — bird screening is integral to the 3” PVC Weil-McLain sidewall vent cap, available for purchase from Weil-McLain.

  • Page 21: Commonwealth Of Massachusetts Installations

    — Boiler Manual FIRED WATER BOILER Commonwealth of Massachusetts installations Commonwealth of Massachusetts — When the boiler is installed within the Commonwealth of Massachusetts, the boiler must be installed by a licensed plumber or gas fitter. Read and comply with the instructions below. (a) For all sidewall horizontally-vented gas-fueled equipment .

  • Page 22: Vent Termination Requirements

    — Boiler Manual FIRED WATER BOILER Vent termination requirements The vent termination must be located to meet all requirements below (also applies to vertical vent terminations). For Canadian installations, defer to the requirements of CSA B149.1 or B149.2 Installation Code. Part number 550-142-122/0513...

  • Page 23: Boiler Room Air Openings

    — Boiler Manual FIRED WATER BOILER Boiler room air openings Combustion and ventilation air openings for Direct Vent installations The ECO boiler CANNOT be in the same space with other appliances if clearances around the ECO are less than the recommended service clearances shown in Figure 1, page 7.

  • Page 24: Direct Vent - Sidewall With Separate Pipes

    — Boiler Manual FIRED WATER BOILER DIRECT VENT — — Separate pipes sidewall Use only the vent materials and kits listed in Figure 20, page 20. Provide pipe adapters if specified. 1. Locate the termination such that the total air piping and vent piping from the boiler to the termination will not exceed the maximum length given in Figure 19, page 19.
  • Page 25 3. Use the provided paper template for correct location of hole centers. 4. Use of a sidewall termination plate is REQUIRED. a. Kits for several vent sizes are available from Weil-McLain. See “VENT/AIR PARTS AND KITS” on page 107. b. Plate may be field fabricated from corrosion resistant material of sufficient strength.

  • Page 26: Direct Vent - Sidewall Concentric

    — Boiler Manual FIRED WATER BOILER DIRECT VENT — — Concentric horizontal 1. The concentric termination kit must be purchased separately. Use only the vent materials and kits listed in Figure 20, page 20. Provide pipe adapt- ers if specified. 2.
  • Page 27 — Boiler Manual FIRED WATER BOILER DIRECT VENT — (continued) See notices on previous page. Termination location — concentric termination — multiple boilers — clearance from vent of one to air intake of the next 1. Assemble the vent termination as described for concentric termi- nations, on page 34.

  • Page 28: Direct Vent - Sidewall With W-M Vent/Air Plate

    1. When terminating multiple ECO boilers, termi- Prepare the sidewall penetrations and secure the sidewall plates as nate each vent/air connection as described in this instructed in this section. See “Install Weil-McLain vent/air cap” on manual. page 29. All vent pipes and air inlets must ter-...
  • Page 29 flue pipe and air pipe. Level the template with a level. Hole preparation in wall — INSIDE VIEW For the Weil-McLain plate, the template must be level to (use template provided) ensure the flue and air pipe will be side-to-side, as shown in Figure 31.

  • Page 30: Direct Vent - Vertical With Separate Pipes

    — Boiler Manual FIRED WATER BOILER DIRECT VENT — Separate pipes vertical termination Use only the vent materials and kits listed in Figure 20, page 20. Provide pipe adapt- ers if specified. 1. Locate the terminations such that the total air pip- ing and vent piping from the boiler to the termina- tion will not exceed the maximum length given in Figure 19, page 19.
  • Page 31 — Boiler Manual FIRED WATER BOILER DIRECT VENT — (continued) See notices on previous page. Terminations for multiple boilers 1. Air pipe penetration: a. Cut a hole for the air pipe. Size the air pipe hole as close as desired to the air pipe outside diameter. 2.

  • Page 32: Direct Vent - Vertical Concentric

    — Boiler Manual FIRED WATER BOILER DIRECT VENT — — Concentric vertical 1. The concentric termination kit must be purchased separately. Use only the vent materials and kits listed in Figure 20, page 20. Provide pipe adapt- ers if specified. 2.
  • Page 33 — Boiler Manual FIRED WATER BOILER DIRECT VENT — (continued) See notices on previous page. Vertical termination — 3” PVC concentric — single or multiple boilers 2. Place roof penetrations to obtain minimum clearance of 12 inches between the edges of adjacent vent pipes of other boil- ers for U.

  • Page 34: Concentric Termination, Typical (Sidewall Or Vertical)

    — Boiler Manual FIRED WATER BOILER Concentric termination, typical (sidewall or vertical) concentric termination assembly — DO NOT attach the rain cap until the termination has been Inner PVC pipe (vent) Bird screen inserted through the roof or wall and all supports Outer PVC pipe (air) Y fitting have been installed.

  • Page 35: Vent And Air Piping And Boiler Connections

    — Boiler Manual FIRED WATER BOILER Vent and air piping and boiler connections Follow termination instructions Boiler vent and air connections 1. Read and follow all instructions for the termination type used before proceeding with this page. Follow all instructions provided by vent pipe manufacturer.

  • Page 36: Install Water Piping

    — Boiler Manual FIRED WATER BOILER Install water piping Use two wrenches when tightening water piping Suggested pipe sizing for system headers at boiler, using one of the wrenches to prevent and zone piping — RESIDENTIAL with the boiler interior piping from turning. Failure to baseboard, convectors or cast iron radiators support the boiler piping connections to prevent ONLY (20°F temperature rise)

  • Page 37: Direct Connect System Piping

    — Boiler Manual FIRED WATER BOILER Direct Connect System Piping Diaphragm- or bladder-type expansion tank— Verify the application will work: Control fill pressure with the tank air charge For systems requiring a higher flow than that pressure. Always check pressure and charge tank recommended in Figure 41 −...

  • Page 38: Closed-Type Expansion Tank

    fill pressure, should not exceed 24 PSIG to avoid weeping of relieve valve. Pressure drop through heat 4.00 exchanger (graph and table) 3.50 ECO 70 or 110 ECO 155 3.00 Flow Rate Head Loss Flow Rate Head Loss (GPM) (ft.

  • Page 39: System Water Piping Methods

    — Boiler Manual FIRED WATER BOILER Direct Connect System Piping (continued) System water piping methods 1. See Figure 43 for the head loss through the boiler. Use boiler head loss values to size pump after determining other piping head loss values. 1.

  • Page 40: Install Relief Valve

    — Boiler Manual FIRED WATER BOILER Direct Connect System Piping (continued) Install relief valve 1. Install relief valve in 1 ” x 1 ” x ¾” (for 70/110) or 1 ¼” x 1 ¼” x ¾” (for 155) reducing tee piped from boiler supply (Figure 8, page 12). 2.

  • Page 41: Zone Valve Zoning - Direct Connection

    2. The boiler and zone valves can also be operated by a Use isolation relays if connecting 3-wire zone valve end Weil-McLain WMZV zone controller. switches to the HEAT input. This is a common legend for all piping diagrams, not all items listed appear in every figure.

  • Page 42: Primary/Secondary System Piping

    — Boiler Manual fired water boiler Primary/Secondary System Piping Expansion Tank Location Figure 46 Piping to diaphragm (or bladder) expansion tank Figures 46 and 47 show typical installation of the system expansion tank. It is highly recommended that you locate the air separator and expansion tank as shown in the sug- gested piping drawings on pages 47 - 49.

  • Page 43: Expansion Tank Location

    — Boiler Manual FIRED WATER BOILER Primary/Secondary System Piping Closed-type expansion tank: Piping to closed-type expansion tank DO NOT use a closed-type tank if connect- ing to a water heater that is equipped with an automatic air vent. Figure 47, page 43 shows suggested piping when using a closed-t y p e expansion tank, in which the air is directly in contact w ith tank water.

  • Page 44: Closed-Type Expansion Tank

    — Boiler Manual FIRED WATER BOILER Primary/Secondary System piping (continued) System water piping methods Estimated head loss of boiler loop piping and recommended circulators. 1. Connect boiler to system only as shown in Figure 46 and Figure 47, page 44. The primary/secondary piping shown ensures the boiler loop will have sufficient flow.

  • Page 45: System Water Piping Methods

    — Boiler Manual FIRED WATER BOILER Primary/Secondary System piping (continued) Install a system circulator or zone circulators as shown in the piping diagrams in the Primary/Secondary System Piping section in this manual. These circulators must be supplied by the installer. 1.

  • Page 46: Install Relief Valve

    — Boiler Manual FIRED WATER BOILER Primary/Secondary System piping (continued) Install relief valve 1. Install relief valve in 1 ” x 1 ” x ¾” (for 70/110) or 1 ¼” x 1 ¼” x ¾” (for 155) reducing tee piped from boiler supply piping tee (Figure 8, page 12).

  • Page 47: Zone Valve Zoning - Primary/Secondary

    2. The boiler and zone valves can also be operated by a valve end switches to the HEAT input. Weil-McLain WMZV zone controller. This is a common legend for all piping diagrams, Not all items listed appear in every figure.

  • Page 48: Circulator Zoning - Primary/Secondary

    56 , for instructions on wiring to circulators. 2. The boiler and circulators can also be operated by a Weil-McLain WMCR zone controller. This is a common legend for all piping diagrams, not all items listed appear in every figure.

  • Page 49: Circulator Zoning - Primary/Secondary Multi. Temp. Zone

    1. The ECO control can be used to control space heating only, domes- control. tic water heating only, or both. Refer to field wiring, beginning on page 56, for instructions on wiring to circulators. 2. The boiler and circulators can also be operated by a Weil-McLain WMCR zone controller. Part number 550-142-122/0513...

  • Page 50: Multiple Boiler Installations

    — Boiler Manual FIRED WATER BOILER Multiple boiler installations Side-to-side mounting of multiple ECO boilers Placing multiple boilers — OR — 1. Locate multiple boilers with spacings shown in Figure 53. Calculate required cross section (for area in square 2. Provide indicated clearances around boilers for access and inches): servicing.
  • Page 51 FIRED WATER BOILER Multiple boiler installations (continued) Sequencing multiple ECO boilers 1. Use a multiple-boiler controller, such as the Weil-McLain BCP, BMC or BSC, to sequence boilers. Locate temperature sensors as required in the controller manual. Easy-Fit® piping installation 1. Main header and Easy-Fit® Manifold pipe sizing.
  • Page 52 — Boiler Manual FIRED WATER BOILER Multiple boiler installations (continued) Piping schematic — typical piping for multiple ECO boilers, using Weil-McLain Easy-Fit manifolds 1 Flow/check valve 11 Check valve or backflow preventer, as required by applicable codes 12 Cold water supply...
  • Page 53 2. DHW tanks are zoned with circulators as shown. 2. Pipe from the near-boiler piping to the DHW tank’s 3. DHW circulators should be controlled with a Weil-McLain boiler connections as shown in Figure 50, page 47. WMCR zone controller.

  • Page 54: Install Condensate Line

    3.2 to 4.5). Install a neutralizing filter when draining into metal pipe and if required by local codes. See Replacement parts section at the end of this manual for the Weil-McLain kit. Part number 550-142-122/0513...

  • Page 55: Gas Piping

    3. Install 100% lockup gas pressure regulator in supply line if inlet pressure can exceed 13” (330 mm) w.c. at 1. See Figure 86, page 80 (ECO 70/110) or Figure 87, page 81 (ECO any time. Adjust lockup regulator for 13” (330 mm) 155) for location of the gas inlet pressure test port.

  • Page 56: Field Wiring

    — Boiler Manual FIRED WATER BOILER Field wiring The installation must com- Wiring must be N.E.C. ply with: National Electri- Class 1. If original wiring — For your safety, turn off electrical cal Code and any other as supplied with boiler must power supply at service en- national, state, provincial or be replaced, use only type...
  • Page 57 — Boiler Manual FIRED WATER BOILER Field wiring Low voltage: Back of display circuit board - 1. Mount multi-hole cord grip (provided) to desired low voltage 4-pin terminal knockout and secure with a locknut. 2. Thermostat, aquastat, limit devices, and outdoor temperature sensor wire pairs should be routed through the cord grip.
  • Page 58 — Boiler Manual FIRED WATER BOILER Field wiring (continued) Line voltage wiring (120 VAC) input and output connections (120 VAC) Make the following line-voltage connections, some of which depend on your system and how the ECO control will be programmed. The callouts below refer to Figure 64.
  • Page 59 — Boiler Manual FIRED WATER BOILER Field wiring (continued) Low voltage wiring (24 VAC) input and output connections Make the following low-voltage connections, some of which depend on your system and how the ECO control will be programmed. The callouts below refer to Figure 65. The ECO control provides inputs for one DHW zone (priority) and one heating zone.

  • Page 60: Wiring Diagram - Schematic

    — Boiler Manual FIRED WATER BOILER Wiring diagram — schematic schematic wiring diagram (see Figure 67, page 61 for legend and notes) Part number 550-142-122/0513...

  • Page 61: Wiring Diagram - Ladder

    — Boiler Manual FIRED WATER BOILER Wiring diagram — ladder ladder wiring diagram (see Figure 66, page 60 for schematic wiring diagram) Part number 550-142-122/0513...

  • Page 62: Express Setup - Using Default Settings

    — Boiler Manual FIRED WATER BOILER EXPRESS SETUP — using default settings 9. If the system is piped using primary/secondary system pip- — The ing, reference the following pages for piping and control following settings must be checked and adjusted suggestions: if necessary: BOILER MODEL and HIGH AL- a.

  • Page 63: Eco Control Operation

    — Boiler Manual FIRED WATER BOILER ECO control operation Control sequence of operation — You must ensure that the ECO control is set for the proper water temperatures for the system. Excessive water temperature can cause status significant property damage in some applications. (also see Figure 70, page 64) —...
  • Page 64 — Boiler Manual FIRED WATER BOILER ECO control operation (continued) ECO control display screens and typical navigation Part number 550-142-122/0513...

  • Page 65: Essential Settings

    — Boiler Manual FIRED WATER BOILER ESSENTIAL settings . Failure to comply could result in incorrect operation of the boiler, causing possible severe personal injury, death or sub- stantial property damage. Step 1 Read about menu access and navigation If the boiler model number shown does NOT match the boiler, the selection MUST be changed on page 66.

  • Page 66: Eco Control Settings Menus

    — Boiler Manual FIRED WATER BOILER ECO control settings menus ECO control menu access — accessing contractor menus 5. The CONTRACTOR MENU screen will show: Control menus — OVERVIEW 1. Access contractor menus by pressing and holding the UP and DOWN arrow keys at the same time for 7 seconds.

  • Page 67: Boiler Settings Menu

    — Boiler Manual FIRED WATER BOILER BOILER SETTINGS menu menu (see Figure 73 for setting values and descriptions) 2. The HIGH LIMIT TEMPERATURE setting will automatically return to 200°F if power is turned off. The boiler will restart when power is restored. 3.

  • Page 68: Heating Settings Menu

    — Boiler Manual FIRED WATER BOILER HEATING SETTINGS menu menu (see Typical outdoor reset curves Figure 77, page 70 for setting values and descriptions) HEATING SETTINGS 1. The heating settings menu is for setting control operation during space heating. The settings apply to zones controlled 1.
  • Page 69 — Boiler Manual FIRED WATER BOILER HEATING SETTINGS menu (continued) SUPPLY MAX OD RESET MIN SUPPLY MIN OD RESET MAX Temp Temp Temp Temp Fan-coil Cast iron baseboard Cast iron radiators Radiant – slab on grade Radiant – thin slab Radiant –...

  • Page 70: Dhw Settings Menu

    — Boiler Manual FIRED WATER BOILER HEATING SETTINGS menu (continued) menu (see Figure 71, page 66 for access information) Units Value Value °F SUPPLY MAX Required supply temp. at system design max. load °F SUPPLY MIN Minimum supply temp. for system OD RESET MAX °F Outdoor temp.

  • Page 71: Circulator Exercising And Freeze Protection

    — Boiler Manual FIRED WATER BOILER DHW SETTINGS menu (continued) Setting MAX ON TIME to off will cause the control to never switch to space heating while DHW call for heat 1. The temperature must drop this many degrees below is present.

  • Page 72: Diagnostic Menu

    — Boiler Manual FIRED WATER BOILER DIAGNOSTIC menu menu navigation (see Figure 71, page 66 for access information) Menus Follow information at the bottom of each screen to navigate to next/previous screen or enter/save data DIAGNOSTICS TEMPERATURES STATUS: ########## BOILER OUT1: ###°F BOILER OUT2: ###°F...
  • Page 73 — Boiler Manual FIRED WATER BOILER DIAGNOSTICS menu (continued) menu details (see Figure 80, page 72 for access information) Units Value Value To reset all history and counters to zero: Enter the DIAGNOSTICS menu. Then press and hold the left and right arrows located below the display. Hold for 3 seconds. This will cause ALL history and counters to be deleted.

  • Page 74: Date And Time Menu

    — Boiler Manual FIRED WATER BOILER DIAGNOSTICS menu (continued) menu details (continued) (see Figure 80, page 72 for access information) Units Value Value To reset all history and counters to zero: Enter the DIAGNOSTICS menu. Then press and hold the left and right arrows located below the display. Hold for 3 seconds. This will cause ALL history and counters to be deleted.

  • Page 75: Startup - Fill The System

    Startup — fill the system 1. You must thoroughly flush the system (without boiler 1. Use only antifreeze listed by Weil-McLain as suitable for use with ECO Gas Boilers. See Figure 109, page 107 for connected) to remove sediment. The high-efficiency heat information.
  • Page 76 Weil-McLain boilers. Do not apply these products or instructions for other 4. Follow instructions on antifreeze container to determine the amount applications.

  • Page 77: Startup - Final Checks

    — Boiler Manual FIRED WATER BOILER Startup — final checks Inspect/fill condensate system Check for gas leaks 1. Inspect the condensate drain line, condensate PVC fittings and Before starting the boiler, and during initial operation, condensate trap. (See page 54 for component locations.) use a leak detector or smell near the floor and around the boiler for gas odorant or any unusual odor.
  • Page 78 1. Verify boiler has been converted for propane. See page 13 for Inspect vent piping and air piping for signs of deteriora- ECO 70 or 110 or page 15 for ECO 155. tion from corrosion, physical damage or sagging. Verify air piping and vent piping are intact and correctly installed per this manual.
  • Page 79 — Boiler Manual FIRED WATER BOILER Startup — final checks (continued) Operating instructions (WARNING — Verify that the ECO control is set for the correct boiler model before proceeding.) Part number 550-142-122/0513...
  • Page 80 AUTO. DO NOT adjust throttle on low fire. into the boiler enclosure. Failure to com- ply could result in severe personal injury, 7. Consult your local Weil-McLain representative if acceptable results death or substantial property damage. cannot be obtained for both high and low fire.
  • Page 81 AUTO. DO NOT adjust throttle on low fire. be leakage, follow the procedure for checking 7. Consult your local Weil-McLain representative if acceptable results the heat exchanger-to-condensate dish seal on cannot be obtained for both high and low fire.

  • Page 82: Check-Out/Startup Verification

    DHW aquastat, if installed, to desired DHW storage tem- instructions in this manual to install the propane perature)? orifice bushing. See page 13 for ECO 70 or 110 or page 15 for ECO 155. Failure to comply could re- ❏...

  • Page 83: Annual Startup And General Maintenance

    — Boiler Manual FIRED WATER BOILER Annual startup and general maintenance Follow the service and maintenance procedures given throughout this manual and in component literature shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or system. Failure to follow the directions in this manual and component literature could result in severe personal injury, death or substantial property damage.

  • Page 84: Annual Startup

    “Crystalline silica inhaled in the form of quartz or cristobalite from a. Inspect the heat exchanger and clean if necessary (see page 100, ECO 70 or 110, or page 103, ECO 155, for access and cleaning occupational sources is carcinogenic procedures).

  • Page 85: Address Reported Problems

    — Boiler Manual FIRED WATER BOILER Annual startup (continued) Clean condensate trap The boiler should be inspected and 1. See Figure 90. started annually, at the beginning of the heating season, only by a qualified 2. Disconnect top nut that secures the trap body to the boiler service technician.
  • Page 86 — Boiler Manual FIRED WATER BOILER Annual startup (continued) Do not use automatic air vents in systems with closed- Check air openings type tanks. The air will escape from the system instead of returning to the tank. 1. Verify that combustion and ventilation air openings to the boiler room and/or building are open and un- Eventually, the tank will waterlog and no longer con- obstructed.

  • Page 87: Check Control Settings

    Check control settings ure 80, page 72 for the complete Diagnostics menus). 2. The flame signal value must be at least 75 for a ECO 70 or 1. Use the ECO control display to navigate through all settings. 110, or at least 160 for the ECO 155. If the flame signal drops Adjust settings if necessary.
  • Page 88 — Boiler Manual FIRED WATER BOILER Annual startup (continued) Check blower speeds Firing rates and corresponding blower speeds (low fire, ignition, and high fire) — for altitudes up to 5,500 feet 1. For installations at altitudes above 5,500 feet, make and high altitude (above 5,500 feet) sure the control is set up for high altitude in the boiler setup menu.

  • Page 89: Check Boiler Relief Valve

    — Boiler Manual FIRED WATER BOILER Annual startup (continued) Check boiler relief valve Reinstall jacket door after servicing 1. Inspect the relief valve and lift the lever to verify flow as in the following warnings, excerpted from a relief valve manufac- turer’s warning label.

  • Page 90: Troubleshooting

    — Boiler Manual FIRED WATER BOILER Troubleshooting VERIFY PROPER OPERATION AFTER SERVICING VERIFY PROPER OPERATION AFTER SERVICING BEFORE TROUBLESHOOTING — BEFORE TROUBLESHOOTING — BEFORE TROUBLESHOOTING — Before calling for troubleshooting assistance, fill in the “ ” (page 122). 1. See Figure 93 for tools and kits recommended for troubleshoot- ing ECO boilers.

  • Page 91: Checking Temperature Sensors

    — Boiler Manual FIRED WATER BOILER Troubleshooting (continued) Control fuses Check ECO control fuses ALWAYS check ECO control fuses before replacing ECO Line Voltage control or any major components (blower, etc.). If one of these fuses is blown, it can prevent ECO control or other components from operating.
  • Page 92 — Boiler Manual FIRED WATER BOILER Troubleshooting (continued) ECO control fault indications 1. The ECO control provided diagnostic 2. Figure 96 shows the screen behavior 4. Figure 98, page 94 lists conditions that information for automatic reset con- during an automatic or manual reset will cause the fault screen operations.
  • Page 93 — Boiler Manual FIRED WATER BOILER Troubleshooting (continued) Troubleshooting suggestions for ECO boilers — The ECO control is able to record information about the boiler’s condition at the time of the three previous faults or errors. This information is available to view in Contractor Menus under “DIAGNOSTICS” by selecting “ERRORS.” The control will display the following information: Information Description...
  • Page 94 — Boiler Manual FIRED WATER BOILER Troubleshooting (continued) Troubleshooting suggestions for boilers — Condition Diagnostics Corrective Action(s) Display Control is not receiving Check wiring for short circuit or Correct wiring per wiring diagram including connection of transformer Nothing shown 24V power incorrect wiring.
  • Page 95 Inspect vent system for abnormal wear or damage. Reset using manual reset screen on display. Contact Weil-McLain Technical Support. Occurs if low water cutoff Automatic reset occurs if contacts Check for low water condition in system. Repair system as necessary LOW WTR contacts open.
  • Page 96 — Boiler Manual FIRED WATER BOILER Troubleshooting Troubleshooting (continued) (continued) Troubleshooting suggestions for boilers — Condition Diagnostics Corrective Action(s) Display Boiler temperature sensor Reset using manual reset screen HIGH TEMP on display. LIMIT setting (no higher than Verify all isolation valves are open and circulators are connected to the control module properly.
  • Page 97 — Boiler Manual FIRED WATER BOILER Troubleshooting (continued) Troubleshooting suggestions for boilers — Condition Diagnostics Corrective Action(s) Display IGNITION Boiler went through 5 Automatically resets after 1 hour Check condensate trap for blockage allowing condensate to accumulate FAULT ignition attempts and never or can be reset by performing inside heat exchanger.

  • Page 98: Maintenance

    — Boiler Manual FIRED WATER BOILER Maintenance Oiled bearing circulators DO NOT SERVICE THE BOILER 1. Check circulators in the system. Oil any circulators requiring WITHOUT A ECO MAINTENANCE oil, following circulator manufacturer’s instructions. Over- KIT AVAILABLE oiling will damage the circulator. The ECO maintenance kit includes components that may have to be replaced when accessing or disassembling parts of the boiler.
  • Page 99 1. Isolate the boiler from the heating system. 2. Obtain Sentinel X400 cleaner from Weil-McLain. Follow instruc- tions supplied with the cleaner to clean the boiler heat exchanger. Use ONLY the cleaning product available from Weil- McLain, Sentinel X400.

  • Page 100: Cleaning Heat Exchanger Flue Side, 70/110

    — Boiler Manual FIRED WATER BOILER Cleaning heat exchanger flue side, 70/110 Cleaning the ECO 70 or 110 heat Legend for Figure 105 exchanger FLUE SIDE or accessing the burner, if required Boiler interior Heat exchanger cover plate Boiler interior, with Ignitor assembly The boiler contains ceramic fiber materials.
  • Page 101 — Boiler Manual FIRED WATER BOILER Cleaning heat exchanger flue side, 70/110 (continued) Accessing the burner or heat exchanger (see Legend on page 100) Part number 550-142-122/0513...
  • Page 102 — Boiler Manual FIRED WATER BOILER Cleaning heat exchanger flue side, 70/110 (continued) using a torque wrench. The screws must be secure, but the torque must not exceed 20 inch-pounds. 1. See Figure 105, page 101 part D. 4. Apply a ring of silicone adhesive on the cover plate (to secure a.

  • Page 103: Cleaning Heat Exchanger Flue Side, 155

    — Boiler Manual FIRED WATER BOILER Cleaning heat exchanger flue side, 155 removing the two ” locknuts attaching them. This will Cleaning the ECO 155 heat exchanger 5/16 make removing the cover plate significantly easier. FLUE SIDE or accessing the burner, 4.
  • Page 104 — Boiler Manual FIRED WATER BOILER Cleaning heat exchanger flue side, 155 (continued) DO NOT gouge or crack the refractory. The re- fractory is made of ceramic fiber materials. Read Legend for Figure 107 the ceramic fiber WARNING on page 84 before Boiler interior Air silencer clip handling or disposing of ceramic fiber materials.
  • Page 105 — Boiler Manual FIRED WATER BOILER Cleaning heat exchanger flue side, 155 (continued) Accessing the burner or heat exchanger (see Legend on page 104) Do NOT attempt to remove the burner from the heat exchanger cover plate without first remov- ing the heat exchanger cover plate from heat exchanger.

  • Page 106: Replacement Parts

    The ECO maintenance kit includes components WEIL-McLAIN that may have to be replaced when accessing or Replacement parts must be purchased through a local Weil-McLain disassembling parts of the boiler. Failure to replace distributor. When ordering, specify boiler model and size and include damaged components and to use only the parts description and part number of replacement part.
  • Page 107 (includes components for concentric assembly) 383-700-167 Kit for 2” PVC vent and air pipes..ECO 70/110 maintenance kit — igniter, 383-700-165 383-500-350 Kit for 3” PVC vent and air pipes..
  • Page 108 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Jacket parts — ECO 70/110/155 (see Figure 111, page 109 for illustration) Item Name Description / contents Part Number Jacket door Jacket door and labels 383-800-216 Seals – jacket door to cabinet...
  • Page 109 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Jacket assembly — ECO 70/110/155 (see Figure 110, page 108 for part numbers) Part number 550-142-122/0513...
  • Page 110 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Heat exchanger parts ECO 70/110 (see Figure 113, page 111 for illustration) Item Name Part Number Heat exchanger 383-800-234 Heat exchanger with condensate dish, assembled (includes items 100, 120, 130, and 140)
  • Page 111 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Heat exchanger assembly ECO 70/110 (see Figure 112, page 110 for part numbers) Part number 550-142-122/0513...
  • Page 112 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Heat exchanger parts ECO 155 (see Figure 115, page 113 for illustration) Item Name Part Number Heat exchanger 383-800-231 Heat exchanger with condensate dish, assembled (includes items 100, 160, 170 and 180) 383-800-232 Heat exchanger, condensate dish, cover plate, burner, igniter, sight glass, refractory, water sensors, gaskets, silicone, and hardware...
  • Page 113 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Heat exchanger assembly ECO 155 (see Figure 114, page 112 for part numbers) Part number 550-142-122/0513...
  • Page 114 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Combustion components for ECO 70/110 (see Figure 118, page 115 for illustration) Model Item Name Description / contents Part Number Relief valve  36,* UHOLHI YDOYH ² VKLSSHG ORRVH IRU ¿HOG LQVWDOODWLRQ 383-500-095 Pressure &...
  • Page 115 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Combustion components for ECO 70/110 /155(see Figure 116, page 114 for part numbers) 70/110 Part number 550-142-122/0513...
  • Page 116 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Controls and electrical components — ECO 70/110/155 (see Figure 120, page 117 for illustration) Item Name Description / contents Part Number Flue temperature sensor One sensor 511-724-292 Outdoor temperature sensor One sensor...
  • Page 117 — Boiler Manual FIRED WATER BOILER Replacement parts (continued) Controls and electrical assemblies — ECO 70/110/155 (see Figure 119, page 116 for part numbers) Part number 550-142-122/0513...

  • Page 118: Dimensions

    — Boiler Manual FIRED WATER BOILER Dimensions Dimensional data — ECO 70/110/155 (all dimensions in inches) 1 Boiler supply tapping — 1” NPT 5 Vent connection: 3” PVC 2 Boiler return tapping — 1” NPT 6 Gas connection 3 Control display and navigation buttons...

  • Page 119: Ratings - Eco Boilers

    AFUE are certified by AHRI. AFUE due to the pressure loss through the is also know as Annual Fuel Utilization ECO 70 or 110 vent/air pipes can be piping. For vent/air pipe lengths less Efficiency or Seasonal Efficiency. either 2” or 3”...

  • Page 120: Ratings - Multiple Eco Boilers

    12.1 Operating weight is the total weight of the 17.1 boiler, including water. 15.1 ECO 70 or 110 vent/air pipes can be either 2” or 3” pipe. 21.4 11.7 ECO 155 vent/air pipes must be 3”. 18.1 All of the boilers will automatically de-rate 25.6...

  • Page 121: Installation And Service Certificate

    — Boiler Manual FIRED WATER BOILER Installation and Service Certificate Boiler Model / Series ________ / Series ____ Date installed ________________ @: High fire ______% Low fire ______% CP Number ____________ FUEL: Natural ____ LP ____ Btu Input ___________________ CO @: High fire ____ ppm Low fire ____ ppm Flame signal on control display at high fire __________________ Flame signal on control display at low fire __________________ Was orifice changed? _________...

  • Page 122: Eco Gas Boiler Data Collection Sheet

    — Boiler Manual FIRED WATER BOILER ECO Gas Boiler Data Collection Sheet Contact: Name: Contractor: Phone: Job name: Model: City, state: CP#: Distributor: Installed: Near boiler pipe size: DHW tank (yes/no): DHW direct/system: DHW model: DHW pipe size: DHW circulator model: Is there air in system?: Control fault: Ignition retries:...

  • Page 123: Notes

    — Boiler Manual FIRED WATER BOILER NOTES Part number 550-142-122/0513...
  • Page 124 — Boiler Manual FIRED WATER BOILER Part number 550-142-122/0513...

This manual is also suitable for:

110155Eco 110Eco 155

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