Weil-McLain 550-110-260/02002 7a Start-up preparation, Determine if water treatment is needed

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Boiler Manual

7a Start-up — preparation

Determine if water treatment is needed

Fill the system with water

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to boiler will occur, resulting in substantial property damage.

Eliminate all system leaks. Continual fresh makeup water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron, and causing section failure.

Verify water chemistry

Consult local water treatment companies for unusually hard water areas (above 7 grains hardness) or low pH water conditions (below 7.0). Boiler water pH of 7.0 to 8.5 is recommended.

Freeze protection (when used)

Use antifreeze made especially for hydronic systems.

Inhibited propylene glycol is recommended.

Do not use ethylene glycol, automotive or undiluted

antifreeze. Severe personal injury or death can result.

1.Determine antifreeze quantity according to system water content. Boiler water content is listed on page 59. Remember to include expansion tank water content.

2.Follow antifreeze manufacturer's instructions.

3.A 50% solution of propylene glycol/water provides maximum protection to about -30 °F.

4.Local codes may require back flow preventer or actual disconnect from city water supply.

5.When using antifreeze in a system with automatic fill, install a water meter to monitor water makeup. Glycol will leak before the water begins to leak, causing glycol level to drop. Added water will dilute the antifreeze, reducing the freeze protection level.

Check for gas leaks

Before starting the boiler, and during initial operation, smell near the floor and around the boiler for gas odorant or any unusual odor. Do not proceed with start-up if there is any indication of a gas leak. Repair any leak at once.

Propane boilers only — Your propane supplier mixes an odorant with the propane to make its presence detectable. In some instances, the odorant can fade, and the gas may no longer have an odor. Before start-up (and periodically thereafter), have the propane supplier verify the correct odorant level in the gas.

1.Close manual and automatic air vents and boiler drain cock.

2.Fill to correct system pressure. Correct pressure will vary with each application. Typical cold water fill pressure for a residential system is 12 psi.

3.Purge air from system:

a.Connect a hose to the purge valve (see drain valves, item 6, in suggested piping diagrams on pages 17 through 21, Figure 6 through Figure 11). Route hose to an area where water can drain and be seen.

b.Close the boiler or system isolation valve between the purge valve and fill connection to the system.

c.Close zone isolation valves.

d.Open quick-fill valve on cold water makeup line.

e.Open purge valve.

f.One zone at a time, open the isolation valves. Allow water to run through the zone, pushing out the air. Run until no noticeable air flow is present. Close the zone isolation valves and proceed with the next zone. Follow this procedure until all zones are purged.

g.Close the quick-fill water valve and purge valve and remove the hose. Open all isolation valves. Watch that system pressure rises to correct cold-fill pressure.

h.After the system has operated for a while, eliminate any residual air by using the manual air vents located throughout the system.

i.If purge valves are not installed in system, open manual air vents in system one at a time, beginning with lowest floor. Close vent when water squirts out. Repeat with remaining vents.

4.Open automatic air vent (diaphragm-type or bladder-type expansion tank systems only) one turn.

5.Open other vents:

a.Starting on the lowest floor, open air vents one at a time until water squirts out.

b.Repeat with remaining vents.

6.Refill to correct pressure.

Part number 550-110-260/0200

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Contents Page ① Control module How it worksPage Contents Installer Please read before proceedingUser 1a Prepare boiler location codes & checklist Residential garage installation 1b Prepare boiler location clearancesFlooring and foundation Removing from existing vent 1c Prepare boiler location vent systemAir contamination 1d Prepare boiler location contaminationCGs combustion air options 1e Prepare boiler location air openingsSizing air openings for CGs installations Inspect orifices and burners 2a Prepare boiler placement & setupOrifice replacement procedure Place boiler/crate near positionFill and pressure test 2b Prepare boiler pressure testPerform hydrostatic pressure test Prepare boiler for test3a Water piping general information Closed-type expansion tank Figure 3b Water piping single-zone systemExpansion tank Diaphragm-type or bladder-type expansion tank FigureConverted gravity or steam systems 3c Water piping multiple zonesTypical piping multiple-zone installations 3d Water piping low temp systems Temperature gauges Valve adjustmentFor radiant heating or converted gravity systems Primary/secondary preferred bypass piping3e Water piping low temp systems Boiler-bypass alternate piping 3f Water piping low temp systems 3f system-bypass alternate piping 3g Water piping refrigeration systemPrevent chilled water from entering boiler Connecting gas supply piping to boiler Venting and combustion airGas piping Length Natural GasJunction Box furnished Field wiringWiring connections ThermostatCheck for gas leaks Freeze protection when used7a Start-up preparation Determine if water treatment is needed7b Start-up operate boiler 7a Start-up preparation7c Start-up if boiler doesn’t start Check burner flamesCheck for Installation and service certificate Check-out procedure checklistRaise room thermostat to call for heat 9a Operation sequenceSchematic wiring diagram 9b Operation wiring diagramsService 9c Operation lighting instructions For Your Safety Read Before OperatingService technician 10a Service and maintenance schedule10b Service & maintenance annual start-up Inducer motor Burners, base and inlet air boxBoiler heating surfaces Condensate drain system10b Service & maint. annual start-up Lever must be operated AT Least Boiler relief valveReview with owner Before troubleshooting 11a Troubleshooting procedureCheck pressure switch setting 11b Troubleshooting air pressure switchControl indicator lights lockout modes 11c Troubleshooting control moduleControl module connections Chart 1 Troubleshooting Power light status 11d Troubleshooting control module lightsChart 2 Tstat Circ & Power lights flashing Chart 3 Press Switch & Power lights flashing Chart 4 Flame & Power lights flashing Turn OFF Power to boiler at service switch or breaker Does blower motor operate? Verify Sequence of operation, , 12a Replacement parts Page Page Page Page Page Dimensional drawing 13a DimensionsDOE 13b RatingsRemoval of Combustion Chamber Lining or Base Panels Handling ceramic fiber and fiberglass materials

550-110-260/02002 specifications

Weil-McLain is a well-known manufacturer of high-quality heating systems and boiler solutions, and the 550-110-260/02002 model is a testament to the company's commitment to innovation and performance. This particular boiler is designed for commercial and residential applications, providing exceptional heating efficiency and reliability.

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