Burnham MMII manual Internal Water Piping System Diagram

Page 7

Install pipe tee between circulator and boiler return along with second tee in supply piping as shown in Figure 4. Bypass should be same size as the supply and return lines with valves located in bypass and supply outlet as illustrated in Figure 4 in order to regulate water flow to maintain higher boiler water temperatures.

After the boiler is operational (reference Section VII. System Start-Up) set by-pass and boiler supply valves to half throttle position to start. Operate boiler until system water temperature reaches normal operating range.

Adjust valves to provide 180° to 200°F supply water temperature. Opening the boiler supply valve will raise system temperature, while opening the by-pass valve will lower system supply temperature.

G.A hot water boiler installed above radiation level must be provided with a low water cut-off device as part of installation.

If a low water cut-off is required, it must be mounted in the system piping above the boiler.

The minimum safe water level of a hot water boiler is just above the highest water containing cavity of the boiler; that is, a hot water boiler must be full of water to operate safely.

H.Oil, grease, and other foreign materials which accumulate in new hot water boilers and a new or reworked system should be boiled out, and then thoroughly flushed. A qualified water treatment chemical specialist should be consulted for recommendations regarding appropriate chemical compounds and concentrations which are compatible with local environmental regulations.

Figure 5: Recommended Piping for Combination Heating & Cooling (Refrigeration)

Systems

I.After the boiler and system have been cleaned and flushed, and before refilling the entire system add appropriate water treatment chemicals, if necessary, to bring the pH between 7 and 11.

It is required to perform a long term pressure test of the hydronic system, the boiler should first be isolated to avoid a pressure loss due to the escape of air trapped in the boiler.

To perform a long term pressure test including the boiler, ALL trapped air must first be removed from the boiler.

A loss of pressure during such a test, with no visible water leakage, is an indication that the boiler contained trapped air.

Figure 5a: Internal Water Piping System Diagram

Figure 6: Recommended Bypass Piping

7

Image 7
Contents 81404025R13-1/07 Price $3.00 MinutemanTable of Contents Dimensional Drawing Minimum Clearances to Combustible Surfaces Pre-InstallationIII. Water Piping and Trim II. Unpack BoilerDo not drop boiler. Do not bump boiler jacket against floor Page Internal Water Piping System Diagram Domestic Hot Water Ratings IV. Domestic Hot Water Performance and PipingRated Input Gas PipingSpecific Gravity Correction Factors Fitting Equivalent LengthsVent/Air Intake Length VI. Venting / Air Intake PipingComponent General GuidelinesBurnham Vent System Components Install Vent ConnectorInstall Vent Pipe, Burnham Gasket-Less Vent System Install Vent Pipe, GeneralInstall Vent Pipe, Burnham Gasketed Vent System Burnham Gasketed Vent Joint Detail Horizontal Through Wall Vent InstallationRecommended Horizontal Vent Installation Horizontal Vent Pipe Wall Penetration Vertical Through Roof Vent InstallationInstall Air Intake Pipe Vertical Vent InstallationVII. Electrical Wiring DiagramVIII. System Start-up Do not install an automatic fill valve with this boilerPrepare to check operation Operating Instructions Check Boiler High Limit Adjust gas input rate to boilerGas Flow Rate in Cubic Feet per Hour IX. Service Lubrication Main Burners and Combustion ChamberBurner and Flueway Cleaning Pilot Burner Location Differential Pressure Switch SettingsAvoid Breathing Fiber Particulates and Dust Page Page Cerafelt Gasketing not depicted Repair PartsHeat Exchanger Assembly Canopy/Blower AssemblyPage Page Base Assembly Page Page Jacket Assembly Domestic Water Tank Assembly Miscellaneous Trim and Controls Air Intake Terminal Vent Accessory CartonLimited Warranty