PB Heat 211A manual Install Controls and Trim, Install Safety Valves Install LOW Water CUT-OFFS

Page 34

INSTALL CONTROLS AND TRIM

8. INSTALL CONTROLS AND TRIM

A. INSTALL SAFETY VALVE(S)

C. INSTALL LOW WATER CUT-OFF(S)

1.Pipe the pop safety valve(s) in the 3" tappings located on the right or left end sections. Make sure the relief valve sizing meets local code requirements.

CAUTION

Pipe the discharge of the Safety Relief Valve(s) away from any traffic area, preferably to a floor drain. This is necessary to prevent injury should the valve discharge.

Pipe the discharge full size of valve outlet.

B.INSTALL BLOWDOWN VALVES

1.Install a 1-1/2" full port ball valve in each of the tappings provided at the lower back of the end sections. See Figure 8.1.

2.Pipe the valve discharge to a floor drain if available or apply a nipple and cap to close off when not in use.

Figure 8.1: Blowdown Valve Piping

1.Mount the float type low water cut-off and gauge glass in the tappings provided in the front of either end section.

2.Do not apply piping which would raise or lower the location of the cut-off relative to the tappings in the boiler. Raising the water level over the design height will cause water carryover to the system.

3.For correct location of typical low water cut-off/feeder or low water cut-off/pump control, see Figures 8.3 through 8.6.

4.Mount the probe type low water cut-off supplied with the boiler. The end sections have 3/4" tappings in the front for mounting the probe low water cut-off auxiliary control. See Figure 3.3.

a.The standard probe control is Hydrolevel Model 650P. This control is automatic reset type.

b.When a manual reset control is required, the boiler can be supplied with Hydrolevel Model 550P.

5.Provide each float low water cut-off with a blowdown valve. Pipe the blowdown away from traffic to a floor drain if available. The blowdown valve is required for proper maintenance of the control.

6.Maintain a height of 40-1/2" (1029 mm) from boiler foundation to the normal water level.

7.When using multiple float type Controls: Always pipe the controls off of the same tappings to the boiler. Do not mount on different ends of the boiler or in different tappings. This can cause erratic operation and nuisance problems with the controls.

D.INSTALL PRESSURE CONTROLS

1.Pipe the Steam Pressure Gauge and Boiler Limit and Operating Pressure Controls as shown in Figure 8.2. Connect the control assembly to the 1/2" tapping on the right end of the boiler.

CAUTION

Make sure that the gas ignition system components, electrical controls, junction boxes and electrical panels are protected from water (dripping, spraying, rain, etc.) during boiler operation and service (circulator or pump servicing, control replacements or other).

32

Page 33 Page 35
Image 34
Page 33 Page 35
Contents Series 211A Table of Contents Controls Using this ManualFollow the Piping Guidelines Special Attention BoxesCombustible Construction Clearances PreinstallationAccessibility Clearances AIR for Combustion and VentilationRequired Volume fan = 15 ft Required Volume other =21 ft Btu/hr 22 cm 2 per 2000 W of total rated Input for all appliances in the space. SeeMechanical Combustion Air Supply Chimney or VentWhere Combustion Air DuctsVent Sizing Exterior VentsCombined vent breeching Installation Survey Boiler SettingWater Quality and MAKE-UP Boiler Foundation Layout Assemble the Base Base AssemblyCrate Items Install the Pilot Burners For 211A-04 through 211A-08 OnlyBase Front and Back Panel Crates Model Overall LengthTypical Gas Manifold and Pilot Line Assembly Pilots Total Natural Gas Only Propane Gas Only Model NumberBurners Preparation Place the Boiler SectionsPlacing the Sections Assembling Sections on Base Hydrostatic Test the Boiler Align Sections VerticallyInstall the Flue Collector Do not tighten yetBoiler Position Supply Piping Pipe the BoilerReturn Piping Pipe the Boiler Equalizers Multiple Boiler InstallationsBoiler Header End Risers Model SizePiping Multiple Boilers, Typical, Gravity Return Systems Prepare the Parts Install the Jacket & Draft HoodApply Cleanout Cover Plates Apply Jacket END AssembliesApply Jacket TOP Panels Apply Lower END PanelsApply Plates and Labels Top Panel GG-6024 Carton Contents Sub-Assembly Part Number Quantity Jacket Assembly Sequence Carton Numbers and Locations 13C Connect GAS Piping Install GAS TrainInstall Vent and Bleed Piping Connect Pilot GAS TubingInstall GAS Supply Piping Test GAS Supply PipingPipe Length 4 Pipe 2 Pipe Specific Gravity Multiply Capacity byInstall Blowdown Valves Install Controls and TrimInstall Safety Valves Install LOW Water CUT-OFFS Install Pressure ControlsPressure Control Piping Fittings Included with Boiler Standard Float Type COntrol, Model 67PE2 Optional Float Type Pump Control/Low Water Cut-Off, Model Application of 51 Feeders Install Control Wiring Wire the BoilerConnect Supply Wiring Prepare Remaining ControlsTypical Wiring Standard Controls Low Voltage Gas Valves Typical Wiring Standard Controls 120-Volt Gas Valves Starting the Boiler Check Boiler Controls Clean the BoilerMeter reading. Rate, Btu/Hr = F x H x To Light the Boiler To Shut Down the Boiler Lighting Instructions TypicalPilot Flame Failure Operation & Maintenance Placing Boiler in Operation Pilot and Burner FlamesWeekly Maintenance Monthly MaintenanceAnnual Maintenance Daily MaintenanceTroubleshooting Service Tips Problem Possible Cause Suggested RemedyCorrect Piping Boiler Ratings & Dimensions Boiler Rating InformationBoiler Ratings & Dimensions Chart continues on Series 211A Steam Boiler DimensionsSeries 211A Steam Boiler Dimensions Repair Parts Series 211A Description Part Selection Information Stock CodeBase Front Panel Cover Plate 26 660 mm Wide Base Panel Boiler Assembly Base Assembly Page Series 211A
Top Page Image Contents