Table of Contents
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PFG
• Installation
• Service
Read all instructions before installing
This manual must only be used by a qualified heating installer/service technician.
Read all instructions before installing. Perform steps in the order given. Failure
to comply could result in severe personal injury, death or substantial property
damage.
Installer
Leave all instructions with boiler for future reference.
Any claims for damage or shortage in shipment must be filed immediately against
the transportation company by the consignee.
Owner
Installation and service must be performed by qualified contractor.
Gas-fired
water boiler
Series 7
• Operation
• Parts
For additional information,
refer to . . .
Control Supplement
Part No. 550-110-641/0605
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Table of Contents
Related Manuals for Weil-McLain PFG 7 Series
Summary of Contents for Weil-McLain PFG 7 Series
- Page 1 Gas-fired water boiler Series 7 • Installation • Operation • Service • Parts For additional information, refer to . . . Control Supplement Read all instructions before installing This manual must only be used by a qualified heating installer/service technician. Read all instructions before installing.
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Page 2: Table Of Contents
PFG S — B erieS Fired ater oiler oiler anual Contents Section I: Installation 2-14 Size and install gas piping ......10-11 Draft hood installation ........12 Codes ..............2 Spill switch installation ........12 Combustion air and ventilation openings.... 3 Damper installation ........... -
Page 3: Combustion Air And Ventilation Openings
PFG S — B erieS Fired ater oiler oiler anual Section I: Installation Combustion air and ventilation openings Select the boiler location Combustion air and ventilation openings must comply with Sec- • Consider all connections to boiler before selecting a location. tion 5.3, Air for Combustion and Ventilation, of National Fuel •... -
Page 4: Chimney Or Vent Requirements
Adjust thermostat so appliance can damage a masonry chimney. will operate continuously. Weil-McLain recommends the following to prevent e. Test for spillage at the draft hood relief opening after possible damage: 5 minutes of main burner operation. Use the flame of 1. -
Page 5: Boiler Foundation
PFG S — B erieS Fired ater oiler oiler anual Boiler foundation Placing the boiler 1. Remove boiler from shipping pallet. Do not drop boiler or bump Never install boiler on combustible flooring or jacket on floor or pallet. carpeting, even if a concrete or aerated foundation is used. -
Page 6: Boiler Piping Connections
Do not pipe the discharge to any place where freez- ing could occur. b) Must be installed on all PFG-8 boilers to meet ASME specifica- tions (low water cut-off not supplied by Weil-McLain). • No shutoff valve shall be installed between the c) May be required by certain state, local or territorial codes or relief valve and boiler, or in the discharge line. -
Page 7: Multiple Zoning
PFG S — B erieS Fired ater oiler oiler anual Multiple zoning Figure 2b Piping – Closed type expansion tank 1. Zone valves: a) Refer to zone valve manufacturer’s literature for wiring and application. A separate transformer is required to power zone valves. -
Page 8: Bypass Piping
PFG S — B erieS Fired ater oiler oiler anual Bypass piping Figure 3 Bypass piping is not normally required on any baseboard system. Bypass piping should be used for the following instal- lations. (Bypass, supply, and return piping should be same size.) 1. -
Page 9: External Heat Exchangers
PFG S — B erieS Fired ater oiler oiler anual External heat exchangers The PFG boiler can be used with a storage tank/heat exchanger unit for domestic hot water. The boiler/tank combination should be installed and wired in accordance with the tank manufacturer’s instructions, which will also show any additional components required. -
Page 10: Size And Install Gas Piping
PFG S — B erieS Fired ater oiler oiler anual Size and install gas piping If boiler is to be propane fired, a conversion kit must be used. Failure to use kit or to In sizing the gas piping, the following factors should properly install kit will result in severe be considered. - Page 11 PFG S — B erieS Fired ater oiler oiler anual Figure 5 Gas supply piping Figure 5a Leak test valve (model PFG-8 ONLY) Part Number 550-110-641/0605...
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Page 12: Draft Hood Installation
PFG S — B erieS Fired ater oiler oiler anual Draft hood installation Wiring Secure the draft hood to the outlet at the top of the boiler For your safety, turn off the electrical with sheet metal screws. The bottom of the draft hood power supply at the service entrance panel or “skirt”... -
Page 13: Wiring Multiple Zones
PFG S — B erieS Fired ater oiler oiler anual Wiring multiple zones Figure 6 Typical wiring – zoning with zone valves Refer to zone valve manufacturer’s literature for wiring and application. A separate transformer is required to power zone valves. Zoning with circulators requires a relay for each zone circulator. -
Page 14: Checkout Procedure
PFG S — B erieS Fired ater oiler oiler anual Check-out procedure b. For standing pilot systems: Turn gas knob to PILOT position and extinguish pilot flame - Pilot gas flow should stop in less than 3 minutes. Put system back into operation. See page 17. Check off steps as completed. -
Page 15: Section Ii: Service
PFG S — B erieS Fired ater oiler oiler anual Section II: Service Also Refer to Additional Instructions Shipped With The Boiler For Specific Control Operation and Troubleshooting. Verify Proper Operation After Servicing. Your boiler should be inspected, cleaned To avoid personal injury, death or property and, if necessary, adjusted once a year. -
Page 16: Daily During Heating Season
PFG S — B erieS Fired ater oiler oiler anual Suggested Minimum Service Schedule for Qualified Service Technician Only Beginning of each heating season: 1. Annual service call by a qualified service agency. . Check burners and flueways and clean if necessary. Reference “To clean boiler heating surfaces” and “To clean main burners,”... -
Page 17: To Place In Operation
PFG S — B erieS Fired ater oiler oiler anual To inspect base insulation: Check pilot burner flame: 1. Proper pilot flame The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials. See WARNING a) Blue flame. above. - Page 18 A boiler drain cock is pro- physical damage, sagging, etc. Correct all conditions found. vided by Weil-McLain on the left side of the boiler only. 3. Verify damper, if used, is open when burner ignites. For additional information, see Control Supplement.
- Page 19 PFG S — B erieS Fired ater oiler oiler anual Common problems and possible solutions Part Number 550-110-641/0605...
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Page 20: Section Iii: Replacement Parts
PFG S — B erieS Fired ater oiler oiler anual Section III: Replacement Parts The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials, per instructions on page 15 of this manual. Failure to comply could result in severe personal injury. To avoid personal injury, before replacing any parts on the boiler: 1. - Page 21 PFG S — B erieS Fired ater oiler oiler anual Part Number 550-110-641/0605...
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Page 22: Section Iv: Ratings, Dimensions
PFG S — B erieS Fired ater oiler oiler anual Section IV: Ratings and dimensions Standard equipment • • Factory Fire Tested Combination Pressure-Temperature Gauge (shipped in separate carton) • Insulated Extended Jacket • Drain Valve (shipped in separate carton) •... - Page 23 PFG S — B erieS Fired ater oiler oiler anual * Locate manual main Shut-Off Gas Valve (where required) according to local utility requirements. Part Number 550-110-641/0605...
- Page 24 PFG S — B erieS Fired ater oiler oiler anual Part Number 550-110-641/0605...