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Mobile View HEATING SYSTEMS AIRBOUND HEAT SYSTEM REPAIRS ANODES & DIP TUBES on WATER HEATERS ANTI SCALD VALVES BOILERS, HEATING BOILER OPERATION DETAILS BOILER CONTROLS & SWITCHES Air Bleeder Valves Aquastat Functions BOILER LEAKS CORROSION STAINS BOILER OPERATING PROBLEMS BOILER PARTS LIST Boiler Pressure Controls & Settings Cad Cell Relay Switch Flame Sensors Circulator Pumps & Relays Expansion Tanks Gauges on Heating Equipment Limit Switches, Boilers Low Water Cutoff Valves, Boilers Mixing Valves Pressure Gauges, Boilers Relief Valves - TP Valves Reset Switch - Primary Control Reset Switch - electric motors Spill Switches Stack Relay Switch Thermostats Water Feeder Valves, Hydronic Boiler Zone Valves WATER HEATERS ZONE VALVES CARBON MONOXIDE/DIOXIDE CARBON MONOXIDE WARNING CHIMNEY INSPECTION DIAGNOSIS REPAIR CHIMNEYS & Flues - Asbestos Transite Pipe COMBUSTION GASES & PARTICLE HAZARDS COMBUSTION PRODUCTS & IAQ DEFINITION of Heating & Cooling Terms DRAFT HOODS - gas fired DRAFT REGULATORS - barometric dampers DUCT SYSTEMS DUCT INSULATION, Asbestos Paper DUCTS, Asbestos Transite Pipe DUST FROM HVAC? ELECTRIC HEAT ELECTRICAL POWER SWITCH FOR HEAT ENERGY SAVINGS in BUILDINGS ENERGY SAVINGS PRIORITIES ENERGY SAVINGS RETROFIT CASE STUDY ENERGY SAVINGS RETROFIT LEAK SEALING GUIDE ENERGY SAVINGS RETROFIT OPTIONS FLUE VENT CONNECTORS FREEZE-PROOF A BUILDING FURNACES, HEATING DUCT SYSTEM DEFECTS FAN LIMIT SWITCH FURNACE CONTROLS & SWITCHES FURNACE OPERATION DETAILS HEAT EXCHANGER LEAKS STACK RELAY SWITCHES GAS PIPING, VALVES, CONTROLS GAUGES ON HEATING EQUIPMENT HEAT LOSS in BUILDINGS HEAT LOSS DETECTION TOOLS HEAT LOSS INDICATORS HEAT LOSS R U & K VALUE CALCULATION HOUSEWRAP AIR & VAPOR BARRIERS HEATING COST SAVINGS METHODS HEATING LOSS DIAGNOSIS-BOILERS HEATING LOSS DIAGNOSIS-FURNACES HEATING OIL CLOUD WAX GEL POINT HEATING OIL EXPOSURE HAZARDS, LIMITS HEATING OIL SLUDGE HEATING SMALL LOADS HEAT PUMPS HEATING SYSTEM INSPECTION PROCEDURE HEATING INSPECTION CONCEPTS HEATING INSPECTION PROCEDURE HOT WATER HEATERS HOT WATER IMPROVEMENT INSULATION & VENTILATION INSPECTION & IMPROVEMENT MIXING VALVES NO HEAT - BOILER / FURNACE DIAGNOSIS OIL BURNERS OIL BURNER INSPECTION GUIDE OIL BURNER NOISE SMOKE ODORS OIL BURNER SOOT & PUFFBACKS OIL FUEL TYPES & CHARACTERISTICS Oil Odors: Leaky Oil Tank Piping OIL SAFETY VALVES OIL TANKS OIL TANK GAUGES OIL TANK LEAKS OIL TANK SLUDGE OIL TANK TESTING OIL TANKS, BURIED PLASTIC HEATER VENT RADIANT HEAT RADIANT HEAT Floor Mistakes to Avoid RADIANT SLAB FLOORING CHOICES RADIANT SLAB TUBING & FLUID CHOICES RADIATORS RELIEF VALVES - TP Valves on Boilers Relief Valves - Water Heaters SAFETY DURING HEATING INSPECTION Safety Recalls BLUERAY Recall CHIMNEYS & Flues - Asbestos Transite Goodman HTPV RECALL Heat Recovery Ventilator RECALL Lennox Furnace Manuals Lennox WARNING Weil McLain RECALL SAFETY DURING HEATING INSPECTION SOOT on OIL FIRED HEATING EQUIPMENT SPILL SWITCHES - Flue Gas Detection STAIN DIAGNOSIS on Indoor Surfaces STEAM HEATING SYSTEMS Cad Cell Relay Switch Flame Sensors COMBUSTION GASES & PARTICLE HAZARDS COMBUSTION PRODUCTS & IAQ DEFINITION of Heating & Cooling Terms DRAFT HOODS - gas fired DRAFT REGULATORS - barometric dampers Cad Cell Relay Switch Flame Sensors Circulator Pumps & Relays Draft Regulators, Dampers Expansion Tanks Gauges on Heating Equipment Limit Switches, Boilers Low Water Cutoff Valves, Boilers Mixing Valves Relief Valves - TP Valves Sight Glass, Steam Boiler Pressure Switch, Steam Boiler Spill Switches Stack Relay Switch Steam Pressure Gauge Steam Vents LOW WATER CUTOFF CONTROLS Water Feeder Valves, Steam TANKLESS COILS Tankless Coil Leaks THERMAL EXPANSION of MATERIALS THERMAL MASS in BUILDINGS THERMAL MASS in UPSTAIRS THERMAL TRACKING & HEAT LOSS THERMOSTATS Transite Pipe Chimneys & Flues WATER HEATERS ZONE VALVES More Information InspectAPedia Blog - News Updates Air Conditioning & Heat Pumps Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Bias Pledge Contact Us |
Here we provide an inspection and repair guide to Heating System Gauges: Pressure and Temperature Gauges on Heating Boilers. You will also see that this website answers most questions about Heating System Boiler Controls on central heating systems to aid in troubleshooting, inspection, diagnosis, and repairs. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution. © Copyright 2009 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. Hydronic (hot water) Heater Pressure Gauge and Normal Pressure Ranges
Typical pressure for a residential boiler serving a two story home would show 12 psi cold, and less than 30 psi hot. Over 30 psi boiler pressure will cause the pressure relief valve to open. Typical operating temperature settings on a boiler call for a Low temperature (boiler cut-in) between 120 and 160 degF. Typical operating temperatures on a hydronic boiler call for a high temperature (boiler cuts off) of 180-200 degF. Over 200 degrees F. we're at risk of spilling at the pressure temperature relief valve.
The temperature/pressure gauge may help in checking for normal conditions before and during boiler operation. However the gauge can be wrong! This gauge shows a typical in-boiler pressure of under 20 psi, and a temperature of about 190 degF. (The boiler had just cut off on a heating cycle.)
Steam Boiler Pressure Gauge and Normal Pressure Ranges
You should see similar settings on the pressure gauge (at left in our photograph) and on the steam pressure control switch (the gray box at right in our photo) on your boiler. The controls in this photo are discussed in detail at STEAM HEATING SYSTEMS
Hot Water Heating System Controls Inspection, Peripherals, Key ComponentsHow to determine what type of heating system is installed:Warm Air Heating Systems - Furnaces: If the heat in your building is provided by warm air that flows out of ceiling, wall, or floor air supply registers into the occupied space, or if your heating system uses a water-to-air heating system then the air which warms the living space is probably being delivered through large or small diameter ducts, registers, air filters, and a furnace blower, and the air is being heated by a gas, oil, or electric furnace, or perhaps by a heat pump or a geo-thermal system. See FURNACES and for details see FURNACE OPERATION DETAILS. Hot Water or Steam Heating Systems - Boilers: If the heat in your building is provided by warm or hot metal radiators, heating baseboards containing finned copper tubing, or wall convectors that look like a radiator but contain finned copper tubing, or if heat is provided by flexible rubber, plastic, or metal tubing run in building floors or ceilings, then the warm or hot water circulating in those devices is probably being delivered by piping circulating water heated by a heating boiler, or possibly by a steam boiler or a heat pump or geo-thermal system. See BOILERS, HEATING and RADIANT HEAT Floor Mistakes to Avoid. If your heating radiators have valves which hiss and let air escape as heat is coming on your heat is probably being delivered in pipes which circulate steam from the steam boiler up through radiators in the occupied space. See STEAM HEATING SYSTEMS . This website provides description of all of the major components of hot water or steam heating systems, how to recognize or find each component, what it looks like, what goes wrong, and how to maintain, repair or adjust the component. ... Technical Reviewers & References
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05/25/2009 - 09/05/2006 - InspectAPedia.com/heat/HeatingGauges.htm - © 2009 - 1988 Copyright Daniel Friedman All Rights Reserved - InspectAPedia® is a Registered U.S. Trademark