Heating Maintenance and Repair Electric Furnace Electric Baseboard Gas Furnace Hydronic Heating Disclaimer The use of photos of tools and/or components which clearly indicate their manufacturer or brand in no way implies an endorsement of the company, brand or product by the National Apartment Association Education Institute. Welcome! Course Topics Roles and Responsibilities Heating Safety Tools and Equipment Air Distribution Electric Furnaces Electric Baseboard Gas Furnaces Hydronic Heating Resources: Participant Guide Presentation Your Questions Your Experiences Videos Demonstrations Your Participation 1
Safety Heating Systems Safety Rules: 1. Turn Power Off 2. Wear Personal Protective Equipment (PPE) 3. Follow Lock-Out /Tag-Out Procedures Safety Heating Systems Safety Rules: 4. Keep Tools and Equipment in Good Working Order 5. Do Not Take Shortcuts or Bypass Safety Features in Heating Systems Safety Devices These are used to prevent catastrophic failure of equipment. DO NOT BYPASS 2
Key Tools for Heating Repairs Electric Air Distribution Gas Air Distribution 3
Components Pg. 13 Lubricate, Testing and Replacing Fan Relay Instant action switch When low voltage is applied, a magnet is used to change the condition of the contacts What was open is now closed, what was closed is now open. 4
Sequencer Can have multiple levels (stages) to send power to different loads, at different times Sequencer A delayed action switch When low voltage is applied it heats a small element Heat causes bimetallic switch to close Heating element Bimetallic switch Limit Switch 5
Forced-Air Systems Heat Increasing the temperature in a specific space 0K = 459.67 F 300K = 80.3 F Adding heat = molecules move faster Adding Heat Cant be created, just transformed 6
Moving Heat Conduction Convection - Radiation Heat IMPORTANT: Heat will only transfer from higher temperature to lower, never the reverse. Heat Types of Heating Systems: 1. Electric Heat (forced air) 2. Electric Baseboard 3. Gas Furnace (forced air) 4. Hydronic Heat 7
HVAC HVAC Servicing Procedures / Pg. 43 Thermostat Thermostat 8
Thermostat Think of a thermostat as a switch that is controlled by the temperature of the living space. The operator controls the open/close point of that switch. The temperature in the room controls the actual switch. Thermometer Coil Thermometer coil with mercury switch attached HVAC HVAC Servicing Procedures / Pg. 43 9
Transformer Transformer HVAC HVAC Servicing Procedures / Pg. 43 10
Electric Furnace Heating Pg. 20-21 Electric Furnace Key Parts of an Electric Furnace: Blower Heating Coils Interlock Electric Baseboard Heating 11
Electric Heat Element Limit Switch Fuse Link Electric Heat Schematic Anatomy of a Gas Furnace 12
Gas Furnace Key Parts of an Gas Furnace: Gas Control Valve Gas Manifold Gas Burners Heat Exchanger Ignition System Thermocouple/ Power Pile Blower Gas Furnace Gas Furnace 13
Gas Furnace Exhaust Exhaust Safety Gas Valve Roll Out Gas Burners Gas Manifold Gas Furnace Key Parts of an Gas Furnace: Fan Switches Limit Switch Flue Pipe Gas Furnace 14
Gas Furnace Interlock Video: Hydronic Heat Basics Watch Video 15
Q&A Q A Action Plan Page 65 Thank You For Attending 16
Certificate for Apartment Maintenance Technicians (CAMT) Skill Checks Heating Systems Maintenance and Repair Course Skill Check #4 You Are Here: Heating Maintenance and Repair 1. When is it acceptable to call a Heating Specialist? Heating System Safety: 2. What are some of the safety precautions to be taken when working on heating systems? Key Tools for Heating Repairs: 3. What tool can be used to test the heating element on an electric heater? 4. What tool is used to test presence of carbon monoxide? Air Distribution: 5. What is the function of the blower in a heating system? 6. What is the function of the Fan Limit Control Switch? 7. What problems can a clogged air filter cause? 8. What can cause blower motor to not start?
Certificate for Apartment Maintenance Technicians (CAMT) Skill Checks 9. What are the different methods of heat transfer? 10.Which types of heating systems are found in apartments? Electric Furnace Heating: 11.What is the function of the heating coil? 12.What is the function of the sequencer relay? 13.Which are the two safety devices that turn the heating element OFF in case of a malfunction in the heating system? 14.What can cause heat to not work? Gas Furnace Heating: 15.Which are the three elements required to create combustion? 16.Which toxic gases are created when combustion is not fully achieved? 17.What is the function of the gas valve? 18.What is the function of the ignition system?
Certificate for Apartment Maintenance Technicians (CAMT) Skill Checks 19.What is the name of the safety device that ignition systems with standing pilots use? 20.What is the function of the flue pipe? 21.What can keep a pilot from staying ON? 22.What happens when there is not enough oxygen in the heating exchanger? Hydronic Heating Systems: 23.How is heat created in a Hydronic System? 24.What is the function of an Aquastat? 25.What is a Circulator? 26.How can rusty water be removed from a hydronic system?