Transcript Heating - Multifamily NW

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
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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
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
Key Tools for Heating Repairs
Electric Air Distribution
Gas Air Distribution
Components
Pg. 13
Lubricate, Testing and Replacing
Fan Relay
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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.
Sequencer
•
Can have multiple levels (stages) to send
power to different loads, at different times
Sequencer
•
•
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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
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
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
HVAC
HVAC Servicing Procedures / Pg. 43
Thermostat
Thermostat
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
Transformer
Transformer
HVAC
HVAC Servicing Procedures / Pg. 43
Electric Furnace Heating
Pg. 20-21
Electric Furnace
Key Parts of an Electric Furnace:
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Blower
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Heating Coils
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Interlock
Electric Baseboard Heating
Electric Heat Element
Limit Switch
Fuse Link
Electric Heat Schematic
Anatomy of a Gas Furnace
Gas Furnace
Key Parts of an Gas Furnace:
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Gas Control Valve
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Gas Manifold
•
Gas Burners
•
Heat Exchanger
•
Ignition System
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Thermocouple/
Power Pile
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Blower
Gas Furnace
Gas Furnace
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
Gas Furnace
Interlock
Video: Hydronic Heat Basics
Watch Video
Q&A
Q
A
Action Plan
Page 65
Thank You For Attending