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HV103 Heat Controls

Across
Thermostats today
Main control for heating system
Replace this whenever you replace a motor
28 to 30 Millivolts
Fan control wired in series with
Makes draft in a chimney
How safeties are wired
Most safeties (abbrev-ate)
Located near burner section
Intergrated furnace control abbrev.
HSI
Last step in a heating sequence of operation
Get across a closed switch
APS unit of measurement
Found in blower section
Turns fan on at 150 and off at 100
Electric strip heaters rated by
_______ thermostats need to be level
A switch found near a draft hood on a natural draft boiler or furnace
Down
Only N/O saftey
Undershooting, ________ the heat anticipator
30, 60 or 90 sec. delay
Also know as a time delay relay
Protects a load
Protect heat exchanger
Direct ignition
Away of troubleshooting a wiring diagrahm
Operates a load
Must be installed on fanlimit control when have same voltage
Most common cause for no heat on a furnace
Get across a open switch
Used to heat anticipator
Safeties shut this off most of the time
Proves pilots and main burners
Thermocouple produces
Can be used check a switch. (not voltage)
Overshooting,______ the heat anticipator
Only on a call for heat
Used to check resistance