Country Hearth 24A, Owner'S Manual

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15
CONTROL BOX & ELECTRICAL COMPONENT
ELECTRICAL COMPONENTS
Wall Thermostat
*(2) 140 degree Adjustable Thermo Disk
*(1)170 degree Thermo Limit Disk
*(1)Relay Transformer
(2) Air Distribution Fan
(1)Draft, Fan
* Control Box Components
170 degree
limit disc
140 degree
adjustable disc.
(Left Dist. Blower)
140 degree
adjustable disc.
(Right Dist. Blower)
10 BASIC FUNCTIONS OF ELECTRICAL SYSTEM
• Relay...electrical switching device,
• Rheostat...current (voltage) reducer increases or decreases draft fan R.P.M.
• Distribution Capacitor: Reduces amps required to activate distribution fan.
• Transformer: Reduces voltage 110 volts to 24 volts for thermostat usage. Generally hums a bit.
• 170 degree limit disk...breaks off electrical current to the draft fan at 170 degrees
• (2) adjustable140 degree limit disc...closes at set temperature to operate distribution blowers. Thermodisc’s
range is 95-140. (see illustration for location)
• Draft fan...small fan that activates fi re, increasing fi re temperature.
• Wall mounted thermostat requests heat...electrical contact occurs.
1. Current is sent through relay, rheostat, 170 degrees thermo limit disk to activate draft fan.
2. Upon
fi rebox temperature rise due to air from draft fan, current passes thru the top/right thermodisc to activate
the left distribution fan. The factory seting is approximately 120 degrees air temperature, 500 CFM of air at
120 degrees.
3. Should fi rebox temperature air reach 140 degrees, current is directed thru the bottom/right thermodisc to activate
the second fan for 1,000 CFM of air.
4. Both blowers will continue to run until air temperature drops approx. 20 degrees below the set point on the
thermodisc.
The above is somewhat basic, however, it’s offered so you can understand your furnaces electrical functions and
enjoy it more.
Your new furnace is now completely assembled and ready to be installed. Make sure you followed the sec-
tions on installation in the front of this manual.