10.4.9 Potentiometer Control Device
Potentiometer (10K Ohm"Linear Taper") device offers manual control over heater(s) firing rate. This type of potentiometer can be found at Radio Shack® .
Potentiometer dial position directly dictates heater(s) firing rate. Dial positions range between "Min" and "Max". Minimum and maximum heater firing rates (inputs) are marked on the heater's rating plate. ON/ OFF switch or thermostat is used to disable heater operation or reset heater from lockout.
FIGURE 28: Potentiometer Control Wiring Diagram
ON/OFF SWITCH | CENTRAL HEATER CONTROL | ||||
or THERMOSTAT | |||||
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| THERMOSTAT |
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| T24 |
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| R |
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| T25 |
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| W |
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| T26 |
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| T27 | ANALOG INPUT + - |
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| T13 | TH |
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| ERMISTO |
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| T14 |
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| R |
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POTENTIOMETER |
| GND |
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| |
(10K Ohm) | T15 |
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| SLIDE BAR |
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| T16 |
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| GND |
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| T17 |
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| HIGH |
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| T18 | WIPER | EXT. POT |
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| T19 |
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| GND |
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| T28 |
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| + |
| J10 JUMPER POSITION | |
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| RATE IN - | FIRING | ||
| T29 | SHOWS "CENTRAL" | |||
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| DESIGNATION AND | |||
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| "POTENTIOMETER" | |
| T30 |
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| CONTROL METHOD. | |
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| + |
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| T31 | RATE OUT | A B |
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| IFRING |
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| - |
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| J10 |
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| MODULATION CONTROL WIRING |
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| TO SATELLITE HEATERS |
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SATELLITE HEATER CONTROL | ||
*OPTIONAL |
| |
SWITCH |
| |
THERMOSTAT |
| |
T24 |
| |
| R | |
T25 |
| |
| W | |
T26 |
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T27 | ANALOG INPUT + - | |
| ||
T13 | TH | |
ERMISTO | ||
T14 | ||
R | ||
| GND | |
T15 |
| |
| SLIDE BAR | |
T16 |
| |
| GND | |
T17 |
| |
| HIGH | |
T18 | EXT. POT WIPER | |
T19 | ||
| GND | |
T28 |
| |
| + | |
T29 | FIRING RATE IN | |
| ||
| - | |
T30 | J10 JUMPER POSITION | |
| SHOWS "SATELLITE" DESIGNATION. | |
| + | |
T31 | A B | |
| IFRING ERAT OUT | |
| - | |
| J10 | |
| MODULATION CONTROL WIRING | |
| TO ADDITIONAL SATELLITE | |
| HEATER CONTROL TERMINALS | |
| T28 AND T29. | |
* Separate on/off switch is optional for "satellite" heaters (install at user level).
On/Off switch is used to disable heater operation or reset a heater that is in "lockout" mode. If on/off switch is not desired, leave jumper wire between R and W terminals in place.
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