NATIONAL |
SmartVapTM |
REFRIGERATION |
Electronically |
PROGRAM SPECIFICATIONS |
Controlled System |
AND OPERATING |
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INSTRUCTIONS |
Model: (Part # 1090200) |
1079817 |
Electrical Power: 115/1/60, 208-230/1/60 |
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Electronic Room Thermostat & Defrost Control
Factory Settings:
This Defrost/Temperature control has been COMPLETELY pre-set at the factory for Electric Defrost mode. Room temperature default factory setting is –10ºF. Simply re-adjust if different room temperature setting is required. If desired, clock can be set to display the current time (24 hour mode). It is recommended to retain all other factory settings initially, and re-adjust accordingly later, if required.
Also refer to control wiring diagrams on following pages.
Note: After power - up, allow 15 seconds for display to activate
Electric Defrost Mode Program
Default DISPLAY shows actual room (zone) temperature:
Display shows: |
Range: |
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“-10ºF” |
-45ºF to 99ºF |
Note: To gain access to control buttons, pry up cover (use slot at bottom of cover)
“Time” Button Functions
To view TIME settings (in sequence listed below), push and release the “Time” button
To adjust settings, hold down the “Time” button while pushing “Up” or “Down” buttons.
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Display |
Adjustment |
Factory |
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Function |
Shows: |
Range: |
Default |
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Setting: |
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24 hour time |
“24:00” |
00:00 to |
NA |
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of day |
24:00 |
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Number of |
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defrosts per |
“nd / 04” |
nd01 to 12 |
nd / 04 |
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day (24 hrs) |
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First defrost |
“def 01 / |
00:00 to |
09:00 |
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start time |
09:00” |
24:00 |
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Maximum |
“defd / 35” |
1 min. to |
35 min. |
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defrost duration |
2 hours |
“Temp” Button Functions
To view TEMP settings (in sequence listed below), push and release the “Temp” button. To adjust settings, hold down the “Temp” button while pushing “Up” or “Down” buttons.
Function |
Display |
Adjustment |
Factory Default |
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Shows: |
Range: |
Setting: |
Temp (zone) set point cut -in |
“SPº / -10ºF” |
-40 to 99ºF |
-10ºF |
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Temp (zone) set point differential* |
“difº / 04ºF” |
2 to 25ºF |
4ºF* |
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Temp (evap) actual temperature |
“Evap” / actual ºF |
NA |
NA |
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Fan delay temp (fans cut-in) set point |
“Fdº / 25ºF” |
15 to 30ºF |
25ºF |
Defrost termination temp cut -in set point |
“dtº / 55ºF” |
40 to 70ºF |
55ºF |
* CAUTION: “Cut-Out” = “Cut-In” - “Diff”
Increasing this factory difº value will result in longer compressor running times and colder room temperature. Decreasing this factory difº value will result in short compressor running on/off cycles.
“Man. Def” (Manual Defrost) Button Function
This will immediately START a manual defrost cycle if in refrigeration mode. If already in a defrost cycle, this will stop the defrost cycle if pushed a second time. This will not affect or override any normal defrost programming.
TESTING NOTE: The defrost cycle will not start if the EVAP sensor temperature is at a temperature higher than that of the Defrost Termination Set point (55ºF). The evaporator must be at a colder temperature.
Push and hold button for at least 5 seconds to activate. Do not push this button on and off without waiting at least 5 seconds between periods.
Loss of Power
In event of loss of power, all programmed settings will remain as those at time of power loss. Clock time will remain at time of power loss (similar to
a conventional defrost clock). When power is restored, wait at least 15 seconds for display to indicate the Zone temperature (default display)
Restore Original Factory Default Settings
To restore unit to original factory default settings:
-Push “Up” and “Down” buttons simultaneously and hold for at least 5 seconds until display “Ed” steadily appears (1 second).
-Release Buttons.
The clock is now programmed for factory settings on Electric Defrost mode.
For Air Defrost (Ad):
-Push “Up” and “Down” buttons simultaneously and hold for at least 10 seconds until display “Ad” appears (after “Ed” disappears).
-Release Buttons.
The clock is now programmed for factory settings on Air Defrost mode.
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