Function & Controls
Automatic Self Test
Approximate duration - 1.5 minutes.
Unit will perform a self test each time power is first applied. Unit will cycle blower through all speeds, holding each for 15 seconds. Remainder of test is for circuit board tests, after which normal operation will resume.
Basic Functions
•Thermostat fan switch will control low speed fan operation
•Call for heating - high speed
•Call for cooling - high speed
Selecting Different Heat & Cool Speeds
To select medium speed for heating or cooling, switch the appropriate DIP switch to the ON position.
Example: To select medium speed for heating, switch the HEAT DIP switch to ON. To select medi- um speed for cooling, switch the COOL DIP switch to ON. (To select medium for both heat and
cool, switch both heat and cool DIP switches to ON.)
Standard 24 Volt
Thermostat Connection
(Thermostats are not available through Nutech)
Note:
“Power stealing” thermostats are not compatible.
Mechanical thermostats are not recommended.
Cooling anticipators need to be disabled if used.
Call technical support (519
for more information.
Optional Digital Electronic Timer (DET) Part
Connect up to 4 maximum
Boosts unit to high speed for 20,40 or 60 minutes
Micro Processor Board
T25 | 12Vac |
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T26 | Com |
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| amp | F1 |
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T27 | C |
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| Spade | Sensor | Pressure | T21 T22 |
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| Line | T3 T4 | |
C R W Y G |
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| Connections | istat | Dehumid- | T23 T24 off on |
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| T5 T6 T7 T8 | ||||
Thermostat |
| DFR2 | cool | heat | DD | FD | POOL | SW1 |
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| T9 |
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| T10 |
YEL |
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| T11 |
GRN | DET |
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| Neutral | T12 T13 |
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| T14 |
RED |
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| T15 |
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| T16 |
Freeze | P2 |
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Defrost | P3 |
| MAX 1 amp |
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| LD1 |
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T28 | R |
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| K6 | COM |
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T29 |
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24Vac |
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T30 |
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T31 T32 | N.0. COM | Contact |
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| Fan Hi | T17 |
T33 | N.C. | 1 |
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T34 T35 T36 | N.0. COM N.C. | Contact 2 |
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| K4 | COM | N.O. |
| Fan Med | T18 |
T37 T38 T39 | N.0. COM N.C. | Defrost Damper |
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| K5 | COM | N.O. |
| Fan Low | T19 |
T40 T41 T42 | N.0 . COM N.C. | Vent Damper |
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| T20 | FEED | RELAY | |
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| 29 |
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Connect two wires from dehumidistat to terminals
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| umidis |
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Deh | Relative | |||||
Setting | s | |||||
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Outsid |
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| WINTER |
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Set | dehumid |
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between | 30% to | dry, | ||||
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| e is too |
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If hom |
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adjust | to higher | humid, | ||||
e is too | ||||||
If hom | setting. | |||||
adjust | to lower |
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| SUMMER | : |
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Set | dehumid | istat | ||||
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Optional Remote Dehumidistat Part #99-130W
(Boosts unit to high speed when humidity is higher than setpoint)
Location of |
Electrical |
Box in |
Furnace |