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Phason 

 

MTC-3C installation guide 

10340009  

Automatic mode 

1.

 

Turn the 

Temp Set

 knob completely clockwise. 

2.

 

Turn the 

Idle Set

 knob to the minimum speed 

desired. 

3.

 

Turn the 

Temp Set

 knob to the desired temperature. 

Manual mode 

1.

 

Turn the 

Temp Set

 knob completely clockwise. 

2.

 

Turn the 

Idle Set

 knob to the desired idle speed. 

 

Maintaining the MTC-3C 

Proper care and maintenance will help your MTC-3C last longer. To prevent damage to the control, perform the following 
steps after the first two weeks of operation, and once a year after that. 

1.

 

Switch off the power to the control. 

2.

 

Remove the cover and check inside for moisture. If there is any moisture, wipe it away using a dry cloth.  

3.

 

Check all cable entry points to make sure they are properly sealed. If they are not properly sealed, apply silicone sealant 
around the entry points. 

 

If you need to seal the enclosure, use a sealant that is labelled as ‘non-corrosive’, ‘electronics grade’, or 
‘neutral cure’, such as GE Silicone RTV6780B, RTV 142, or RTV 162. 

Do not

 use a sealant that is labelled as ‘acetic acid cure’ or ‘acetoxy cure’. These sealants release acetic acid 

while curing, which can damage the control and will void the warranty. 

 

4.

 

Check all wires to make sure they are properly connected and that they are in good condition. 

5.

 

Fasten the cover to the enclosure and then switch on the power to the control. 

 

Cleaning the MTC-3C 

To clean the MTC-3C, wipe the surface with a damp cloth. 

 

Be careful when washing the room using a high-pressure washer. DO NOT spray the control using a high-
pressure washer, this can damage the control and will void the warranty. 

Evidence of moisture damage inside the control will void the warranty. 

 

 

Troubleshooting 

If this guide fails to resolve your problem, contact your dealer. 

The fan motor will not run 

‹

 

Reset the thermal cutout on the fan motor and allow the motor to cool. 

‹

 

Check the wiring. 

‹

 

Use a test light or voltmeter to test the power at the control. 

‹

 

Replace the fuse. If the fuse blows immediately, a problem exists with the wiring or the fan motor. If the fuse blows after a 
delay (minutes, days, or weeks), the load is exceeding the current rating of the control. 

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