Applied Comfort NFWC Series Installation & Operation Manual Download Page 1 | Manualshive

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803809 Rev. 01

NFWC SERIES UPFLOW PACKAGED TERMINAL AIR CONDITIONER (PTAC)

Cooling with Hot Water or Steam Heating

INSTALLATION & OPERATION MANUAL

IMPORTANT:

READ AND SAVE THESE INSTRUCTIONS. INSTALLATION AND WIRING MUST
BE IN ACCORDANCE WITH CEC, NEC AND LOCAL ELECTRICAL CODES.

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Summary of Contents for NFWC Series

Page 1: ...PACKAGED TERMINAL AIR CONDITIONER PTAC Cooling with Hot Water or Steam Heating INSTALLATION OPERATION MANUAL IMPORTANT READ AND SAVE THESE INSTRUCTIONS INSTALLATION AND WIRING MUST BE IN ACCORDANCE WITH CEC NEC AND LOCAL ELECTRICAL CODES ...

Page 2: ...or cooling during the building s construction stage To access the air filter first remove the grille cover from the heating subbase by rotating the two turn finger and thumb fasteners until the grille cover releases The unit front panel need not be removed The air filter is located directly below the heat exchange coil and slides out freely Always replace the grille cover after re inserting the fi...

Page 3: ...sleeve has a 1 8 per foot slope downward toward the outside to ensure proper water drainage out the back edge of the sleeve during overflow conditions The specified slope corresponds to a 1 8 bubble on a carpenter s level The wall sleeve must also be level from side to side HEATING SUB BASE The heating subbase contains a tube and fin heat exchanger that is configured for the use with hot water or ...

Page 4: ... tubes Always pipe the valve to the supply connection If the heating medium is hot water connect the valve outlet Supply to the lower connection and the Return water to the upper connection If the heating medium is steam connect the valve outlet Supply to the upper connection and the Return to the lower connection Route the steam or water source to the valve s inlet connection Install the piping v...

Page 5: ...t or debris that may have accumulated Replace any air seals that are damaged or missing if applicable Heating Cooling Chassis Installation 1 Locate the wall sleeve seal shipped with the unit and apply it to the top front flange of the wall sleeve running even with the bottom edge of the flange see illustration 2 Slide the chassis into the wall sleeve until firmly seated against the seals Push from...

Page 6: ...r in the bottom of the heating subbase so it is sure to sense true return air temperature and not air that has been heated by the heating coil Use the clamp provided to secure the bulb in place IMPORTANT To avoid damaging the indoor thermistor wire always remove the thermistor from the clamp holder before removing the chassis for service IMPORTANT Operating the unit without the filter in place can...

Page 7: ...to operate the fan and set fan speeds Auto Mode will cycle the fan on and off and determine the fan speed in conjunction with the heating or cooling demand Warmer Key Pressing the Warmer Key will cause the display to show the set point temperature for 3 seconds and then increases room temperature by 1 degree for every subsequent press of the key Cooler Key Pressing the Cooler Key will cause the di...

Page 8: ...ge personal injury or death Disconnect electric power to the unit before servicing A factory supplied 24 Volt wiring harness is provided with every unit to facilitate connection to the wall thermostat wiring One end has a multi pin connector which mates with a connector exiting the unit The other end has preinstalled butt splice connectors which play a dual role in insulating any unused connectors...

Page 9: ... to be ON or OFF and whether the fan is to run continuously or to cycle with heating or cooling demand Figure 2 Once a comfortable temperature setting is established no other adjustments are necessary except for fan speed which may or may not be adjustable on your particular thermostat CAUTION One side of the unit s 24 volt control system is grounded When wiring the thermostat care must be taken n...

Page 10: ... 22 The procedure to set the limits is as follows Depress the On Off key the F C key and the Warmer key simultaneously for 5 seconds to enter the limit setup mode The Warmer and Cooler keys will scroll through the R values indicated in the above table Once the desired R value has been obtained on the display press the On Off key to accept the change and then press it again to effect the change and...

Page 11: ...from the Chassis Air Outlet by removing the screw located under the control door The Duct Plenum can now be installed Insert the Duct Plenum tabs into the slots provided in the Chassis Enclosure based on the direction you require the air discharge On the opposite end of the tabs there will be an existing screw location Use the screw removed previously to secure the Duct Plenum to the Chassis Air O...

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