Hotel PTACs

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chadz60

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I am working on a hotel with ~100 rooms each with their own PTAC (3.1kW electrical back-up). They are controlled with a thermostat and occupancy sensor, and normally run in heat pump mode (7.3 running amps). Is there any demand factor I can use to lower my service size? Can I size the OCP and conductors per the 3.1kW and and use the 7.3A load for my service size calcs? The AHJ is not allowing me to call them dwelling units (I tried).

Thanks for any/all help
 
Even if there is a demand factor I wouldn't use one if possible. motels usually have one exposure and they will peak at one time. The occupancy sensor is interesting because during peak conditions they should run whether someone is in the room or not.
 
Npstewart said:
Even if there is a demand factor I wouldn't use one if possible. motels usually have one exposure and they will peak at one time. The occupancy sensor is interesting because during peak conditions they should run whether someone is in the room or not.
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Having priced some retrofits in existing hotels I can tell you the occupancy sensor puts it in reduced temp mode for energy savings while keeping the room from getting too cold. The systems I priced also report back to the front desk and let the front desk know when someone is in the room.
 
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