what does UNOCC mean? do?

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Old 04-07-12, 03:12 PM
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what does UNOCC mean? do?

Greetings

We purchased a house with infloor heating in one room and baseboard elsewhere, 5 thermostats in various places. We have no previous experience with this type of heating.

The controller is a tekmar 363.

There is a switch that sets between OCC (occupied) and UNOCC and have received various explanations of what it does. Still confused.

1) What does OCC and UNOCC set?

2) Do the thermostats do anything if the switch is set to UNOCC? OCC?

Apologize if this is a dumb question but we are newbies at this and struggling.

Thank you
 
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Old 04-07-12, 05:23 PM
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Old 04-07-12, 06:53 PM
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use then of UNOCC

Thank you. Interesting.

So then if we are in for a week, out for 2 weeks, in for a week, etc
should we hit the UNOCC switch when leaving or
just turn the thermostats down?

thank you
 
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Old 04-10-12, 04:22 PM
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Typically "UnOcc" will shift the reset curve down a number of degrees.
This will keep the house cooler by having lower water temps going to the in floor heating or rads.
Using a stat will also keep the room temps lower, but when there is a call for heat the boiler will output enough heat to heat the space to the "Occ" design temp.

With in floor I doubt it would make much difference in fuel consumption IF you had a condensing boiler. If you had rads you might find that during design conditions the condensing boiler might be out of condensing range during "Occ" operation whereas it might be condensing in "UnOcc" operation.

All in all, if you do not need to heat the water as much it will cost less, plain and simple. Even CI boilers will benefit from lower water targets if they are piped properly.
 
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Old 04-10-12, 08:33 PM
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thank you
info is very helpful
 
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