NorAire NC-FE series, Installation & Operating Instructions Manual

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05/16/2014 10 NI216
Radiant (Only) Heat Circuit Procedure
1. Condition the heat aquastat to on for 5 to 10 seconds (jumper R to W). The front panel STATUS light
should be full on indicating the control board is set up for heating mode.
2. Connect a city water or well water source as shown.
3. If your system does not have a loop manifold with easily connected hose ports on each end (as shown),
you will need to make a valving arrangement with two ports (hose bib) as shown on the next
Cooling/Chilled Water Direct drawing.
4. Notice the two valves marked A and B . Again if your loop manifold does not have shutoff valves going
to the leader pipe you should be installing these on your system.
5. Only open one loop (small valve above each tube), the others should be closed.
6. Begin with both A and B valves open. Begin introducing city water with hand valve S , being aware of
Basics paragraph 1 above.
a. Flow is through the return manifold/NorAire IN/through boiler vessel/heating water
OUT/through air separator/supply manifold top/drain.
b. This first pass will involve all of the above piping, thus the times mentioned in paragraph 5
above will not apply.
7. You should begin seeing air bubbles coming out of the drain hose. Reference paragraph 5 above, run
the refill city water until you are absolutely sure all air is purged.
8. Move to the next floor loop by simultaneously opening the next and closing off the previous. Continue
steps 5-7. Repeat until all radiant loops are air purge and water filled.
9. Simultaneously close valves A and B . Keep this zone circuit in this condition until all others are air
purged and filled.
10. At the end keep city water and drain connected. At the IDU cabinet, left side, remove the side panel.
This will allow easier viewing of the pressure/temperature gauge (also will need to be inside later for
defrost bypass purging). Observe gauge, set at 15 psig. Turn off the city water source and close drain.
But continue to keep the hoses connected.
WARNING – AVERTISSEMENT
RISK OF ELECTRIC SHOCK – CAN CAUSE INJURY OR DEATH
RISQUE DE CHOCS ÉLECTRIQUES – PEUT CAUSER DES BLESSURES ET MÊME
ENTRAÎNER LA MORT