York B4IH-360, Technical Information

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1
5.1.- Applications of upward ducts (bottom)
(Fig. 5)
1. Return duct:
- Access the return section through the access door
(A1).
- Loosen the 4 screws (8) that fasten the bottom return
cover (C1) to the base of the unit.
- Slide the cover out and away from the unit, thus uncov-
ering the opening for duct connection.
- Discard the cover.
2. Impulse duct:
- Access the impulse section through access doors
(A5).
- Remove the inner cover (7) by loosening the screws
that fasten it to the unit.
- Loosen the 2 screws (8) that fasten the bottom impulse
cover (C2) to the base of the unit.
- Slide the cover out and away from the unit, thus uncov-
ering the opening for duct connection.
- Discard the cover.
-
Very important: The bottom cover (7) should be fitted
back into place without forgetting any of the screws.
Attention: In the case of D4IC/B4IH units with optional
hot water coil, or D4IG units with gas heating:
- The lower impulse section (C2) cannot be accessed
through access doors (A5).
The unit is delivered without cover (C2), ready for
connecting the impulse duct. For this purpose, please
indicate impulse duct location when placing the order.
. Access doors are equipped with ¼-turn locks, by means
of an 8 mm. hexagonal key.
Once installation is finished, these must adjust correctly
to their locks.
4.
Very important:
- Cover (C5) is related to the opening for the outdoor air
intake when the unit is equipped with the economiser
or manual damper optional accessory.
- Cover (C) is related to the opening for the extraction
air outlet when the unit is equipped with the barometric
damper or axial extraction fan options.
- If the unit is not equipped with any of these accessories,
it is supplied with the cover fitted into place and none of
the screws that fasten it to the panel should be removed
or loosened under any circumstance.
- Fig. 5 -
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C2
IMPULSE
C1
RETURN