I/O MANUAL Horizontal/Modular/Vertical/Rooftop AHU 2015pg
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COMMERCIAL AIRE PRODUCTS 501 Terminal Road, Fort Worth TX 76106
Tel: 817-624-0820
All units require field supply electrical over-current and short circuit protection. Device must be sized
larger than Maximum over-current Protection (MOP).
Codes may require a disconnect switch be within sight of the unit. It is recommended that over-current
protection and disconnect switch not be installed in the unit.
Locations for field cut electrical entries are marked on the unit. Field openings must be at least 6” away
from any component to prevent damage during the cutting procedure.
To pass wires through the wall or roof of the unit, a hole should be cut and a conduit should be passed
through it using the following procedure.
CUTTING ELECTRICAL OPENINGS
1-
Locate the placement of the hole. Be sure that the hole will not interfere with any component
operation or prevent access to any part of the unit.
2-
Drill a pilot hole all the way through the panel, insulation and interior panel.
3-
Using a hole saw cut the hole through the outside metal, insulation and inside metal
4-
Install the conduit through the panel and caulk the entire perimeter of the conduit in both sides
with and industrial grade caulking or duct seal compound.
Size supply conductors according to the Minimum Circuit Ampacity (MCA) rating. Supply conductors
must be rated a minimum of 75ºC. Protect each branch circuit according with the codes and
requirements. All the units must be electrically grounded in accordance with local codes or, in absence
of local codes, as per the current National Electric Code.
Supply voltage must be within the minimum/maximum range shown on the unit nameplate, available
short circuit current should not exceed the short circuit current rating (SCCR) shown in the unit
nameplate.
