8.
Lag the vertical classroom unit to a couple of the wall studs, or
other structural wall components, through the Unit Mounting
Strip located inside the across the back and near the top. (Use
lags and shields if necessary).
Installation Note: When the classroom air handler is fitted with a
Rear Standoff (RSO) or Rear Plenum Assembly (RPA) it is
necessary to fasten the unit to the wall by using a field supplied
2” x 2” x 34” 18ga. Angle Brace, that must be secured to the top
cover of the RSO assembly.
9.
Once the air handler is in place, the wall sleeve should have a
positive seal along all points of contact against the unit and
must not interfere with the operation of any dampers. This can
be checked from the outside if the exterior louver has not been
installed or has been provided with a hinged access.
Important: It is imperative that the air separation dividers in the
wall sleeve be installed correctly to maintain a separation
between the stale, exhausted relief, or condenser air from the
incoming fresh air. These partitions extend from the rear of the
unit to the backside of the exterior louver as indicated in the
installation drawings provided.
10. To assure a watertight seal, caulk or tape the wall sleeve to the
exterior perimeter of the wall opening. Follow standard weather
proofing procedures when installing and caulking the exterior
louver and wall sleeve to prevent the infiltration of water into the
wall cavity.
11. Install the kick plate cover along the front at the base of the unit
and fasten into place along the sides with a couple of screws.
12. Apply a small bead of silicone around the outside of the unit
where the unit meets the wall. This will assure a good airtight
seal and provide a finished appearance.
13. Reinstall the front service panels with the door key provided.
Refer to custom shop and installation drawings and instructions
in the Information Package that was sent with the Unit for exact
measurements, descriptions and installation details.
Electrical Connections
ATTENTION: ELECTRICIAN
It is recommended that each unit be installed on a permanent,
separate electrical circuit. The circuit must be protected by a fuse or
HACR type circuit breaker.
To minimize risk, the unit is equipped with a door switch to disable
the 24 VAC control voltage, de-energizing the internal contacts when
the main access panels are removed. All units without electric heat
contain an internal manual disconnect switch that interrupts supply
line voltage. It is located inside the unit near the main electrical
control box.
Always turn off the electrical supply to the unit before repair or
major service. Failure to do so may result in personal injury.
In Canada, the unit must be installed and electrically grounded in
accordance with local codes, or the Canadian Electric Code CSA
C22.1. In the U.S. installation must be in accordance with the most
current issue of the National Electric Code ANSI/NFPA 70.
GENERAL ASSEMBLY AND INSTALLATION INSTRUCTIONS
It is important to read and understand the instructions outlined
in this document, as well as any job specific documentation
provided in the Information Package before proceeding with the
installation.
Care should be taken to protect the painted finish when handling the
unit and accessories.
General Installation Instructions of the Classroom Air Handler
Refer to custom shop and installation drawings and instructions
in the Information Package that was sent with the Unit for exact
measurements, descriptions and installation details
1.
Once the Rear Standoff (RSO) or Rear Plenum Assembly (RPA)
installation has been completed (if applicable) and the Wall
Sleeve has been installed, proceed with fastening the
Classroom Unit in place. (Refer to Pg 12)
Notice: You may require an assistant's help for this procedure.
2.
To assure a tight seal between the unit (or standoff) and the
wall, apply foam tape to the 1” wide mounting edge and to any
partitions of the rear standoff (or unit).
Tip: Keep the tape back from the outside edges by at least ¼” so
the tape does not become unsightly when compressed.
3.
If the unit has a cooling coil and drain pan, pass the drain hoses
that come out the back of the unit through the wall sleeve.
These hoses must gravitate drain downward to the outside as
they pass through to the exterior louver. They must allow
condensate to drain freely to the outside without restriction and
without inhibiting the operation of the dampers. (It will be
necessary to cut away enough of the bird screen in the back of
the exterior louver to allow the condensate hoses to pass
between the blades of the louver to the exterior.)
Notice: The condensate hose is supplied with a loop (trap). DO
NOT REMOVE THIS LOOP. If the loop is removed the drain pan
may overflow causing water damage inside and outside the unit.
4.
Check to be sure that the back of the Classroom Air Handler is
centered directly in front of the wall sleeve opening, and then
carefully slide the unit back into place (the unit must be level).
5.
If the wall is not perfectly perpendicular to the floor, it may be
necessary to slide shims under the front or back of the unit.
6.
Open the bottom and top front service panels with the door key
provided.
7.
Lag the unit securely to the floor in at least two places. This
should be done through the bottom pan of the unit from the
inside.
Installation Note: Some units have a drain pan in the bottom (i.e.
ERV units); avoid fastening the unit through the drain pan.
8
Owner’s Manual
Warning: Classroom Air Handlers weigh anywhere
from 420lbs to 1070lbs and may be heavy. Care must be
taken in the handling and moving of this unit to prevent
it from becoming unstable and tipping over once the
shipping crate is removed. Never lean a ladder against
the unit or put weight on or against the unit prior to
completing the installation as it may tip.
