installation
Installation procedure
Installing the Unit
Follow the procedures below to install the unit properly. Reference the “Dimensions and Weights” section for specific unit dimensions and mounting hole locations.
Vertical Units
CAUTION
Electrical Wiring!
Do not allow electrical wire to fall between the unit and installation surface. Failure to comply may result in electrical shorts or difficulty accessing wires.
Install vertical units in an upright position using the
1.Prepare wall openings for recessed units. Reference unit submittal for each unit size dimensions. When installing vertical units, consideration should be given for units with an outside air intake.
2.If the unit has leveling legs, adjust them correctly to level unit.
3.Mark the position of the keyslot hanger holes on the wall according to the dimensions given in the Dimensions & Weights section for each unit model and size. Align the hole locations evenly.
4.Insert the threaded rods or lag screws in the wall before setting the unit in place.
5.Remove the front panel (cabinet unit only) by lifting it upward.
6.Position the hanger holes, located on the back of the unit, over the rod or lag screw heads, pushing the unit downward to properly position.
7.Complete piping and wiring connections, in addition to any necessary ductwork to the unit as instructed in the following sections. Ensure that the auxiliary drain pan is in position on
8.Install the front panel before starting the unit.
On cabinet units, replace the front panel by aligning the bottom tabs on the unit with the respective slots on the panel
bottom. Slide the front panel down onto the tabs while holding the panel close as possible to the cabinet. While the bottom tabs are engaged, slide the front panel upward enough to allow the top engaging edge of the front panel to lap over the engaging edge of the unit. This should allow the panel to drop down and lock into position.
On recessed units, install the front panel by aligning and locking together the interlocking support channel of the panel and unit. While holding the panel against the unit, tighten the screws at the top of the panel until it fits tight against the unit’s front. Do not over tighten the screws.
CAUTION
Motor Overload!
All unit panels and filters must be in place prior to unit startup. Failure to have panels and filters in place may cause motor overload.
Horizontal Units
Install horizontal units suspended from the ceiling using the four
Note: Follow the requirements of National Fire Protection Association (NFPA) Standard 90A or 90B, concerning the use of concealed ceiling spaces as return air plenums.
1.Prepare the ceiling opening for recessed units. Reference the unit submittals for dimensions.
2.Position and install the suspension rods or a suspension device (supplied by installer) according to the unit model and size in the Dimensions & Weights section.
3.On cabinet units, remove the bottom panel by using a
4.Level the unit by referencing the chassis end panels. Adjust the suspension device.
5.Complete piping and wiring connections.
necessary ductwork as instructed in the following sections. Ensure that the auxiliary drain pan is in position on fan- coil units.
6.Install the bottom panel before starting the unit.
7.Ensure condensate drain line is pitched one inch per ten feet of pipe away from the
Cabinet units
Install the bottom panel by placing the hinged end on the unit’s hinged end (always at the return end of the unit). Reference the Dimensions & Weights section for keyslot hanger hole locations. Swing the panel upward into position. Secure the panel with the fasteners provided. Do not overtighten the fasteners.
Recessed units
Reference the Dimensions & Weights section for mounting locations and unit weights. Follow the procedure below and reference Figure
1.Insert the mounting bolts through the panel brackets of the trim ring and secure to the hanger holes on the unit. Tighten the mounting bolts to pull the trim ring snug against the finished ceiling.
2.Install the bottom panel by placing the hinged end on the trim ring hinged end (always at the unit’s return end).
3.Adjust the expansion collar’s inner duct (only on
4.Close the
5.Insert retaining screws through bottom panel door and place retaining rings on screws.
6.Swing the bottom panel upward into position. Hook the safety chain to the bottom panel and the unit. Tighten the panel to the unit with the fasteners provided.
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