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INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1.
Consult local building codes and the NEC (National Elec-
trical Code) ANSI/NFPA 70 for special installation
requirements.
2.
Determine unit location (from project plans) or select unit
location.
3.
Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
IMPORTANT: This equipment has been tested and found to
comply with the limits for a Class A digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user
will be required to correct the interference at his own expense.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb or other)
that provides for at least the minimum clearances required for
safety. This includes the clearance to combustible surfaces, unit
performance and service access below, around and above unit as
specified in unit drawings. Refer to Fig. 2 and 3.
NOTE: Consider the effect of adjacent units. Unit may be installed
directly on wood flooring or on Class A, B, or C roof-covering
material when roof curb is used.
Do not install unit in an indoor location. Do not locate air inlets
near exhaust vents, relief valves, or other sources of contaminated
air.
Although unit is weatherproof, avoid locations that permit water
from higher level runoff and overhangs to fall onto the unit.
Select a unit mounting system that provides adequate height to al-
low installation of condensate trap per requirements. Refer to In-
stall External Condensate Trap and Line on page 18 for required
trap dimensions.
ROOF MOUNT
Check building codes for weight distribution requirements. Unit
operating weight is shown in Table 2.
Table 2 — Operating Weights
50LC*H
BASE UNIT
1360 (618)
ECONOMIZER
Vertical
103 (47)
Horizontal
242 (110)
POWERED OUTLET
35 (16)
CURB
14 in. (356 mm)
180 (82)
24 in. (610 mm)
255 (116)
Step 2 — Plan for Sequence of Unit Installation
The support method used for this unit will dictate different se-
quences for the steps of unit installation. For example, on curb-
mounted units, some accessories must be installed on the unit be-
fore the unit is placed on the curb. Review the following for rec-
ommended sequences for installation steps.
UNIT SIZE lb (kg)
07
08
1430 (650)
1500 (682)
103 (47)
103 (47)
242 (110)
242 (110)
35 (16)
35 (16)
180 (82)
180 (82)
255 (116)
255 (116)
TYPICAL CURB-MOUNTED INSTALLATION
(VERTICAL SUPPLY/RETURN)
1.
Inspect unit.
2.
Install curb.
3.
Install field-fabricated ductwork inside curb.
4.
Install supply air temperature sensor.
5.
Install accessory thru-base service connection package
(optional – affects curb and unit). Refer to accessory
installation instructions for details.
6.
Prepare bottom condensate drain connection to suit
planned condensate line routing (optional – refer to Install
External Condensate Trap and Line on page 18 for details).
7.
Rig and place unit.
8.
Install return air opening cover (optional – 100% outdoor
air applications only).
9.
Install outdoor air hood.
10. Install condensate line trap and piping.
11. Make electrical connections.
12. Setup unit options.
13. Install other accessories.
14. Complete controls setup and equipment start-up (not cov-
ered in this manual).
TYPICAL PAD-MOUNTED INSTALLATION
(HORIZONTAL SUPPLY/RETURN)
1.
Inspect unit.
2.
Prepare pad and unit supports.
3.
Check and tighten the bottom condensate drain
connection.
4.
Plan for condensate drain piping.
5.
Rig and place unit.
6.
Convert unit to side duct connection arrangement.
7.
Install the return air opening cover (100% outdoor air
applications only).
8.
Install field-fabricated ductwork at unit duct openings.
9.
Install supply air temperature sensor.
10. Install outdoor air hood.
11. Install condensate line trap and piping.
12. Make electrical connections.
13. Setup unit options.
14. Install other accessories.
15. Complete controls setup and equipment start-up (not cov-
ered in this manual).
FRAME-MOUNTED INSTALLATION
Frame-mounted applications generally follow the sequence for a
curb installation. Adapt as required to suit specific installation
plan.
12
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim with trans-
portation agency.
Confirm before installation of unit that voltage, amperage and cir-
cuit protection requirements listed on unit data plate agree with
power supply provided.
On units with hinged panel option, check to be sure all latches are
snug and in closed position.
Locate the carton containing the outside air hood parts. See Fig. 14
on page 17 package location. Do not remove carton until unit has
been rigged and located in final position.
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