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LOCATION
DIMENSION
48-in. (1219 mm)
18-in. (457 mm)
A
18-in. (457) mm
12-in. (305 mm)
42-in. (1067 mm)
36-in. (914 mm)
B
Special
36-in. (914 mm)
C
18-in. (457 mm)
42-in. (1067 mm)
36-in. (914 mm)
D
Special
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 2.
Table 2 — Operating Weights
50HCQA
Base Unit
Economizer
Vertical
Horizontal
Powered Outlet
Curb
14 in. (356 mm)
24 in. (610 mm)
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
before the unit is placed on the curb. Review the following for
recommended sequences for installation steps:
CURB-MOUNTED INSTALLATION
1.
Install curb.
2.
Install field-fabricated ductwork inside curb.
C
B
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
Surface behind servicer is grounded (e.g., metal, masonry wall)
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)
Check sources of flue products within 10-ft of unit fresh air intake hood
Side condensate drain is used
Minimum clearance
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)
Check for adjacent units or building fresh air intakes within 10-ft (3 m) of this unit's flue outlet
Fig. 3 — Service Clearance Dimensional Drawing
UNIT LB (KG)
04
05
495 (225)
580 (263)
610 (277)
80 (36)
80 (36)
80 (36)
105 (48)
105 (48)
105 (48)
32 (15)
32 (15)
32 (15)
110 (50)
110 (50)
110 (50)
145 (66)
145 (66)
145 (66)
CONDITION
3.
Install accessory thru-base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details).
4.
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 10 — Install
External Condensate Trap and Line on page 12 for
details).
06
5.
Rig and place unit.
6.
Install outdoor air hood.
7.
Install condensate line trap and piping.
8.
Make electrical connections.
9.
Install other accessories.
PAD-MOUNTED INSTALLATION
1.
Prepare pad and unit supports.
2.
Check and tighten the bottom condensate drain connection
plug.
3.
Rig and place unit.
4.
Convert unit to side duct connection arrangement.
5.
Install field-fabricated ductwork at unit duct openings.
6.
Install outdoor air hood.
7.
Install condensate line trap and piping.
8.
Make electrical connections.
9.
Install other accessories.
FRAME-MOUNTED INSTALLATION
Frame-mounted applications generally follow the sequence for
a curb installation. Adapt the sequence as required to suit spe-
cific installation plan.
6
D
A
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