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DIMENSION
LOCATION
in. (mm)
48 (1219)
18 (457)
A
18 (457)
12 (305)
42 (1067)
B
36 (914)
Special
36 (914)
C
18 (457)
48 (1219)
42 (1067)
D
36 (914)
Special
NOTE: Unit is not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.
INSTALLATION
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb or other)
that provides for 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
Fig. 3.
NOTE: Consider also the effect of adjacent units.
Be sure that unit is installed such that snow will not block the
combustion intake or flue outlet.
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 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
allow for removal and disposal of frost and ice that will form
during the heating-defrost mode as well as allow installation of
condensate trap per requirements. See Install External Condensate
Trap and Line on page 11 for required trap dimensions.
C
B
CONDITION
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 for sources of flue products within 10 ft (3 m) of unit fresh air intake hood.
Side condensate drain is used.
Minimum clearance.
No flue discharge accessory installed, surface is combustible material.
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 Clearances — 50GC-*14 Units
ROOF MOUNT
Check building codes for weight distribution requirements. Unit
operating weight is shown in Table 2.
Table 2 — Operating Weights
50GC-*14
BASE UNIT
ECONOMIZER
VERTICAL
HORIZONTAL
HUMIDI-MIZER
SYSTEM
®
POWERED OUTLET
CURB
14 in. (356 mm)
16 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 be-
fore the unit is placed on the curb. Review the following for rec-
ommended sequences for installation steps.
6
D
A
LB (kg)
1313 (596)
130 (47)
242 (110)
90 (41)
35 (16)
180 (82)
245 (116)
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