Installation; Jobsite Survey; Step 1 - Plan For Unit Location; Step 2 - Plan For Sequence Of Unit Installation - Carrier WeatherMaster 48HC14 Installation Instructions Manual

LOCATION
A
B
C
D
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.

INSTALLATION

Complete the following checks before
Jobsite Survey —
installation.
1. Consult local building codes and the NEC (National
Electrical 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 in-
terfere with unit lifting or rigging.
Step 1 — Plan for Unit Location —
tion for the unit and its support system (curb or other) that pro-
vides for at least the minimum clearances required for safety.
This includes the clearance to combustible surfaces, unit per-
formance and service access below, around and above unit as
specified in unit drawings. See Fig. 3.
NOTE: Consider also 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.
C
B
DIMENSION
48-in. (1219 mm)
18-in. (457 mm)
18-in. (457) mm
12-in. (305 mm)
42-in. (1067 mm)
36-in. (914 mm)
Special
36-in. (914 mm)
18-in. (457 mm)
48-in. (1219 mm)
42-in. (1067 mm)
36-in. (914 mm)
Special
Fig. 3 — Service Clearance Dimensional Drawing
Select a loca-
A
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, fiber-
glass)
Check sources of flue products within 10-ft 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, fiber-
glass)
Check for adjacent units or building fresh air intakes within 10-ft (3 m) of this
unit's flue outlet
Do not install unit in an indoor location. Do not locate air in-
lets near exhaust vents, relief valves, or other sources of con-
taminated 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 installation of condensate trap per requirements. Refer
to Step 11 — Install External Condensate Trap and Line for re-
quired trap dimensions.
ROOF MOUNT — Check building codes for weight distri-
bution requirements. Unit operating weight is shown in
Table 1.
Step 2 — Plan for Sequence of Unit Installa-
The support method used for this unit will dictate dif-
tion —
ferent sequences 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 fol-
lowing for recommended sequences for installation steps.
6
D
CONDITION