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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 in-
lets 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.
6
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 — RAV180 Units
Specifications subject to change without notice.
D
A
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 2.
Table 2 — Operating Weights
RAV180
BASE UNIT
ECONOMIZER
VERTICAL
HORIZONTAL
HOT GAS RE-HEAT 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
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.
LB (kg)
1325 (601)
130 (47)
242 (110)
90 (41)
35 (16)
180 (82)
245 (116)
RAV-180-01SI
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