Number One
AirConditbning
l\Mer
Division of
Carrier Corporation
Carrier Parkway • Syracuse, N Y 13221
Single-Package Heat Pumps
INSTALLATION
Rigging and Unit Placement — Inspect unit for
transportation damage. File claim with transporta
tion agency. Do not drop unit. Keep unit upright.
Units are designed to be hoisted only. However,
units with optional shipping skids may be moved
with a fork truck. Use spreader bars over unit to
prevent sling or cable damage to unit. Level unit by
using unit frame as reference. Leveling tolerance is
± 1 /16 in. per linear ft in any direction. See Fig. 1 for
additional information. Unit weight is shown in
Table 1.
Roof Curb — Assemble and install accessory roof
curb in accordance with instructions shipped with
accessory. (In areas of prolonged sub-freezing tem
peratures or heavy snowfall, the use of an 18-in.
high roof curb is recommended. This permits proper
drainage during defrost.) Refer to Fig. 2.
Install insulation, cant strips, roofing and flashing
as required. Ductwork can be installed to roof curb
«OTES;
t, A!i BTift (lanets jnust be in piece when rtg8^ns
2. Oo not bandte unit wsdi 'torit iruciis.
3. Use4«ei)}esan«i4"24>y-4Vor "4-by-4V'of ctenenaons
shown.
© Carrier Corporation 1979
Fig. 1 — Rigging Details
before unit is set in place. Curb should be level. Unit
leveling tolerance is ±1/16 in. per linear ft in any
direction. This is necessary to permit unit drain to
function properly.
Cut hole(s) in roof to accommodate return and
supply ducts only. Refer to accessory installation
instructions.
Roof Mount — Check building codes for weight
distribution requirements.
Alternate Unit Support Methods — Where the
preferred curb or slab mount cannot be used, sup
port unit with sleepers along unit perimeter using
unit curb-support areas. However, if sleepers cannot
be used, support long sides of unit (dimension “A,”
Fig. 3) by three 4-in. by 4-in. pads, equally spaced.
Units may sag if supported by corners only.
Positioning — Position unit so that drifting snow
does not build up on outdoor coil. Provide clear
ances around and above the unit for airflow, safety,
and service access (Fig. 3).
Do not install unit in an indoor location. Do not
locate unit air inlets near exhaust vents or other
sources of contaminated air.
Although unit is weatherproof, guard against
water from higher runoff and overhangs.
Field-Fabricated Ductwork — Secure all ducts to
building structure. Use flexible duct connectors be
tween unit and ducts as required. Insulate and
weatherproof all external ductwork, joints and all
roof openings with flashing and mastic in accord
ance with applicable codes.
Ducts passing thru unconditioned spaces must be
insulated and covered with a vapor barrier.
Unit Duct Connections — Ductwork openings
are shown in Fig. 3.
Economizer Hood Installation, Fig. 4 — The
economizer mechanism and allelectrical connections
are factory installed and adjusted. The hood assem
bly, outdoor air inlet screens and required hardware
are shipped separately and must be field installed.
NOTE: There is a linkage rod and 3 fasteners (speed
nuts) shipped with the economizer hood assembly.
This rod is not required on 50EQ units.
Install economizer hood(s) as follows:
1. Loosen unit top panel sheet metal screws above
outdoor air inlet opening.
2. Assemble hood top panel, side panels and
support channel.
Form 50EQ-4SI
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