Carrier WeatherMaster 48HC14 User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480178-01 Printed in U.S.A. Form 48HC-14-03SI Pg 1 3-18 Replaces: 48HC-14-02SI
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 1-6
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . ..2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-65
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . . 6
Step 2 — Plan for Sequence of Unit Installation . 6
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 7
Step 5 — Field Fabricate Ductwork. . . . . . . . . . . . . . . 9
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 9
Step 7 — Convert to Horizontal and Connect
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . . 11
Step 9 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . 13
Step 10 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 13
Step 11 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Step 12 — Make Electrical Connections . . . . . . . . . 16
Humidi-MiZer®System Control Connections . . . . 24
EconoMi$er® X (Factory-Installed Option) . . . . . . . 26
Low Ambient Control (Factory Option) . . . . . . . . . 39
Staged Air Volume (SAV) with Variable Frequency
Drive (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . 39
EconoMi$er X — Ultra Low Leak Economizer
(Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
ComfortLink Controls (Factory Option) . . . . . . . . . 39
PremierLink Controller (Factory Option) . . . . . . . . 44
Supply Air Temperature (SAT) Sensor. . . . . . . . . . 47
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
RTU Open Control System . . . . . . . . . . . . . . . . . . . . . . 54
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Communication Wiring — Protocols . . . . . . . . . . . . 60
Local Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . . . 62
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Step 13 — Adjust Factory-Installed Options. . . . . 64
Step 14 — Install Accessories. . . . . . . . . . . . . . . . . . . 64
Step 15 — Check Belt Tension . . . . . . . . . . . . . . . . . . 64
Pre-Start and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
START-UP CHECKLIST . . . . . . . . . . . . . . . . . CL-1, CL-2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, main-
tenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The quali-
fied installer or agency must use factory-authorized kits or ac-
cessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and have a
fire extinguisher available. Read these instructions thoroughly
and follow all warnings or cautions attached to the unit. Con-
sult local building codes and appropriate national electrical
codes (in USA, ANSI/NFPA 70, National Electrical Code
(NEC); in Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for per-
sonal injury.
Understand the signal words DANGER, WARNING, CAU-
TION, and NOTE. These words are used with the safety-alert
symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signi-
fies hazards which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which may re-
sult in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in en-
hanced installation, reliability, or operation.
48HC units for installation in the United States contain use of Carrier's Staged Air Volume (SAV™) 2-speed
indoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard of
2018.
48HC units for installation outside the United States may or may not contain use of the SAV 2-speed indoor
fan control system as they are not required to comply with the U.S. Department of Energy (DOE) efficiency
standard of 2018.
For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the Variable
Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup, and
Troubleshooting manual.
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect gas piping from unit when leak testing at pres-
sure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig (3450 Pa) will cause gas valve damage resulting in
hazardous condition. If gas valve is subjected to pressure
greater than 0.5 psig (3450 Pa), it must be replaced before
use. When pressure testing field-supplied gas piping at
pressures of 0.5 psig (3450 Pa) or less, a unit connected to
such piping must be isolated by closing the manual gas
valve.
WeatherMaster®
48HC14
Single Package Rooftop Gas Heat/Electric Cooling Unit
with Puron®(R-410A) Refrigerant

2
Rated Indoor Airflow (cfm) — The table below lists
the rated indoor airflow used for the AHRI efficiency rating for
the units covered in this document.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury
or death.
Before performing service or maintenance operations on
unit, always turn off main power switch to unit and install
lock(s) and lockout tag(s). Unit may have more than one
power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
Puron®(R-410A) refrigerant systems operate at higher
pressures than standard R-22 systems. Do not use R-22 ser-
vice equipment or components on Puron refrigerant equip-
ment.
WARNING
CARBON-MONOXIDE POISONING HAZARD
Failure to follow instructions could result in severe person-
al injury or death due to carbon-monoxide poisoning, if
combustion products infiltrate into the building.
Check that all openings in the outside wall around the vent
(and air intake) pipe(s) are sealed to prevent infiltration of
combustion products into the building.
Check that furnace vent (and air intake) terminal(s) are not
obstructed in any way during all seasons.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal injury
or death.
Relieve pressure and recover all refrigerant before system
repair or final unit disposal.
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from refrig-
erants and oils.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing air-conditioning
equipment.
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Inlet pressure tap set screw must be tightened and 1/8in. NPT
pipe plug must be installed to prevent gas leaks.
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Manifold pressure tap set screw must be tightened and
1/8in. NPT pipe plug must be installed to prevent gas leaks.
MODEL NUMBER FULL LOAD AIRFLOW
(CFM)
48HC*D/E/G14 4375
GAS VALVE
INLET PRESSURE
TAP SET SCREW
MANIFOLD
GAS VALVE
MANIFOLD PRESSURE
TAP SET SCREW

3
Fig. 1 — 48HC 14 Model Number Nomenclature (Example)
Model Series - WeatherMasterTM
HC - High Efficiency
Unit Heat Type
48 - Gas Heat Packaged Rooftop
Cooling Tons
14 - 12.5 ton
Heat Options
D = Low Gas Heat
E = Medium Gas Heat
F = High Gas Heat
S = Low Heat w/ Stainless Steel Exchanger
R = Medium Heat w/ Stainless Steel Exchanger
T = High Heat w/ Stainless Steel Exchanger
Sensor Options
A = None
B = RA Smoke Detector
C = SA Smoke Detector
D = RA + SA Smoke Detector
E = CO2
F = RA Smoke Detector and CO2
G = SA Smoke Detector and CO2
H = RA + SA Smoke Detector and CO2
Indoor Fan Options
1 = Standard Static Option - Belt Drive
2 = Medium Static Option - Belt Drive
3 = High Static Option - Belt Drive
C = High Static Option with High Efficiency Motor - Belt Drive
Refrig. Systems Options
D = Two stage cooling model
E = Two stage cooling models with Humidi-MiZer
G = Two stage cooling models with Motor Master
Low Ambient Controller
Coil Options (RTPF) (Outdoor - Indoor - Hail Guard)
A = Al/Cu - Al/Cu
B = Precoat Al/Cu - Al/Cu
C = E-coat Al/Cu - Al/Cu
D = E-coat Al/Cu - E-coat Al/Cu
E = Cu/Cu - Al/Cu
F = Cu/Cu - Cu/Cu
M = Al/Cu -Al/Cu — Louvered Hail Guard
N = Precoat Al/Cu - Al/Cu — Louvered Hail Guard
P = E-coat Al/Cu - Al/Cu — Louvered Hail Guard
Q = E-coat Al/Cu - E-coat Al/Cu — Louvered Hail Guard
R = Cu/Cu - Al/Cu — Louvered Hail Guard
S = Cu/Cu - Cu/Cu — Louvered Hail Guard
Voltage
1 = 575/3/60
5 = 208-230/3/60
6 = 460/3/60
Design Revision
A = Factory Design Revision
Base Unit Controls
0 = Electro-mechanical Controls Can be used with W7212
EconoMi$er IV (Non-Fault Detection and Diagnostic)
1 = PremierLink Controller
2 = RTU Open Multi-Protocol Controller
6 = Electro-mechanical w/ 2-speed fan and W7220 Econo
controller Controls. Can be used with W7220 EconoMi$er X
(with Fault Detection and Diagnostic)
D = ComfortLink Controls
Intake / Exhaust Options
A = None
B = Temperature Economizer w/ Barometric Relief
F = Enthalpy Economizer w/ Barometric Relief
K = 2-Position Damper
U =
Temp Ultra Low Leak Economizer w/ Baro Relief
W = Enthalpy Ultra Low Leak Economizer w/ Baro Relief
Service Options
0 = None
1 = Unpowered Convenience Outlet
2 = Powered Convenience Outlet
3 = Hinged Panels
4 = Hinged Panels and
Unpowered Convenience Outlet
5 = Hinged Panels and
Powered Convenience Outlet
C = Foil Faced Insulation
D = Foil Faced Insulation with
Unpowered Convenience Outlet
E = Foil Faced Insulation with
Powered Convenience Outlet
F = Foil Faced Insulation & Hinged Panels
G = Foil Faced Insulation & Hinged Panels
with Unpowered Convenience Outlet
H = Foil Faced Insulation & Hinged Panels
with Powered Convenience Outlet
Factory Assigned
0 = Standard
1 = LTL
Electrical Options
A = None
B = HACR Breaker
C = Non-Fused Disconnect
D = Thru-The-Base Connections
E = HACR and Thru-The-Base Connections
F = Non-Fused Disconnect and
Thru-The-Base
G = 2-Speed Indoor Fan (VFD) Controller
H = 2-Speed Fan Controller (VFD) and
HACR
J = 2 Speed Fan Controller &
Non-Fused Disconnect
K =
2-Speed Fan Controller w/ Thru-The-Base
L = HACR w/ Thru-The-Base &
2-Speed Fan Controller
M = 2-Speed Fan Controller w/ Non-Fused
Disconnect & Thru-The-Base
Example:
Position:
48HCDE14A2A6A0A3B0
123456789
10 11 12 13 14 15 16 17 18

4
Fig. 2 — Unit Dimensional Drawing — 14 Size Unit

5
Fig. 2 — Unit Dimensional Drawing — 14 Size Unit (cont)

6
Fig. 3 — Service Clearance Dimensional Drawing
INSTALLATION
Jobsite Survey — Complete the following checks before
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 — Select a loca-
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.
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-
tion — The support method used for this unit will dictate dif-
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.
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.
LOCATION DIMENSION CONDITION
A
48-in. (1219 mm)
18-in. (457 mm)
18-in. (457) mm
12-in. (305 mm)
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
B
42-in. (1067 mm)
36-in. (914 mm)
Special
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
C36-in. (914 mm)
18-in. (457 mm)
Side condensate drain is used
Minimum clearance
D
48-in. (1219 mm)
42-in. (1067 mm)
36-in. (914 mm)
Special
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
C
B
A
D

7
CURB-MOUNTED INSTALLATION
Install curb
Install field-fabricated ductwork inside curb
Install accessory thru-base service connection package (af-
fects curb and unit) (refer to accessory installation instructions
for details)
Prepare bottom condensate drain connection to suit planned
condensate line routing (refer to Step 11 for details)
Rig and place unit
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
PAD-MOUNTED INSTALLATION
Prepare pad and unit supports
Check and tighten the bottom condensate drain connection
plug
Rig and place unit
Convert unit to side duct connection arrangement
Install field-fabricated ductwork at unit duct openings
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
FRAME-MOUNTED INSTALLATION — Frame-mount-
ed applications generally follow the sequence for a curb instal-
lation. Adapt as required to suit specific installation plan.
Step 3 — Inspect Unit — Inspect unit for transporta-
tion damage. File any claim with transportation agency.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data plate
agree with power supply provided.
On units with hinged panel option, check to be sure all
latches are snug and in closed position.
Locate the carton containing the outside air hood parts; see
Fig. 11 and 12. Do not remove carton until unit has been rigged
and located in final position.
Step 4 — Provide Unit Support
ROOF CURB MOUNT — Accessory roof curb details and
dimensions are shown in Fig. 4. Assemble and install accesso-
ry roof curb in accordance with instructions shipped with the
curb.
NOTE: The gasketing of the unit to the roof curb is critical for
a watertight seal. Install gasket supplied with the roof curb as
shown in Fig. 4. Improperly applied gasket can also result in
air leaks and poor unit performance.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in Fig. 5.
Refer to Accessory Roof Curb Installation Instructions for ad-
ditional information as required.
Table 1 — Operating Weights
48HC**14
COMPONENT UNITS LB (KG)
BASE UNIT 1430 (649)
ECONOMIZER
Vertical 103 (47)
Horizontal 242 (110)
Powered Outlet 35 (16)
Humidi-MiZer System 90 (41)
CURB
14-in./356 mm 180 (82)
24-in./610 mm 255 (116)

8
Fig. 4 — Roof Curb Details

9
Fig. 5 — Unit Leveling Tolerances
Install insulation, cant strips, roofing felt, and counter flash-
ing as shown. Ductwork must be attached to curb and not to the
unit.
NOTE: If gas and/or electrical connections are not going to
occur at this time, tape or otherwise cover the fittings so that
moisture does not get into the building or conduit in the
interim.
SLAB MOUNT (HORIZONTAL UNITS ONLY) — Pro-
vide a level concrete slab that extends a minimum of 6 in. (150
mm) beyond unit cabinet. Install a gravel apron in front of con-
denser coil air inlet to prevent grass and foliage from obstruct-
ing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT) — A non-combustible sleeper rail can be
used in the unit curb support area. If sleeper rails cannot be
used, support the long sides of the unit with a minimum of 3
equally spaced 4-in. x 4-in. (102 mm x 102 mm) pads on each
side.
Step 5 — Field Fabricate Ductwork
NOTE: Cabinet return-air static pressure (a negative condition)
shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45
in. wg (112 Pa) without economizer.
For vertical ducted applications, secure all ducts to roof curb
and building structure. Do not connect ductwork to unit.
Fabricate supply ductwork so that the cross sectional di-
mensions are equal to or greater than the unit supply duct open-
ing dimensions for the first 18 in. (458 mm) of duct length
from the unit basepan.
Insulate and weatherproof all external ductwork, joints, and
roof openings with counter flashing and mastic in accordance
with applicable codes.
Ducts passing through unconditioned spaces must be insu-
lated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with applica-
ble fire codes.
Step 6 — Rig and Place Unit — When the unit is
ready to be rigged and no longer will be lifted by a fork truck,
the wood protector under the basepan must be removed. Re-
move 4 screws from each base rail. Wood protector will drop to
the ground. See instructions on the unit base rails.
Keep unit upright and do not drop. Spreader bars are not re-
quired. Rollers may be used to move unit across a roof. Level
by using unit frame as a reference. See Table 1 and Fig. 6 for
additional information.
Lifting holes are provided in base rails as shown in Fig. 6.
Refer to rigging instructions on unit.
Before setting the unit onto the curb, recheck gasketing on
curb.
IMPORTANT: If the unit’s gas connection and/or electric
and control wiring is to be routed through the basepan and
the unit is equipped with the factory-installed Thru-the-
Base service option see the following sections:
• Factory-Option Thru-Base Connections (Gas Con-
nection) on page 14
• Factory-Option Thru-Base Connections (Electrical
Connections) on page 22
If using the field--installed Thru-the-Base accessory follow
the instructions provided with the accessory kit.
MAXIMUM ALLOWABLE DIFFERENCE IN. (MM)
A-B B-C A-C
0.5” (13) 1.0” (25) 1.0” (25)
A
B
C
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in damage to roof-
ing materials.
Membrane roofs can be cut by sharp sheet metal edges. Be
careful when placing any sheet metal parts on such roof.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment dam-
age.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck when panels or pack-
aging are removed.
If using top crate as spreader bar, once unit is set, carefully
lower wooden crate off building roof top to ground. Ensure
that no people or obstructions are below prior to lowering
the crate.

10
Fig. 6 — Rigging Details
POSITIONING ON CURB — For full perimeter curbs
CRRFCURB074A00 and 075A00,the clearance between the
roof curb and the front and rear base rails should be 1/4in. (6.4
mm). The clearance between the curb and the end base rails
should be 1/2in. (13 mm). For retrofit applications with curbs
CRRFCURB003A01 and 4A01, the unit should be position as
shown in Fig. 7. Maintain the 15.5 in. (394 mm) and 85/8in.
(220 mm) clearances and allow the 225/16 in. (567 mm) dimen-
sion to float if necessary.
Fig. 7 — Retrofit Installation Dimensions
If the alternative condensate drain location through the bot-
tom of the unit is used in conjunction with a retrofit curb, the
hole in the curb must be moved 12.5 in. (320 mm) towards the
end of the unit. (See Fig. 8.)
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Remove all shipping materials and top skid. Remove extra
center post from the condenser end of the unit so that the con-
denser end of the unit matches Fig. 27 and 28. Recycle or dis-
pose of all shipping materials.
Fig. 8 — Alternative Condensate Drain Hole
Positions
NOTE: If gas and/or electrical connections are not going to
occur at this time, tape or otherwise cover the fittings so that
moisture does not get into the building or conduit in the
interim.
NOTES:
1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not
used.
2. Dimensions in ( ) are in millimeters.
3. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base
rails are centered around the unit center of gravity. Use wooden top to prevent rigging
straps from damaging unit.
UNIT
MAX
WEIGHT
DIMENSIONS
ABC
lb kg in. mm in. mm in. mm
48HC**14 2215 1009 116.0 2945 62.5 1590 59.5 1510
DETAIL “A”
PLACE ALL SEAL STRIP IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
DUCT END
SEE DETAIL “A”
914 - 1371
( 36” - 54” )
“B”
“A”
“C”
IMPORTANT: If the unit has the factory-installed Thru-
the-Base option, make sure to complete installation of the
option before placing the unit on the roof curb. See the fol-
lowing sections:
• Factory-Option Thru-Base Connections (Gas Con-
nection) on page 14
• Factory-Option Thru-Base Connections (Electrical
Connections) on page 22
Original
Position
New Position
(moved 12.5 in.)

11
Step 7 — Convert to Horizontal and Connect
Ductwork (When Required) — Unit is shipped in the
vertical duct configuration. Unit without factory-installed
economizer or return air smoke detector option may be field-
converted to horizontal ducted configuration using accessory
CRDUCTCV002A00. To convert to horizontal configuration,
remove screws from side duct opening covers and remove cov-
ers. See Fig. 9.
Fig. 9 — Horizontal Conversion Panels
Discard the supply duct cover. Install accessory
CRDUCTCV002A00 to cover the vertical supply duct open-
ing. Use the return duct cover removed from the end panel to
cover the vertical return duct opening.
Field-supplied flanges should be attached to horizontal duct
openings and all ductwork should be secured to the flanges. In-
sulate and weatherproof all external ductwork, joints, and roof
or building openings with counter flashing and mastic in accor-
dance with applicable codes.
Do not cover or obscure visibility to the unit’s informative
data plate when insulating horizontal ductwork.
Step 8 — Install Outside Air Hood
ECONOMIZER HOOD REMOVAL AND SETUP —
FACTORY OPTION
1. The hood is shipped in knock-down form and located in
the return air compartment. It is attached to the economiz-
er using two plastic tie-wraps.
2. To gain access to the hood, remove the filter access panel.
(See Fig. 10.)
3. Locate and cut the (2) plastic tie-wraps, being careful to
not damage any wiring. (See Fig. 11.)
4. Carefully lift the hood assembly through the filter access
opening and assemble per the steps outlined in Econo-
mizer Hood and Two-Position Hood on page 12.
Fig. 10 — Typical Access Panel Locations
Fig. 11 — Economizer Hood Package Location
TWO POSITION DAMPER HOOD REMOVAL AND
SETUP — FACTORY OPTION
1. The hood is shipped in knock--down form and assembled
to a metal support tray using plastic stretch wrap. Located
in the return air compartment, the assembly’s metal tray is
attached to the basepan and also attached to the damper
using two plastic tie-wraps.
2. To gain access to the hood, remove the filter access panel.
(See Fig. 10.)
3. Locate the (2) screws holding the metal tray to the base-
pan and remove. In order to remove the screws, it may be
necessary to remove the panel underneath the two-posi-
tion damper. Remove the two screws. Locate and cut the
(2) plastic tie-wraps securing the assembly to the damper.
(See Fig. 12.) Be careful to not damage any wiring or cut
tie-wraps securing any wiring.
4. Carefully lift the hood assembly (with metal tray) through
the filter access opening and assemble per the steps out-
lined in Economizer Hood and Two-Position Hood on
page 12.
FILTER ACCESS PANEL
INDOOR COIL ACCESS PANEL
Economizer
Cut Plastic Ties
(2) Places
Remove Hood Parts

12
5. If removed, reattach the panel under the damper.
Fig. 12 — Two-Position Damper Hood Package
Location
ECONOMIZER HOOD AND TWO-POSITION HOOD
NOTE: If the power exhaust accessory is to be installed on the
unit, the hood shipped with the unit will not be used and must
be discarded. Save the aluminum filter for use in the power
exhaust hood assembly.
1. The indoor coil access panel will be used as the top of the
hood. If the panel is still attached to the unit, remove the
screws along the sides and bottom of the panel. See
Fig. 15.
2. Swing out indoor coil access panel and insert the hood
sides under the panel (hood top). Be careful not to lift the
panel too far as it might fall out. Use the screws provided
to attach the hood sides to the hood top. Use screws pro-
vided to attach the hood sides to the unit. See Fig. 14.
3. Remove the shipping tape holding the economizer baro-
metric relief damper in place.
4. Insert the hood divider between the hood sides. See Fig.
14 and 15. Secure hood divider with 3 screws on each
hood side. The hood divider is also used as the bottom fil-
ter rack for the aluminum filter.
5. Attach the post that separates the filters with the screws
provided.
6. Open the filter clips which are located underneath the
hood top. Insert the aluminum filters into the bottom filter
rack (hood divider). Push the filter into position past the
open filter clips. Close the filter clips to lock the filters
into place. See Fig. 15.
7. Install the two rain deflectors on the edge of the hood top
as shown in Fig. 13.
8. Caulk the ends of the joint between the unit top panel and
the hood top as shown in Fig. 13.
9. Replace the filter access panel.
Fig. 13 — Indoor Coil Access Panel Relocation
Fig. 14 — Economizer Hood Construction
Fig. 15 — Economizer Filter Installation
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
TOP
PANEL
INDOOR
COIL
ACCESS
PANEL
INDOOR
COIL
ACCESS
PANEL
CAULK
HERE
TOP
PANEL
TOP
PANEL
INDOOR COIL
ACCESS PANEL
SCREW
HOOD DIVIDER
LEFT
HOOD
SIDE
DIVIDER
BAROMETRIC
RELIEF
CLEANABLE
ALUMINUM
FILTER FILTER
HOOD
FILTER
CLIP
OUTSIDE
AIR

13
Step 9 — Install Flue Hood — The flue hood is
shipped screwed to the basepan beside the burner compartment
access panel. Remove the panel below the control box access
panel to access the flue hood shipping location. Using screws
provided, install flue hood and screen in location shown in
Fig. 16.
Fig. 16 — Flue Hood Details
Step 10 — Install Gas Piping — Installation of the
gas piping must be accordance with local building codes and
with applicable national codes. In U.S.A., refer to NFPA 54/
ANSI Z223.1 National Fuel Gas Code (NFGC). In Canada, in-
stallation must be in accordance with the CAN/CSA B149.1
and CAN/CSA B149.2 installation codes for gas burning appli-
ances.
This unit is factory equipped for use with Natural Gas fuel
at elevations up to 2000 ft (610 m) above sea level. Unit may
be field converted for operation at elevations above 2000 ft
(610 m) and/or for use with liquefied petroleum fuel. See ac-
cessory kit installation instructions regarding these accessories.
NOTE: In U.S.A. the input rating for altitudes above 2000 ft
(610 m) must be derated by 4% for each 1000 ft (305 m) above
sea level. In Canada the input rating must be derated by 10%
for altitudes of 2000 ft (610 m) to 4500 ft. (1372 m) above sea
level.
For natural gas applications, gas pressure at unit gas connec-
tion must not be less than 5 in. wg (1250 Pa) or greater than 13
in. wg (3240 Pa) while the unit is operating. For liquified
petroleum applications, the gas pressure must not be less than
11 in. wg (2740 Pa) or greater than 13 in. wg (3240 Pa) at the
unit connection.
Table 2 — Natural Gas Supply Line Pressure
Ranges
Table 3 — Liquid Propane Supply Line Pressure
Ranges
The gas supply pipe enters the unit at the burner access pan-
el on the front side of the unit, through the long slot at the
bottom of the access panel. The gas connection to the unit is
made to the 3/4-in. FPT gas inlet port on the unit gas valve.
Manifold pressure is factory-adjusted for NG fuel use. Ad-
just as required to obtain best flame characteristics.
Table 4 — Natural Gas Manifold Pressure Ranges
Manifold pressure for LP fuel use must be adjusted to spec-
ified range. Follow instructions in the accessory kit to make
initial readjustment.
Table 5 — Liquid Propane Manifold Pressure
Ranges
Install a gas supply line that runs to the unit heating section.
Refer to the NFPA 54/NFGC or equivalent code for gas pipe
sizing data. Size the gas supply line to allow for a maximum
pressure drop of 0.5-in. wg (124 Pa) between gas regulator
source and unit gas valve connection when unit is operating at
high-fire flow rate.
The gas supply line can approach the unit in three ways:
horizontally from outside the unit (across the roof), thru-curb/
under unit basepan (accessory kit required) or through unit
basepan (factory-option or accessory kit required). Consult ac-
cessory kit installation instructions for details on these installa-
tion methods. Observe clearance to gas line components per
Fig. 17.
Fig. 17 — Gas Piping Guide
UNIT MIN MAX
48HC**14 5.0 in. wg (1250 Pa) 13.0 in. wg (3240 Pa)
UNIT MIN MAX
48HC**14 11.0 in. wg (2740 Pa) 13.0 in. wg (3240 Pa)
FLUE
HOOD
CONTROL BOX
ACCESS PANEL
UNIT MODEL HIGH FIRE LOW FIRE
48HC**14 3.5 in. wg (872 Pa) 2.0 in. wg (498 Pa)
UNIT HIGH FIRE LOW FIRE
48HC**14 10.0 in. wg (2490 Pa) 5.7 in. wg (1420 Pa)
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to
equipment.
When connecting the gas line to the unit gas valve, the
installer MUST use a backup wrench to prevent damage to
the valve.
STEEL PIPE NOMINAL
DIAMETER (in.)
SPACING OF SUPPORTS X
DIMENSION (ft)
1/26
3/4or 1 8
11/4or larger 10
LEGEND
NFGC — National Fuel Gas Code
* Field supplied.
NOTE: Follow all local codes.
X
BASE UNIT
BASE RAIL
ROOF
CURB
9” MINIMUM CLEARANCE
FOR PANEL REMOVAL
MANUAL GAS
SHUTOFF VALVE
*
GAS
REGULATOR
*
48” MINIMUM
DRIP LEG
PER NFGC
*
FIELD-FABRICATED
SUPPORT
*
FROM
GAS
METER

14
FACTORY OPTION THRU-BASE CONNECTIONS
(GAS CONNECTION) — This service connection kit con-
sists of a 3/4-in. NPT gas adapter fitting (stainless steel), a 1/2-in.
electrical bulkhead connector and a 11/2-in. electrical bulkhead
connector, connected to an “L” bracket covering the embossed
(raised) section of the unit basepan in the condenser section.
See Fig. 18.
Fig. 18 — Thru-the-Base Option, Shipping Position
1. Remove the “L” bracket assembly from the unit (see
Fig. 18).
2. Cut and discard the wire tie on the gas fitting. Hand tight-
en the fitting if it has loosened in transit.
3. Remove connector plate assembly from the “L” bracket
and discard the “L” bracket, but retain the washer head
screws and the gasket (located between the “L” bracket
and the connector plate assembly.)
NOTE: Take care not to damage the gasket, as it is reused in
the following step.
4. Place the gasket over the embossed area in the basepan,
aligning the holes in the gasket to the holes in the base-
pan. See Fig. 19.
5. Install the connector plate assembly to the basepan using
8 of the washer head screws.
NOTE: If gas and/or electrical connections are not going to
occur at this time, tape or otherwise cover the fittings so that
moisture does not get into the building or conduit in the
interim.
The thru-base gas connector has male and female threads.
The male threads protrude above the basepan of the unit; the
female threads protrude below the basepan.
Check tightness of connector lock nuts before connecting
gas piping.
Install a 3/4-in. NPT street elbow on the thru-base gas fitting.
Attach a 3/4-in. pipe nipple with minimum length of 16-in. (406
mm) (field-supplied) to the street elbow and extend it through
the access panel at the gas support bracket. (See Fig. 20.)
Fig. 19 — Completing Installation of Thru-the-
Base Option
Fig. 20 — Gas Line Piping
Other hardware required to complete the installation of the
gas supply line will include a manual shutoff valve, a sediment
trap (drip leg) and a ground-joint union. A pressure regulator
valve may also be required (to convert gas pressure from
pounds to inches of pressure). The manual shutoff valve must
be located within 6-ft (1.83 m) of the unit. The union, located
in the final leg entering the unit, must be located at least 9-in.
(230 mm) away from the access panel to permit the panel to be
removed for service. If a regulator valve is installed, it must be
located a minimum of 4-ft (1220 mm) away from the unit’s
flue outlet. Some municipal codes require that the manual shut-
off valve be located upstream of the sediment trap. See Fig. 21
and 22 for typical piping arrangements for gas piping that has
been routed through the sidewall of the curb. See Fig. 23 for
typical piping arrangement when thru-base is used. Ensure that
all piping does not block access to the unit’s main control box
or limit the required working space in front of the control box.
11/2” ELECTRICAL
BULKHEAD
CONNECTOR
1/2” ELECTRICAL
BULKHEAD
CONNECTOR
3/4” NPT GAS
ADAPTER
FITTING
GASKET
CONNECTOR
PLATE
ASSEMBLY
3/4-in NPT
STREET
ELBOW
THRU-BASE
GAS FITTING
GAS
SUPPORT
BRACKET

15
Fig. 21 — Gas Piping
Fig. 22 — Gas Piping
Fig. 23 — Gas Piping Thru-Base Connections
When installing the gas supply line, observe local codes
pertaining to gas pipe installations. Refer to the NFPA 54/
ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA
B149.1). In the absence of local building codes, adhere to the
following pertinent recommendations:
1. Avoid low spots in long runs of pipe. Grade all pipe 1/4-
inch in every 15 ft (7 mm in every 5 m) to prevent traps.
Grade all horizontal runs downward to risers. Use risers
to connect to heating section and to meter.
2. Protect all segments of piping system against physical
and thermal damage. Support all piping with appropriate
straps, hangers, etc. Use a minimum of one hanger every
6 ft (1.8 m). For pipe sizes larger than 1/2-in., follow rec-
ommendations of national codes.
3. Apply joint compound (pipe dope) sparingly and only to
male threads of joint when making pipe connections. Use
only pipe dope that is resistant to action of liquefied pe-
troleum gases as specified by local and/or national codes.
If using PTFE (Teflon*) tape, ensure the material is Dou-
ble Density type and is labeled for use on gas lines. Apply
tape per manufacturer’s instructions.
4. Pressure-test all gas piping in accordance with local and
national plumbing and gas codes before connecting pip-
ing to unit.
NOTE: Pressure test the gas supply system after the gas supply
piping is connected to the gas valve. The supply piping must
be disconnected from the gas valve during the testing of the
piping systems when test pressure is in excess of 0.5 psig
(3450 Pa). Pressure test the gas supply piping system at pres-
sures equal to or less than 0.5 psig (3450 Pa). The unit heating
section must be isolated from the gas piping system by closing
the external main manual shutoff valve and slightly opening
the ground-joint union.
Check for gas leaks at the field-installed and factory-in-
stalled gas lines after all piping connections have been com-
pleted. Use soap-and-water solution (or method specified by
local codes and/or regulations).
NOTE: If orifice hole appears damaged or it is suspected to
have been re-drilled, check orifice hole with a numbered drill
bit of correct size. Never re-drill an orifice. A burr-free and
squarely aligned orifice hole is essential for proper flame char-
acteristics. See Fig. 24.
* Teflon is a registered trademark of DuPont.
9” (229mm) min
Union
Shut Off
Valve
Drip
Leg
Thru-Curb Adapter
Unit Base Rail
Drip
Leg
Shut Off
Valve
Union
Thru-CurbAdapter
Burner
Access
Panel
9”(229mm) min
Unit Base Rail
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
• Connect gas pipe to unit using a backup wrench to
avoid damaging gas controls.
• Never purge a gas line into a combustion chamber.
• Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifi-
cally for the detection of leaks to check all connec-
tions.
• Use proper length of pipe to avoid stress on gas con-
trol manifold.

16
Fig. 24 — Orifice Hole
Step 11 — Install External Condensate Trap
and Line — The unit has one 3/4-in. condensate drain con-
nection on the end of the condensate pan and an alternate con-
nection on the bottom. See Fig. 25. Unit airflow configuration
does not determine which drain connection to use. Either drain
connection can be used with vertical or horizontal applications.
Fig. 25 — Condensate Drain Pan (Side View)
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do this be-
fore setting the unit in place. The red drain pan can be tightened
with a 1/2-in. square socket drive extension.
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a 1/2-in. square
socket drive extension) and install it in the side drain connec-
tion.
The piping for the condensate drain and external trap can be
completed after the unit is in place. See Fig. 26.
All units must have an external trap for condensate drain-
age. Install a trap at least 4-in. (102 mm) deep and protect
against freeze-up. If drain line is installed downstream from the
external trap, pitch the line away from the unit at 1-in. per 10 ft
(25 mm in 3 m) of run. Do not use a pipe size smaller than the
unit connection (3/4-in.).
Fig. 26 — Condensate Drain Piping Details
Step 12 — Make Electrical Connections
NOTE: Field-supplied wiring shall conform with the limita-
tions of minimum 63°F (3°C) rise.
FIELD POWER SUPPLY — For those units without
through-the-curb power, conduit must be used to route the
main power from the condenser end, via the power entry in the
corner post of the unit (see Fig. 27 and 28) to either the factory
option disconnect or the bottom of the control box. 1-in. con-
duit is provided wrapped around compressor. A second conduit
is provided with factory installed powered convenience outlet.
For those units that require conduit larger than 1-in., it must be
field supplied. Figures 27 and 28 show the wire routings.
If the field disconnect is larger than 100A, it must be at-
tached to the unit using accessory CRDISBKT001A00 — dis-
connect switch bracket (see Fig. 29). Follow the instructions
provided with this accessory. For smaller field disconnects, be
sure to use 1/2-in. screws to mount the disconnect directly to the
end panel (see Fig. 30). In either case, set the disconnect verti-
cal location on the unit so that a 90 degree fitting can be used to
connect the conduit to the disconnect.
BURNER
ORIFICE
DRAIN
(FACTORY-INSTALLED)
PLUG
CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
ALTERNATE
BOTTOM DRAIN
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground. Unit cabinet
must have an uninterrupted, unbroken electrical ground to
minimize the possibility of personal injury if an electrical
fault should occur. This ground may consist of electrical
wire connected to unit ground lug in control compartment,
or conduit approved for electrical ground when installed in
accordance with NEC (National Electrical Code); ANSI/
NFPA 70, latest edition (in Canada, Canadian Electrical
Code CSA [Canadian Standards Association] C22.1), and
local electrical codes.
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4 in. (102 mm) trap is recommended.
MINIMUM PITCH
1˝ (25 mm) PER
10´ (3 m) OF LINE
BASE RAIL
OPEN
VENT
TO ROOF
DRAIN
DRAIN PLUG
ROOF
CURB
SEE NOTE
3˝ (76 mm)
MIN

17
Fig. 27 — Conduit into Factory Option Non-Fused
Disconnect or HACR
Fig. 28 — Conduit into Control Box
Fig. 29 — Mounting Position for Field Disconnects
(over 100A)
Fig. 30 — Mounting Position for Field Disconnects
(up to 100A)
Field power wires are connected to the unit at line-side pres-
sure lugs at the main terminal block (TB1) or at factory-in-
stalled option non-fused disconnect switch or HACR. Refer to
Table 6 for maximum wire size at connection lugs. Use copper
wire only. See Fig. 32.
Table 6 — Connection Lug Min/Max Wire Sizes
NOTE: TEST LEADS — Unit may be equipped with short
leads (pigtails) on the field line connection points off the op-
tional non-fused disconnect switch or HACR. These leads
are for factory run-test purposes only; remove and discard
before connecting field power wires to unit connection
points. Make field power connections directly to line con-
nection pressure lugs only.
MINIMUM MAXIMUM
TB1 in unit control box #14 #1
80A Disconnect Option #14 #4
100A Disconnect Option #8 1/0
25A HACR Option #14 1/0
30A HACR Option #14 1/0
35A HACR Option #14 1/0
40A HACR Option #14 1/0
50A HACR Option #14 1/0
60A HACR Option #14 1/0
70A HACR Option #14 1/0
80A HACR Option #14 1/0
90A HACR Option #14 1/0
100A HACR Option #14 1/0
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not connect aluminum wire between disconnect switch
and air conditioning unit. Use only copper wire. (See
Fig. 31).

18
Fig. 31 — Disconnect Switch and Unit
ALL UNITS — All field wiring must comply with NEC and
all local requirements.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 32 and the unit label diagram
for power wiring connections to the unit power terminal blocks
and equipment ground. Refer to Table 6 for maximum wire
size at connection lugs.
Provide a ground-fault and short-circuit over-current protec-
tion device (fuse or breaker) per NEC Article 440 (or local
codes). Refer to unit informative data plate for MOCP (Maxi-
mum Over-current Protection) device size.
NOTE: Units ordered with factory installed HACR do not
need an additional ground-fault and short-circuit over-current
protection device unless local codes require.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. On 3-phase
units, voltages between phases must be balanced within 2%
and the current within 10%. Use the formula below to deter-
mine the percent of voltage imbalance.
% Voltage Imbalance:
Example: Supply voltage is 230-3-60.
AB = 224 v
BC = 231 v
AC = 226 v
= 227
Determine maximum deviation from average voltage.
(AB) 227 –224 = 3 v
(BC) 231 –227 = 4 v
(AC) 227 –226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance= 100 x
= 1.76%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is to be
connected to a 208-v power supply, the control transformer
must be rewired by moving the black wire with the 1/4-in. fe-
male spade connector from the 230-v connection and moving it
to the 200-v 1/4-in. male terminal on the primary side of the
transformer. Refer to unit label diagram for additional informa-
tion.
NOTE: Check all factory and field electrical connections for
tightness.
UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT OR HACR CIRCUIT
BREAKER — When installing units, provide a disconnect
switch of adequate size per NEC (National Electrical Code).
Disconnect sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per na-
tional or local codes. Do not cover unit informative plate if
mounting the disconnect on the unit cabinet.
IMPORTANT: Never operate a motor where a phase
imbalance in supply voltage is greater than 2%. Use the
following formula to determine the percentage of volt-
age imbalance:
= 100 x max voltage deviation from average voltage
average voltage
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
Average Voltage = 224 + 231 + 226
3
= 681
3
IMPORTANT: If the supply voltage phase imbalance
is more than 2%, contact your local electric utility
company immediately.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate
any applicable Carrier warranty.
4
226

19
Fig. 32 — Power Wiring Connections
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR CIRCUIT BREAKER — The
factory-installed option non-fused disconnect switch (NFD) or
HACR circuit breaker is located in a weatherproof enclosure
located under the main control box. The manual switch handle
is shipped in the disconnect or HACR circuit breaker enclo-
sure. Assemble the shaft and handle to the switch or HACR cir-
cuit breaker at this point. Discard the factory test leads (see
Fig. 32). The factory disconnect is either an 80A or 100A de-
pending on the unit voltage, indoor motor and options.
Fig. 33 — Location of Non-Fused Disconnect
Enclosure
To field install the NFD shaft and handle:
1. Remove the unit front panel (see Fig. 2).
2. Remove (3) hex screws on the NFD enclosure - (2) on the
face of the cover and (1) on the bottom.
3. Remove the front cover of the NFD enclosure.
4. Make sure the NFD shipped from the factory is at OFF
position (the arrow on the black handle knob is at OFF).
5. Insert the shaft with the cross pin on the top of the shaft in
the horizontal position.
6. Measure the tip of the shaft to the top surface of the point-
er to be 3.75 to 3.88 in. (95 to 99 mm) for 80A and 100A
NFD and 3.43 to 3.56 in. (87 to 90 mm) for 200A NFD.
7. Tighten the locking screw to secure the shaft to the NFD.
8. Turn the handle to the OFF position with red arrow point-
ing at OFF.
9. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
10. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
11. Engaging the shaft into the handle socket, re-install (3)
hex screws on the NFD enclosure.
12. Re-install the unit front panel.
Disconnect
per
NEC
11 13 13
L1 L2 L3
CIFC
208/230-3-60
460-3-60
575-3-60
Units Without Disconnect or HACR Option
Units With Disconnect or HACR Option
L1
L2
L3
2
4
6
1
5
Optional
Disconnect
Switch
Disconnect factory test leads; discard.
Factory
Wiring
3
Ground
(GR)
Equip
GR Lug
Equip GR Lug
Ground
(GR)

20
Fig. 34 — Handle and Shaft Assembly for NFD
Fig. 35 — Location of HACR Circuit Breaker
Enclosure
To field install the HACR circuit breaker shaft and handle:
1. Remove the unit front panel (see Fig. 2).
2. Remove (3) hex screws on the HACR circuit breaker en-
closure - (2) on the face of the cover and (1) on bottom.
3. Remove the front cover of the HACR circuit breaker en-
closure.
4. Make sure the HACR circuit breaker shipped from the
factory is at OFF position (the white arrow pointing at
OFF).
5. Insert the shaft all the way with the cross pin on the top of
the shaft in the horizontal position.
6. Tighten the locking screw to secure the shaft to the
HACR circuit breaker.
7. Turn the handle to the OFF position with red arrow point-
ing at OFF.
8. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
9. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
10. Engaging the shaft into the handle socket, re-install (3)
hex screws on the HACR circuit breaker enclosure.
11. Re-install the unit front panel.
Fig. 36 — Handle and Shaft Assembly for HACR
Circuit Breaker
CONVENIENCE OUTLETS
Two types of convenience outlets are offered on 48HC**14
models: non-powered and unit-powered. Both types provide a
125-volt GFCI (ground-fault circuit-interrupter) duplex recep-
tacle rated at 15-A behind a hinged waterproof access cover,
located on the panel beneath the control box. See Fig. 37.
Non-powered type — This type requires the field installation
of a general-purpose 125-volt 15-A circuit powered from a
source elsewhere in the building. Observe national and local
codes when selecting wire size and conduit requirements, fuse
or breaker requirements and disconnect switch size and loca-
tion. Route 125-v power supply conductors into the bottom of
the utility box containing the duplex receptacle.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits may use multiple
disconnects. Check convenience outlet for power status
before opening unit for service. Locate its disconnect
switch, if appropriate, and open it. Lock-out and tag-out
this switch, if necessary.