Carrier WeatherExpert 48LC 04 Series, WeatherExpert 48LC 06 Series, WeatherExpert48LC 05 Series Installation Instructions Manual
WeatherExpert® 48LC 04-06
Single Package Rooftop
Gas Heating/Electric Cooling Unit
with Puron
Installation Instructions
®
(R-410A) Refrigerant
NOTE: Read the entire instruction manual before starting the
installation.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . 9
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation . . . . 9
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 4 — Provide Unit Support. . . . . . . . . . . . . . . . . . 9
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . 10
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 10
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (when required). . . . . . . . . . . . . . . . . . . 12
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 13
• ECONOMIZER HOOD PACKAGE REMOVAL AND
SETUP - FACTORY OPTION
• ECONOMIZER HOOD
Step 9 — Units with Hinged Panels Only . . . . . . . . . 14
Step 10 — Install Flue Hood . . . . . . . . . . . . . . . . . . . 14
Step 11 — Install Gas Piping. . . . . . . . . . . . . . . . . . . 14
• FACTORY-OPTION THRU-BASE CONNECTIONS
(GAS CONNECTIONS)
Step 12 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Step 13 — Make Electrical Connections . . . . . . . . . 18
• FIELD POWER SUPPLY
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR
• TO FIELD-INSTALL THE NFD SHAFT AND HANDLE:
• TO FIELD-INSTALL THE HACR SHAFT AND
HANDLE:
• UNITS WITHOUT FACTORY-INSTALLED NONFUSED DISCONNECT OR HACR
• ALL UNITS
• CONVENIENCE OUTLETS
• HACR
• FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
• UNITS WITHOUT THRU-BASE CONNECTIONS
• FIELD CONTROL WIRING
• THERMOSTAT
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• HEAT ANTICIPATOR SETTINGS
Humidi-MiZer® Control Connections . . . . . . . . . . . .27
• HUMIDI-MIZER – SPACE RH CONTROLLER
• REHEAT MODES
EconoMi$er® X (Factory-Installed Option). . . . . . . .30
SystemVu™ Controller (Factory-Installed Option) .30
RTU Open Control System. . . . . . . . . . . . . . . . . . . . .30
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Step 14 — Adjust Factory-Installed Options . . . . . .34
• SMOKE DETECTORS
Step 15 — Install Accessories . . . . . . . . . . . . . . . . . .34
Step 16 — Check Belt Tension . . . . . . . . . . . . . . . . .34
• BELT FORCE — DEFLECTION METHOD
• BELT TENSION METHOD
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .34
• START UP WITH ASSISTANT
• STANDARD DISPLAY MODE
• PARAMETERS MODE
• CHANGED PARAMETERS MODE
• DRIVE PARAMETER BACKUP MODE
•CLOCK SET MODE
• I/O SETTINGS MODE
APPENDIX A — VFD OPERATION WITH REMOTE
KEYPAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install,
repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to the
unit, and other safety precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
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
personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the safetyalert symbol. DANGER identifies the most serious hazards
which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices,
which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or
operation.
Catalog No. 04-53480187-01 Printed in U.S.A. Form 48LC-4-6-04SI Pg 1 6-19 Replaces: 48LC-4-6-03SI
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
WARNING
GAS VALVE
INLET PRESSURE
TAP SET SCREW
MANIFOLD
GAS VALVE
MANIFOLD PRESSURE
TAP SET SCREW
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in death, serious
personal injury and/or property damage.
Disconnect gas piping from unit when pressure testing at
pressure greater than 0.5 psig (3450 Pa). Pressures greater
than 0.5 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 0.5 psig, it must be replaced before use. When pressure testing field-supplied gas piping at pressures of
0.5 psig or less, a unit connected to such piping must be
isolated by closing the manual gas valve(s).
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal inju-
ry, death, and/or property damage.
Inlet pressure tap set screw must be tightened and
pipe plug must be installed to prevent gas leaks.
1
/8-in. NPT
AVERTISSEMENT
RISQUE D’INTOXICATION AU MONOXYDE DE
CARBONE
Si ces directives ne sont pas suivies, cela peut entraîner des
blessures graves ou une intoxication au monoxyde de carbone pouvant causer la mort, si des produits de combustion
s’infiltrent dans le bâtiment.
Vérifier que toutes les ouvertures pratiquées dans le mur
extérieur autour du ou des tuyaux d’évent (et de la prise
d’air) sont scellées de manière à empêcher l’infiltration de
produits de combustion dans le bâtiment.
Veiller à ce que la ou les sorties de l’évent de l’appareil de
chauffage (et la prise d’air) ne soient, en aucune façon, obstruées, quelle que soit la saison.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury
or death.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lock(s)
and lockout tag(s). Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit rating
plate. Unit may have more than one power switch.
FIRE HAZARD
Failure to follow this warning could result in personal inju-
ry, death, and/or property damage.
Manifold pressure tap set screw must be tightened and
NPT pipe plug must be installed to prevent gas leaks.
CARBON-MONOXIDE POISONING HAZARD
Failure to follow instructions could result in severe personal
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
1
/8-in.
WARNING
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 service
equipment or components on Puron refrigerant equipment.
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 refrigerants 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.
GENERAL
See Fig. 1 for unit options. See Fig. 2 and 3 for unit dimensions.
See Fig. 4 for corner weights and clearances. See Fig. 5 for base
rail details. See Fig. 6 for thru-the-base charts.
2
Rated Indoor Airflow (cfm)
48LCD006A0A5-0A0A 0
1234567891011 12 13 14 15 16
17 18
Model Series - WeatherExpert
®
LC – Ultra High Efficiency
Unit Heat Type
48 – Gas Heat Packaged Rooftop
Cooling Tons
04 – 3 ton
05 – 4 ton
06 – 5 ton
Heat Options
D = Low Gas Heat
E = Medium Gas Heat
F = High Gas Heat
L = Low NOx – Low Gas Heat
M = Low NOx – Medium Gas Heat
N = Low NOx – High Gas Heat
S = Low Heat w/ Stainless Steel Exchanger
R = Medium Heat w/ Stainless Steel Exchanger
T = High Heat w/ Stainless Steel Exchanger
(Low NOx models include – Stainless Steel HX)
Sens or Options
A = None
B = RA Smoke Detector
C = SA Smoke Detector
D = RA + SA Smoke Detector
E = CO
2
F = RA Smoke Detector and CO
2
G = SA Smoke Detector and CO
2
H = RA + SA Smoke Detector and CO
2
Indoor Fan Options
0 = Standard Electrical (Direct) Drive x13 ECM Motor
2 = Medium Static Belt Drive with VFD controller
3 = High Static Belt Drive with VFD controller
Refrig. Systems Options
0 = Two stage cooling capacity
A = Two stage cooling capacity
with Humidi-MiZer
®
System
Coil Options: Fin/Tube (Condenser- Evaporator - 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
– = Factory Design Revision
Base Unit Controls
0 = Base Electromechanical Controls
1 = RTU Open Multi-Protocol Controller
4 = SystemVu™ Controller
Intake / Exhaust Options
A = None
B =
Temperature Economizer with Barometric Relief
E = Enthalpy Economizer with Barometric Relief
N = Ultra Low Leak Temperature Economizer
with Barometric Relief
R = Ultra Low Leak Enthalpy Economizer with
Barometric 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
Packaging
0 = Standard
1 = LTL
Electrical Options
A = None
B = HACR Breaker
C = Non-Fused Disconnect
D = Thru-The-Base Connections
E = HACR Breaker with
Thru-The-Base Connections
F = Non-Fused Disconnect and
Thru-The-Base Connections
Example:
Position:
Table 1 lists the rated indoor airflow used for the AHRI efficiency rating for the units covered in this document.
Table 1 — Rated Indoor Airflow (cfm)
MODEL NUMBER
48LC**04 1050
48LC**05 1400
48LC**06 1750
FULL LOAD AIRFLOW
(CFM)
Fig. 1 — 48LC 04-06 Model Number Nomenclature
3
Fig. 2 — Dimensional Drawing of Units Built on and After 4/15/19
4
Fig. 3 — Dimensional Drawing for Units Built On and Prior to 4/14/19
5
Fig. 4 — Corner Weights and Clearances
6
Fig. 5 — Base Rail Details
7
Fig. 6 — Thru-the-Base Charts
8
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
interfere with unit lifting or rigging.
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 and around unit as
specified in Fig. 4.
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. For
proper unit operation, adequate combustion and ventilation air
must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI
Z223.1 (American National Standards Institute) and NFPA
(National Fire Protection Association) 54 TIA-54-84-1. In
Canada, installation must be in accordance with the CAN1B149 installation codes for gas burning appliances.
Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.
Locate mechanical draft system flue assembly at least 4 ft
(1.2 m) from any opening through which combustion products
could enter the building, and at least 4 ft (1.2 m) from any adjacent building (or per local code). Locate the flue assembly at
least 10 ft (3.05 m) from an adjacent unit’s fresh air intake
hood if within 3 ft (0.91 m) of same elevation (or per local
code). When unit is located adjacent to public walkways, flue
assembly must be at least 7 ft (2.1 m) above grade.
Select a unit mounting system that provides adequate height to
allow installation of condensate trap per requirements. Refer to
“Step 12 — Install External Condensate Trap and Line” on
page 17 for required trap dimensions.
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 2.
Table 2 — Operating Weights
48LC**
Base Unit 505 (229) 590 (268) 600 (272)
Economizer
Vertical 50 (23) 50 (23) 50 (23)
Horizontal 80 (36) 80 (36) 80 (36)
Humidi-MiZer
Cu Fins 25 (11) 43 (20) 56 (25)
Powered Outlet 35 (16) 35 (16) 35 (16)
Curb
14-in./356 mm 115 (52) 115 (52) 115 (52)
24-in./610 mm 197 (89) 197 (89) 197 (89)
®
System 50 (23) 55 (25) 55 (25)
UNITS LB (KG)
04 05 06
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 curbmounted units, some accessories must be installed on the unit
before the unit is placed on the curb. Review the following for
recommended sequences for installation steps.
CURB-MOUNTED INSTALLATION
1. Install curb
2. Install field-fabricated ductwork inside curb
3. Install accessory thru-base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details)
4. Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to “Step 12 —
Install External Condensate Trap and Line” on page 17 for
details)
5. Rig and place unit
6. Install outdoor-air hood
7. Install flue hood
8. Install gas piping
9. Install condensate line trap and piping
10. Make electrical connections
11. Install other accessories
PAD-MOUNTED INSTALLATION
1. Prepare pad and unit supports
2. Check and tighten the bottom condensate drain connection
plug
3. Rig and place unit
4. Convert unit to side duct connection arrangement
5. Install field-fabricated ductwork at unit duct openings
6. Install outdoor-air hood
7. Install flue hood
8. Install gas piping
9. Install condensate line trap and piping
10. Make electrical connections
11. Install other accessories
FRAME-MOUNTED INSTALLATION
Frame-mounted applications generally follow the sequence for
a curb installation. Adapt as required to suit specific installation plan.
Step 3 — Inspect Unit
Inspect unit for transportation 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.
Step 4 — Provide Unit Support
ROOF CURB MOUNT
Accessory roof curb details and dimensions are shown in Fig. 8
(see page 11). Assemble and install accessory 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. 8. 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. 7. Refer
to Accessory Roof Curb Installation Instructions for additional
information as required.
9
Fig. 7 — Unit Leveling Tolerances
A-B
0.5 (13)
B-C
1.0 (25)
A-C
1.0 (25)
MAXIMUM ALLOWABLE
DIFFERENCE – IN. (MM)
Install insulation, cant strips, roofing felt, and counter flashing
as shown. Ductwork must be attached to curb and not to the
unit. The accessory thru-the-base power and gas connection
package must be installed before the unit is set on the roof
curb. If field-installed thru-the-roof curb gas connections are
desired, use factory-supplied
1
/2-in. pipe coupling and gas plate
assembly to mount the thru-the-roof curb connection to the
roof curb. Gas connections and power connections to the unit
must be field-installed after the unit is installed on the roof
curb.
If electric and control wiring is to be routed through the basepan,
attach the accessory thru-the-base service connections to the basepan in accordance with the accessory installation instructions.
SLAB MOUNT (HORIZONTAL UNITS ONLY)
Provide a level concrete slab that extends a minimum of 6-in.
(150 mm) beyond unit cabinet. Install a gravel apron in front of
condenser coil air inlet to prevent grass and foliage from obstructing 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
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 dimensions are equal to or greater than the unit-supply duct opening
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 insulated
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 applicable fire
codes.
A minimum clearance is not required around ductwork.
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.
Step 6 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are required.
Rollers may be used to move unit across a roof. Level by using
unit frame as a reference. See Table 2 and Fig. 9 for additional
information.
Lifting holes are provided in base rails as shown in Fig. 9. Refer to rigging instructions on unit.
Rigging materials under unit (cardboard or wood) must be removed PRIOR to placing the unit on the roof curb.
When using the standard side drain connection, ensure the red
plug in the alternate bottom connection is tight. Do this before
setting the unit in place. The red drain pan plug can be tightened with a
1
/2-in. square socket drive extension. For further
details, see “Step 12 — Install External Condensate Trap and
Line” on page 17.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
All panels must be in place when rigging. Unit is not designed
for handling by fork truck when packaging is 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.
Before setting the unit onto the curb, recheck gasketing on
curb.
POSITIONING ON CURB
Position unit on roof curb so that the following clearances are
maintained:
and the base rail inside the front and rear, 0.0-in. clearance between the roof curb and the base rail inside on the duct end of
the unit. This will result in the distance between the roof curb
and the base rail inside on the condenser end of the unit being
approximately
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
Flue vent discharge must have a minimum horizontal clearance of 4 ft (1220 mm) from electric and gas meters, gas regulators, and gas relief equipment. Minimum distance between
unit and other electrically live parts is 48-in. (1220 mm).
Flue gas can deteriorate building materials. Orient unit such
that flue gas will not affect building materials. Locate mechanical draft system flue assembly at least 48-in. (1220 mm) from
an adjacent building or combustible material.
NOTE: Installation of accessory flue discharge deflector kit will
reduce the minimum clearance to combustible material to 18-in.
(460 mm).
After unit is in position, remove rigging skids and shipping
materials.
1
/4-in. (6.4 mm) clearance between the roof curb
1
/4-in. (6.4 mm).
10
1-3/4"
TYP
[44.5]
C
ACCESSORY CONVENIENCE
OUTLET WIRING CONNECTOR
FITTING
1/2" [12.7] NPT 1/2" [12.7] NPT
CONTROL WIRING
FITTING
POWER WIRING
3/4" [19] NPT 1 1/4" [31.7] NPT
THRU THE CURB
CRBTMPWR004A01 THRU THE BOTTOM
CRBTMPWR002A01
CONNECTOR PKG. ACC. GAS CONNECTION TYPE GAS FITTING
1 3/4"
[44.5]
1.00"
[25.4]
12-1/2" [317.5] WIDE
INSULATED DECK PANELS
INSULATED DECK PANEL
9-15/16" [252.4] WIDE
"A"
1 3/4"
[44.4]
SEE NOTE #2
2-3/8"
[61]
20-3/4"
[513]
INSIDE
GAS SERVICE PLATE
THRU THE CURB
DRILL HOLE
2" [50.8] @
ASSEMBLY (IF
REQUIRED)
(SEE NOTE #8)
SECTION THRU SIDE
RETURN AIR
SUPPLY AIR
UNIT
[1987.5]
6' 6-1/4"
4' 2"
[1270.0]
"A"
NAIL (FIELD SUPPLIED)
TYPICAL (4) SIDES
7/16"
CERTIFIED DRAWING
SEE VIEW "B"
ROOFING FELT
(FIELD SUPPLIED)
COUNTER FLASHING
(FIELD SUPPLIED)
[11]
CURB ASY, ROOF
THIS DOCUMENT AND THE INFORMATION CONTAINED THEREIN
IS PROPRIETARY TO CARRIER CORPORATION AND SHALL NOT
BE USED OR DISCLOSED TO OTHERS, IN WHOLE OR IN PART,
WITHOUT THE WRITTEN AUTHORIZATION OF CARRIER CORPORATION.
1029120
TOLERANCES ON:
AUTHORIZATION NUMBER TITLE
DIMENSIONS ARE IN INCHES
----
UNLESS OTHERWISE SPECIFIED
1 DEC 2 DEC 3 DEC ANG
PRODUCTION
---
MATERIAL
DRAWING RELEASE LEVEL:
THIRD ANGLE
PROJECTION
ROOFING MATERIAL
(FIELD SUPPLIED)
CANT STRIP
(FIELD SUPPLIED)
RIGID INSULATION
SHEET 5 OF 5
50HJ405012
SIZE DRAWING NUMBER REV
D
-
-
-
DRAFTER CHECKER
ENGINEERING MANUFACTURING
-
MMC 12/16/09 - -
-
T-005, Y-002
WEIGHT:
- PURCH - N/A -
ENGINEERING REQUIREMENTS
SURFACE FINISH MFG/PURCH MODEL (INTERNAL USE ONLY) NEXT DRAWING SCALE DISTRIBUTION
ECN NO.APP'DCHK'DBYDATEREVISION RECORDREV
1067898--MMC4/22/13
(FIELD SUPPLIED)
2 1/4"
[57.2]
14 3/4"
[374.7]
NOTES:
1. ROOFCURB ACCESSORY IS SHIPPED DISASSEMBLED.
2. INSULATED PANELS: 25.4 [1"] THK. POLYURETHANE FOAM, 44.5 [1-3/4] # DENSITY.
3. DIMENSIONS IN [ ] ARE IN MILLIMETERS.
4. ROOFCURB: 18 GAGE STEEL.
5. ATTACH DUCTWORK TO CURB. (FLANGES OF DUCT REST ON CURB).
6. SERVICE CLEARANCE 4 FEET ON EACH SIDE.
7. DIRECTION OF AIR FLOW.
8. CONNECTOR PACKAGE CRBTMPWR002A01 IS FOR THRU-THE-CURB GAS TYPE
PACKAGE CRBTMPWR004A01 IS FOR THRU-THE-BOTTOM TYPE GAS CONNECTIONS.
53 1/2"
[1358.9]
11.42"
[290.0]
A
14"
24"
[356]
[610]
26"
[660.4]
6 3/64"
ROOF CURB
ACCESSORY #
CRRFCURB003A01
CRRFCURB004A01
[153.5]
1 3/4"
[44.4]
4 3/16"
[106.0]
81 3/4"
[827.1]
32 9/16"
[2076.3]
3"
40 3/16"
[76.2]
[1020.8]
VIEW "B"
CORNER DETAIL
[585.8]
23 1/16"
OPENING
RETURN AIR
OPENING
SUPPLY AIR
1 3/4"
[44.5]
[401.6]
15 13/16"
DUCT
GASKET
(FIELD SUPPLIED)
(SUPPLIED WITH CURB)
15 15/32
[392.9]
[800.9]
31 17/32"
1 3/4"
[44.5]
6' 61/4" WAS 6' 7 1/6", 4'2' WAS 4' 2 13/16";
18 GA WAS 16 GA.; 15 13/16" WAS 15 15/16"; NAIL
FIELD SUPPLIED WAS WITH CURB
C
SUPPLY AIR RETURN AIR
1/4"
[7.0]
[115.5]
4 9/16"
Fig. 8 — Roof Curb Details
11
CAUTION - NOTICE TO RIGGERS:
AVERTISSEMENT - REMARQUE À
L’ATTENTION DES MONTEURS
ALL PANELS MUST BE IN PLACE WHEN RIGGING.
TOUS LES CAPOTS DOIVENT ÊTRE EN PLACE AVANT LE LEVAGE
• Hook rigging shackles through holes in base rail, as shown in Detail “A”.
• Use wooden top skid, when rigging, to prevent rigging straps from damaging unit.
• Max weight includes base unit plus shipping pallet plus all available FIOP's which could
be on that size unit.
• "B" dimension is based on base unit (PAC no heat or YAC w/low heat) plus economizer
option only. This dimension may vary slightly with units congured with other FIOP
options.
• Spreader bars required to lift and transport the unit.
• Accrocher les manilles des élingues de levages dans les trous situés dans le rail
de base comme indiqué au Détail « A ».
• Utiliser des cales en bois lors du levage pour éviter que les élingues n’endommagent
le haut de l’appareil.
• Le poids maximum inclut la conguration de base, le poids de la palette d'expédition,
ainsi que toutes les options pouvant être installées en usine (FIOP) pour la
plateforme sélectionnée.
• La dimension de "B" provient de la conguration de base (PAC sans chauage ou
YAC chauage au gaz natufrel) qui inclut l'option economizer seulement. Cette
dimension peut varier légèrement en fonction des diérentes options sélectionnées,
installées en usine (FIOP).
• Barres d'écartement requises pour soulever et transporter l'unité.
PLACE ALL SEAL STRIP IN PLACE
REQUIRED
SPREADER
BARS
“B”
914-1371
(36"- 54")
“C”
BEFORE PLACING UNIT ON ROOF CURB.
INSTALLER TOUTES LES BANDES
D’ISOLATION EN PLACE AVANT DE
PLACER L’APPAREIL SUR LE REBORD
DE TOIT.
DUCT END
PASSAGES CONDUITES
DETAIL A
DÉTAIL « A »
“A”
SEE DETAIL “A”
VOIR DÉTAIL « A »
MODEL
50LC_004
50LC_005
50LC_006
48LC_004
48LC_005
48LC_006
MAX WEIGHT
LB KG
700
830
865
760
895
930
Fig. 9 — Rigging Label
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.
To convert to horizontal configuration, remove screws from
side duct opening covers (see Fig. 10) and remove covers. Use
the screws to install the covers on vertical duct openings with
the insulation-side down. The panels must be inserted into the
notches on the basepan to properly seal. The notches are covered by the tape used to secure the insulation to the basepan
and are not easily seen. See Fig. 11 for position of the notches
318
377
393
345
407
423
AB
IN MM IN MM IN MM
74.5
74.5
74.5
74.5
74.5
74.5
1890
1890
1890
1890
1890
1890
36.5
36.5
36.0
38.0
38.0
37.5
925
925
915
965
965
955
C
33.5
41.5
41.5
33.5
41.5
41.5
48HC500030 A
850
1055
1055
850
1055
1055
in the basepan. Seals around duct openings must be tight. Secure with screws as shown in Fig. 12. Cover seams with foil
duct tape.
Field-supplied flanges should be attached to horizontal duct
openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof
or building openings with counter flashing and mastic in accordance with applicable codes.
Do not cover or obscure visibility to the unit’s informative data
plate when insulating horizontal ductwork.
12
packaged together, attached to a metal support tray using
REMOVABLE HORIZONTAL
SUPPLY DUCT OPENING COVER
REMOVABLE HORIZONTAL
RETURN DUCT OPENING COVER
SCREWS
DUCT COVERS
SHEET METAL
FACE UP
BASEPAN
plastic stretch wrap, and shipped in the return-air compartment behind the indoor coil access panel. The hood 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. 13.)
FILTER ACCESS PANEL
Fig. 10 — Horizontal Conversion Panels
NOTCHES
BASEPAN
NOTCHES
Fig. 11 — Location of Notches
COMPRESSOR
ACCESS PANEL
OUTDOOR-AIR OPENING AND
INDOOR COIL ACCESS PANEL
Fig. 13 — Typical Access Panel Locations
3. Locate the 2 screws holding the metal tray to the basepan
and remove. Locate and cut the 2 plastic tie-wraps
securing the assembly to the damper. (See Fig. 14.) Be
careful to not damage any wiring or cut tie-wraps securing
any wiring.
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
Fig. 12 — Horizontal Duct Panels In Place
Step 8 — Install Outside Air Hood
ECONOMIZER HOOD PACKAGE REMOVAL AND SETUP - FACTORY OPTION
1. The hood is shipped in knock-down form and must be
field-assembled. The indoor coil access panel is used as
the hood top while the hood sides, divider and filter are
Fig. 14 — Economizer Hood Parts Location
4. Carefully lift the hood assembly (with metal tray) through
the filter access opening and assemble per the steps outlined in Economizer Hood, below.
ECONOMIZER 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. Remove the screws along the sides and bottom of
the indoor coil access panel. See Fig. 15.
13
TOP
PANEL
INDOOR
COIL
ACCESS
PANEL
INDOOR
COIL
ACCESS
PANEL
CAULK
HERE
TOP
PANEL
B
TOP
PANEL
INDOOR COIL
ACCESS PANEL
19 1/16”
SCREW
HOOD DIVIDER
LEFT
HOOD
SIDE
33 3/8”
(848mm)
(483mm)
DIVIDER
BAROMETRIC
RELIEF
CLEANABLE
ALUMINUM
FILTER
FILTER
HOOD
FILTER
CLIP
OUTSIDE
AIR
BLOWER
ACCESS
PANEL
Fig. 15 — Indoor Coil Access Panel Relocation
2. Swing out indoor coil access panel and insert the hood
sides under the panel (hood top). Use the screws provided
to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 16.
Fig. 16 — Economizer Hood Construction
3. Remove the shipping tape holding the economizer barometric relief damper in place (economizer only).
4. Insert the hood divider between the hood sides. See
Fig. 16 and Fig. 17. Secure hood divider with 2 screws on
each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.
5. Open the filter clips which are located underneath the
hood top. Insert the aluminum filter into the bottom filter
rack (hood divider). Push the filter into position past the
open filter clips. Close the filter clips to lock the filter into
place. See Fig. 17.
6. Caulk the ends of the joint between the unit top panel and
the hood top.
7. Replace the filter access panel.
Fig. 17 — Economizer Filter Installation
Step 9 — Units with Hinged Panels Only
Relocate latch shipped inside the hinged compressor door to
location shown in Fig. 18 after unit installation. If the unit does
not have hinged panels, skip Step 9 and continue at Step 10.
Fig. 18 — Compressor Door Latch Location
Step 10 — Install Flue Hood
Flue hood is shipped screwed to the basepan beside the burner
compartment access panel. Remove from shipping location and
using screws provided, install flue hood and screen in location
shown in Fig. 19.
Fig. 19 — Flue Hood Details
Step 11 — Install Gas Piping
Installation of the gas piping must be in 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, installation must be in accordance with the
CAN/CSA B149.1 and CAN/CSA B149.2 installation codes
for gas burning appliances.
14
This unit is factory-equipped for use with natural gas (NG) 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 accessory kit installation instructions regarding these accessories.
NOTE: Furnace gas input rate on rating plate is for installation up
to 2000 ft (610 m) above sea level. 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 connection must not be less than 4 in. wg (996 Pa) or greater than
13 in. wg (3240 Pa) while the unit is operating. On 48LCF/N/
T*05-06 (high-heat) units, the gas pressure at unit gas connection must not be less than 5 in. wg (1245 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 13.0 in. wg (3240 Pa) at the
unit connection. See Tables 3 and 4.
Table 3 — Natural Gas Supply Line Pressure Ranges
UNIT MODEL
48LCD/E/L/M/S/R 04, 05, 06
48LCF/N/T
(High Heat units
only)
UNIT
SIZE
05, 06
MIN MAX
4.0 in. wg (996
Pa)
5.0 in. wg
(1245 Pa)
13.0 in. wg (3240
Pa)
13.0 in. wg
(3240 Pa)
CAUTION
EQUIPMENT DAMAGE
Failure to follow this caution may result in equipment damage.
When connecting the gas line to the unit gas valve, the in-
staller MUST use a backup wrench to prevent damage to
the valve.
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. Do not use a pipe size smaller than
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 accessory
kit installation instructions for details on these installation
methods. Observe clearance to gas line components per
Fig. 20.
X
9” MINIMUM CLEARANCE
FOR PANEL REMOVAL
MANUAL GAS
BASE UNIT
SHUTOFF VALVE
1
GAS
REGULATOR
*
/2-in. Size the
*
Table 4 — Liquid Propane Supply Line Pressure
Ranges
UNIT MODEL UNIT SIZE MIN MAX
48LCD/E/S/R 04, 05, 06
48LCF/T
(High Heat units only)
05, 06
11.0 in. wg
(2740 Pa)
11.0 in. wg
(2740 Pa)
13.0 in. wg
(3240 Pa)
13.0 in. wg
(3240 Pa)
The gas supply pipe enters the unit at the burner access panel
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
1
the
/2-in. FPT gas inlet port on the unit gas valve.
Manifold pressure is factory-adjusted for NG fuel use. Adjust
as required to obtain best flame characteristics. See Table 5.
Table 5 — Natural Gas Manifold Pressure Ranges
UNIT MODEL UNIT SIZE HIGH FIRE LOW FIRE
48LCD/E/L/M/S/R 04, 05, 06
48LCF/N/T
(High Heat units only)
05, 06
3.5 in. wg
(872 Pa)
3.5 in. wg
(872 Pa)
1.7 in. wg
(423 Pa)
1.7 in. wg
(423 Pa)
Manifold pressure for liquid propane (LP) fuel use must be adjusted to specified range. Follow instructions in the accessory kit
to make initial readjustment. See Table 6.
Table 6 — Liquid Propane Manifold Pressure Ranges
UNIT MODEL UNIT SIZE HIGH FIRE LOW FIRE
48LCD/E/S/R 04, 05, 06
48LCF/T
(High Heat units only)
05, 06
10.0 in. wg
(2490 Pa)
10.0 in. wg
(2490 Pa)
5.0 in. wg
(1245 Pa)
5.0 in. wg
(1245 Pa)
48” MINIMUM
DRIP LEG
BASE RAIL
FROM
GAS
METER
STEEL PIPE
NOMINAL DIAMETER
1
1
(in.)
1
3
/
4
/
or larger
4
PER NFGC
ROOF
CURB
NFGC – National Fuel Gas Code
Field supplied.
*
NOTE: Follow all local codes.
/
2
or 1
LEGEND
*
FIELD-FABRICATED
SUPPORT
SPACINGOFSUPPORTS
X DIMENSION
(ft)
10
*
6
8
Fig. 20 — Gas Piping Guide (with Accessory
Thru-the-Curb Service Connections)
FACTORY-OPTION THRU-BASE CONNECTIONS (GAS CONNECTIONS)
This service connection kit consists of a
er fitting (brass), two
3
a
/4-in. electrical bulkhead connector, all factory-installed in
1
/2-in. electrical bulkhead connectors and
1
/2-in. NPT gas adapt-
the embossed (raised) section of the unit basepan in the condenser section.
15
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