Lennox LCH Series, LGH036, LGH Series, LGH060, LGH072 Installation Instructions Manual
...
©2019
INSTALLATION
INSTRUCTIONS
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier
Table Of Contents
Dimensions Page 2.................................
Parts Arrangements Page 3.........................
Shipping and Packing List Page 5....................
General Page 5....................................
Requirements Page 5...............................
Unit Support Page 6................................
Duct Connection Page 6............................
Rigging Unit For Lifting Page 7.......................
Horizontal Air Discharge Page 7......................
Condensate Drains Page 7..........................
Gas Piping Page 9.................................
Pressure Test Gas Piping Page 10.....................
LGH/LCH036, 048,
060, 072 & 074
3, 4, 5 and 6 Ton
GAS AND COOLING PACKAGED UNITS
507410-05
4/2019
Supersedes 10/2018
High Altitude Derate Page 10.........................
Electrical Connections Page 11.......................
Blower Operation and Adjustments Page 13............
Cooling Start-Up Page 46............................
Cooling Operation Page 57...........................
Gas Heat Start-Up Page 60...........................
Heating Operation and Adjustments Page 61............
Electric Heat Start-Up Page 62........................
Advanced Air Flow Control Start-Up Page 62............
Hot Gas Reheat Startup Page 65......................
Service Page 67....................................
Factory Unit Controller Settings Page 70...............
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal in
jury. Take care while handling this equipment and
wear gloves and protective clothing.
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
LG STANDARD AND HIGH EFFICIENCY SHOWN
LGH/LCH036, 048, 060, 072 & 074 DIMENSIONS in. - Gas heat section shown
5−5/8
11
(143)
(279)
16−1/4
(413)
18
(457)
45
(1143)
47 (1194)
BASE
END VIEW
1 (25)
AA
7 (178)
29
(737)
47 (1194)
BASE
DD
43−3/8 (1102) 036 thru 074U
35−3/8 (899) 036 thru 048S, H
38−7/8 (987) 036 thru 048S, H
46−7/8 (1191) 060 thru 074S, H
46−7/8 (1191) 036 thru 074U
LIFTING HOLES
(For rigging)
43−3/8 (1102) 060 thru 074S, H
3−1/2 (89)
BOTTOM
RETURN
OPENING
BOTTOM
OPENING
6−5/8
(168)
26−1/2
(673)
CONDENSATE OUTLET
CONDENSATE
OUTLET
(EITHER SIDE)
26−1/2
(673)
AIR
SUPPLY
AIR
CENTER
OF
GRAVITY
BOTTOM
TOP VIEW (Base)
83−1/4
(2115)
FLUE/VENT
OUTLET
5−1/2
(140)
SIDE VIEW
19−1/2
5 (127)
20
(508)
FF
85−1/4 (2165)
BASE
(495)
25−3/4
(654)
9−1/2
(241)
EE
BOTTOM POWER ENTRY
3 X 8 (76 X 203)
ELECTRICAL
INLET
GAS
INLET
15 (381)
27
(686)
11
18−3/8
(467)
(279)
BB
CC
1 (25)
2 (51)
38-7/8 (987) 036 thru 048S, H
46-7/8 (1191) 060 thru 074S, H
46-7/8 (1191) 036 thru 074U
FORKLIFT SLOTS
(Front, Back and
Blower End)
Page 2
20
(508)
HORIZONTAL
SUPPLY AIR
OPENING
HORIZONTAL
5−1/2
RETURN AIR
(140)
OPENING
(Without Economizer)
BACK VIEW
85-1/4 (2165)
BASE
LGH/LCH036, 048, 060, 072, 074
29
(737)
5−1/2
(140)
LGH036, 048, 060S, H & 072, 074H PARTS ARRANGEMENT
FILTERS (4)
036, 048:16 X 20 X 2”
060, 072, 074: 20 X 20 X 2”
ECONOMIZER
(OPTIONAL)
CONDENSATE
DRAIN
COMBUSTION
AIR INDUCER
EVAPORATOR
COIL
BURNERS
REHEAT COIL
(OPTIONAL)
BLOWER
GAS VALVE
TXV
UNIT
CONTROLLER
BLOWER
MOTOR
(BELT DRIVE SHOWN)
COMPRESSOR
CONDENSER
FAN
COIL
GUARDS
(OPTIONAL)
CONDENSER
COIL
LCH036, 048, 060S, H & 072, 074H PARTS ARRANGEMENT
REHEAT COIL
(OPTIONAL)
ELECTRIC HEAT
(Optional)
BLOWER
CONTROLLER
TXV
UNIT
COMPRESSOR
FILTERS (4)
036, 048:16 X 20 X 2”
060, 072, 074: 20 X 20 X 2”
ECONOMIZER
(OPTIONAL)
CONDENSATE
DRAIN
(BELT DRIVE SHOWN)
EVAPORATOR
COIL
BLOWER
MOTOR
CONDENSER
FAN
CONDENSER
COIL
LGH/LCH036, 048, 060, 072, 074
Page 3
LGH036, 048, 060, 074U PARTS ARRANGEMENT
ECONOMIZER
(OPTIONAL)
CONDENSATE
DRAIN
FILTERS (4)
20 X 20 X 2”
GAS VALVE 1
(4-STG. GAS
HEAT SHOWN)
EVAPORATOR
COMBUSTION
AIR INDUCER
COIL
BURNERS
TXV
BLOWER
GAS VALVE 2
(4-STG. GAS
HEAT SHOWN)
CONDENSER
FAN
COIL
GUARDS
(OPTIONAL)
CONDENSER
COIL
COMPRESSOR
UNIT
CONTROLLER
LCH036, 048, 060, 074U PARTS ARRANGEMENT
FILTERS (4)
20 X 20 X 2”
ECONOMIZER
(OPTIONAL)
EVAPORATOR
COIL
CONDENSATE
DRAIN
ELECTRIC
HEAT
TXV
UNIT
CONTROLLER
BLOWER
COMPRESSOR
CONDENSER
FAN
COIL
GUARDS
(OPTIONAL)
CONDENSER
COIL
Page 4
LGH/LCH036, 048, 060, 072, 074
Shipping and Packing List
Package 1 of 1 contains:
1- Assembled unit
Check unit for shipping damage. Receiving party should
contact last carrier immediately if shipping damage is found.
General
These instructions are intended as a general guide
and do not supersede local codes in any way.
Authorities having jurisdiction should be consulted
before installation.
The LGH units are available in several heating inputs. The
LCH cooling packaged rooftop unit is the same basic
design as the LGH unit except for the heating section.
Optional electric heat is available for LCH units. LGH and
LCH units have identical refrigerant circuits with
respective 3, 4, 5, and 6 ton cooling capacities.
Standard and high efficiency units are equipped with a
lightweight, all-aluminum condenser coil; optional fin/tube
condenser coils are available. Ultra high efficiency units are
equipped with fin/tube condenser coils.
Units are equipped with the compressors shown in table 1.
TABLE 1
COMPRESSORS
Unit T'Stat Compressor
072H 2-Stage Single-Speed
036S, 048S, 060S,
036H, 048H, 060H, 074H
036U, 048U, 060U, 074U 2- or 3-Stage
036U, 048U, 060U, 074U Zone Sensor Variable Speed
2- or 3-Stage 2-Step Capacity
Variable Speed,
2-Step Capacity
In addition to standard heating and cooling, hot gas
reheat units provide a dehumidifying mode of operation.
Refer to Reheat Operation section.
High efficiency units may be equipped with a Unit
Controller that is factory-configured for “Advanced Air
Flow Control”. This option allows the installer to enter both
the design-specified supply air CFM and outdoor air
CFM. See the Advanced Air Flow Control Start-Up
section. These units are equipped with a variable speed,
direct drive blower and an economizer.
Availability of units and options varies by brand.
Requirements
WARNING
Electric shock hazard and danger of
explosion. Can cause injury, death or
product or property damage. Turn off
gas and electrical power to unit before
performing any maintenance or
servicing operations on the unit. Follow
lighting instructions attached to unit
when putting unit back into operation
and after service or maintenance.
NOTICE
Roof Damage!
This system contains both refrigerant and oil.
Some rubber roofing material may absorb oil,
causing the rubber to swell. Bubbles in the rubber
roofing material can cause leaks. Protect the roof
surface to avoid exposure to refrigerant and oil
during service and installation. Failure to follow
this notice could result in damage to roof surface.
UNIT CLEARANCES
C
B
D
A
FIGURE 1
1
Unit
Clearance
Service
Clearance
Clearance to
Combustibles36(914)1(25)1(25)1(25)
A
in.(mm)Bin.(mm)Cin.(mm)Din.(mm)
48
(1219)36(914)36(914)36(914)
To p
Clearance
Unob
structed
Unob
structed
See figure 1 for unit clearances.
IMPORTANT
The Clean Air Act of 1990 bans the intentional vent
ing of refrigerant (CFC's and HCFC's) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incar
ceration may be levied for non-compliance.
LGH/LCH036, 048, 060, 072, 074
Minimum Opera
tion Clearance36(914)36(914)36(914)36(914)
Note - Entire perimeter of unit base requires support when elevated above
mounting surface.
1
Service Clearance - Required for removal of serviceable parts.
Clearance to Combustibles - Required clearance to combustible material
(gas units).
Minimum Operation Clearance - Required clearance for proper unit operation.
Page 5
Unob
structed
Use of this unit as a construction heater or air conditioner
is not recommended during any phase of construction.
Very low return air temperatures, harmful vapors and
operation of the unit with clogged or misplaced filters will
damage the unit.
If this unit has been used for heating or cooling of
buildings or structures under construction, the following
conditions must be met or the warranty will be void:
A room thermostat must control the unit. The use of
fixed jumpers that will provide continuous heating or
cooling is not allowed.
A pre-filter must be installed at the entry to the return
air duct.
The return air duct must be provided and sealed to
the unit.
Return air temperature range between 55°F (13°C)
and 80°F (27°C) must be maintained.
Air filters must be replaced and pre-filters must be
removed upon construction completion.
The input rate and temperature rise must be set per
the unit rating plate.
The heat exchanger, components, duct system, air
filters and evaporator coil must be thoroughly
cleaned following final construction clean-up.
The unit operating conditions (including airflow,
cooling operation, ignition, input rate, temperature
rise and venting) must be verified according to these
installation instructions.
Unit Support
In downflow discharge installations, install the unit on a
non-combustible surface only. Unit may be installed on
combustible surfaces when used in horizontal discharge
applications or in downflow discharge applications when
installed on an T1CURB / C1CURB / E1CURB roof
mounting frame.
NOTE - Securely fasten roof frame to roof per local codes.
CAUTION
To reduce the likelihood of supply / return air by
pass and promote a proper seal with the RTU, duct
work / duct drops / diffuser assemblies must be
supported independently to the building structure.
A-Downflow Discharge Application
Roof Mounting with T1CURB / C1CURB / E1CURB
1- The roof mounting frame must be installed, flashed
and sealed in accordance with the instructions
provided with the frame.
2- The roof mounting frame should be square and level
to 1/16” per linear foot (5mm per linear meter) in any
direction.
3- Duct must be attached to the roof mounting frame
and not to the unit; supply and return plenums must
be installed before setting the unit.
Installer's Roof Mounting Frame
Many types of roof frames can be used to install the unit
depending upon different roof structures. Items to keep
in mind when using the building frame or supports are:
1- The base is fully enclosed and insulated, so an
enclosed frame is not required.
2- The frames or supports must be constructed with
non-combustible materials and should be square and
level to 1/16” per linear foot (5mm per linear meter)
in any direction.
3- Frame or supports must be high enough to prevent
any form of moisture from entering unit.
Recommended minimum frame height is 14”
(356mm).
4- Duct must be attached to the roof mounting frame
and not to the unit. Supply and return plenums must
be installed before setting the unit.
5- Units require support along all four sides of unit base.
Supports must be constructed of steel or suitably
treated wood materials.
NOTE-When installing a unit on a combustible surface for
downflow discharge applications, a T1CURB / C1CURB /
E1CURB roof mounting frame is required.
B-Horizontal Discharge Applications
1- Units which are equipped with an optional
economizer and installed in horizontal airflow
applications must use a horizontal conversion kit.
2- Specified installation clearances must be maintained
when installing units. Refer to figure 1.
3- Top of support slab should be approximately 4”
(102mm) above the finished grade and located so no
run-off water from higher ground can collect around
the unit.
4- Units require support along all four sides of unit base.
Supports must be constructed of steel or suitably
treated wood materials.
Duct Connection
All exterior ducts, joints and openings in roof or building
walls must be insulated and weather-proofed with
flashing and sealing compounds in accordance with
applicable codes. Any duct passing through an
unconditioned space must be insulated.
CAUTION
In downflow applications, do not drill or punch
holes in base of unit. Leaking in roof may occur if
unit base is punctured.
Page 6
LGH/LCH036, 048, 060, 072, 074
Rigging Unit For Lifting
Rig unit for lifting by attaching four cables to holes in unit
base rail. See figure 2.
1- Detach wooden base protection before rigging.
2- Remove all six base protection brackets before
setting unit.
3- Connect rigging to the unit base using both holes in
each corner.
4- All panels must be in place for rigging.
UNIT SUPPLY AND RETURN AIR OPENINGS
HORIZONTAL
HORIZONTAL
RETURN AIR
OPENING
SUPPLY AIR
OPENING
5- Place field‐provided H‐style pick in place just above
top edge of unit. Frame must be of adequate
strength and length. (H-style pick prevents damage
to unit.)
Unit
LG
LC
*Maximum weight with all available
factory-installed accessories.
LIFTING POINT SHOULD
BE DIRECTLY ABOVE
CENTER OF GRAVITY
*Weight
Lbs. Kg.
435
960
423
933
IMPORTANT - ALL
PANELS MUST
BE IN PLACE
FOR RIGGING.
CAUTION - Do
not walk on unit.
FIGURE 2
Horizontal Air Discharge
Unit is shipped with panels covering the horizontal supply
and return air openings. Remove horizontal covers and
place over downflow openings for horizontal air discharge.
See figure 3. Secure in place with sheet metal screws.
Units Equipped With An Optional Economizer
1- Remove the horizontal supply air cover and position
over the downflow supply air opening. Secure with
sheet metal screws.
2- Leave the horizontal return air cover in place.
3- Locate the separately ordered horizontal air
discharge kit. Place the kit panel over the downflow
return air opening.
4- Remove and retain the barometric relief dampers and
lower hood.
LGH/LCH036, 048, 060, 072, 074
DOWNFLOW
RETURN AIR
OPENING
DOWNFLOW
SUPPLY AIR
OPENING
FIGURE 3
5- Install return air duct beneath outdoor air intake. See
figure 4. Install barometric relief damper in lower
hood and install in ductwork as shown in figure 4.
HORIZONTAL RETURN AIR DUCTWORK
WITH ECONOMIZER
HORIZONTAL
RETURN AIR
DUCT
INSTALL BAROMETRIC RELIEF DAMPERS
AND HOOD IN RETURN AIR DUCT
FIGURE 4
Condensate Drains
Make drain connection to the drain coupling provided on
unit. Older model units have a 3/4” N.P.T. coupling and
newer model units have a 1” N.P.T. coupling.
Note - The drain pan is made with a glass reinforced
engineered plastic capable of withstanding typical joint
torque but can be damaged with excessive force. Tighten
pipe nipple hand tight and turn an additional quarter turn.
A trap must be installed between drain connection and an
open vent for proper condensate removal. See figure 5 or
6. It is sometimes acceptable to drain condensate onto
the roof or grade; however, a tee should be fitted to the
trap to direct condensate downward. The condensate line
must be vented. Check local codes concerning
condensate disposal. Refer to pages 1 and 2 for
condensate drain location.
Page 7
UNITUNIT
CONDENSATE SIDE DRAIN CONNECTION
CAULK AROUND CONDENSATE COUPLING
Two hinge screws must be removed in addition to the
mullion screws. See figure 8.
UNITS WITH HINGED PANELS
NOTE - Allow clearance to
open doors when installing
condensate piping.
Minimum Pitch
1” (25 mm) per
10' (3 m) of line
OPEN VENT
UNIT
MOUNTING
FRAME
FIGURE 5
CONDENSATE BOTTOM DRAIN CONNECTION
UNIT
DRAIN PAN
CAULK AROUND
CONDENSATE COUPLING
OPEN VENT
CONDENSATE
DRAIN MULLION
REMOVE
TWO
SCREWS
FIGURE 8
2- Lift the front edge of the drain pan and slide pan out
of unit. See figure 9.
REMOVE DRAIN PAN
MOUNTING
FRAME
Minimum Pitch
1” (25 mm) per 10'
(3 m) of line
FIGURE 6
Units are shipped with the drain coupling facing the front
of the unit. Condensate can be drained from the back or
bottom of the unit with the following modifications. The
unit can be installed in either downflow or horizontal air
discharge regardless of condensate drain location.
Rear Drain Connection
1- Remove the condensate drain mullion. See figure 7.
Remove the two panels on each side of the mullion.
CONDENSATE
DRAIN MULLION
FIGURE 7
DRAIN PAN
FIGURE 9
3- Make sure the cap over the unit bottom drain hole is
secure.
4- Rotate the drain pan until the downward slope is
toward the back of the unit. Slide the drain pan back
into the unit. Be careful not to dislodge the cap over
the bottom drain hole.
5- From the back side of the unit, pull the drain pan
coupling through the rear condensate opening.
6- Replace the condensate drain mullion.
Bottom Drain Connection
1- Remove the condensate drain mullion. See figure 7.
2- Lift the front edge of the drain pan and slide pan out
of unit. See figure 9.
3- Turn the drain pan upside down and drill a pilot hole
through the bottom of the drain pan in the center of
the coupling. See figure 10.
Page 8
LGH/LCH036, 048, 060, 072, 074
BOTTOM CONDENSATE DRAIN
CAUTION: Be careful not to
damage the coupling threads
when drilling the hole.
After drilling the pilot
hole, drill a 7/8” hole from
the inside of the pan.
DRILL A PILOT
HOLE IN CENTER
OF COUPLING
FIGURE 10
4- From the inside of the pan, use a Vari-Bit® bit to
enlarge the hole to 7/8”. Do not damage coupling
threads.
5- Remove the cap over the unit bottom drain hole.
6- Slide the drain pan back into the unit.
When making piping connections a drip leg should be
installed on vertical pipe runs to serve as a trap for
sediment or condensate. A 1/8” N.P.T. plugged tap is
located on gas valve for test gauge connection. Refer to
Heating Start-Up section for tap location. Install a ground
joint union between the gas control manifold and the
main manual shut-off valve. See figure 11 for gas supply
piping entering outside the unit. Figure 12 shows
complete bottom gas entry piping.
Compounds used on threaded joints of gas piping shall be
resistant to the action of liquified petroleum gases.
Do not use Teflon® tape to seal gas piping. Use a
moderate amount of pipe compound on the gas pipe only.
Make sure the two end threads are bare.
CAUTION
If a flexible gas connector is required or allowed by
the authority that has jurisdiction, black iron pipe
shall be installed at the gas valve and extend out
side the furnace cabinet.
WARNING
Do not exceed 600 in-lbs (50 ft.-lbs) torque when at
taching the gas piping to the gas valve.
7- From the back side of the unit, pull the drain pan
coupling through the rear condensate opening.
8- From the front side of the unit, move the drain pan
until the bottom coupling settles into the unit bottom
drain opening. Once in place, check to make sure the
coupling is still positioned through the rear
condensate drain hole.
9- Use a field-provided 3/4” plug to seal side drain
connection.
10- Replace the condensate drain mullion.
Connect Gas Piping (Gas Units)
Before connecting field-provided piping, check with gas
company or authorities having jurisdiction for local code
requirements. When installing gas supply piping, length
of run from gas meter must be considered in determining
pipe size for 0.5” w.c. (.12kPa) maximum pressure drop.
Do not use supply pipe smaller than unit gas connection.
Operating pressures at the unit gas connection must be
as shown in table 2.
TABLE 2
OPERATING PRESSURE AT GAS CONNECTION “w.c.
Natural Gas LP / Propane Gas
Min. Max. Min. Max.
036-074 4.5 10.5 11 13
IMPORTANT
Compounds used on threaded joints of gas piping
must be resistant to the actions of liquified petro
leum gases.
OUTSIDE OF UNIT GAS PIPE CONNECTION
TO GAS
VALV E
GROUND
JOINT UNION
TO GAS
SUPPLY
GAS PIPING
SUPPORT
MANUAL MAIN
SHUT-OFF VALVE
FIGURE 11
DRIP LEG
(REFER TO
LOCAL CODES)
LGH/LCH036, 048, 060, 072, 074
Page 9
BOTTOM ENTRY GAS PIPING COMPLETED
TO GAS
VALV E
STREET
ELBOW
GROUND
JOINT UNION
NOTE-In case emergency shut down is required, turn off
the main manual shut-off valve and disconnect main
power to unit. These devices should be properly labeled
by the installer.
PRESSURE TEST GAS LINE
7” NIPPLE
TO GAS
SUPPLY
2-1/2” NIPPLE
MANUAL MAIN
DRIP LEG
Grommets for both gas pipe openings are field provided.
SHUT-OFF VALVE
FIGURE 12
Pressure Test Gas Piping (Gas Units)
When pressure testing gas lines, the gas valve must
be disconnected and isolated. Gas valves can be
damaged if subjected to more than 0.5 psig (3.48kPa).
See figure 13.
NOTE-Codes may require that manual main shut-off
valve and union (furnished by installer) be installed in
gas line external to unit. Union must be of the ground
joint type.
After all connections have been made, check all piping
connections for gas leaks. Also check existing unit gas
connections up to the gas valve; loosening may occur
during installation. Use a leak detection solution or other
preferred means. Do not use matches candles or other
sources of ignition to check for gas leaks.
MANUAL MAIN
SHUT-OFF VALVE
GAS VALVE
CAP
FIGURE 13
High Altitude Derate
Locate the high altitude conversion sticker in the unit
literature bag. Fill out the conversion sticker and affix next
to the unit nameplate.
Refer to table 3 for high altitude adjustments.
TABLE 3
HIGH ALTITUDE DERATE
Altitude Ft.* Gas Manifold Pressure
2000-4500 See Unit Nameplate
4500 And Above Derate 2% / 1000 Ft. Above Sea Level
CAUTION
Some soaps used for leak detection are corrosive
to certain metals. Carefully rinse piping thoroughly
after leak test has been completed. Do not use
matches, candles, flame or othe sources of ignition
to check for gas leaks.
WARNING
Danger of explosion. Can cause injury
or product or property damage. Do not
use matches, candles, flame or other
sources of ignition to check for leaks.
*Units installed at 0-2000 feet do not need to be modified.
NOTE ‐ This is the only permissible derate for these units.
Page 10
LGH/LCH036, 048, 060, 072, 074
Electrical Connections
POWER SUPPLY
Do not apply power or close disconnect switch until
installation is complete. Refer to start-up directions.
Refer closely to unit wiring diagram.
Refer to unit nameplate for minimum circuit ampacity
and maximum fuse size.
1- Units are factory-wired for 230,460,575 volt supply.
For 208V supply
from the 208V terminal on the control transformer.
Move the wire from the transformer 240V terminal to
the 208V terminal. Place the insulated terminal cover
on the unused 240V terminal.
2- Route power through the bottom power entry area
and connect to L1, L2, and L3 on the top of K1 in
control area above compressor. Secure power
wiring with factory-installed wire ties provided in
control box. Route power to TB2 on units equipped
with electric heat. Route power to S48 or CB10 If
unit is equipped with the optional disconnect
switch or circuit breaker. See unit wiring diagram.
, remove the insulated terminal cover
CONTROL WIRING
B-Control Wiring
The Unit Controller will operate the unit from a
thermostat or zone sensor based on the System Mode.
The default System Mode is the thermostat mode. Refer
to the Unit Controller Installation and Setup Guide to
change the System Mode. Use the menu navigation
arrows and select button; see Settings - Install.
Thermostat Mode
1- Route thermostat cable or wires from subbase to
control area above compressor (refer to unit
dimensions to locate bottom and side power entry).
IMPORTANT - Unless field thermostat wires are rated
for maximum unit voltage, they must be routed away
from line voltage wiring. Use wire ties located near the
lower left corner of the controls mounting panel to
secure thermostat cable.
Use18 AWG wire for all applications using remotely
installed electro-mechanical and electronic
thermostats.
2- Install thermostat assembly in accordance with
instructions provided with thermostat.
3- Connect thermostat wiring to Unit Controller on the
lower side of the controls hat section.
CAUTION
Electrostatic discharge can affect electronic com
ponents. Take precautions during unit installation
and service to protect the electronic controls. Pre
cautions will help to avoid control exposure to elec
trostatic discharge by putting the unit, the control
and the technician at the same electrostatic poten
tial. Neutralize electrostatic charge by touching
hands and all tools on an unpainted unit surface,
such as the gas valve or blower deck, before per
forming any service procedure.
A-Thermostat Location
Room thermostat mounts vertically on a standard 2” X 4”
handy box or on any non-conductive flat surface.
Locate thermostat approximately 5 feet (1524mm)
above the floor in an area with good air circulation at
average temperature. Avoid locating the room
thermostat where it might be affected by:
-drafts or dead spots behind doors and in corners
4- Wire as shown in figure 14 for electro-mechanical
and electronic thermostats. If using other
temperature control devices or energy management
systems see instructions and wiring diagram
provided by manufacturer.
IMPORTANT-Terminal connections at the wall plate or
subbase must be made securely. Loose control wire
connections may allow unit to operate but not with proper
response to room demand.
Zone Sensor Mode
The Unit Controller will operate heating and cooling
based on the Unit Controller internal setpoints and the
temperature from the A2 zone sensor. An optional
Network Control Panel (NCP) can also be used to provide
setpoints. A thermostat or return air sensor can be used
as a back-up mode. Make zone sensor wiring
connections as shown in figure 15.
-hot or cold air from ducts
-radiant heat from sun or appliances
-concealed pipes and chimneys
LGH/LCH036, 048, 060, 072, 074
Page 11
24 V POWER
B
K55
A
OCP
FIELD WIRING WITH ELECTRONIC AND ELECTRO-MECHANICAL THERMOSTATS
(Thermostat Mode)
P297
1
A55
2
B
3
4
5
W1
W2
6
7
8
C
9
TO UNIT CONTROLLER
THERMOSTAT INPUTS
R
C
G
W1
S86
2
2
K55−1
7
5
W2
Y1
ALL OTHER THERMOSTAT
Y2
SIGNALS REMAIN CONNECTED
AS SHOWN ON THE RIGHT.
TO R
TO G
TO Y1
J297A
R
C
G
W1
W2
Y1
2
Y2
OCP
P262
10
11
12
J262C
TO PROVIDE SUPERMARKET REHEAT SCHEME
USE S86 DEHUMIDISTAT AND K55.
FIGURE 14
FIELD WIRING IN ZONE SENSOR MODE
(Zone Sensor Mode)
UNIT CONTROLLER
SENSOR
24VAC
RC
AI1
IAQ
SENSOR
HUM
TMP
OUTPUTS
D01
D02
J298
A2 SENSOR
FIGURE 15
C-Hot Gas Reheat or Ultra High Efficiency Units Only -
1- Install humidity sensor in accordance with
instructions provided with sensor. A DDC input may
be used to initiate dehumidification instead of a
sensor.
2- Make wiring connections as shown in figure 14 for
Thermostat Mode or figure 15 for Zone Sensor
Mode. In addition, connect either a humidity
sensor or a dehumidification input. See figure 16
or 17 for humidity sensor wiring or figure 18 for
dehumidification input wiring.
10
Humidity Sensor Cable Applications:
Wire runs of 50 feet (mm) or less:
Use two separate shielded cables containing 20AWG
minimum, twisted pair conductors with overall shield.
Belden type 8762 or 88760 (plenum) or equivalent.
Connect both cable shield drain wires to the Unit
Controller as shown in figure 16.
Wire runs of 150 feet (mm) or less:
Use two separate shielded cables containing 18AWG
minimum, twisted pair conductors with overall shield.
Belden type 8760 or 88760 (plenum) or equivalent.
Connect both cable shield drain wires to the Unit
Controller as shown in figure 16.
FIELD WIRING REHEAT UNITS (Using A Humidity
Sensor With Less Than 150 Ft. Wire Runs)
P298J298A
R
A91
VIN
GND
VO
1
B
C
AI−1
3
4
HUM
5
C
2
6
TMP
7
D
8
DO−1
9
C
10
11
12
P262
J262B
5
Page 12
FIGURE 16
LGH/LCH036, 048, 060, 072, 074
Wire runs over 150 feet (mm):
Use a local, isolated 24VAC transformer such as
Lennox cat #18M13 (20VA minimum) to supply power
to RH sensor as shown in figure 17. Use two shielded
cables containing 20AWG minimum, twisted pair
conductors with overall shield. Belden type 8762 or
88760 (plenum) or equivalent.
FIELD WIRING REHEAT UNITS
(Using A Humidity Sensor With
More than 150 Ft. Wire Runs)
NOT
CONNECTED
A91
VIN
GND
VO
ISOLATED 24V
TRANSFORMER
DRAIN
NOT
CONNECTED
J298A
A55 UNIT
CONTROLLER
P298
1
2
B
3
4
C
5
6
7
D
8
9
10
R
C
AI-1
HUM
TMP
DO-1
C
DO-2
DI-1
FIGURE 17
FIELD WIRING REHEAT UNITS
(Using A Dehumidification Switch)
Blower Operation and Adjustments
Units are equipped with one of three factory-installed
blower options. The ninth character in the model number
identifies the blower as follows:
E= High efficiency three-, four- and five-ton units are
equipped with a variable speed, direct drive blower.
When these units are also equipped with an
economizer and configured for Advanced Air Flow
Control, the installer is able to enter the
design-specified supply and outdoor air CFM into
the Unit Controller. This eliminates the need to
manually take measurements and adjust settings.
See Advanced Air Flow Control Start-Up section.
Ultra high efficiency units are also equipped with a
variable speed, direct drive blower. The installer is
able to enter the design-specified supply air CFM
into the Unit Controller for optimal efficiency. The
Unit Controller calibrates the supply air volume
which eliminates the need to manually take duct
static measurements. Refer to D-Adjusting Unit
CFM - Ultra High Efficiency Direct Drive Blowers.
T= Units are equipped with a two-stage belt drive blower.
B= Units are equipped with a single-stage belt drive
blower.
Note - Six-ton, non-ultra high efficiency units are
available with belt drive blowers only.
J299
7
DEHUMIDIFICATION
SWITCH
Use 24 VAC (R) from any terminal
available on J299−2, −5, or −7.
8
9
10
FIGURE 18
LGH/LCH036, 048, 060, 072, 074
R
DI−4
C
IMPORTANT
Three phase scroll compressors must be phased
sequentially for correct compressor and blower
rotation. Follow “COOLING START-UP” section of
installation instructions to ensure proper compres
sor and blower operation.
Page 13
A-Blower Operation
Refer to the Unit Controller Installation and Setup Guide
to energize blower. Use the menu navigation arrows and
select button; see SERVICE > TEST.
B-Determining Unit CFM
1- The following measurements must be made with air
filters in place.
IMPORTANT - High Efficiency Units On units equipped with direct drive blowers, a low speed
adjustment less than 2/3 of high speed will improve
humidity removal; refer to product data for more
information.
2- With all access panels in place, measure static
pressure external to unit (from supply to return).
Blower performance data is based on static pressure
readings taken in locations shown in figure 19.
Note - Static pressure readings can vary if not taken
where shown.
3- Measure the indoor blower wheel RPM.
4- Referring to the Blower Data tables, use static
pressure and RPM readings to determine unit CFM.
Use the Accessory Air Resistance tables when
installing units with any of the options or accessories
listed. Refer to table 4 or 5 for minimum airflow when
electric heat is installed.
TABLE 4
MINIMUM AIRFLOW-LCH UNITS WITH ELECTRIC
HEAT (DIRECT DRIVE)
kW
LCH036H, U
LCH048H, U
LCH060H, U
LCH074U
Downflow & Horizontal Airflow
CFM
1080
1280
1600
TABLE 5
MINIMUM AIRFLOW-LCH UNITS WITH ELECTRIC
HEAT (BELT DRIVE)
kW
Downflow Horizontal
CFM
30 1900 2000
22.5 1500 1600
15 1200 1300
7.5 1050 1200
C-Adjusting Unit CFM - High Efficiency Direct Drive
Blowers
Note - To adjust CFM on units configured for optional
“Advanced Air Flow Control”, refer to Advanced Air Flow
Control Start-Up section.
The supply CFM can be adjusted by changing Unit
Controller settings. Refer to table 6 for menu paths and
default settings. Adjustments can also be made by using
optional software. Record any CFM changes on the
parameter settings label located on the inside of the
compressor access panel.
INSTALLATIONS WITH DUCTWORK
ROOFTOP UNIT
READING LOCATION
SUPPLY
MAIN
RE
TURN
FIRST BRANCH
OFF OF MAIN RUN
DUCT RUN
LOCATION OF STATIC PRESSURE READINGS
INSTALLATIONS WITH CEILING DIFFUSERS
ROOFTOP UNIT
RETURN AIR
SUPPLY
SUPPLY AIR
READING
LOCATION
SUPPLY AIR
READING
LOCATION
DIFFUSER
FIGURE 19
Page 14
LGH/LCH036, 048, 060, 072, 074
RE
TURN
RETURN AIR
READING
LOCATION
D-Adjusting Unit CFM - Ultra High Efficiency Direct
Drive Blowers
The supply CFM can be adjusted by changing Unit
Controller settings. Refer to table 7 for menu paths and
default settings. Record any CFM changes on the
parameter settings label located on the inside of the
compressor access panel.
CAUTION
The BLOWER CALIBRATION process starts the in
door blower at operational speeds and moves the
economizer damper blades. Before starting this pro
cess, replace any access panels and close all unit
doors except compressor compartment door.
Blower calibration is required only on units that are newly
installed or if there is a change in the duct work or air filters
after installation. After the new CFM values are entered,
use the down and up arrow buttons to select START
CALIBRATION. Push SAVE to start calibration. The
blower calibration status is displayed as a % complete.
Upon successful completion, the Unit Controller will
display CALIBRATION SUCCESS and go back to the
blower calibration screen. Press the MAIN MENU button
to go to the main menu and press the BACK button to go
to the status screen.
If only the CFM values are updated, use the down and up
arrow buttons to select “CALIBRATION DONE”. Push
SAVE to enter the updated values. This selection will not
initiate calibration, resulting in less setup time. Press the
MAIN MENU button to go to the main menu and press the
BACK button to go to the status screen.
IMPORTANT - On ultra high efficiency units, the default
value for Cooling Low CFM is lower than a traditional
singe- or two-speed unit. If operating the unit with a 2- or
3-stage controller (2- or 3-stage thermostat, DDC
controller, etc.), it is recommended to increase the
Cooling Low CFM default value to a suitable level for
part load cooling (typically 60% of full load CFM).
LGH/LCH036, 048, 060, 072, 074
Page 15
TABLE 6
036, 048, 060H DIRECT DRIVE PARAMETER SETTINGS
Parameter
SETUP > TEST & BALANCE > BLOWER
HIGH SPEED 55% 58% 59% Not Applicable
LOW SPEED 28% 33% 36% Not Applicable
SETUP > TEST & BALANCE > DAMPER
BLOWER ON HIGH 0% 0 % 0 % 0 %
BLOWER ON LOW 0% 0% 0% Not Applicable
SETTINGS > RTU OPTIONS > EDIT PARAMETER = 6
BLOWER SMOKE
OUTPUT
SETTINGS > RTU OPTIONS > EDIT PARAMETER = 10 (Applies to Thermostat Mode ONLY)
LGH/LCH Unit Factory Default Settings
036 H4E 048 H4E 060 H4E 036-060 S4T
55% 58% 59% Not Applicable
Field Setting Description
Percentage torque for indoor
blower high speed.
Percentage torque for indoor
blower low speed.
Minimum damper position during
high speed blower operation.
Minimum damper position during
low speed blower operation.
Percentage torque for indoor
blower smoke speed.
FREE COOLING
STAGE-UP DELAY
300 sec. 300 sec. 300 sec. 300 sec. sec
Number of seconds to hold indoor
blower at low speed before switch
ing to indoor blower at high speed.
Installer: Circle applicable unit model number and record any parameter changes under “Field Setting” column. Settings need to be recorded by
installer for use when Unit Controller is replaced or reprogrammed.
TABLE 7
036, 048, 060, 074U DIRECT DRIVE PARAMETER SETTINGS
LGH/LCH036-074U4E Parameter Settings
Parameter
Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT
PARAMETERS = 12
BLOWER SMOKE CFM 1200 1600 2000 2400 CFM Smoke blower speed
SETUP > TEST & BALANCE > BLOWER
BLOWER HEATING HIGH CFM 1200 1600 2000 2000 CFM High heat blower speed
BLOWER HEATING LOW CFM N/A 1250 1250 1250 CFM
BLOWER COOLING HIGH
CFM
BLOWER COOLING LOW CFM 575 750 950 950 CFM Low cooling blower speed
BLOWER VENTILATION CFM 575 750 950 1150 CFM Ventilation blower speed
SETUP > TEST & BALANCE > DAMPER
BLOWER HIGH CFM DAMPER
POS %
BLOWER LOW CFM DAMPER
POS %
POWER EXHAUST DAMPER
POS %
SETTINGS > RTU OPTIONS > EDIT PARAMETERS = 216
POWER EXHAUST DEAD
BAND %
SETTINGS > RTU OPTIONS > EDIT PARAMETER = 10 (Applies to Thermostat Mode ONLY)
FREE COOLING STAGE-UP
DELAY
Factory Setting
036 048 060 074
1100 1450 1825 2200 CFM High cooling blower speed
0% 0% 0% 0% % Minimum damper position for high speed blower operation.
0% 0% 0% 0% % Minimum damper position for low speed blower operation.
50% 50% 50% 50% % Minimum damper position for power exhaust operation.
10% 10% 10% 10% % Deadband % for power exhaust operation.
300
300
300
sec.
sec.
sec.
300
sec.
Field
Setting
Description
Low heat blower speed (applies to 150kBtuh 4-stg. gas heat
only)
Number of seconds to hold indoor blower at low speed before
sec
switching to indoor blower at high speed.
Installer: Circle applicable unit model number and record any parameter changes under “Field Setting” column. Settings need to be recorded
by installer for use when Unit Controller is replaced or reprogrammed.
Page 16
LGH/LCH036, 048, 060, 072, 074
D-Adjusting Unit CFM - Belt Drive Blowers
The blower RPM can be adjusted at the motor pulley.
Loosen Allen screw and turn adjustable pulley clockwise
to increase CFM. Turn counterclockwise to decrease
CFM. See figure 21. Do not exceed minimum and
maximum number of pulley turns as shown in table 8.
TABLE 8
MINIMUM AND MAXIMUM PULLEY ADJUSTMENT
Belt Min. Turns Open Maxi. Turns Open
A Section No minimum 5
E-Blower Belt Adjustment - Belt Drive
Maximum life and wear can be obtained from belts only
if proper pulley alignment and belt tension are
maintained. Tension new belts after a 24-48 hour
period of operation. This will allow belt to stretch and
seat grooves. Make sure blower and motor pulley are
aligned as shown in figure 20.
1- Loosen four bolts securing motor base to mounting
frame. See figure 21.
2- To increase belt tension -
Slide blower motor downward to tighten the belt. This
increases the distance between the blower motor and
the blower housing.
PULLEY ALIGNMENT
ALIGNED
MOTOR
PULLEY
BELT
NOT ALIGNED
BLOWER
PULLEY
FIGURE 20
3- To loosen belt tension -
Slide blower motor upward to loosen the belt. This
decreases the distance between the blower motor
and the blower housing.
4- Tighten four bolts securing motor base to the
mounting frame.
F-Blower Belt Adjustment - Units Equipped With An
Optional Belt Tensioner
1- Remove blower belt.
2- Remove bracket from blower housing. See figure 23.
3- Remove the screw from the back side of the bracket.
4- Move the tensioner to the appropriate adjustment
hole and reinstall screw.
5- Replace bracket.
6- Replace blower belt. See figure 24.
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
SIDE VIEW
MOTOR
TO INCREASE BELT TENSION
1-Loosen four bolts securing motor base to mounting
frame.
2-Slide the motor downward to tighten the belt.
3-Tighten four bolts on motor base.
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
ALLEN
SCREW
PULLEY
BLOWER ASSEMBLY
LOOSEN ALLEN
SCREW TO
ADJUST CFM
LOOSEN FOUR BOLTS AND
SLIDE BLOWER MOTOR
DOWNWARD TO TIGHTEN BELT
FIGURE 21
LGH/LCH036, 048, 060, 072, 074
Page 17
G-Check Belt Tension
Overtensioning belts shortens belt and bearing life.
Check belt tension as follows:
1- Measure span length X. See figure 22.
2- Apply perpendicular force to center of span (X) with
enough pressure to deflect belt 1/64” for every inch
of span length or 1.5mm per 100mm of span length.
Example: Deflection distance of a 40” span would be
40/64” or 5/8”.
Example: Deflection distance of a 400mm span
would be 6mm.
MEASURE BELT TENSION
FORCE
DEFLECTION 1/64” PER INCH OF SPAN
OR 1.5mm PER 100mm OF SPAN
FIGURE 22
3- Measure belt deflection force. For a used belt, the
deflection force should be 5 lbs. (35kPa). A new belt
deflection force should be 7 lbs. (48kPa).
A force below these values indicates an
undertensioned belt. A force above these values
indicates an overtensioned belt.
H-Field-Furnished Blower Drives
For field-furnished blower drives, use page 20 through 44
to determine BHP and RPM required. Reference page 45
to determine the drive kit number. Reference table 9 for
manufacturer's drive numbers.
ADJUST BELT TENSIONER
MAXIMUM
TENSION
INDICATOR SHOULD BE
BETWEEN MINIMUM AND
MAXIMUM TENSION LINES
TENSIONER
FACTORY-SET
POSITION
FIGURE 23
MINIMUM
TENSION
TIGHTEN MOUNTING
BOLT TO 22 LB./FT.
USING 9/16” WRENCH
BRACKET
TIGHTEST
BELT
POSITION
TIGHTER
BELT
POSITION
Page 18
LGH/LCH036, 048, 060, 072, 074
INSTALL BELT
TENSIONER
1
2
3
DRIVER
PULLEY
DRIVEN
PULLEY
ROTATE DRIVEN
PULLEY TO SEAT BELT
4
FIGURE 24
LGH/LCH036, 048, 060, 072, 074
Page 19
70% 80% 90% 100%
70% 80% 90% 100%
Percentage of Total Motor Torque
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
- - - - - - - - - - - - - - - - - - - - - 1251 433 1189 1373 495 1207 1494 558 1225
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
Percentage of Total Motor Torque
20% 30% 40% 50% 60%
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
BLOWER DATA - LGH DIRECT DRIVE - 3 TON - HIGH EFFICIENCY
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE.FOR ALL UNITS ADD:
1 - Any factory installed options air resistance (heat section, economizer, etc.).
2 - Any eld installed accessories air resistance (duct resistance, diffuser, etc.).
See page 45 for wet coil and options/accessory air resistance data.
NOTE - Default Speed Settings (percentage of blower torque) - Low 28% / High 55%
Static
Press.
DOWNFLOW
in. w.g.
External
0 796 39 407 975 69 451 1154 98 494 1298 140 567 1442 181 639 1570 236 692 1697 292 744 1807 357 785 1917 422 825
0.1 719 44 482 915 76 523 1110 108 564 1257 151 626 1404 193 687 1537 248 733 1670 304 779 1784 369 815 1898 433 850
0.2 663 49 538 864 83 585 1064 117 633 1220 160 679 1375 203 725 1508 259 770 1641 316 815 1754 384 853 1866 452 891
0.3 593 55 607 806 91 651 1018 126 695 1174 171 737 1330 216 780 1471 272 815 1612 328 850 1724 398 890 1835 469 930
0.4 527 60 665 749 97 708 971 135 751 1136 180 783 1300 225 815 1435 285 858 1569 344 900 1689 413 930 1809 481 959
0.5 460 65 722 692 104 761 924 143 801 1090 190 833 1256 238 866 1398 296 899 1540 355 932 1662 424 960 1784 493 988
0.7 - - - - - - - - - - - - - - - - - - 808 161 898 995 209 922 1181 258 946 1325 319 976 1468 379 1007 1588 450 1036 1708 522 1065
0.6 - - - - - - - - - - - - - - - - - - 855 154 864 1033 202 889 1211 250 914 1361 308 939 1511 365 963 1629 437 995 1746 508 1028
Page 20
0.8 - - - - - - - - - - - - - - - - - - 743 170 942 940 220 966 1137 269 991 1281 331 1020 1425 392 1049 1548 463 1074 1670 533 1100
0.9 - - - - - - - - - - - - - - - - - - 676 178 979 884 229 1006 1092 280 1033 1237 342 1061 1381 404 1088 1513 472 1105 1645 539 1121
1.0 - - - - - - - - - - - - - - - - - - 605 187 1011 819 240 1049 1032 294 1087 1192 353 1100 1352 411 1112 1474 480 1137 1595 549 1161
1.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 988 304 1124 1142 364 1141 1295 424 1158 1420 490 1177 1544 555 1195
1.2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
HORIZONTAL
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1166 434 1222 1265 481 1234 1364 527 1246
20% 30% 40% 50% 60%
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
Static
External
0 807 44 372 982 65 431 1157 86 490 1299 126 546 1441 167 602 1565 214 647 1688 262 692 1795 328 734 1901 393 776
Press.
in. w.g.
0.1 708 50 468 906 77 513 1103 104 559 1247 143 612 1391 183 666 1522 231 704 1652 280 742 1766 346 779 1879 413 815
0.2 634 56 541 841 88 583 1048 120 625 1206 156 663 1363 192 701 1491 243 742 1619 294 783 1731 361 820 1843 429 857
0.3 523 63 648 759 98 669 994 134 690 1150 171 729 1306 209 769 1446 258 796 1585 307 823 1696 376 860 1807 444 896
0.4 437 69 732 688 107 742 939 146 752 1101 183 785 1263 221 818 1399 273 849 1535 326 881 1653 392 908 1771 458 935
0.5 344 75 823 615 116 817 885 156 812 1053 194 838 1220 232 865 1361 285 892 1502 339 918 1614 406 949 1725 473 980
0.6 - - - - - - - - - - - - - - - - - - 817 167 883 990 207 905 1162 246 927 1307 301 949 1451 356 971 1570 420 993 1689 484 1014
0.7 - - - - - - - - - - - - - - - - - - 762 174 938 941 215 954 111 9 256 971 1269 312 988 1418 367 1005 1536 430 1026 1653 494 1047
0.8 - - - - - - - - - - - - - - - - - - 708 178 991 892 222 1002 1076 266 1013 1222 324 1034 1368 383 1054 1484 444 1073 1599 506 1092
0.9 - - - - - - - - - - - - - - - - - - 645 182 1050 832 230 1059 1019 277 1068 1168 337 1084 1317 397 1100 1431 456 1117 1545 516 1134
1.0 - - - - - - - - - - - - - - - - - - 584 184 1105 780 235 1106 976 285 1107 1122 348 1125 1267 4 11 1144 1379 467 1158 1491 522 1172
1.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 923 295 1155 1070 359 1169 1217 423 1184 1327 475 1195 1436 526 1207
1.2 - - - - - -
70% 80% 90% 100%
70% 80% 90% 100%
Percentage of Total Motor Torque
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
Percentage of Total Motor Torque
- - - - - - - - - - - - - - - - - - - - - - - - 1253 436 1190 1355 495 1207 1456 554 1225
20% 30% 40% 50% 60%
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
BLOWER DATA - LCH DIRECT DRIVE - 3 TON - HIGH EFFICIENCY
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE.
FOR ALL UNITS ADD:
1 - Any factory installed options air resistance (heat section, economizer, etc.).
2 - Any eld installed accessories air resistance (duct resistance, diffuser, etc.).
See Page 45 for blower motors and drives and wet coil and options/accessory air resistance data.
Static
DOWNFLOW
External
0 785 38 407 969 68 468 1152 98 529 1301 140 581 1449 182 634 1571 236 683 1693 290 732 1799 352 770 1904 414 809
Press.
in. w.g.
0.1 720 44 475 919 74 522 111 7 104 569 1264 150 626 1411 195 684 1539 248 724 1667 301 765 1772 366 805 1877 431 844
0.2 645 50 550 851 83 593 1056 116 637 1218 161 680 1380 205 722 1509 259 762 1638 313 802 1744 380 840 1849 446 879
0.3 570 56 620 793 90 651 1016 124 681 1175 172 730 1334 220 779 1468 274 813 1601 328 846 1708 396 883 1815 464 920
0.4 505 60 678 731 97 712 956 135 746 1130 182 781 1303 229 815 1434 286 852 1564 342 889 1676 410 920 1787 477 951
0.5 432 65 740 663 105 775 895 145 810 1076 194 839 1257 243 867 1396 298 895 1534 353 923 1647 421 952 1759 489 981
0.6 - - - - - - - - - - - - - - - - - - 855 152 852 1033 204 884 1211 256 917 1351 312 944 1490 369 971 1604 437 997 1718 505 1024
0.7 - - - - - - - - - - - - - - - - - - 792 163 916 986 213 933 1180 264 949 1320 321 975 1460 379 1002 1575 447 1026 1690 515 1050
0.9 - - - - - - - - - - - - - - - - - - 674 183 1034 881 234 1037 1088 286 1039 1230 346 1064 1371 406 1088 1490 471 1106 1608 537 1123
0.8 - - - - - - - - - - - - - - - - - - 734 173 975 934 224 985 1134 275 995 1275 334 1021 1416 393 1046 1533 460 1067 1649 527 1088
Page 21
1.0 - - - - - - - - - - - - - - - - - - 613 193 1095 820 246 1094 1026 300 1093 1184 357 1104 1342 414 1115 1448 480 1140 1553 547 1165
1.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 980 309 1131 1139 367 1142 1297 425 1154 1404 488 1173 1511 551 1192
1.2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
HORIZONTAL
1.0 - - - - - - - - - - - - - - - - - - 592 190 1197 781 241 1154 970 291 1113 111 4 352 1130 1258 413 1147 1355 467 1161 1452 520 1176
1.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 915 300 1162 1067 362 1171 1219 424 1180 1312 473 1192 1405 522 1204
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1168 437 1223 1248 480 1235 1329 523 1246
1.2 - - -
20% 30% 40% 50% 60%
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
Static
External
0 796 43 372 975 64 447 1155 85 524 1302 126 560 1448 168 597 1566 214 639 1684 260 680 1786 323 720 1888 386 761
Press.
in. w.g.
0.1 709 50 461 909 75 512 111 0 101 564 1254 143 613 1398 185 662 1523 231 695 1649 277 729 1754 344 769 1858 411 810
0.2 617 57 553 828 88 591 1040 118 629 1204 156 664 1368 194 698 1492 243 734 1616 291 771 1721 358 808 1826 424 845
0.3 503 64 662 747 97 668 992 131 676 1151 172 722 1310 212 768 1442 260 794 1574 308 820 1681 374 853 1787 440 887
0.4 419 69 747 671 107 746 924 146 747 1095 185 782 1266 225 818 1398 275 844 1530 325 870 1640 389 899 1749 454 927
0.5 323 75 843 589 117 832 857 159 821 1039 198 844 1221 237 867 1359 287 888 1496 337 909 1598 403 941 1701 470 973
0.6 - - - - - - - - - - - - - - - - - - 817 165 871 990 208 900 1162 252 929 1296 306 954 1431 360 979 1546 421 995 1662 481 1010
0.7 - - - - - - - - - - - - - - - - - - 747 176 957 933 219 966 1118 262 974 1264 314 987 1410 367 1000 1523 427 1016 1636 487 1032
0.8 - - - - - - - - - - - - - - - - - - 700 181 1026 886 226 1022 1073 271 1018 1216 327 1035 1359 383 1051 1469 442 1066 1579 501 1081
0.9 - - - - - - - - - - - - - - - - - - 643 187 111 0 829 235 1091 1015 283 1073 1161 341 1087 1307 399 1101 1409 456 111 8 1510 513 1136
Percentage of Total Motor Torque
- - - - - - - - - - - - - - - - - - - - - 1765 701 1272 1844 771 1293 1923 840 1314
Percentage of Total Motor Torque
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1604 651 1284 1684 714 1303 1763 777 1321
20% 30% 40% 50% 60% 70% 80% 90% 100%
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
BLOWER DATA - LGH DIRECT DRIVE - 4 TON - HIGH EFFICIENCY
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE.FOR ALL UNITS ADD:
1 - Any factory installed options air resistance (heat section, economizer, etc.).
2 - Any eld installed accessories air resistance (duct resistance, diffuser, etc.).
See page 45 for wet coil and options/accessory air resistance data.
NOTE - Default Speed Settings (percentage of blower torque) - Low 40% / High 80%
Static
Press.
DOWNFLOW
in. w.g.
External
0 1048 80 507 1261 135 582 1473 190 657 1655 274 729 1836 359 801 1987 461 863 2137 563 924 2291 698 975 2445 832 1025
0.1 1000 88 560 1218 146 633 1436 204 706 1624 289 771 1812 374 836 1965 479 896 2118 583 956 2261 716 1004 2403 849 1052
0.2 944 97 624 1177 156 683 1409 214 743 1595 304 812 1781 393 881 1940 497 934 2098 602 986 2235 729 1032 2372 856 1077
0.3 906 104 666 1139 166 728 1372 228 790 1561 320 858 1750 412 925 1915 515 970 2079 619 1015 2210 741 1058 2341 863 1100
0.4 849 113 728 1093 177 783 1336 241 837 1531 333 897 1726 425 957 1889 532 1004 2052 639 1051 2177 754 1090 2302 869 1129
0.5 793 121 790 1047 188 837 1300 254 883 1501 346 935 1702 438 987 1864 548 1036 2026 657 1085 2145 766 1120 2263 874 1155
0.7 - - - - - - - - - - - - - - - - - - 1226 280 974 1433 375 1019 1639 470 1065 1807 578 1104 1974 686 1144 2080 782 1173 2186 878 1203
0.6 - - - - - - - - - - - - - - - - - - 1263 267 929 1467 361 978 1671 454 1027 1836 564 1071 2000 673 1116 2116 775 1145 2232 876 1175
Page 22
0.8 - - - - - - - - - - - - - - - - - - 1195 291 1012 1402 388 1057 1608 485 1101 1778 591 1135 1948 697 1169 2052 787 1195 2155 878 1220
0.9 - - - - - - - - - - - - - - - - - - 1162 304 1060 1367 401 1097 1572 498 1134 1741 603 1168 1909 708 1202 2009 792 1223 2109 875 1244
1.0 - - - - - - - - - - - - - - - - - - 1133 316 1104 1333 414 1136 1533 511 1167 1702 612 1198 1870 714 1229 1959 791 1251 2047 868 1272
1.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1490 524 1200 1654 618 1228 1817 713 1256 1909 786 1273 2000 859 1289
1.2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
HORIZONTAL
20% 30% 40% 50% 60% 70% 80% 90% 100%
Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM Cfm Watts RPM
0 1025 80 472 1238 131 552 1450 182 632 1626 254 702 1802 326 771 1936 414 824 2071 502 878 2231 634 931 2391 767 983
0.2 927 89 602 1157 145 661 1387 201 720 1568 279 783 1749 357 845 1906 458 897 2062 559 949 2205 679 993 2348 798 1038
in. w.g.
0.1 978 85 546 1199 138 610 1420 191 675 1601 265 738 1781 339 801 1930 441 862 2079 544 923 2222 663 968 2365 783 1013
Static
Press.
External
0.3 851 98 684 1098 156 731 1344 214 777 1531 295 833 1717 375 888 1876 478 938 2035 581 988 2166 694 1030 2297 807 1072
0.4 801 105 738 1051 166 785 1300 227 832 1493 309 881 1685 392 930 1847 496 977 2009 600 1023 2128 707 1064 2247 813 1105
0.5 725 118 817 991 179 850 1256 239 883 1455 324 926 1653 408 970 1814 516 1019 1974 623 1068 2091 720 1099 2207 817 1130
0.6 - - - - - - - - - - - - - - - - - - 1212 251 931 1417 337 969 1621 423 1008 1784 531 1053 1947 638 1098 2057 729 1126 2166 820 1154
0.7 - - - - - - - - - - - - - - - - - - 1169 263 975 1380 350 1010 1590 437 1045 1756 544 1086 1921 651 1127 2014 736 1157 2106 821 1187
0.8 - - - - - - - - - - - - - - - - - - 1114 277 1027 1331 366 1059 1547 454 1091 1717 560 1126 1886 666 1161 1976 743 1184 2066 821 1207
0.9 - - - - - - - - - - - - - - - - - - 1062 290 1077 1283 380 1106 1504 470 1135 1669 575 1170 1833 680 1204 1919 749 1220 2005 817 1236
1.0 - - - - - - - - - - - - - - - - - - 1007 304 1127 1240 392 1147 1473 481 1166 1627 584 1202 1780 687 1238 1853 748 1253 1925 809 1269
1.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1429 497 1211 1569 590 1240 1709 683 1269 1787 741 1280 1864 799 1291
1.2 - - - - - -
Loading...