Lennox LCM Series User manual

Page 1
100025
LCM SERIES
Service Literature
13 to 25 ton
45.7 to 88 kW
Revised 08/2021
LCM156U through 300U
The LCM156H, 180, 210, 240 and 300 units are configure to
order units (CTO) with a wide selection of factory installed
options.
Cooling capacities range from 13 to 25 tons (45.7 to 88 kW).
LCM156 and 180 utilize three compressors and four con
denser fans, while LCM210, 240 and 300 utilize four com
pressors and six condenser fans.
Optional electric heat is factory- or field-installed. Electric
heat operates in single or multiple stages depending on the
kW input size. 15kW to 60 kW heat sections are available
for the LCM156 and 180 units and 15 kW to 90 kW heat sec
tions are available for the LCM210, 240, 300.
Multi-Stage Air Volume MSAV®blower option is available.
The VFD-driven blower will operate at lower speeds when
demand is low and increase to higher speeds when demand
is high.
Variable speed VAV system is available as an option which
enables supply duct static measurement to control blower
CFM and discharge air temperature to control cooling
stages.
All LCM units are designed to accept any of several differ
ent energy management thermostat control systems with
minimum field wiring. Factory- or field-provided control op
tions connect to the unit through Smartwiretconnectors.
When "plugged in" the controls become an integral part of
the unit wiring.
The CORE Control System is designed to accelerate
equipment install and service. Standard with all Model L™
rooftop units, control system integrates key technologies
that lower installation costs, drive system efficiency, and
protect your investments.
The CORE Unit Controller is a microprocessor-based con
troller that provides flexible control of all unit functions.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are sub
ject to change. Procedures outlined in this manual are pre
sented as a recommendation only and do not supersede or
replace local or state codes.
If the unit must be lifted for service, rig unit by attaching four
cables to the holes located in the unit base rail (two holes at
each corner). Refer to the installation instructions for the proper
rigging technique.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person
al injury or loss of life. Installation and service must
be performed by a qualified installer or service
agency.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon
nect switch(es). Unit may have multiple
power supplies.
Table of Contents
Options / Accessories Page 2.....................
Specifications Page 6............................
Blower Data Page 9.............................
Electrical / Electric Heat Data Page 12..............
Electric Heat Capacities Page 17...................
Unit Parts Arrangement Page 18...................
I-Unit Components Page 18.......................
II-Charging Page 33..............................
III-Start Up - Operation Page 35....................
IV-System Service Checks Page 35................
V-Maintenance Page 35..........................
VI-Accessories Page 36...........................
VII-Hot Gas Re-Heat Page 40......................
VIII-Staged Blower Page 44.......................
IX- VAV System Page 46.........................
X-Wiring and Operation Sequence Page 48..........

Page 2
OPTIONS / ACCESSORIES
Item Description Catalog
Number
Unit Model No
156 180 210 240 300
COOLING SYSTEM
Condensate Drain Trap PVC 22H54 OX OX OX OX OX
Copper 76W27 XXXXX
Corrosion Protection Factory O O O O O
 21Z07 OX OX OX OX OX
Refrigerant Type R-410A O O O O O
™ Factory O O O O O
BLOWER - SUPPLY AIR
Blower Option
 Factory O O O O O
 Factory O O O O O
 Factory O O O O O
Motors 󰀩 Factory O
󰀩 Factory O O O
󰀩 Factory O O O O O
󰀩 Factory O O O O
󰀩 Factory O O
Drive Kits


 Factory O O O
 Factory O O O
 Factory O O O O O
 Factory O O O O O
 Factory O O O O O
 Factory O O O O
 Factory O O O O
 Factory O O O O
 Factory O O
 Factory O O
 Factory O O O O O
CABINET
 13T12 XXXXX
CONTROLS
 21Z10 OX OX OX OX OX


®® 54W27 OX OX OX OX OX
Novar® Factory O O O O O
L Connection® - - - X X X X X
 53W68 OX OX OX OX OX
 21Z08 OX OX OX OX OX
 83W40 OX OX OX OX OX
 83W41 OX OX OX OX OX






OPTIONS / ACCESSORIES
Item Description Catalog
Number
Unit Model No
156 180 210 240 300
INDOOR AIR QUALITY
Air Filters
®󰀩

 54W67 OX OX OX OX OX
 52W40 OX OX OX OX OX
 21U42 OX OX OX OX OX


 44N61 XXXXX
Indoor Air Quality (CO) Sensors
󰀨 77N39 XXXXX
󰀨 87N53 XXXXX
 87N52 XXXXX
 87N54 XXXXX
CO 85L43 XXXXX
CO2sensors
87N53 or 77N39
90N43 XXXXX
Needlepoint Bipolar Ionization (NPBI)
 21U37 OX OX OX
21U38 OX
21U39 OX
UVC Germicidal Light Kit
1® 21A94 OX OX OX OX OX
  10H20 XXXXX
ELECTRICAL
  Factory O O O O O
 Factory O O O O O
 Factory O O O O O


 54W85 OX OX OX OX OX
 54W86 OX OX OX OX OX
 54W87 OX OX OX OX OX
 Factory O O O O O
  74M70 OX OX OX OX OX
 Factory O O O O O
 10C89 XXXXX
1

2






Page 4
OPTIONS / ACCESSORIES
Item Description Catalog
Number
Unit Model No
156 180 210 240 300
ELECTRIC HEAT
  22H66 OX OX OX OX OX
 22H67 OX OX OX OX OX
  22H68 OX
 22H69 OX
 22H70 OX OX OX OX
 22H71 OX OX OX OX
  22H72 OX
 22H73 OX
 22H74 OX OX OX OX
 22H75 OX OX OX OX
  22H76 OX
 22H77 OX
 22H78 OX OX OX OX
 22H79 OX OX OX OX
  22H80 OX OX OX
 22H81 OX OX OX
ECONOMIZER




22J18 OX OX OX OX OX
Economizer Controls
󰀨 Order 2 21Z09 OX OX OX OX OX
  Factory O O O O O
 21Z09 OX OX OX OX OX
  Factory O O O O O
 13J77 XXXXX
 13J76 XXXXX
Barometric Relief Dampers With Exhaust Hood (required with economizer)
 54W78 OX OX OX OX OX
 16K99 XXXXX
OUTDOOR AIR
Outdoor Air Dampers With Outdoor Air Hood
 22J27 OX OX OX OX OX
 13U05 OX OX OX OX OX
¹ POWER EXHAUST (DOWNFLOW APPLICATIONS ONLY)
  22H90 OX OX OX OX OX
460V 22H91 OX OX OX OX OX
HUMIDITROL™+ HOT GAS REHEAT OPTION - SZVAV MODELS ONLY
 Factory O O O O O






OPTIONS / ACCESSORIES
Item Description Catalog
Number
Unit Model No
156 180 210 240 300
ROOF CURBS

 11F58 XXXXX
 11F59 XXXXX
 11F60 XXXXX
 11F61 XXXXX
Adjustable Pitch Curb
 43W26 XXXXX
Standard Roof Curbs, Horizontal - Requires Horizontal Return Air Panel Kit
 11T89 XXXX
 11T90 X
 11T96 XXXX
 11T97 X
Insulation Kit For Standard Horizontal Roof Curbs
 73K32 XXXX
 73K33 X
 73K34 XXXX
 73K35 X
Horizontal Return Air Panel Kit
 87M00 XXXXX
CEILING DIFFUSERS
  13K63 X X
 13K64 XXX
  13K58 X X
 13K59 XXX
  12X68 X X
 12X70 XXX
1and





Page 6
SPECIFICATIONS 13 TON
General Data Nominal Tonnage 13 Ton 13 Ton
Model Number LCM156U4M LCM156U4V
󰀩 Ultra-High Ultra-High
Blower Type 


VAV


Cooling
Performance
  
1  
1  
  
1  
1  
Refrigerant
Charge
Refrigerant Type R-410A R-410A
   
  
  
   - - -
  - - -
  - - -
Electric Heating Options Available 
Compressor Type (number) 

Outdoor Coils   
  
 2 2
 20 20
Outdoor Coil
Fans
  
  
  
  
  
  
Indoor Coils   
  
  
 14 14
  
 
2Indoor
Blower
and
Drive
Selection
 
 
 2 hp
Kit 1
Kit 2
3 hp
Kit 1
Kit 2
5 hp
Kit 3
Kit 4
Kit 5
  
Filters  
 
Electrical characteristics 

1
2





SPECIFICATIONS 15 TON | 17.5 TON
General Data Nominal Tonnage 15 Ton 15 Ton 17.5 Ton 17.5 Ton
Model Number LCM180U4M LCM180U4V LCM210U4M LCM210U4V
󰀩 Ultra-High Ultra-High Ultra-High Ultra-High
Blower Type 


VAV





VAV


Cooling
Performance
    
1    
1    
    
1    
1    
Refrigerant
Charge
Refrigerant Type R-410A R-410A R-410A R-410A
     
    
    
 - - - - - -  
   - - -  - - -
  - - -  - - -
  - - -  - - -
 - - - - - -  - - -
Electric Heating Options Available  
Compressor Type (number) 



Outdoor Coils
(Fin/Tube)
    
    
 2222
 20 20 20 20
Outdoor Coil
Fans
    
    
    
    
    
    
Indoor Coils     
    
    
 14 14 14 14
    
 
2Indoor
Blower
and
Drive
Selection
 
 
 3 hp
Kit 1
Kit 2
5 hp
Kit 3
Kit 4
Kit 5
7.5 hp
Kit 6
Kit 7
Kit 8
 
Filters  
 
Electrical characteristics 

1
2




Page 8
SPECIFICATIONS 20 TON | 25 TON
General Data Nominal Tonnage 20 Ton 20 Ton 25 Ton 25 Ton
Model Number LCM240U4M LCM240U4V LCM300U4M LCM300U4V
󰀩 Ultra-High Ultra-High Ultra-High Ultra-High
Blower Type 


VAV





VAV


Cooling
Performance
    
1    
1 6000 6000  
    
1    
1    
Refrigerant
Charge
Refrigerant Type R-410A R-410A R-410A R-410A
     
    
    
    
   - - -  - - -
  - - -  - - -
  - - -  - - -
  - - -  - - -
Electric Heat Options Available 
Compressor Type (number) 

Outdoor Coils
(Fin/Tube)
    
    
 22 
 20 20 20 20
Outdoor Coil
Fans
    
    
    
    
    
    
Indoor Coils     
    
 4444
 14 14 14 14
    
 
2Indoor
Blower
and
Drive
Selection
 
 
 5 hp
Kit 3
Kit 4
Kit 5
7.5 hp
Kit 6
Kit 7
Kit 8
10 hp
Kit 7
Kit 10
Kit 11
 
Filters  
 
Electrical characteristics 

1
2





BLOWER DATA
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE FOR ALL UNITS ADD:   󰀨    MINIMUM AIR VOLUME REQUIRED FOR USE WITH OPTIONAL ELECTRIC HEAT  
Air Volume
cfm
TOTAL STATIC PRESSURE - Inches Water Gauge (Pa)
0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 2.60
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
     600  680    820  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     610          - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     620      840        - - - - - - - - - - - - - - - - - - - - - - - -
                 1010  1060  1110  - - - - - - - - - - - -
4000                 1020      1160                         1120    1210 
         800          1080       
     660    810        1040      1180   
 480          880          1140     
     680          1000    1100       
               1010  1060  1110    1200  1240 
         840            1160     
6000                   1120           640      860        1080      1220                   1040    1140                 880                                       1200  1240     600                  1160                     1020          1260                   1080    1180        8000 640    800        1040    1140               810  880        1100      1240  1280                 1060  1110  1160                         1120                         1080      1220             860      1040    1140          - - - - - -
             1100      1240    - - - - - - - - - - - -
   820        1060  1110  1160        - - - - - - - - - - - -
             1120      1260  - - - - - - - - - - - - - - - - - -
           1080    1180    - - - - - - - - - - - - - - - - - - - - - - - -
   860      1040          - - - - - - - - - - - - - - - - - - - - - - - -
       1000        1200  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 820      1010        - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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FACTORY INSTALLED OPTIONS/FIELD INSTALLED ACCESSORY AIR RESISTANCE
Air Volume
cfm
Wet Indoor Coil
Humiditrol™+
Reheat Coil
Electric
Heat Economizer Filters
Horizontal
Roof Curb
156
180
210
240
300
156 thru
240 300
in. w.g. in. w.g. in. w.g. in. w.g. in. w.g. MERV 8 MERV 13 MERV 16 in. w.g. in. w.g.
    - - - - - -     -
    - - - - - -     -
    - - - - - -     
    - - - - - -     
    - - - - - -     
4000    - - - - - -     
    - - - - - -     
    - - - - - -     
    - - - - - -     
    - - - - - -     
    - - - - - -     
    - - - - - -     
    - - - - - -     
6000     - - -     
          
          
          
          
          
          
8000          
          
          
          
          
          
          
BLOWER DATA
FACTORY INSTALLED BELT DRIVE KIT SPECIFICATIONS
󰀩 Nominal
hp
Maximum
hp
Drive Kit Number RPM Range
 2 1
 2 2
   1
   2
    
   4
    
   6
    
   8
 10   
 10  10 
 10  11 



