nvent LB14 Series User manual
© 2018 nVent 89056971
Rev. C P/N 10-1008-160
Internal rack-Mount ac
lB14
INSTRUCTION MANUAL
© 2018 nVent 89056971
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NOTE: Some of the information in this manual may not apply if a special unit was ordered. If
additional drawings for a special unit are necessary, they have been inserted. Contact nVent if
further information is required.
WARRANTY AND RETURN POLICY
Visit hoffman.nVent.com/warranty-information
DESIGN DATA
Model Voltage Hz. Full Load Amps Phase BTU/Hr. Max °F Amb.
Temp Net lb.
LB140715XXX 115 50/60* 14.0 15800 125 140
LB140716XXX 115 60 14.0 17000 125 135
LB140725XXX 230 50 8.0 17000 125 135
LB140726XXX 230 60 7.5 17000 125 135
* Units wired for 50 Hz operation when shipped. To change to 60 Hz operation, consult wiring diagram. (One quick disconnect terminal change)
NOTES:
1. Gasket kit for mounting to enclosure is included.
2. Service cord terminated with appropriate plug.
3. Condensate from enclosure drains to condensate evaporator pan of unit, where it is evaporated
into the ambient airstream.
4. -XXX will be replaced with three digits designating all options desired.
TABLE OF CONTENTS
Warranty and Return Policy............................................................................................................................................................. 2
Design Data..................................................................................................................................................................................................... 2
Components List ............................................................................................................................................................................................ 3
Replacement Parts......................................................................................................................................................................................... 3
INSTALLATION INSTRUCTION ....................................................................................................................................................... 4
DIMENSION DRAWING .................................................................................................................................................................... 4
MAINTENANCE................................................................................................................................................................................ 4
CUTOUT DIMENSIONS .................................................................................................................................................................... 4
WIRING SCHEMATIC ....................................................................................................................................................................... 5
TROUBLE SHOOTING ...................................................................................................................................................................... 6
© 2018 nVent
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COMPONENTS LIST
Component Description Part No.
1Condenser Coil 14-1001-02
2Filter dryer, refrigerant 52-6028-00
VCompressor see table
4Hot gas bypass valve 52-6027-00
5Evaporator Coil see table
6Inlet Filter, reusable 10-1000-14
7Evaporator Blower see table
8Condenser Blower see table
9Transformer see table
10 Compressor Overload see table
11 Capacitor, Compressor 52-6031-01
Options:
12 Temp controller 52-6155-00
13 Malfunction Switch 52-6104-00
14 Suppressor 10-1004-03
REPLACEMENT PARTS
Compressor Evaporator
Coil
Evaporator
Blower
Condenser
Blower Transformer
Compressor
Thermal
Overload
LB140715XXX 10-1016-08 14-1002-00 30-4019-01M 52-6034-00 10-1006-71 10-1007-03
LB140716XXX 10-1016-08 14-1002-00 30-4019-01M 52-6034-00 10-1007-03
LB140725XXX 10-1025-08 14-1002-00 30-4019-02M 52-6025-00 10-1007-08
LB140726XXX 10-1026-08 14-1002-00 30-4019-02M 52-6025-00 10-1007-11
FRONT VIEW TOP VIEW
© 2018 nVent 89056971
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INSTALLATION INSTRUCTION
1. Inspect air conditioner
2. Slide rails must be used to support rear portion of the air conditioner. For rail location dimensions
and mounting opening cutout dimensions, refer to on page 5. NOTE: The air conditioner
must be mounted level +/- 1° in all directions to ensure proper drainage of condensate from the
condensate evaporator.
3. Seal around the enclosure cutout openings with the adhesive-backed gasket tape shipped with the
air conditioner. The gasket may be applied to either the enclosure or the air condition.
4. Remove and discard plastic plug from outlet of condensate drain tube. The drain tube must
be routed to the exterior of the enclosure. NOTE: Be sure that no portion of the drain system is
submerged or elevated above the exit point of the air conditioner. Also, the external drain line
MUST NOT form a trap at any point in the line. A trap is formed when the end of the drain tube is
submerged in a collection bucket, or when any portion of the drain line rises above the level of
another portion of the drain line. This is true even if the rise in the line is below the level of the exit
point of the air conditioner. It is recommended that the drain line slope downward continuously
from the exit of the air conditioner at a minimum rate 1° per foot of linear run.
5. Mount air conditioner in enclosure and allow to remain in upright position for at least ve minutes
before starting.
6. Refer to the nameplate for electrical current requirements. Connect the power cord to a properly
grounded power supply.
7. Unit may be equipped with an optional automatic temperature controller that is preset at the
factory for your convenience and should not require adjustment. If adjustment is required for
operation, refer to Components List on page 3.
DIMENSION DRAWING
CONDENSATE
OVERFLOW
EXHAUST AIR
FLOW
AMBIENT
AIR OUT
COOL AIR
OUT
AMBIENT
AIR IN
ENCLOSUIRE
AIR IN
TOP VIEW
DETAIL “A”
SEE DETAIL “A”
FRONT VIEW
SIDE VIEW
BOTTOM VIEW
SERVICE CORD 6
FOOT STANDARD INCLUDING
.125 INCH
SCREW
HEADS
MAINTENANCE
The LOBOY 14 series air conditioner is designed to be maintenance free, with the exception of the condenser
air inlet lter. To ensure reliable continuous operation, the inlet lter inside the front of the LOBOY 14 should be
removed and cleaned or replaced periodically.
Clean by flushing the lter with warm water and allow it to dry thoroughly. Recoat the lter with RP Super Filter
Coat adhesive or the equivalent. Reinstall cleaned or new lter.
CUTOUT DIMENSIONS
Cutout Notes:
1. Entire weitht of air conditioner is not
intended to be supported by the
mounting anges. Slide rails should be
provided.
2. Cutout dimensions for standard
product only.
© 2018 nVent
89056971 - 5 -
MAINTENANCE
The LOBOY 14 series air conditioner is designed to be maintenance free, with the exception of the condenser
air inlet lter. To ensure reliable continuous operation, the inlet lter inside the front of the LOBOY 14 should be
removed and cleaned or replaced periodically.
Clean by flushing the lter with warm water and allow it to dry thoroughly. Recoat the lter with RP Super Filter
Coat adhesive or the equivalent. Reinstall cleaned or new lter.
CUTOUT DIMENSIONS
Cutout Notes:
1. Entire weitht of air conditioner is not
intended to be supported by the
mounting anges. Slide rails should be
provided.
2. Cutout dimensions for standard
product only.
© 2018 nVent 89056971
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WIRING SCHEMATIC
Note: For voltage, hertz and options not shown in this manual, refer to the wiring diagram
attached to the unit.
FUSE (S)
(OPTIONAL) FUSE (S)
(OPTIONAL)
EVAPORATOR
BLOWER EVAPORATOR
BLOWER
SUPPRESSOR
(OPTIONAL) SUPPRESSOR
(OPTIONAL)
THERMOSTAT
(OPTIONAL) THERMOSTAT
(OPTIONAL)
CONDENSER
BLOWER CONDENSER
BLOWER
COMPRESSOR (PSC) COMPRESSOR
(PSC)
WIRING SCHEMATIC WIRING SCHEMATIC
TRANSFORMER
STANDARD 115 VOLD, 50 HERTZ
CAPACITOR CAPACITOR
LINE LINE
© 2018 nVent
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TROUBLE SHOOTING
Problem Cause Solution
Too hot in enclosure
Clogged lter or condenser coil Clean or replace lter; clean condenser
coil
Improperly adjusted temperature control Adjust temperature control
Cooling capacity is too small Contact McLean representative to
select and install unit sized properly for
application
Too cool in enclosure
Improperly adjusted temperature control Adjust temperature control
Cooling capacity is too large Contact McLean representative to
select and install unit sized properly for
application
Unit turns on and off too often
Clogged lter or condenser coil Clean or replace lter; clean condenser
coil
Cooling capacity is too large Contact McLean representative to
select and install unit sized properly for
application
Unit will not operate at all Lack of power to unit Check power cord, be sure power source
matches unit requirements (see name
plate)
Fan operating but unit not
cooling
High pressure in compressor Wait at least one minute before
restarting; clean lter and coil
Improperly adjusted temperature control Adjust temperature control
Continuous flow from
condensate drain tube Ambient air leaking into enclosure Check enclosure seals
If these problems persist, contact nVent at 800-896-2665.
© 2018 nVent 89056971
Rev. C P/N 10-1008-160
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