nvent LOBOY LB16-1026-G Series User manual

© 2019 nVent 87976427
Rev. K P/N 10-1008-05
Air Conditioner
LoBoY 16 ModeL
INSTRUCTION MANUAL

© 2019 nVent 87976427
- 2 -
WARRANTY AND RETURN POLICY
https://hoffman.nvent.com/en/hoffman/warranty-information
TABLE OF CONTENTS
WARRANTY AND RETURN POLICY................................................................................................................................................ 2
RECEIVING THE AIR CONDITIONER............................................................................................................................................... 3
HANDLING AND TESTING THE AIR CONDITIONER...................................................................................................................... 3
How to Read Model Numbers ....................................................................................................................................................................... 3
INSTALLATION INSTRUCTIONS..................................................................................................................................................... 4
Design Data..................................................................................................................................................................................................... 4
Dimensional Drawing ..................................................................................................................................................................................... 4
Mounting Cutout Dimensions........................................................................................................................................................................ 5
Unit Characteristics ........................................................................................................................................................................................ 5
TECHNICAL INFORMATION............................................................................................................................................................ 6
Sequence of Operation................................................................................................................................................................................... 6
Cooling..................................................................................................................................................................................................... 6
Standard and Optional Component Operation............................................................................................................................................. 6
Thermostat.............................................................................................................................................................................................. 6
Time Delay Relay..................................................................................................................................................................................... 6
Contactor................................................................................................................................................................................................. 6
Wire Diagrams................................................................................................................................................................................................. 7
MAINTENANCE................................................................................................................................................................................ 8
Compressor..................................................................................................................................................................................................... 8
Condenser and Evaporator Blower Motors .................................................................................................................................................. 8
Refrigerant Loss.............................................................................................................................................................................................. 8
SERVICE DATA ................................................................................................................................................................................. 9
LB16 Series Component List......................................................................................................................................................................... 9
Refrigerant Properties Chart (R407c) ........................................................................................................................................................... 9
TROUBLE SHOOTING ....................................................................................................................................................................10
Basic Air Conditioning Trouble Shooting Check List................................................................................................................................. 10
Symptoms and Possible Causes: ............................................................................................................................................................... 11
F-GAS INFORMATION....................................................................................................................................................................11

© 2019 nVent
87976427 - 3 -
RECEIVING THE AIR CONDITIONER
Inspect the air conditioner. Check for concealed damage that may have occurred during shipment. Look for dents,
scratches, loose assemblies, evidence of oil, etc. Damage evident upon receipt should be noted on the freight bill.
Damage should be brought to the attention of the delivering carrier -- NOT to nVent Equipment Protection -- within
15 days of delivery. Save the carton and packing material and request an inspection. Then le a claim with the
delivering carrier.
nVent Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any
way possible.
HANDLING AND TESTING THE AIR CONDITIONER
If the air conditioner has been in a horizontal position, be certain it is placed in an upright, vertical or mounting
position for a minimum of ve (5) minutes before operating.
Do not attempt to operate the air conditioner while it is horizontal
or on its side, back or front. The refrigeration compressor is lled
with lubricating oil. This will cause permanent damage to the air
conditioner and also voids the warranty.
CAUTION
TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.
Refer to the nameplate for proper electrical current requirements, and then connect the power cord to a properly
grounded power supply. Minimum circuit ampacity should be at least 125% of the amperage shown in the
design data section for the appropriate model. No other equipment should be connected to this circuit to prevent
overloading.
Operate the air conditioner for ve (5) to ten (10) minutes. No excessive noise or vibration should be evident
during this run period. The condenser blower (ambient air), the evaporator blower (enclosure air), and the
compressor should be running.
Condenser air temperatures should be warmer than normal room temperatures within a few minutes.
HOW TO READ MODEL NUMBERS
LB16 10 2 6 G015
12345
1. Identies the type/family of air conditioner and the approximate height (i.e. LB16 = LOBOY family
about 16” high).
2. This is the air conditioner’s listed capacity in BTU/Hr. at rated conditions. (i.e. 10 = 10,000 BTU/Hr.
at 125/125 F)
3. 1 = 115 Volt, 2 = 230 Volt, 4 = 460 Volt.
4. 6 = 50/60 Hz or 60 Hz only.
5. Unique set of numbers for each air conditioner which identies the accessories on a model.

© 2019 nVent 87976427
- 4 -
INSTALLATION INSTRUCTIONS
1. Inspect the air conditioner and verify correct functionality before mounting the air conditioner. See
HANDLING AND TESTING THE AIR CONDITIONER on page 3.
2. Refer to Mounting Cutout Dimensions on page 5 for proper openings of the air conditioner.
Using the mounting gasket kit provided with the unit, install gaskets to the air conditioner.
3. Mount air conditioner on enclosure taking care not to damage the mounting gasket. The
mounting gasket is the seal between the air conditioner and the enclosure. Avoid dragging the air
conditioner on the enclosure with the mounting gasket attached as this could cause rips or tears
in the gasket and risk losing the water tight seal.
4. To avoid cross-threading mounting inserts, start bolts by hand before tightening with a wrench or
ratchet driver.
5. Allow unit to remain upright for a minimum of ve (5) minutes before starting. Caution: Air
conditioner must be in upright position during operation.
6. Refer to the nameplate for electrical requirements. Wire the unit to a properly grounded power
supply. Electrical circuit should be fused with slow blow or HACR circuit breaker.
7. Some air conditioners require a remote mounted thermostat. Wire the thermostat outputs to
the appropriate terminals on the 24 VAC terminal strip (note locations on the Wire Diagrams on
page 7).
8. Set thermostat for required cabinet temperature. Refer to Sequence of Operation on page 6 for
thermostat adjustment and operation.
DESIGN DATA
Model Evaporator Air In
(°F)
Condenser
Air In
(°F)
Unit
Amps
Evaporator
Pressure
(psi)
Condenser
Pressure
(psi)
Evaporator
Delta
(°F)
Condenser
Delta
(°F)
Condenser
Subcooling
(°F)
LB16-1026-
GXXX 65-95 65-95 7.0-8.0 --- --- 18-25 --- ---
DIMENSIONAL DRAWING

© 2019 nVent
87976427 - 5 -
MOUNTING CUTOUT DIMENSIONS
CUTOUT INSTRUCTIONS (5 Ton)
NOTE: Dashed lines represent air conditioner.
UNIT CHARACTERISTICS
Part Description Model
LB16-1026-GXXX
Dimensional Data
Height (in./mm) 15.75 / 400
Width (in./mm) 19.00 / 483
Depth (in./mm) 25.20 / 640
Unit Weight (lb./kg) 140 / 64
Unit Protection Rating Type 12, 4
Cooling Data
Refrigerant R-407c
Refrigerant Charge 25 oz. / 709 g
Cooling Capacity at 95 F enclosure 95 F ambient (Btu/hr / W) 8343 / 2445
Cooling Capacity at Max Conditions (Btu/hr / W) 9038 / 2649
Maximum Ambient Temp 125 F / 52 C
Minimum Ambient Temp -40 F / -40 C
Condensate Management Hose discharge
Electrical Data
Rated Voltage (50/60 Hz) 230 V
Rated Frequency 50 / 60 Hz
Voltage Range +/- 10% of rated
Cooling Amps at Max Conditions (50/60 Hz) 12.4 / 11.0
-XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specic model numbers.

© 2019 nVent 87976427
- 6 -
TECHNICAL INFORMATION
SEQUENCE OF OPERATION
The air conditioner comes standard with one internally mounted thermostat. When the unit is plugged in, the
evaporator fan will be running.
COOLING
When the enclosure temperature is above the cooling thermostat setpoint, power is applied through
the time delay relay. After the delay time, the contactor is energized and the compressor starts. The
condenser fan will start once the compressor starts. Component specic information is listed below.
Operating the air conditioner below the minimum ambient temperature or above the maximum ambient
temperatures indicated on the nameplate voids all warranties.
The moisture that the enclosure air can contain is limited. If moisture ows from the drain tube
continuously, this can only mean that ambient air is entering the enclosure. Be aware that frequent
opening of the enclosure’s door admits humid air that the air conditioner must then dehumidify.
STANDARD AND OPTIONAL COMPONENT OPERATION
THERMOSTAT
The LB16 air conditioner uses our standard 52-6155-02 thermostat. The thermostat setpoint equals
the temperature when the air conditioner turns off. The thermostat has an adjustable differential from
setpoint until it calls for cooling; the typical differential is 5 F. An example of operation is shown below.
For cooling (75-100 F range):
Thermostat setpoint = 80 F
Cooling turns on at 85 F
Cooling turns off at 80 F
TIME DELAY RELAY
Factory set for 6 minutes (top dial at 1-10 minutes, bottom dial at 6). The purpose of the time delay relay
is to prevent short cycling of the compressor.
CONTACTOR
The contactor uses a 230V coil.

© 2019 nVent
87976427 - 7 -
WIRE DIAGRAMS

© 2019 nVent 87976427
- 8 -
MAINTENANCE
COMPRESSOR
The compressor requires no maintenance. It is hermetically sealed, properly lubricated at the factory and should
provide years of satisfactory operating service.
CONDENSER AND EVAPORATOR BLOWER MOTORS
Blower motors require no maintenance. All bearings, shafts, etc. are lubricated during manufacturing for the life
of the motor.
Operation of the air conditioner in areas containing airborne
caustics or chemicals can rapidly deteriorate lters, condenser
coils, blowers and motors, etc. Contact nVent Equipment
Protection for special recommendations.
CAUTION
REFRIGERANT LOSS
Each air conditioner is thoroughly tested prior to leaving the factory to insure against refrigeration leaks. Shipping
damage or microscopic leaks not found with sensitive electronic refrigerant leak detection equipment during
manufacture may require repair or recharging of the system. This work should only be performed by qualied
professionals, generally available through a local, reputable air conditioning repair or service company.
Should the refrigerant charge be lost, access ports on the suction and discharge sides of the compressor are
provided for recharging and/or checking suction and discharge pressures. Under no circumstances should the
access tting covers be loosened, removed or tampered with. Breaking of seals on compressor access ttings
during warranty period will void warranty on hermetic system. Recharging ports are provided for the ease and
convenience of reputable refrigeration repair service personnel for recharging the air conditioner.
Refer to the data on the nameplate that species the type of refrigerant and the charge size in ounces.
Before recharging, make sure there are no leaks and that the system has been properly
evacuated into a deep vacuum. Technician must weigh in charge according to the nameplate
specifications.

© 2019 nVent
87976427 - 9 -
SERVICE DATA
LB16 SERIES COMPONENT LIST
Part Description Part Number
Blower Motor, Condenser 10-1020-04
Blower Motor, Evaporator 10-1020-10
Capacitor, Condenser Blower 52-6083-00
Capacitor, Evaporator Blower 52-6084-05
Capacitor, Compressor, Run 52-6031-01
Time Delay Relay 10-1005-71
Coil, Condenser 16-7001-00
Coil, Evaporator 52-6121-01
Compressor 10-1026-115
Contactor, Compressor 10-1005-42
Evaporator Inlet Filter 10-1000-08
Filter/Dryer 52-6028-00
Capillary Tube 99-0640-35
Thermostat 52-6155-02
REFRIGERANT PROPERTIES CHART (R407C)
°F °C Bubble Pt Dew Point °F °C Bubble Pt Dew Point
-40 -40 2.9 4.5 60 15.6 117.7 96.8
-35 -37.2 5.2 0.7 65 18.3 128.7 106.7
-30 -34.4 7.9 1.7 70 21.1 140.2 117.2
-25 -31.7 10.7 475 23.9 152.5 128.4
-20 -28.9 13.9 6.5 80 26.7 165.5 140.4
-15 -26.1 17.3 9.3 85 29.4 179.2 153.1
-10 -23.3 21.1 12.4 90 32.2 193.6 166.5
-5 -20.6 25.2 15.8 95 35 208.8 180.8
0-17.8 29.6 19.5 100 37.8 224.9 195.8
5-15 34.4 23.6 105 40.6 241.8 211.8
10 -12.2 39.6 28 110 43.3 259.6 228.7
15 -9.4 45.2 32.7 115 46.1 278.2 246.5
20 -6.7 51.3 37.9 120 48.9 297.8 265.3
25 -3.9 57.8 43.6 125 51.7 318.3 285.2
30 -1.1 64.7 49.6 130 54.4 339.9 306.1
35 1.7 72.2 56.2 135 57.2 362.4 328.2
40 4.4 80.2 63.2 140 60 386 351.4
45 7.2 88.7 70.7 145 62.8 410.7 375.9
50 10 97.8 78.8 150 65.6 436.5 401.7
55 12.8 107.5 87.5

© 2019 nVent 87976427
- 10 -
TROUBLE SHOOTING
BASIC AIR CONDITIONING TROUBLE SHOOTING CHECK LIST
1. Check manufacturer’s nameplate located on the unit for correct power supply.
2. Turn on power to the unit. The evaporator (Enclosure or “COLD” air) fan should come on. Is there
airow?
YES, proceed to step 3.
NO, possible problem:
• Open motor winding
• Stuck fan motor
• Obstructed blades
Repair or Replace
defective part
3. Check thermostat setting and adjust thermostat to the lowest setting. This should turn on the
condenser fan and compressor. Did condenser fan and compressor come on when the thermostat
was turned on?
YES, proceed to step 4.
NO, possible problem:
• Defective thermostat Replace Part
4. Are both fans and the compressor running? If not the unit will not cool properly.
5. Check condenser (Ambient or “HOT” air) fan for airow. Is there airow?
YES, proceed to step 6.
NO, possible problem:
• Defective thermostat
• Open motor winding
• Stuck impeller motor
• Obstructed wheels/blades
Repair or Replace
defective part
6. Carefully check the compressor for operation - motor should cause slight vibration, and the outer
case of the compressor should be warm. Is the compressor showing signs of this?
YES, wait 5 minutes, then proceed to step 7.
NO, possible problem:
• Defective thermostat
• Defective capacitor
• Defective overload
• Defective relay
Repair or Replace
defective part
7. Make sure the coils are clean. Then check evaporator “air in” and “air out” temperatures. If the
temperatures are the same:
• Possible loss of refrigerant
• Possible bad valves in the
compressor
Repair or Replace
defective part
8. To check for a bad thermostat, turn power to the unit off. Remove the control box cover and place
both thermostat wires onto one terminal (replace control box cover for safety). This will activate
the switch in the thermostat. Turn the power on and if both fans and the compressor come on, the
thermostat needs to be replaced.

© 2019 nVent
87976427 - 11 -
SYMPTOMS AND POSSIBLE CAUSES:
SYMPTOM POSSIBLE CAUSE
Unit won’t cool
Clogged ns on coil(s)
Dirty lter
Impellers/fans not running
Compressor not running
Compressor runs, but has bad valves
Loss of refrigerant
Compressor tries to start but won’t run
Low line voltage at start. Should be +/-10% rated voltage.
Compressor motor stuck
Bad contactor
Bad overload switch
Bad run/start capacitor
Unit blows breakers Undersized breaker/fuse or not time delayed
Short in system
Getting water in enclosure
Drain plugged
Drain tube kinked
Enclosure not sealed (allowing humidity in)
Mounting gasket damaged
For additional technical information (i.e., amp draw, pressures, temperatures) , contact nVent
Equipment Protection at 800-896-2665.
F-GAS INFORMATION
LB161026GXXX
Refrigerant
Kühlmittel
Chłodziwo R407C
GWP 1774
Factory Charge
Füllmenge durch Hersteller
Opłata Fabryczna
709 Grams
709 Gramm
709 Gramów
CO2Equivalent
CO2Equivalent
CO2Ekwilalent
1.26 Tons
1,26 Tonnen
1,26 Tony

© 2019 nVent 87976427
Rev. K P/N 10-1008-05
P8GPV
*QHHOCP9
C[
#
PQMC/075#




P8
GPVEQO