Krack LH14A-36 Installation Manual

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LH – Low Hite Series Unit Coolers (E104282_B)

TABLE OF CONTENTS

1 RECEIPT OF EQUIPMENT.............................................................................................................. 2

1.1 INSPECTION................................................................................................................................. 2

1.2 LOSS OF GAS HOLDING CHARGE........................................................................................... 2

2 UNIT INFORMATION AND DIMENSIONS................................................................................... 2

2.1 MODELS COVERED.................................................................................................................... 2

2.2 UNIT DIMENSIONS..................................................................................................................... 3

3 UNIT LOCATION AND MOUNTING.............................................................................................. 4

3.1 UNIT LOCATION......................................................................................................................... 4

3.2 MOUNTING .................................................................................................................................. 4

4 PIPING INSTALLATION................................................................................................................... 4

4.1 DRAIN LINE ................................................................................................................................. 4

4.2 REFRIGERATION PIPING........................................................................................................... 5

4.3 EVACUATION AND LEAK TEST.............................................................................................. 5

4.4 REFRIGERANT DISTRIBUTOR NOZZLES............................................................................... 5

4.5 EXPANSION VALVE................................................................................................................... 8

5 ELECTRICAL...................................................................................................................................... 8

5.1 FIELD WIRING............................................................................................................................. 8

5.2 ELECTRICAL DATA.................................................................................................................... 9

5.3 AIR DEFROST SEQUENCE OF OPERATION........................................................................... 9

5.4 ELECTRIC DEFROST SEQUENCE OF OPERATION............................................................. 10

6 START UP .......................................................................................................................................... 13

6.1 PRE-STARTUP............................................................................................................................ 13

6.2 OPERATION CHECKOUT......................................................................................................... 13

7 REPLACEMENT PARTS LIST....................................................................................................... 14

8 PREVENTATIVE MAINTENANCE............................................................................................... 14

9 TROUBLESHOOTING CHART...................................................................................................... 15

CHARTS

T

ABLE

1 UNIT DIMENSIONS................................................................................................................. 3

T

ABLE

2 SUCTION CONNECTION........................................................................................................ 5

ABLE

3 LH AIR DEFROST NOZZLES ................................................................................................. 6

T

ABLE

4 LH ELECTRIC DEFROST NOZZLES..................................................................................... 6

T
T

ABLE

5 LH - SERIES - AIR DEFROST................................................................................................. 7

ABLE

6 LH SERIES - ELECTRIC DEFROST....................................................................................... 8

T

ABLE

7 REFRIGERANT CHARGE AT 25% LIQUID IN COIL.......................................................... 8

T
T

ABLE

8 LH MOTOR AMPS................................................................................................................... 9

ABLE

9 LH HEATER AMPS.................................................................................................................. 9

T

ABLE

10 PART REPLACEMENT LIST................................................................................................ 14

T
T

ABLE

11 TROUBLESHOOTING CHART............................................................................................ 15

FIGURES

F

IGURE

1 UNIT DIMENSIONS............................................................................................................... 3

F

IGURE

2 AIR DEFROST WIRING………………………………………………………………….....10

F

IGURE

3 ELECTRICAL DEFROST WIRING 208-230/1/60 .............................................................. 11

IGURE

F

4 MULIPLE UNIT COOLER WIRING................................................................................... 12

LH – Low Hite Series Unit Coolers (E104282_B)

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1 RECEIPT OF EQUIPMENT

1.1 INSPECTION

All equipment should be carefully checked for damage or shortages as soon as it is received.
Each shipment should be carefully checked against the bill of lading. If any damage or shortage
is evident, a notation must be made on the delivery receipt before it is signed and a claim should
then be filed against the freight carrier.

1.2 LOSS OF GAS HOLDING CHARGE

Each unit cooler is leak tested, evacuated to remove moisture and then shipped with a gas holding
charge. Absence of this charge may indicate a leak has developed in transit. The system should
not be charged with refrigerant until it is verified that there is no leak or the source of the leak is
located.

2 UNIT INFORMATION AND DIMENSIONS

2.1 MODELS COVERED

LH Series Low Hite Unit Coolers.

The LH series are designed for medium and low temperature applications for +35°F (1.7°C) to

-20°F (-28.9°C). LH unit coolers offer dual air discharge with a compact design ideal for low
clearance walk-in applications.

The LH series has air and electric defrost options. The LH series is designed to be install flush
mount to the ceiling.

LH – Low Hite Series Unit Coolers (E104282_B)

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2.2 UNIT DIMENSIONS

Figure 1

Table 1 UNIT DIMENSIONS

Unit Size LENGTH WIDTH HEIGHT NO. OF MTG.

HOLES
LH-1
LH-2
LH-3
LH-4

32.875 26.063 9.250 4

54.875 26.063 9.250 6

76.875 26.063 9.250 6

98.875 26.063 9.250 10

LH – Low Hite Series Unit Coolers (E104282_B)

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3 UNIT LOCATION AND MOUNTING

3.1 UNIT LOCATION

Unit coolers must be located to provide good air circulation to all areas of the cooler. The unit
cooler should be positioned to allow for even airflow on both sides of the coil. Light fixtures,
shelving and product boxes must be located so that they do not block the air intake or air
discharge from the unit cooler.

IMPORTANT:
The coil face must be located a minimum of 12” from walls.

3.2 MOUNTING

The unit cooler should be suspended with 3/8” diameter hanger rods or flush mounted against the
ceiling using 3/8” minimum lag screws with flat washers. Rods should have double nuts on the
top and bottom. Adequate support must be provided to hold the weight of the unit.

The unit must be level in all directions to insure proper drainage of the condensate. Where N.S.F.
requirements must be met, unit cooler must be flush and sealed to ceiling.

4 PIPING INSTALLATION

4.1 DRAIN LINE

The drain line should be as short and as steeply pitched as possible with a minimum of ¼” drop
per running foot. A drain line trap should be installed to prevent warm moist air from migrating
through the drain line. Where multiple units are installed and share a common drain line but are
defrosted independently from one another, each unit should have its own trap before it enters the
common drain line.

If the temperature surrounding the drain line and trap is below freezing (32°) it must be wrapped
with a drain line heater and insulation. Be sure to also wrap the drain pan coupling. The drain
line heater must be energized continuously. Be sure to follow the manufacturer’s
recommendation when installing the drain line heat tape.

A union at the drain connection in the drain pan is recommended for ease of installation and
future servicing. The union should be located as close to the drain pan as possible. Use two
wrenches when tightening to prevent the drain fitting from twisting and damaging the unit.

Long runs of drain line, i.e. more than a few feet should be supported by hangers to avoid damage
to the drain pan.

For Food Service installations – seal any joint between unit cooler and cooler wall with a sealant
Listed by the National Sanitation Foundation.

LH – Low Hite Series Unit Coolers (E104282_B)

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