background image

Principles of Operation (con’t)

Kooltronic Air Conditioners are required when the equipment operating temperature
must be kept near or lower than the ambient room temperature, and/or the cabinet
must be sealed from dust, fumes, oil, corrosives and other contaminants. These Air
Conditioners utilize a "Closed-Loop Cooling System" to ensure optimum performance
of the installed components.
Closed-Loop cooling seals the electronic enclosure from hostile elements in the
environment. Two separate circulation systems are employed. The internal system
cools and dehumidifies the air inside the cabinet, totally isolating the sensitive
electronics and other components from the environment. The external system uses
circulating ambient air or water to discharge the heat removed from the electronics. The
heat is dissipated from the enclosure by means of the vapor compression refrigeration
cycle. This takes place in a hermetically-sealed refrigeration system, utilizing either an
air-cooled or water-cooled condenser heat exchanger. The warm air inside the
enclosure is drawn through the evaporator coil where it is cooled, dehumidified and
returned.

Any enclosure moisture accumulated on the evaporator coil is collected in the
condensate tray and removed through the drain tube to the condensate evaporator.
Condensate evaporates in the condensate evaporator and is released to the ambient
air by the condenser impeller. 

The heat removed through the evaporator coil is transferred by the compressed refrigerant to the condenser coil. Ambient air is
then passed through the condenser coil, where it absorbs the heat and is then discharged to the environment.

This unit is equipped with a Low Temperature Thermostat to prevent the evaporator coil from freezing. In conditions of low
ambient temperature and low enclosure load, the thermostat regulates the return air temperature from 75°F to 86°F.
Temperature on the thermostat display is 5°F higher than the return temperature from the enclosure. The low
temperature thermostat set point is 80°F. The set point can be adjusted. Consult with Kooltronic if the set point
needs to be adjusted below 80°F.

The optional heater consists of a heater, a heat control thermostat and a heater limiter. The heater control thermostat is a bimetal
disk with a fixed set point of 60°F. When the entering evaporator air temperature rises above 60°F the heater shuts off, and when
the evaporator air temperature falls below 40°F the heater will engage. The heater limiter features a manual reset. This unit is
equipped with a Temperature Alarm, which has normally-closed and normally open contacts, and a set point of 115°F. This unit
is equipped with a high pressure switch. When abnormal conditions are detected, the switch shuts off the compressor. When the
Kooltronic Air Conditioner is properly sized it should operate constantly and maintain 75°F to 115°F enclosure temperature,
depending on the ambient temperatures.

CONTROL ACTION

The evaporator blower operates continuously. The compressor is cycled on and off by the action from the factory preset
programmable thermostat. A pressure switch controls the on/off action of the condenser blower.

The regulation is performed according to the temperature measured by the thermostat probe with a positive differential from the
set point: if the temperature increases and reaches set point plus differential the compressor is started and then turned off when
the temperature reaches the set point value again.

In case of fault in the thermostat probe the start and stop of the compressor are
timed through preset parameters.

The programmable thermostat is located as shown in the upper right ISO
illustration. WARNING: the programmable device is preprogrammed and set at the
factory. In the event changes are needed the following instructions can be used.

PROGRAMMABLE
THERMOSTAT

CONDENSER
AIR OUT
(TWO PLACES)

CONDENSER
AIR IN

RETURN
AIR IN

SUPPLY
AIR OUT

7

HL48LV

FRONT PANEL LED INDICATORS

- To display target set point; in programming mode it selects a parameter or confirms an operation.

(UP)

- To see the max. stored temperature; in programming mode it browses the parameter codes or increases the displayed value.

(DOWN)

- To see the min. stored temperature; in programming mode it browses the parameter codes or decreases the displayed value.

- To switch the instrument off, if onF = oFF.

- Not enabled.

(DEF)

- To start a manual defrost.

KEY COMBINATIONS

To lock and unlock the keyboard.

To return to the room temperature display.

To enter programming mode.

FRONT PANEL COMMANDS

Содержание K2A6C9HL48LV

Страница 1: ...L BE READ AND UNDERSTOOD THOROUGHLY KOOLTRONIC INC 30 Pennington Hopewell Road Pennington NJ 08534 609 466 3400 FAX 609 466 1114 www kooltronic com 900 039 77 1 19 CDR 20131 HAZARDOUS LOCATION SERIES K_A6C9HL48LV U S Pat No 9 157 670 B2 Find additional information on this model at kooltronic com or use the Technical Documents QR code below Technical Documents ...

Страница 2: ...ooting 17 18 XII Warranty 19 NOTE Wiring Schematics are available on the specific model page of the Kooltronic website I Introduction Kooltronic Hazardous Location Air Conditioners HL Series are designed to provide a cool dehumidified environment for your electronic components Our closed loop design also ensures that your components will not be exposed to hot dirty operating conditions This Manual...

Страница 3: ...inimum of 5 minutes prior to operating in order to allow the compressor oil to drain to the compressor sump area CAUTION 3 Before operating this unit all electrical wiring must be checked to assure the proper connection to the correct power source Minimum circuit ampacity should be at least 125 of the amperage found on the nameplate for the corresponding voltage Do not exceed the maximum fuse size...

Страница 4: ...ASS I DIVISION 1 GROUPS A B C AND D HAZARDOUS LOCATIONS TYPE X PURGE AND CLASS I DIVISION 2 GROUPS A B C AND D TYPE Z PURGE ENCLOSURES WHEN INSTALLED ON AN APPROVED PRESSURIZED ENCLOSURE AND CONNECTED TO PURGE PRESSURIZATION CONTROL SYSTEM PER NFPA496 ALSO SUITABLE FOR CLASS I ZONE 1 GROUPS IIA IIB PLUS HYDROGEN AND IIC AIR LEAKAGE 0 25 I W G PRESSURE CFM 0 1 INTERNAL PRESSURIZED VOLUME CU FT 2 4 ...

Страница 5: ... of combustible materials or unless all devices within have been de energized WARNING HIGH TEMPERATURE INTERNAL PARTS This Air Conditioner must not be opened unless the area atmosphere is known to be below the ignitable concentration of combustible materials or unless all devices within have been de energized for at least thirty 30 minutes WARNING FOR CLASS I ENCLOSURE After the Air Conditioner ha...

Страница 6: ...surized customer enclosure must be connected to the Purge Pressurized Control System by gas air lines in parallel The Kooltronic HL Series Air Conditioner must be powered from the pressurized customer enclosure power supply and the customer enclosure must be controlled by the Purge Pressurized Control System All electrical and electronic components in the Kooltronic HL Series Air Conditioner are l...

Страница 7: ...consists of a heater a heat control thermostat and a heater limiter The heater control thermostat is a bimetal disk with a fixed set point of 60 F When the entering evaporator air temperature rises above 60 F the heater shuts off and when the evaporator air temperature falls below 40 F the heater will engage The heater limiter features a manual reset This unit is equipped with a Temperature Alarm ...

Страница 8: ...e the new set point value push the SET key again or wait 10 seconds HOW TO CHANGE A PARAMETER VALUE To change a parameter s value operate as follows 1 Enter the Programming mode by pressing the SET plus down arrow keys for 3 seconds the C or F LED starts blinking 8 2 Select the required parameter Press the SET key to display its value 3 Use up or down arrow keys to change its value 4 Press SET to ...

Страница 9: ...ap code 7 0 65535 rEL Software release 0 rSE Real set point 0 onF on off key enabling ES PbC Kind of probe ntc Adr Serial address 1 1 247 HES Differential for energy saving 0 F 54 54 rrd Regulation restart with door open alarm y odc Compress status when open door no nPS Number of activation of pressure switch 15 0 15 did Digital input alarm delay 5 min 0 255 i1F Digital input configuration EAL i1P...

Страница 10: ...scharge ports The cool air discharged should be less than 70 F when the room temperature is between 70 F and 80 F 9 Reset the thermostat to the factory setting 80 F 10 Turn off the electrical power and disconnect the air conditioner from the power source NOTE Before shipment all Kooltronic Air Conditioners are subjected to a performance test CAUTION VIII Customer Enclosure Requirements 1 The inter...

Страница 11: ... to the enclosure The contact closure may be used with their control system having a timer function and output signal The output signal would energize a solenoid valve equipped with a fixed orifice or an adjustable needle valve within the enclosure This would provide additional pressurized air for a selected period of time typically two to three minutes The relief valve utilized on the purge press...

Страница 12: ...ar the bottom of the air conditioner 5 The customer must connect the Purge Pressurized System control line to the Swagelok fitting B400 1 OR 1 4 inch NPT The customer has a choice of two connection fittings on the unit One is for internal connection and the other is for external connection see illustration below The unused fitting must be sealed with the provided cap NOTE Some earlier models may o...

Страница 13: ... 88 225 6 1 11 28 2 1 2 68 17 3 4 70 119 4 68 17 3 36 9 1 52 13 3 6 67 169 3 6 00 152 4 94 23 9 6 00 152 4 6 00 152 4 5 62 143 0 79 20 1 6 38 161 9 6 00 152 4 4 67 119 0 MOUNTING PLAN Dimensions inches metric are for reference only and are subject to change WARM AIR RETURN FROM ENCLOSURE COOL AIR OUTLET TO ENCLOSURE 1 2 K_A6C9HL48LV ...

Страница 14: ... 1219 2 10 93 277 5 31 7 9 24 10 612 3 1 38 35 1 10 28 261 2 PRESSURE COMPENSATION TERMINAL BLOCK 65 16 4 97 24 5 32 49 825 3 PURGE PRESSURE FITTING 1 4 NPT 1 3 2 4 2 DRAIN K_A6C9HL48LV Dimensions inches metric are for reference only and are subject to change Drawings and Dimensions con t 14 FILTERED CONDENSER AIR INLET Ambient Air In CONDENSER OUTLET Warm Ambient Air Out WARM AIR RETURN FROM ENCL...

Страница 15: ...nd Class I Zone 2 Groups IIA IIB plus hydrogen and IIC Hazardous Locations when used with an approved Type Z Purge System on the electrical enclosure Temperature Classification is T 4 275 F 135 C Maintains NEMA Type 12 3R 4 4X Ratings per UL 50 Cabinets and Boxes Closed Loop Cooling Compressor Short Cycling Protector Filter Interior and Exterior Purge Connections Internal Corrosion Protection Pain...

Страница 16: ...hed under warm running water with clean side up If the accumulated dirt is oily washing in a detergent bath is recommended followed by a warm water wash as above After filter removal the exposed condenser coil must be cleaned by pressurized air or pressurized cleaning solution Dirty liquid will be removed through the condenser coil drain pan B Blowers The design life of the blowers used in all Koo...

Страница 17: ...nt controller or enclosure see below Removing Air Conditioner from Pressurized Enclosure Conform to the applicable provisions of PROCEDURE FOR PROPER PACKING AND SHIPMENT OF KOOLTRONIC AIR CONDITIONERS in this manual under Section III PRODUCT HANDLING F Removing Air Conditioner from Pressurized Enclosure Before removing a Kooltronic HL Series Air Conditioner from a pressurized enclosure it must be...

Страница 18: ...condensate Eliminate the frequency of door openings draining and loss of A C sensible cooling performance Unit overcooling Failed Thermostat Check Thermostat wire connections Evaporator Blower Condenser Replace Thermostat Blower and Compressor are running Failed Relay Replace Relay Compressor cycling more than Short circuiting of air Provide baffle in the enclosure separating A C 10 cycles per hou...

Страница 19: ... received by customer Number of parts to be returned Product description model and serial number Reason for return Action requested Contact name telephone FAX numbers and e mail address Pack unit in a suitable container for shipment preferably the original packaging if available All Air Conditioners must be returned in an upright position properly secured to a pallet Improper packaging may void wa...

Отзывы: