Delta-T RZ-02A Series User'S & Technical Manual Download Page 18 | Manualshive

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4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472

URL:

www.iscenclosurecooling.com

● Email:

[email protected]

SP-ENG-210-100-06 Rev 1.9 18 |

P a g e

connection and disconnection. It is recommended to use stubby gauges with low loss fittings to
minimize refrigerant loss.

Field Serviceable Parts

ISC carefully designs and selects components with the maximum life expectancy. Due to OEM
manufacturing tolerances, poor unit maintenance or extreme operating conditions, components may
fail before their maximum life expectancy. The table below lists parts that are serviceable in the field by
an Air Conditioner Technician.

Part Description

ISC Part #

Digital Controller

52111-3

Low Pressure Switch

38151-1-3

High Pressure Switch

38176-1-3

Condenser Fan Cut-In Pressure Switch

38001-1-3

Temperature Probe

52126-1

Thermal Expansion Value TXV

RZ-02A 120VAC Only = 32006-1, RZ-02A 230VAC/RZ-03A/RZ-04A =
32002-1

Compressor

RZ-02A = 31520-1 for 120VAC/480VAC, 31570-1 for 230VAC
RZ-03A/RZ-04A = 31525-1 for 120VAC/480VAC, 31570-1 for 230VAC

Compressor Thermal Overload

RZ-02A = 31520-2 for 120VAC/480VAC, 31570-2 for 230VAC
RZ-03A/RZ-04A = 31525-2 for 120VAC/480VAC, 31570-2 for 230VAC

Gasket Installation Kit

71401-N234

Evaporator Fan

41005-1-1 for 120VAC/480VAC
41005-2-1 for 230VAC

Condenser Fan

41025-1-1 for 120VAC/480VAC
41025-2-1 for 230VAC

Filter Media

44202 (12 pack)

Capacitor

54001-1

Safety Information

Unit is carefully designed to restrict access to movable parts to minimize any potential injury. This Air
Conditioner has been tested by UL to meet the safety requirements of the UL484 specification. When
working with the DELTA-T Air Conditioner always makes sure shroud is installed. Verify proper
voltage is applied to unit as specified in the UL label of the Air Conditioner. In the event of a field
service repair, power down unit and disconnect power from unit. It is always recommended to use a
licensed Air Conditioner Technician for internal diagnostics and repairs issues.

Contact ISC technical support for further details on opening the unit and troubleshooting tips.

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Summary of Contents for RZ-02A Series

Page 1: ...User Technical Manual RZ 02A RZ 03A RZ 04A Series for Class I Division 2 Hazardous Locations Rev 1 9 ...

Page 2: ...re 1 6 06 20 19 B Slotnick Updated preliminary testing instructions compressor protection default setting 1 7 08 20 19 B Slotnick Updated preventative maintenance warranty information 1 8 01 02 20 B Slotnick Updated field serviceable parts 1 9 06 03 20 B Slotnick Updated System Faults Alarm Signals Warranty Statement of Confidentiality The Manual and other materials contain proprietary information...

Page 3: ...ng the Air Conditioner 5 Unit Label 5 Operation 5 Preliminary Testing 8 Mounting the Air Conditioner 9 Unit Specifications 10 Options 12 System Faults 14 Digital Temperature Controller Programming 14 Preventative Maintenance 17 Field Serviceable Parts 18 Safety Information 18 Troubleshooting Guide 19 Physical Dimensions 22 Electrical Schematic 24 Warranty Information 25 Return Material Authorizati...

Page 4: ...ing the Equipment DELTA T air conditioning equipment is designed manufactured and packed to prevent damage from normal handling shock and vibration during shipment It is necessary to inspect your equipment upon receipt to ensure that there is no visual or hidden damage Upon receipt of the equipment ensure that it is always top side up as indicated by THIS SIDE UP labels This ensures that the compr...

Page 5: ... the template below and keep this information in a safe place for warranty and ordering parts To prevent damage to equipment electrical panel and wiring and to prevent personal injury assure that the power source is compatible with the equipment before operating When recharging refrigeration type and amount must be the same as shown on the unit label or air conditioner will not operate properly or...

Page 6: ...IS APPARATUS IS SUITABLE FOR USE IN CLASS I DIVISION 2 GROUPS A B C AND D HAZARDOUS LOCATIONS OR UNCLASSIFIED LOCATIONS ONLY WARNING EXPLOSION HAZARD DO NOT DISCONNECT EQUIPMENT WHILE THE CIRCUIT IS LIVE OR UNLESS THE AREA IS KNOW TO BE FREE OF IGNITABLE CONCENTRATIONS AVERTISSEMENT RISQUE D EXPLOSION AVANT DE DECONNECTER L EQUIPEMENT COUPER LE COURANT OU S ASSURER QUE L EMPLACEMENT EST DESIGNE NO...

Page 7: ...rols Co Enclosure Manufacture of Material LG Chemical Ltd Designation of Material Type GP 2306F Epoxy Manufacture of Material Rhenatech GbmH Designation of Material Type EP VERGUSSMASSE 5315 Generic Name of Plastic Material epoxy resin Sealed Device Fan Motor Thermal Protector Type S01 manufactured by Thermik Geraetebau GMBH Insulation Cap Manufacture of Material E I Dupont de Nemours and Co Inc D...

Page 8: ... in 3 minutes If desired change the cooling set point Refer to Digital Temperature Controller Programming section on this manual for details on changing the set point Factory default settings should be satisfactory however you may want to adjust heat cooling and alarm set points for your specific application The condenser fan is controlled by the refrigerant high heat pressure and will turn on lat...

Page 9: ... inside the enclosure use the fasteners supplied to attach the air conditioner to the enclosure Screw all fasteners hand tight Then torque to 96 in lbs These fasteners should be checked periodically to ensure that they have not become loose due to vibration The air conditioner is provided with a power cord or a power terminal block Ensure that the power supplied is compatible with the air conditio...

Page 10: ... Recommended Fuse Selection Amps KVA Rating Refrigerant Type Refrigerant Amount ounces Low High Unit Pressures psi RZ 02A 126 103 5 126 5 16 42 3 76 2 8 Amp Class CC CCMR Time Delay 0 5 R422d 13 25 118 335 RZ 02A 236 207 253 13 41 3 07 2 6 Amp Class CC CCMR Time Delay 0 7 R422d 9 75 88 348 RZ 02A 486 414 506 4 11 0 94 2 2 Amp Class CC CCMR Time Delay 0 5 R422d 13 25 118 335 HACR Type Circuit Break...

Page 11: ... 4 000 BTUH Maximum Ambient 122 F Temperature Classification T4 Unit Weight 115VAC 66lbs 230VAC 72lbs 460VAC 99lbs Model Operating Voltage Range Volts Inrush Current Start Up Current Amps Loading Current Running Current Amps SCCR Short Circuit Current Rating Amps Recommended Fuse Selection Amps KVA Rating Refrigerant Type Refrigerant Amount ounces Low High Unit Pressures psi RZ 04A 126 103 5 126 5...

Page 12: ...ntact will activate to notify you that there is a problem in achieving your cooling set point Default Settings 105 F Dry Contact High Temperature Alarm Set Point 2 F Recovery Differential 3min Temperature Alarm Delay At the default settings the contact initial condition is normally open When the unit is powered on and the temperature exceeds 105 F for a period longer than 3 minutes the contact wil...

Page 13: ... Controller Programming section for details on all default settings Adjustable Temperature Probe The adjustable temperature probe provides you with a 12 temperature probe that can be installed anywhere in your enclosure This allows you to have the flexibility to monitor and maintain the temperature at any specific location of your enclosure Remote Controller When having our Programmable Digital Co...

Page 14: ...inute time delay A thermal overload protects the compressor against faults In the event that the snowflake status LED is on but is not flashing and the compressor is not running an internal fault may have occurred Refer to the Troubleshooting Guide in this manual Digital Temperature Controller Programming For the end user this section will provide all the necessary information to view and change a...

Page 15: ...ue 4 Use the UP or DOWN arrow key to change its value 5 Press SET to store the new value and move to the following parameter To exit Press SET UP arrow keys or wait 15 seconds without pressing a key Note The set value is stored even when the procedure is exited by waiting for the time out to expire HOW TO LOCK THE KEYPAD 1 Press and hold the UP and DOWN arrow keys simultaneously for more than 3 se...

Page 16: ...larm Only 2 HA2 Condenser High Temperature Alarm P2 164 F for 3 minutes Compressor turned Off by pressure switch if temperature continues to rise 2 LA2 Condenser Low Temperature Alarm P2 50 F for 3 minutes No Action Alarm Only 2 CA Evaporator Coil Alarm Low Pressure for 2 minutes Compressor Off 2 noP Invalid Probe Selected Low Evaporator Coil No Action Alarm Only 2Note When both Heater and Dry Con...

Page 17: ...ce DO NOT operate the air conditioner without the air filter Such operation will allow the condenser coil to become dirty and lose efficiency causing overheating and diminished cooling capacity Periodically remove dust from the components inside the condenser section of the air conditioner with a compressed air blower Very dirty condensing coils must be back flush cleaned using proper commercial c...

Page 18: ...for 120VAC 480VAC 31570 1 for 230VAC RZ 03A RZ 04A 31525 1 for 120VAC 480VAC 31570 1 for 230VAC Compressor Thermal Overload RZ 02A 31520 2 for 120VAC 480VAC 31570 2 for 230VAC RZ 03A RZ 04A 31525 2 for 120VAC 480VAC 31570 2 for 230VAC Gasket Installation Kit 71401 N234 Evaporator Fan 41005 1 1 for 120VAC 480VAC 41005 2 1 for 230VAC Condenser Fan 41025 1 1 for 120VAC 480VAC 41025 2 1 for 230VAC Fil...

Page 19: ...ower Verify input power meets voltage requirements as shown in the UL label YES If problem is still present contact technical support Unit Overheats Insufficient Cooling Is Filter Clean NO Clean Replace Filter YES Are Condenser Evaporator Fans ON NO Check for Faulty Fan replace YES Is Condenser Coil dirty YES Clean Coil NO NO Is Evaporator Coil Frozen Iced YES Potential Bad Evaporator Fan check fo...

Page 20: ...Fan on YES NO Is there voltage to compressor Use meter3 Check for faulty evaporator fan3 Measure Temperature at Evaporator Verify Heat Load Requirements Is unit capacity adequate for internal head load Possible low refrigerant Check for error code CA LA HA LA2 HA2 P1 or P2 NO Check contactor circuit Does it have power 3 NO YES Refer to Alarm Signals in Digital Temperature Controller Programming Se...

Page 21: ...controller CA YES NO Check Low Pressure Switch Connections and Verify Pressure switch is closed Use meter 3 P1 or P2 NO YES Check probe connections potential faulty probe LA LA2 HA HA2 YES Refer to Alarm Signals in Digital Temperature Controller Programming Section Fuse Circuit Protection Nuisance Trip Is fuse opening as soon as unit turns on NO YES Check incoming power supply and connections for ...

Page 22: ... Physical Dimensions Water overflow excessive Check drain is it plugged YES NO Clean condensate pan and drain add 1 tbsp bleach to upper pan monthly to kill mold Is Air Conditioner sealed against enclosure properly tightly sealed and door closed YES Contact Customer Service NO Ensure air tight seal between air conditioner and enclosure Make sure door is closed ...

Page 23: ...4421 Tradition Trail Plano Texas 75093 972 964 2700 800 836 7472 URL www iscenclosurecooling com Email iscinfo iscsales com SP ENG 210 100 06 Rev 1 9 23 P a g e THIS PAGE IS INTENTIONALLY LEFT BLANK ...

Page 24: ...P ENG 210 100 06 Rev 1 9 24 P a g e Electrical Schematics System Schematic Digital Controller Schematic Note Schematics apply to all voltages optional accessories wiring not provided in this document If you require electrical schematic with options contact our technical support and provide your model number Controller 1 3 4 5 ...

Page 25: ...t at the ISC factory in Dallas Texas Use of equipment for other than its designed purpose or operating conditions Operation in harsh oily corrosive or other abnormal environmental conditions without the proper filtration sealing protective coatings and or weather protection or cosmetic corrosion that does not affect operation Damage to hermetic system resulting from continuous operation with dirty...

Page 26: ...nd contact info email phone number and address Shipping method Pack unit in a suitable packing for shipment preferably the original packaging if available If suitable packing is not available arrange for packaging to be shipped to you Air Conditioners must be returned in an upright position properly secured to a pallet Tip unit to empty water from the evaporator and boil off pans Clearly mark the ...

Page 27: ...ly channels facing UP 4 Starting from the left connect the wires by inserting them into the lower receptacles located on the front of connector in the following order NOTE If using stranded wires it may be difficult to insert into the receptacles without releasing the spring tension as described below in the removal instructions The wires can be tinned or pin terminals as shown above or pin ferrul...

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