T-333PL - Mobile Climate Control
Contents
1. te ma E Ee AG E 2 2 2 62 Internal Part Replacement 22255 sec 3 se ache eda Reber ee 2 2 2 03 Replace Entre Valve vases todas Oise ee 2 3 27 THERMOSTATIC EXPANSION VALVE Block 325232 0043 406008 a EO ROCCO 2 3 2 74 Valve Replacement RES PRES DEE RESP RRS PREAH EATER 2 3 28 COIL FREEZE THERMOSTAT 2 3 29 HIGH PRESSURE SWITCH Optional 2 3 SERVICE PARTS 3 1 INTRODUCTION 352 3 1 CONFIGURATION IDENTIFICATION 3 1 MODEL CHART dan PCR ddr ul er idR dede 3 1 GENERAL NOTES be New oe 3 1 3 1 ESS COOLING SYSTEM 12 24V COMMON PARTS 77 62186 00 THRU 04 3 2 3 2 ESS COOLING SYSTEM 12 24V MIO CONNECTIONS 77 62186 00 AND 01 3 4 33 ESS COOLING SYSTEM 12 24V ORS CONNECTIONS 77 62186 02 03 AND 04 3 5 3 4 ESS COOLING SYSTEM HARNESS 77 62186 00 THROUGH 03 3 6 55 ESS COOLING SYSTEM HARNESS 77 62186 04 3 6 3 6 ESS COOLING SYSTEM 24V ORS CONNECTIONS MCD 77 62202. The ESS Air Cooler is an auxilary cooling component of a rooftop RF or rear mounted RM air conditioning system When the main evaporator calls for cooling the liquid line solenoid valve is opened sending a signal to open the liquid line solenoid valve on the ESS Air Cooler See Figure 2 2 Liquid refrigerant flows from the main condensing assembly through the ESS Air Cooler liquid line solenoid valve to the expansion valve TXV The thermal expansion valve reduces pressure and temperature of the liquid and meters the flow of liquid refrigerant to the Air Cooler coil to obtain maximum use of the coils heat transfer surface The low pressure low temperature liquid that flows into the Air Cooler evaporator coil tubes is colder 2012 Mobile Climate Control 2 1 T 333 Rev 06 2012 o Mobile Climate Control than the air that is circulated over the evaporator tubes by the ESS fans Heat transfer is established from the evaporator air flowing over the tubes to the refrigerant flowing inside the tubes The evaporator tubes have aluminum fins to increase heat transfer from the air to the refrigerant therefore the cooler air is circulated to the interior of the ESS The liquid line solenoid valve closes during ESS Air Cooler shutdown to prevent refrigerant flow The transfer of heat from the air to the low temperature refrigerant in the evaporator coil causes the liquid to vaporize This low temperature low pr
3. manual for procedutes f Evacuate and recharge system Refer to the Roof top RF or rear mounted RM service manual for procedutes g Connect wire leads and test operation 1 Snap Cap 5 Gasket 2 Coil Assembly 6 Piston Assembly 3 Enclosing Tube 7 Body Assembly 4 Plunger Assembly 8 Bracket Adapter Figure 2 3 Liquid Line Solenoid Valve 21 THERMOSTATIC EXPANSION VALVE Block The thermostat expansion valve is an automatic device which maintains constant superheat of the refrigerant gas leaving the evaporator regardless of suction pressure The valve functions are a automatic control of refrigerant flow to match the evaporator Air Cooler load and b prevention of liquid refrigerant entering the compressor Unless the valve is defective it seldom requires any maintenance 2012 Mobile Climate Control 2 3 T 333 Rev 06 2012 o Mobile Climate Control 2 1 1 Valve Replacement a Recover and recycle system refrigerant Refer to the Rooftop RP or rear mounted RM service manual for procedures b Remove no drip insulating tape from block valve and fitting connections c Carefully loosen all fittings connected to the block valve 4 CAUTION There may be liquid refrigerant trapped behind the block valve Slowly loosen the fittings and avoid contact with exposed skin or eyes d Remove and replace block valve lubricating the fitting threads and O rings with mineral oil before torquing
4. 3 00 3 7 3 6 ESS COOLING SYSTEM 24V ORS CONNECTIONS MCI 77 62203 00 3 8 3 7 ESS COOLING SYSTEM SUCTION TUBE ASSEMBLY FOR 77 62203 00 3 10 3 8 ESS COOLING SYSTEM LIQUID TUBE ASSEMBLY FOR 77 62203 00 3 10 3 9 ESS COOLING SYSTEM HARNESS FOR 77 62203 00 MCI 3 11 2012 Mobile Climate Control i T 333 Rev 06 2012 o Mobile Climate Control LIST OF FIGURES Figure 1 1 ESS Air Cooler amp Components i ges basis Rt Wa ts RU e AGRO NP Re Figure 1 2 Electrical Schematic ESS Air Cooler W Micromax Rooftop RF Application Figure 1 3 Electrical Schematic ESS Air Cooler W Micromax Rearmount RM55 Application Figure 1 4 Electrical Schematic ESS Air Cooler W Micromax Reatmount RM50 Application Figure 1 5 ESS With Air Cooler Installed tice ctor nee bei xd see bates se Ses uss Figure 2 1 Air Cooler Operation diced ck ue de eee keke Figure 2 2 Air Cooler Refrigerant Flow Diagram uua cedes du eoa cte oe bananes Figure 2 3 Liquid Line Solenoid Valve ves ies chev on Eis Gen eee eee ees 1 1 1 1 1 2 1 2 1 3 2 1 2 2 2 3 2012 Mobile Climate Control ii T 333 Rev 06 2012 o Mobile Climate Control SECTION 1 INSTALLATION 1 1 Introduction The MCC Rooftop ESS Energy Storage System Air Cooling Unit See Figure 1 1 is a one piece assembly consistin
5. 34 62021 01 Rivet Blind Dome Head 3 16 Dia Grip Range 250 375 2 15 38 00573 09 Filter Air 012 Thick X 8 00 X 18 20 Inches Ex 40 01184 00 5 Assembly Low Side Adapter M8 Includes C ee medo Foam Adhesive Backed Foam Adhesive Backed fu Foam Adhesive Backed eec Bushing 100 Inch Diamerer Hoe fr Las 62600500 ae Refigerant Charge Only a Panel Assembly Front 86025200 Drin Pan j Bracket Tube Connections 1 30 67 62022 00 Bracket Assembly Support EA 31 67 62020 00 Bracket Assembly Fitting Support Tube Connections 1 NM ES Bracket Asembiy Suppor gt p j i illiolioli lrn gt 2012 Mobile Climate Control 3 9 T 333 Rev 06 2012 o Mobile Climate Control 3 7 ESS COOLING SYSTEM SUCTION TUBE ASSEMBLY FOR 77 62203 00 41 42 43 Tube Assembly Suction Includes Tube Assembly Suction Bent 5 8 OD X 040 Wall Copper Fitting ORS 5 8 ODF X 1 00 14 Valve Schrader Brass 1 4 SAE Flare Includes Core Access Valve Nickel Plated Cap Seal Flare 1 4 Inch 3 8 ESS COOLING SYSTEM LIQUID TUBE ASSEMBLY
6. 62125 00 42 62125 02 42 62126 00 42 62131 03 42 62131 05 42 62131 06 42 62131 07 42 62138 00 42 62138 01 PAGE 227 3 9 3 9 3 9 3 4 3 9 3 3 3 9 3 4 3 5 3 10 3 5 3 5 3 10 3 10 3 3 3 10 3 9 3 9 3 4 3 4 3 5 3 5 3 3 3 3 3 3 3 3 3 3 3 9 3 4 3 9 3 9 3 9 3 9 3 9 3 9 2012 Mobile Climate Control Index 1 T 333 Rev 06 2012 o Mobile Climate Control PART 42 62139 00 9 56 0034 56 62299 00 56 62300 00 56 62301 00 56 62302 00 56 62321 00 56 62323 00 58 00661 04 58 04730 00 25 6 62 02444 00 62 62039 00 66U1 3882 67 62000 00 67 62002 00 67 62002 01 67 62003 00 67 62020 00 67 62021 00 67 62022 00 67 62023 00 67 63753 00 68 63572 00 68 63573 00 68 63578 00 PAGE 3 7 3 3 3 9 3 4 3 5 3 4 3 4 3 5 3 5 3 10 3 10 3 3 3 9 3 6 3 11 3 3 3 9 3 9 3 3 3 3 3 3 3 3 3 9 3 7 3 9 3 9 3 9 3 3 3 3 3 3 INDEX PART 68 63580 00 68 63600 00 68 63624 00 68 63720 00 68 63755 00 68 63759 00 1 77 62203 01 8 81 62142 00 81 62143 00 81 62157 00 81 62158 00 86 62438 00 86 62440 00 86 62440 01 86 62520 00 801 201 801 202 801 203 DD19CA061 PAGE 3 4 3 5 3 5 3 3 3 9 3 9 3 9 3 7 3 9 3 4 3 5 3 10 3 10 3 3 3 3 3 3 3 9 3 3 3 9 3 3 3 9 3 3 3 9 3 3 2012 Mobile Climate Control Index 2 T 333 Rev 06 2012 Every driver deserves the best possible vehicle cl
7. FOR 77 62203 00 Tube Assembly Liquid Includes Tube Liquid Bent 3 8 OD X 028 Wall Copper Tube Assembly Liquid Bent 3 8 OD X 028 Wall Copper Valve Solenoid Without Coil 1 2 ODF Bushing Tube Flush 1 2 ODM x 3 8 ODS 2012 Mobile Climate Control 3 10 T 333 Rev 06 2012 o Mobile Climate Control 3 9 ESS COOLING SYSTEM HARNESS FOR 77 62203 00 MCI 51 52 53 B 51 52 53 oM IU 22 62233 01 Harness ESS Coiling System Includes 1 2012 Mobile Climate Control 3 11 T 333 Rev 06 2012 o Mobile Climate Control PART 0 02 62000 00 08 62061 00 08 62075 00 1 12 00547 00 14 00150 14 14 00301 03 14 00351 00 2 22 01141 01 22 01566 01 22 01585 00SK 22 02392 00 22 02393 00 22 02394 00 22 02394 01 22 02567 02 22 02567 03 22 62233 00 22 62233 01 3 34 00655 12 34 00662 11 34 00667 61 34 00917 08 34 00917 12 34 00917 18 INDEX PAGE 3 3 3 9 3 3 3 9 3 3 3 9 3 4 3 5 3 10 3 3 3 9 3 3 3 10 3 6 3 11 3 3 3 9 3 3 3 6 3 9 3 6 3 11 3 6 3 11 3 3 3 9 3 6 3 11 3 3 3 9 3 3 3 6 3 11 3 4 3 4 3 4 3 9 3 4 3 4 PART 34 01267 20 34 06088 04 34 06088 05 34 06212 15 34 62021 01 38 00573 09 4 40 00090 04 40 00201 02 40 00491 09 40 00491 12 40 00491 15 40 01124 00 40 01184 00 40 01184 50 40 62032 01 40 62032 02 42 00243 02 42 00243 03 42 62122 00 42 62123 00 42 62124 00 42 62124 01 42
8. Mobile Climate Control T 333 Manual INSTALLATION OPERATION SERVICE amp PARTS SUPPLEMENT for Rooftop Energy Storage Systems ESS AIR COOLING UNIT 77 62186 00 THRU 04 amp 77 62203 00 T 333 REV 03 2012 2012 Mobile Climate Control o Mobile Climate Control TABLE OF CONTENTS PARAGRAPH NUMBER Page INSTALLATION 2c 2ecctaudedimindetsictauctoautater sbotgudesauietetseccaucteavendes 1 1 JnffoddoHOB 52 1 1 12 Blect cal i rs ee 1 1 1 9 Installation T p E ee 1 3 OPERATION amp SERVICE 2 1 24 OPERATION 2 1 DA Ar Circulation 2a eb bd bd b bte ibtd 2 1 2 12 Refrigerant Cycle cte EUR ese Sw tae Me ge dns 2 1 2 2 MAINTENANCE SCHEDULE 0 2 2 221 sScheduled MaititeHance n a aep aie paene tere b 2 2 23 2 2 24 EVACUATION AND DEHYDRATION 3 8555 ae de ma ea na 2 2 25 ADDING REFRIGERANT TO SYSTEM Reece ewes ee ea XR 2 2 26 SERVICING THE LIQUID LINE SOLENOID VALVE 2 2 2 6 1 Coil Replacement 555 Rr thes ks
9. O Bracket Mounting Tube Connections Painted ORS Panel Top Painted Model 77 62186 00 01 02 03 Panel Top With Notch Painted Model 77 62186 04 Es 2012 Mobile Climate Control 3 3 T 333 Rev 06 2012 o Mobile Climate Control 3 1 ESS COOLING SYSTEM 12 24V COMMON PARTS 77 62186 00 THRU 04 Continued 42 62126 00 Insulation Front Panel Assembly Black Adhesive Backed 34 62021 01 Rivet Blind Dome Head 3 16 Dia Grip Range 250 375 Screw Hex Head Captive Washer 10 32 X 50 Inch Long Screw Hex Head Captive Washer 10 32 X 3 4 Inch Long Screw Cap Hex Head 1 4 20 X 1 1 2 Inch Long SST Washer Flat 1 4 Inch SST Nut Hex Self Locking 1 4 20 SST 3 2 ESS COOLING SYSTEM 12 24V MIO CONNECTIONS 77 62186 00 AND 01 81 62142 00 Tube Assembly Liquid amp Suction MIO Fittings Includes 56 62299 00 Tube Assembly Liquid Bent 3 8 OD X 028 Wall Copper 56 62301 00 Tube Assembly Suction Bent 5 8 OD X 040 Wall Copper 40 00090 04 Reducer 1 2 ODM X 3 8 ODF Copper 40 62032 01 Fitting Swivel Nut 5 8 X 7 8 14 MIO 68 63580 00 Plate Connection Retainer Brass MIO 40 62032 02 Fitting Swivel Nut 1 2 X 3 4 16 MIO 56 62300 00 Tube Liquid Bent 1 2 OD X 035 Wall Copper Valve Solenoid Without Coil 1 2 ODF N C 2012 Mobile Climate Control 3 4 T 333 Rev 06 2012 o Mobile Climate Control 3 3 ESS COOLING SYSTEM 12 24V ORS CONNECTIONS 77 62186 02 03 AND 04
10. Solenoid Valve ESS Air Cooler ESS AIR COOLING UNIT Reference Unit 68RM55 101 11 OPEN P RISE 300 40 CLOSE P DROP 200 40 From main system K13 LEGEND K13 CLUTCH RELAY TB TERMINAL BOARD CL CLUTCH LSV LIQUID LINE SOLENOID FT FREEZE THERMOSTAT ESS AIR COOLING UNIT Figure 1 3 Electrical Schematic ESS Air Cooler W Micromax Rearmount RM55 Application 2012 Mobile Climate Control 1 2 T 333 Rev 06 2012 o Mobile Climate Control Reference Unit 68RM50 101 36 ESS COOLER OPEN T DROP A O 5 B ose OPEN P RISE CLOSE P DROP lt LEGEND LSV 1 LIQUID LINE SOLENOID RM CL CLUTCH LSV 2 ESS LIQUID LINE SOLENOID K13 CLUTCH RELAY FTS FREEZE THERMOSTAT SWITCH Figure 1 4 Electrical Schematic ESS Air Cooler W Micromax Rearmount RM50 Application 2012 Mobile Climate Control 1 3 T 333 Rev 06 2012 o Mobile Climate Control 13 Installation To install the air cooler to the ESS do the following a Remove and save six bolts 6M from the air intake of the ESS b Remove and discard the intake grill c Remove and save six bolts 6M from the ESS air outlet d Remove left side panel side opposite TXV on the Air Cooler This will allow you access the ESS bolt holes e Place the Air Cooler against the ESS and fix in place using the original 12 6M ESS bolts See Figure 1 5 f Replace Air Cooler side panel g Connect a 6 or 8 liq
11. Tube Assembly Liquid amp Suction ORS Fittings Includes Tube Assembly Liquid Bent 3 8 OD X 028 Wall Copper Tube Assembly Suction Bent 5 8 OD X 040 Wall Copper Reducer 1 2 ODM X 3 8 ODE Copper Valve Solenoid Without Coil 1 2 ODF N C Fitting ORS 3 8 X 11 16 16 6 Fitting ORS 5 8 X 1 00 14 10 Plate Connection Retainer Brass ORS Tube Liquid Bent 3 8 OD X 028 Wall Copper 48 49 2012 Mobile Climate Control 3 5 T 333 Rev 06 2012 o Mobile Climate Control 3 4 ESS COOLING SYSTEM HARNESS 77 62186 00 THROUGH 03 61 62 63 B 60 62 63 2 59 22 62233 00 Harness ESS Coiling System Includes 1 60 22 01585 005 Connector 2 Pin Black 1 22 02392 00 Connector Kit 2 Pin C1 NM 3 5 ESS COOLING SYSTEM HARNESS 71 62186 04 07 08 69 07 68 69 2 2 22 62233 01 Harness ESS Coiling System Includes 2012 Mobile Climate Control 3 6 T 333 Rev 06 2012 o Mobile Climate Control 3 6 ESS COOLING SYSTEM 24V ORS CONNECTIONS MCI 77 62203 00 REF 77 62203 00 MCI Item Part Number Desctiption 1 77 62203 01 ESS Cooling Assembly Chassis Kit Reference Only 67 62021 00 Bracket Assembly Interface Control 42 62139 00 Insulation Bracket Foam Adhesive Backed 34 01267 20 Screw Flat Head Socket M6 x 20MM Long Grade 10 9 2012 Mobile Climate Control 3 7 333 Rev 06 2012 o Mobil
12. ble in packaged quantity only PL Purchase Locally SST Stainless Steel 300 Series unless otherwise specified SV Suffix SV added to part number designates service replacement part 2012 Mobile Climate Control 3 1 T 333 Rev 06 2012 o Mobile Climate Control 3 1 ESS COOLING SYSTEM 12 24V COMMON PARTS 77 62186 00 THRU 04 NOTCH 04 ASSEMBLY ONLY 39 OR 48 LIQUID SUCTION TUBING ASSEMBLY SEE SECTION 3 2 OR 3 3 28 29 32 26 33 35 14 15 16 36 37 38 9 10 11 34 SERIAL DECAL 34 77 62186 00 01 SHOWN 59 OR 66 HARNESS SEE SECTION 3 4 OR 3 5 2012 Mobile Climate Control 3 2 333 Rev 06 2012 o Mobile Climate Control 3 1 ESS COOLING SYSTEM 12 24V COMMON PARTS 77 62186 00 THRU 04 Continued 1 manan Sd Panel Foam Adhesive asked 5s 0066104 Bushing Paste 100 Inch Diameter le Thermostat Freeze Up Non Adjustable 12 24 VDC Coil Assembly Evaporator EM 6 Includes Body Valve Schrader Brass 1 4 SAE Flare Includes Core Valve Schrader Nickel Plated Cap Seal Flare1 4 Inch ee sor Ie Bracke Mount Air Piten Paned f 20 67 62000 00 Bracket Assembly Mounting Solenoid Valve White Coil 12 VDC 15 Watts Model 77 62186 00 amp 02 LA Coil 24 VDC 15 Watts Model 77 62186 01 03 8 04 Za EE CE 22156601 Terminal Female 1820 AWG Bracket Mounting Tube Connections Painted MI
13. e Climate Control 3 6 ESS COOLING SYSTEM 24V ORS CONNECTIONS MCI 77 62203 00 Continued 10 29 31 16 3 20 22 23 10 13 30 5 26 56 6 7 8 9 21 34 14 19 27 Decal SN 2 14 17 18 28 32 Warranty 1 0 REF 77 62203 01 2012 Mobile Climate Control 3 8 T 333 Rev 06 2012 o Mobile Climate Control 3 6 ESS COOLING SYSTEM 24V ORS CONNECTIONS MCI 77 62203 00 Continued ee 3 Decal MCC Oval 288s 3 exo Assembly Evaporator FSS Cooler 74717129647 Up Non Adjusabie Valve Thema Expansion Bock Type terminal Female 1820 7 Ls asa cape ss 0 340091708 Screw Hex Head Captive Washer 10 32 X 50 Inch Long 10 n 300r Nut Hex ORS 0 695 Tube x 100 14 Thread Zine Lu p ums TE Nut Hex ORS 0 035 Tube x 11 7716 16 Thread Zinc ES 340001215 Washer Phin pe A 1
14. essure vapor passes through the suction line and returns to the compressor where the cycle is repeated Liquid Line Solenoid Liquid From Unit um gt Suction To Compressor Mounting Bracket Fitting Connections mamam LIQUID i LIQUID VAPOR Figure 2 2 Air Cooler Refrigerant Flow Diagram 2 0 MAINTENANCE SCHEDULE Normal ot routine maintenance on the ESS Air Cooler will normally be performed in conjunction with the main rooftop RF or rear mounted RM maintenance schedules Refer to the approptiate operation and service manual for these maintenance schedules 22 1 Scheduled Maintenance a Check inlet air filters weekly Clean or replace as necessary b Check operation of the liquid line solenoid It must operate in conjunction with the rooftop or rear mount evaporator liquid line solenoid Refer to paragraph 2 6 Check liquid amp suction line connections for leaks Check and clean Air Cooler coil as necessary 2 3 REFRIGERANT LEAK CHECK A refrigerant leak check should always be performed after the system has been opened to replace or repair a component To check for leaks in the refrigeration system perform the following procedure a Ensure liquid line solenoid valve is open Solenoid valve will need to be powered from the closest 12VDC or 24VDC soutce Refer to the Roof
15. g of an evaporator coil expansion valve liquid line solenoid valve suction line and a freeze thermostat The ESS Air Cooling Unit is used in conjunction with a MCC Rooftop RF or Rear Mounted RM main air conditioning system and a Micromax Controller The purpose of the air cooler is to aid in keeping the hybrid bus battery pack ESS cool The ESS has its own fans that provide airflow ventilation system The MCC ESS Air Cooler is integrated into that ventilation system Figure 1 1 ESS Air Cooler amp Components 12 Electrical Movement of refrigerant through the MCC Air Cooling Unit is controlled by the electrical system of the main ait conditioning system See Figure 1 2 Figure 1 3 or Figure 1 4 The internal components of the ESS along with the MCC Air Cooling Unit must have sufficient air movement to keep the ESS temperature under 30 C 86 F Note The Air Cooler will not operate unless the main evaporator assembly is in the cool mode 2012 Mobile Climate Control T 333 Rev 06 2012 o Mobile Climate Control Reference Unit 68RF353 101 7 OPEN P RISE 300 410 CLOSE P DROP 200 40 From main system A B T Compressor Liquid Solenoid Valve In Evaporator RF LEGEND K13 CLUTCH RELAY TB TERMINAL BOARD CL CILUTCH LSV LIQUID LINE SOLENOID FT FREEZE THERMOSTAT Figure 1 2 Electrical Schematic ESS Air Cooler W Micromax Rooftop RF Application Liquid
16. imate with MCC products MCC provides exceptional performance in mobile climate comfort Mobile Climate Control www mcc hvac com Member of MCC Group Certified ISO 9001 and ISO 1 4001 Specifications subject to change without notice MCC is a registered trademark 2012 Mobile Climate Control T 333 Rev 03 2012
17. s with the Micromax Controller The HPS will open when the refrigerant pressure rises to 300 Lbs 10 Ibs The HPS will close when the pressure drops to 200Lbs 10 Ibs 2012 Mobile Climate Control T 333 Rev 06 2012 o Mobile Climate Control SECTION 3 SERVICE PARTS INTRODUCTION This section provides identification of service replacement parts for the Mobile Climate Control Energy Supply System ESS Air Cooling Units listed in the following Model Chart CONFIGURATION IDENTIFICATION Unit identification information is provided on a plate decal located on the side of the ESS This plate provides the unit model number and the unit serial number The model number identifies the unit configuration and differences in detailed parts MODEL CHART ESS AIR COOLER 77 62186 04 24 VDC 15 Watts O Ring Seal ORS 77 62203 00 24 VDC 15 Watts O Ring Seal ORS GENERAL NOTES To find replacement parts determine major group in which replacement parts are located and turn to the appropriate page for the illustrated breakdown of the replacement parts The following letter designations are used to classify parts throughout this list Parts can be obtained by ordering from the following website 77 62186 03 24 VDC 15 Watts O Ring Seal ORS www mcc hvac com A R As Required N S Not Shown on Illustration NSS Not Sold Separately Order next higher assembly or kit Suffix P added to part number means part is availa
18. to the required specification of 30 35 Ft Lb NOTE Do not attempt to adjust the replacement block valve The valves are preset at the fac tory e Insulate block valve with no drip insulating tape f Leak check evacuate and charge system with covered refrigerant Refer to the Rooftop RF or rear mounted RM service manual for proce dures g Check operation of the system Adjust refrigerant charge if needed Refer to the Rooftop RF or rear mounted RM service manual for procedures 2 8 FREEZE THERMOSTAT Freeze Stat Freeze Thermostats are used to prevent ice from forming on the Air Cooler evaporator coil which is an indication that liquid is getting back to the compressor The Air Cooler Freeze Thermostat is wired in series with the liquid line solenoid valve If the Freeze Thermostat reaches the preset temperature it will open shutting off power to the liquid line solenoid which will also open stopping the flow of liquid refrigerant The Freeze Thermostat will cut out at 30 5 F 0 8 C 1 5 F and it will cut in at 45 F 7 2 C 1 5 F Preset at the factory Non Adjustable In order to accurately sense the temperature of the refrigerant within the evaporator tubes the probe of the Freeze Thermostat must always be inserted within the evaporator coil 2 9 HIGH PRESSURE SWITCH Optional The ESS Air Cooler Rooftop System has a normally closed High Pressure Switch wired in serie
19. top RF or rear mounted RM service manual for procedures 24 EVACUATION AND DEHYDRATION The presence of moisture in a refrigeration system can have many undesirable effects The most common are copper plating acid sludge formation freezing up of metering devices by free water and formation of acids resulting in metal corrosion a Evacuate and dehydrate only after pressure leak test Refer to the Rooftop RF or rear mounted RM service manual for procedures 2 5 ADDING REFRIGERANT SYSTEM Refer to the Rooftop RF or rear mounted RM service manual for procedures 2 6 SERVICING THE LIQUID LINE SOLENOID VALVE The Liquid line solenoid valve Figure 2 3 is very similar to a heat valve It requires no maintenance unless a malfunction to the internal parts or coil occurs This may be caused by foreign material such as dirt scale or sludge in the refrigeration system or improper voltage to the coil There are only three possible valve malfunctions coil burnout failure to open or failure to close Coil burnout may be caused by the following 1 Improper voltage 2012 Mobile Climate Control 2 2 T 333 Rev 06 2012 o Mobile Climate Control 2 Continuous over voltage more than 10 or un der voltage of more than 15 3 Incomplete magnet circuit due to the omission of the coil hosing or plunger 4 Mechanical interface with movement of plunger which may be caused by a deformed enclosing
20. tube Failure to open may be caused by the following 1 Coil burned out or an open circuit to coil connec tions 2 Improper voltage 3 Defective plunger or deformed valve body assem bly Failure to close may be caused by the following 1 Defective plunger or deformed valve body assem bly 2 Foreign material in the valve 2 6 1 Coil Replacement a Itis not necessary to remove the refrigerant charge from the system b Disconnect Air Cooler from Rooftop or Rear Mounted evaporator assembly Disconnect wire leads to coil d Remove coil retaining clip and nameplate e Lift failed coil from enclosing tube and replace f Connect wire leads connect to main evaporator and test operation 2 6 2 Internal Part Replacement a Disconnect system from bus battery b Recover and recycle system refrigerant Refer to the Rooftop RF or rear mounted RM service manual for procedures c Assemble valve and leak check d Evacuate and recharge system Refer to the Roof top RF or rear mounted RM service manual for procedures 2 5 3 Replace Entire Valve a Recover and recycle system refrigerant Refer to the Rooftop RF or rear mounted RM service manual for procedures b Remove valve assembly from bracket c Disconnect wite leads to coil d Disassemble new valve to protect internal parts and solder to lines e Assemble and leak check valve Refer to the Roof top RF or rear mounted RM service
21. uid hose MIO or ORS de pending on application from the main evaporator assembly to the Air Cooler TXV h Connect a 10 suction hose MIO or ORS de pending on application from the Air Cooler TXV to the system compressor i Connect wiring from the Liquid Line Solenoid Valve on the main evaporator assembly to the Air Cooler plug TOP VIEW 7 Y Y Y WY MI WY Y WY lt Figure 1 5 ESS With Air Cooler Installed 2012 Mobile Climate Control T 333 Rev 06 2012 Q Mobile Climate Control SECTION 2 OPERATION amp SERVICE WARNING BE SURE TO OBSERVE ALL WARNINGS AND CAUTIONS LISTED IN THE THIS MANUAL BEFORE PERFORMING MAINTENANCE ON THE HVAC SYSTEM AND THE AIR COOLER WARNING DO NOT ATTEMPT ANY SERVICE TO THE ENERGY STORAGE SYSTEM THE ESS CONTAINS HIGH VOLTAGE AND SERIOUS INJURIES COULD OCCUR THE CAR RIER TRANSPORT AIR COOLER IS THE ONLY ITEM THAT IS SERVICABLE 2 1 OPERATION 2 1 1 Air Circulation The Air Cooler has no fan or blower assemblies Circulation is achieved from the fans located within the Energy Storage System ESS Ambient air is pulled across the evaporator coil and cooled Cool air is then circulated throughout the ESS The cool air is mixed with the heat given off from the ESS The warm air is ejected from the ESS and returned to the ambient RETURN TO AMBIENT lt lt AMBIENT AIR Quum Figure 2 1 Air Cooler Operation 2 1 2 Refrigerant Cycle
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