Setup/Installation/Operation of an Environmental Control Unit (ECU) U-09F01

Overview Characteristics Set-Up and Installation Operations

Characteristics of the ECU Design Features The ECU is a package system designed to operate in a portable field capacity Ducting Built-in Control box Remote controller

Characteristics of the ECU Specifications of the ¾ Ton ECU (B0074) Provides 9,000 BTU cooling capacity Provides 3,400 BTU heating capacity The ECU operates using 120VAC, 1 Phase, 50/60Hz power Dimensions are 16.00” High, 23.75” Wide, 26.67” Deep and weighs 187 pounds Refrigerant Charge: 1 lbs 14 oz of R-22

Characteristics of the ECU Specifications of the 1.5 Ton ECU (B0003) Provides 18,000 BTU cooling capacity Provides 7,000 or 14,000 BTU heating capacity The ECU operates using 208VAC, 3 Phase, 50/60Hz power Refrigerant Charge: 3 lbs 2 oz of R-22 Manufacturer- Nordic Air, INC., Geneva, Ohio

Characteristics of the ECU Specifications of the 3 Ton ECU (B0014) Provides 36,000 BTU cooling capacity Provides 31,000 BTU heating capacity The ECU operates using 208VAC, 3 Phase, 50/60Hz power Refrigerant Charge: 5 lbs 9 oz of R-22 Manufacturer- Nordic Air, INC., Geneva, Ohio

Characteristics of the ECU Specifications of the 5 Ton ECU (B0008) Provides 60,000 BTU cooling capacity Provides 37,000 BTU heating capacity The ECU operates using 208VAC, 3 Phase, 50/60Hz power Refrigerant Charge: 9 lbs 8 oz of R-22 Manufacturer- Nordic Air, INC., Geneva, Ohio

Characteristics of the ECU Specifications of the Integrated Trailer-ECU-Generator (ITEG) (B0018) The Integrated Trailer-ECU-Generator (ITEG) is an integrated HMMWV towable ECU generator combo

Characteristics of the ECU Specifications of the 10 Ton ECU (B0010) Provides 120,000 BTU cooling capacity Provides 47,000 BTU heating capacity The ECU operates using 208VAC, 3 Phase, 50/60Hz power supplied by the generator Refrigerant Charge: 10 lbs of R-22 Manufacturer- Nordic Air, INC., Geneva, Ohio

Characteristics of the ECU Specifications of the Generator Provides 22kW of electrical power The generator is equipped with 208VAC, 3 Phase, 60Hz, 60A power supply system and two 120V, 3 phase, 15A utility outputs

Characteristics of the ECU Electrical Components Circuit Breakers The ECUs is wired with two circuit breakers, main and control breakers, that are opened when it’s rated current flow is exceeded

Characteristics of the ECU Electrical Components Phase Monitor This component ensures that all three phases of power are entering in the correct order and uninterrupted

Characteristics of the ECU Electrical Components Selector Switch 1 Used to select the operating mode needed for current conditions

Characteristics of the ECU Electrical Components Selector Switch 2 The remote gives the user the capability to control the desired temperature from within the confined space

Characteristics of the ECU Electrical Components Thermostat A control device that responds to the surrounding air temperatures of the confined space

Characteristics of the ECU Electrical Components Condenser Fan Cycling Switch Cycles the condenser motor to low speed to allow for low ambient temperature operation

Characteristics of the ECU Electrical Components Time Delay Relay 1 Prevents compressor from short cycling Compressor will not turn back on for two minutes

Characteristics of the ECU Electrical Components Time Delay Relay 2 Allows the ECU to start and pressurize in low ambient conditions

Characteristics of the ECU Electrical Components Fan Motors Are used to rotate the evaporator and condenser fans blades at the specified RPM

Characteristics of the ECU Electrical Components Main Heating Elements When electrical current is fed into the heating elements it meets resistance and heat is created

Characteristics of the ECU Mechanical Components Compressor The type of compressor used in the ECUs is a scroll type compressor

Characteristics of the ECU Mechanical Components Discharge Service Port Used to add or remove refrigerant

Characteristics of the ECU Mechanical Components Condenser Coil Turns high pressure, high temperature vapor into a high pressure high

Characteristics of the ECU Filter Drier Filters the impurities and absorbs moisture from liquid refrigerant. Sight Glass Used to monitor the refrigerant charge. Thermal Expansion Valve Serves two purposes, it separates the high side from the low side and it also meters the flow of refrigerant to the evaporator.

Characteristics of the ECU Mechanical Components Evaporator Turns low temperature, low pressure liquid refrigerant into low pressure, low temperature super heated vapor

Characteristics of the ECU Protection Features High Pressure Cutout Switch Opens the circuit to the compressor relay if the pressure rises above a predetermined threshold

Characteristics of the ECU Protection Features Low Pressure Cutout Switch Opens the circuit to the compressor relay if the pressure falls below a predetermined threshold

Characteristics of the ECU Pressure Relief Valve Will discharge refrigerant if the internal pressures rises above a certain threshold Heater Safety System Two high limit trip switches set to break if electric heater compartment temperature rises above 140°F

Set-up and Installation of the ECU Unit Setup The ECU should be set in a level location, not be on an incline greater than 10° in any direction The ECU is should be set in a location relative to the shelter to allow the ducts to lay straight UNCLASSIFIED

Set-up and Installation of the ECU Gear Be sure to remove all gear stowed in the storage compartment that is located in the condenser section The storage compartment is designed to accommodate Two 10’ flexible ducts (16” compressed) Remote with 50’ cord Technical Manual 50’ Power Cord Replace and secure storage compartment cover

Set-up and Installation of the ECU Duct Installation Remove and roll up canvas covers Loosen straps and expand flexible duct Attach one end of the duct to the ECU Route the free end of the duct to the shelter

Set-up and Installation of the ECU Cable Installation First, attach the power cable to the ECU Then route the other end to the 208VAC 50/60Hz power source and attach it according to the color code in the wiring diagram Attach the remote to the ECU and route it into the shelter

Set-up and Installation of the ECU Other Preparations Be sure that the condensate drain is free of restrictions Remove the protective canvass covers that are located over the evaporator and condenser coils and condenser fan discharge

Operating the ECU Three operating modes Fan Cool Heat The thermostat controls the operation of the unit This controls the cooling process of the ECU

Operating the ECU Operating Modes Fan Cool Heat EVAPORATOR FAN STARTS

Operating the ECU Thermostat Bypass The bypass circuit allows the unit to run continuously even after the thermostat set point has been reached

Operating the ECU Starting the Unit Before connecting any power source do a 360° Connect the external power supply to power receptacle Place the circuit breakers in the ON position Select the operating mode Fan Cool Heat Adjust thermostat to desired setting

Operating the ECU Shutdown Procedures Emergency Shutdown Procedures Place the Selector Switch in the OFF position Ensure the fan and compressor stop Emergency Shutdown Procedures Place the main circuit breaker in the OFF position Disconnect the power cord from the main power source to interrupt incoming power Disconnect the power from the ECU

Summary Characteristics Set-Up and Installation Operations

Setup/Installation/Operation of an Environmental Control Unit (ECU) U-09F01