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WARNING: READ SAFE OPERATION RULES AND

MANUAL CAREFULLY

INSTALLATION OPERATION and MAINTENANCE MANUAL

High Efficiency Packaged Models DC Series B, Air Conditioning

Systems, Model Sizes 036 Thru 420

No Heat Recovery Cabinet

Extended Heat Recovery Cabinet

TABLE OF CONTENTS

Safety Labeling and Signal Words...........2
General Description ..................................3

Unpacking, Inspection ........................3
Design Certification..............................3
Codes & Ordinances ............................3

Installation..............................................3- 6
Unit

Location, Clearances ...................3

Curb

Installation ...................................3

Rigging...................................................4
Electrical ................................................4
Ductwork ...............................................5
Condensate

Piping ...............................5

Gas Piping and Venting ...................5- 6

Cooling System Options .......................6- 8
Hot

Gas

Bypass ....................................6

Head

Pressure Control.........................6

Variable

Speed Control ........................6

Adjustable High and Low Pressure ....7

Hot Water Heat Recovery.................7, 8

Mechanical Adjustments ....................9, 10
Evaporator

Blower Fan ..................9, 10

Electrical System Options ......................10
Air

Flow

Switch...................................10

Clogged Filter Indicator .......................... 10
Convenience Outlet ............................ 10
Exhaust

Fan

Interlock ........................ 10

Power

Through

the Curb ................... 10

Firestat................................................. 10
Sure-Trip

.......................................... 10

DDC

controls....................................... 10

Sequence of Operation ........................... 11
Heating,

Steam/Hydronic ................... 11

Gas

Heat .............................................. 11

Electric

Heat ........................................ 11

Energy

Conservation Wheel .............. 12

Trouble Shooting Guides...................13-18

General Refrigeration Circuit .......13-16

Varispeed™ Condenser Control ....... 15

Hot Gas Bypass Regulator ................ 16

Gas

Furnace ........................................ 17

R410A

Содержание B

Страница 1: ...sate Piping 5 Gas Piping and Venting 5 6 Cooling System Options 6 8 Hot Gas Bypass 6 Head Pressure Control 6 Variable Speed Control 6 Adjustable High and Low Pressure 7 Hot Water Heat Recovery 7 8 Mechanical Adjustments 9 10 Evaporator Blower Fan 9 10 Electrical System Options 10 Air Flow Switch 10 Clogged Filter Indicator 10 Convenience Outlet 10 Exhaust Fan Interlock 10 Power Through the Curb 10...

Страница 2: ...e anualmente sus equipos y realice el mantenimiento siempre que sea necesario usando exclusivamente piezas de repuesto de ADDISON Información adicional A través de los distribuidores de Addison está disponible la información sobre aplicaciones guías detalladas sobre diseño de sistemas e instalación y funcionamiento de los productos Por favor contacte con nosotros si necesita más información o si r...

Страница 3: ...Product Labeling Signal words are used in combination with colors and or pictures on product labels Following are examples of product labels with explanations of the colors used WARNING Electric Shock Hazard Turn Off All Power Before Servicing DANGER Fire Hazard Use copper wire only Failure to observe could result in property damage bodily injury or death WARNING Cuts and Abrasion Hazard Wear glov...

Страница 4: ...vice end and clearance at this point should be maintained A 36 clearance must be allowed for access to the compressor and electrical panel A 24 clearance must be maintained for the air inlet to the condenser coil s Do not locate the unit under an overhang that will short circuit hot air to the coil intakes When installed at ground level the unit should be mounted on a level concrete slab which sho...

Страница 5: ...Connections Power wiring should be connected to the main power terminal block located within the unit main control section Power wiring connections on units with factory disconnects should be made at the line side of the disconnect switch Low voltage wiring connections are made to the remote mounted controller or time clock DO NOT TAMPER WITH FACTORY WIRING Contact your local representative or the...

Страница 6: ... or metal be provided to prevent any possible damage to the roof If condensate is to be piped into the building drainage system the drain line must penetrate the roof external to the unit Refer to local codes for additional requirements CAUTION Units with high internal and external static pressure drops will require a deeper trap Use the graph and table in Figure 2 GAS PIPING AND VENTING For DC un...

Страница 7: ... discharge pressure will permit stable operation in ambients down to 32F The operating pressure switch is adjustable to match customer needs it is factory set to re energize the fans when discharge pressure drops to 295 psig and energize them when pressure increases to 430 psig Variable Speed Control The VARISPEED Fan Control System controls the compressor discharge pressure The speed control modu...

Страница 8: ... 0psig 150 psig and is factory set to open at 60 psig and close at 35psig The high pressure switch is adjustable between 200 psig And 610psig and factory set to open at 600psig and to close at 550 psig MECHANICAL ADJUSTMENTS SET FAN RPM All evaporator motor sheaves are set when tested and shipped from the factory Actual rpm must be set and verified with a tachometer Refer to the following Blower P...

Страница 9: ...off easily 7 Remove the belt Do NOT pry off belt 8 Loosen set screw s on the outer half of the adjustable pulley 9 The unit has one of two different types of adjustable pulleys 10 Remove key if unit has a keyway type pulley 11 To set the blower for a desired CFM L s first turn the outer half of the adjustable pulley clockwise until it meets the inner half of the pulley 12 Turn the outer half of th...

Страница 10: ...a sleeve can be installed in the compressor section to bring power wiring inside the curb preventing a separate roof penetration The sleeve must be sealed after wiring is completed with a suitable mastic to prevent water from entering the space Firestat This control mounted in the return air section de energizes the unit when return air reaches 135 F It is a manual reset control Sure Trip This con...

Страница 11: ...ermistor The Electronic solid state control center measures the sensor s change in resistance and sends a varying DC current to the Modulator Regulator valve to adjust the gas input as required 5 The flame sensor proves the presence of the pilot flame generating a DC current of 0 2 microamp or greater to the ignition control The ignition control s internal switch action then de energizes the spark...

Страница 12: ...ance Bearings Small ECW s smaller than ECW666 are provided with no maintenance inboard bearings These bearings should require no maintenance during the life of the equipment Larger ECW s come equipped with an external flanged bearing which should be greased annually Use a petroleum based lubricant Drive Motor The drive motors should require no maintenance Replacement motors may be purchased from n...

Страница 13: ...dome temperature of the compressor 1 Check crankcase sightglass add oil to bring level to midway in sightglass 2 Check oil pump 3 Check oil failure control for calibration 4 Allow compressor to cool for two hours if compressor is hot Recheck for open circuit 5 Check run capacitor for compressor and fan motor 6 Check subcooling 7 Check for low oil level 7 Check discharge and liquid line pressures c...

Страница 14: ...usted expansion valve 4 Check superheat and adjust TXV 5 Dirty filter 5 Check filter and evaporator coil 6 Too little air flow or low entering air temperature 6 Check airflow and entering air wet bulb conditions 7 Restriction in suction or liquid line 7 Check refrigerant circuit for restriction 1 Insufficient refrigerant charge 1 Check subcooling check for leak 2 Defective or improperly adjusted e...

Страница 15: ...r motor not running N Supply air temperature too high O Supply air temperature P Liquid line too hot R Suction line frosting Varispeed Condenser Head Pressure Control SYMPTOM POSSIBLE CAUSE REMEDY 1 Input pressure is below operating range 1 No problem normal operation 2 No 24 volt control voltage 2 Check for 24 V AC at control 3 No input pressure to control 3 Check alignment of capillary fitting S...

Страница 16: ...al equalizer passage 5 Worn or eroded regulator seat A Erratic pressure control E Regulator fails to close D Regulator will not provide pressure control C Regulator hunting chattering large fluctuations in controlled pressures B Regulator leakage 4 Locate and remove stoppage Install strainer 5 Replace defective part 2 Increase superheat setting Dampen bulb response by repositioning 2 Readjust the ...

Страница 17: ...er supply must be 24V AC 2 MR valve installed backward 2 Arrow on MR valve should point in direction of gas flow 2 Install properly 1 Room Override Thermostat if used calls for heat 1 Remove T115 wires from amplifier terminals 3 and 14 1 If proper operation is obtained check thermostat wiring for shorts Rotate thermostat dial above and below room temperature to prove thermostat function 2 Open cir...

Страница 18: ...obstruction in gas pipe ahead of controls Increase gas pressure if possible H Incorrect discharge air temperature 1 Calibration 1 Check seal on calibration potentiometer 1 Recalibrate per Temperature Calibration procedure 1 Dirty or sticking plunger 1 Examine Plunger should be clean smooth and operate freely in solenoid sleeve 1 Clean or replace plunger if necessary 2 Loose or broken wiring 2 Insp...

Страница 19: ...19 ...

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Addison B, Инструкция по установке, эксплуатации и обслуживанию

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