TIF 25176B User Manual

25176B

REFRIGERANT RECOVERY SYSTEM

USER’S OPERATING MANUAL

TABLE OF CONTENTS

IMPORTANT SAFETY INFORMATION 4 OPERATING GUIDELINES 5-6

CARE AND MAINTENANCE OF YOUR 25176B 6 ADDITIONAL RECOVERY TANK INFORMATION 7

PURGING NON-CONDENSABLE GASES 8 HELPFUL HINTS FOR REFRIGERANT RECOVERY 9-10 OPERATING YOUR 25176B 11 DIAGRAM FOR REFRIGERANT RECOVERY 11 SELF PURGING YOUR 25176B 12 SELF PURGE/AUTO EVACUATE 12 DIAGRAM FOR “PUSH/PULL” METHOD 13

SET-UP DIAGRAM FOR TANK PRE OR SUB COOLING PROCEDURE 13 OPTIONAL RECOVERY / TANK PRE OR SUB 14

COOLING FOR FIXED HOSE SET-UP REFRIGERANT FLOW DIAGRAM 15

25176B PARTS DIAGRAM/PARTS AND ACCESSORIES LIST 16 25176B AND 25176B-KT WIRING DIAGRAMS 17

INSTALLATION OF OPTIONAL 80% TANK 18 CAPACITY SENSING COMPONENTS (KIT KT-5001) 25176B-KT MODEL 18 TROUBLESHOOTING YOUR 25176B 19 FULL ONE YEAR WARRANTY 20 ENVIRONMENTAL PROTECTION AGENCY (EPA) INSTRUCTIONS 21

EPA REGIONAL OFFICES 22

m IMPORTANT SAFETY INFORMATION m

SAFETY COMES FIRST! Read all safety, operating guidelines and instructions before operating your 25176B.

1. CAUTION: ONLY A QUALIFIED TECHNICIAN SHOULD OPERATE THIS RECOVERY UNIT.

The operator must be familiar with air conditioning

and refrigeration systems, refrigerants and the dangers of pressurized components.

2. Always think before acting, familiarity breeds care-

lessness and carelessness can be harmful to your

health or, worse, result in death.

m WARNING Always wear safety goggles and

protective gloves when working with refrigerants. Contact with refrigerant may cause injury. Disconnect hoses with extreme caution! All hoses may contain liquid refrigerant under pressure.

m PRESSURIZED TANK CONTAINS LIQUID

REFRIGERANT. NEVER OVERFILL STORAGE TANKS. OVERFILLING OF THE TANK MAY

CAUSE AVIOLENT EXPLOSIONAND POSSIBLE INJURY OR DEA TH.DO NOT:Exceed the working

pressure of Recovery Tank cylinder.

m Warning: DO NOT: Exceed the working pres-

sure of each cylinder. Recovery cylinders are designed for different pressures. Your 25176B is not supplied with a recovery tank, it requires the use of tanks with a minimum of 350 psi working pressure and ROBINAIR strongly recommends the use of 400 psi tanks.

NOTE: The use of a 400 psi tank is mandatory when recovering R410A. See ROBINAIR Recovery Tanks under Parts and Accessories section on Page 16.

m A scale must be used to avoid overfilling the

storage tank. DO NOT OVERFILL. Tank is full at

80% volume. Tank may explode if filled more than

80% due to liquid expansion.

7. Use ONLY authorized refillable refrigerant tanks.

NEVER use a standard disposable 30lb. tank (the

type of container in which virgin refrigerant is sold) to recover refrigerant.

8. Read all safety information regarding the safe handling of refrigerant and refrigerant oil, includ- ing the Material Safety Data Sheet. MSDS sheets can be obtained from your refrigerant supplier.

9. If you expect temperatures in excess of 135° F, contact the refrigerant supplier.

10. Be sure that any room where you are working is thoroughly ventilated, especially if a leak is suspected. Refrigerant vapor is hazardous to your health and can cause death.

11.

m Avoid breathing A/Crefrigerantand lubrica-

tion vapor or mist. Exposure may irritate eyes, nose and throat. If accidental system discharge occurs,ventilate workareabefore resumingservice.

12.

iWARNING:TOREDUCE THE RISKOF FIRE:

• Never operate unit in an explosiveenvironment! Do not use this equipment in the vicinity of spilled or open containers of gasoline or any other flammable liquid.

• When using an extension cord it should be a 3-wire, 14 AWG minimum and no longer than 25 feet.

• Use this equipment in locations with mechani-

cal ventilation that provides at least four air changes per hour or locate the equipment at least 18 inches above the floor.

• Never use oxygen when testing for leaks. Any oil in contact with oxygen under pressure will form an explosive mixture.

13.

c High voltage electricity inside panels.

Risk of electrical shock. Be sure to disconnect

theunit from the powersource before servicing it.

14. To reduce the risk of injury, care should be taken when moving this equipment.

m Before operating the 25176B recovery unit, read

the following

1. 25176B IS APPROVED FOR USE WITH THE FOLLOWING CATEGORY III, IV and V REFRIGERANTS (Per ARI 740):

R-12, R-22, R-134A, R-401A, R-401B, R-401C, R-402A,R-402-B,R-404A,R-406A, R-407A, R-407-B, R-407C, R-407D, R-408A, R-409A, R-410A,R-411A, R-411B, R-412A, R-500, R-502, R-507 and R-509

2. A FILTER must always be used and should replaced frequently. We recommend that a clean filter be used for every service job. Failure to use a filter will invalidate your warranty.

The use of a filter will greatly reduce the risk of damage to your 25176B, by preventing foreign material from entering the unit.

3. Each filter should be labeled and used exclusively

for one type of refrigerant only.

4. Always open service and cylinder valves slowly.

This allows rapid control of the flow of gases if there is any danger. Once it is determined that there is no danger, the valves can be opened fully.

5. Always isolate large amounts of refrigerant and

close off valves after use, so if a leak should develop anywhere in the system, the refrigerant will not escape.

6. Keep all connections to the refrigeration system

thoroughly dry and clean. If moisture enters the refrigeration system, it is likely to cause considerable damage.

7. Robinair strongly recommends the use of the

optional 80% Capacity Shutoff Kit (p/n KT-5001). When installed and used with a recovery tank that has an internal float switch, the 25176B will shut down automatically when the tank is 80% full. Your

25176B is pre-wired from the factory for this kit. Note:The 25176B is also available in model 25176BKT, with the 80% Shutoff Kit installed direct from the factory.

m CAUTION: Use only authorized refillable

refrigerant recovery tanks. Federal regulations

require refrigerant to be transported only in con-

tainers meeting DOT spec. 4BA or 4BW.

NEVER use a standarddisposable 30lb.tank

(the typeof container in which virgin refrigerant is

sold) to recover refrigerant.

m A scale must be used to avoid overfilling the

storage tank. DO NOT OVERFILL. Tank is full at 80% volume. Tank may explode if filled more than 80%due toliquid expansion. Below is a represen- tative sample for R-22 refrigerant:

TANK SIZE MAX NET WEIGHT

30 lb. Tank 24 lbs. 50 lb. Tank 40 lbs.

Note: Robinair strongly recommends the use of the ADS-100 Refrigerant Scale for monitoring tank

capacity.

10. Your 25176B has an Internal Pressure Shut Off Switch. If the pressure inside the system should go above 470 psi, the system will automatically

shut itself off.The shut off switch will automatically

reset itself again after the pressure drops below 300 psi.

m WARNING: The Internal Pressure Shut Off

Switch does not prevent tank overfill. If your system shuts off on high pressure and is connected to your tank, you may have overfilled your tank and created a very dangerous situation! Take immediate measures to relieve any high pressure and/or tank overfill.

11. When recovering large amounts of liquid, use the "Push/Pull method (see diagram on page 13).

m CAUTION: When using the "Push/Pull" method,

once the "Push/Pull" siphon is started, it can continue and overfill the storage tank even if the tank is equipped with a "shut off" float sensor. The siphon can continue even after the machine is turned off. You must manually close the valves on the tank and the unit to prevent overfilling of the recovery tank.

12. Always operate the unit on a flat level surface

13. To achieve the deepest final vacuum, use the tank cooling method to lower the head pressure on the recovery tank. (See Pages 13 &14). Repeat as necessary to achieve the desired vacuum level.

OPERATING GUIDELINES

NOTE: If there is no liquid in the recovery tank, then the cooling method will not work. In this case, use an empty tank that has been fully evacuated to achieve the final vacuum level required.

14. If the tank pressure exceeds 300 psi, use the tank cooling procedure to reduce the tank pressure.

(See Pages 13 & 14)

15.To maximize recovery rates, use the shortest possible length of 3/8" or larger hose. Ahose no longer than 3 feet is recommended.

16. For maximum throughput, always remove all unnecessary hose core depressors and the Schraeder valves from port connections.

17. Deformed rubber seals and core depressors in hoses and faulty or unnecessary Schraeder valves can restrict flow up to 90%.

OPERATING GUIDELINES - cont.

1. USE of a filter/dryer at the inlet is mandatory. A filter/dryer must always be used between the recovery machine and the inlet hose.

2. Special care should be taken when recovering from a "burned-out" system. Use two high acid capacity filters, in series. (Alco type EK-162-F or Sporlan type C-162-F are recommended )When you have finished recovering from the system, flush your 25176B with a small amount of clean refrigerant and refrigerant oil to purge off any foreign substances left in the unit.

3. Always empty refrigerant from the 25176B into a storage tank; see Self-Purge/Auto Evacuate

procedure on Page 12. Liquid refrigerant left in the 25176B’s condenser may expand, causing damage to components.

c Warning! Whenever you perform any type of

maintenance work on your 25176B, insure that it is disconnected from the power supply before you begin.

5. If the unit is to be stored or not used for any length of time, we recommend that it be completely evacuated of any residual refrigerant and purged with dry nitrogen.

CARE AND MAINTENANCE OF YOUR 25176B

m Warning: Also read the information pertain-

ing to recovery tanks, previously listed under Safety Information and Operating Guidelines.

1. CAUTION: NEVER use a standard disposable 30lb. tank (the type of container in which virgin refrigerant is sold) to recover refrigerant. Use ONLY authorized refillable refrigerant tanks. Federal regulations require refrigerant to be trans ported only in containers meeting DOT specs. 4BW or 4BA.

m Warning: DO NOT: Exceed the working pres-

the use of 400 psi tanks. NOTE: The use of a 400 psi tank is mandatory when recovering R-410A. See ROBINAIR Recovery Tanks under Parts and Accessories section on Page 16.

3. Tanks and filters should be designated for one refrigerant only. Before using a tank previously used for another refrigerant, completely empty the

tank, evacuate it and purge the tank using dry nitrogen, and then re-evacuate it.

4. Always store refrigerant containers in a cool dry

place.

5. Do not mix refrigerants in a system, a tank or any

where else. Each type of refrigerant must have its own tank, filter, etc.

6. Storage cylinders sometimes have valves that are

not properly seated when manufactured. Keeping caps on these valves will guard against refrigerant leakage.

7. Do not exceed 80% of tank capacity. ROBINAIR

strongly recommends the use of the ADS-100

Refrigerant Scale for monitoring tank capacity.

Safety codes recommend that closed tanks not be filled over 80% of volume with liquid. The remaining 20% is called head pressure room.

8. If you expect temperatures in excess of 135° F,

contact the refrigerant supplier.

ADDITIONAL RECOVERY TANK INFORMATION

m NEVER TRANSPORT AN OVERFILLED CYLINDER m

Refrigerant expands when it gets warm and may cause a tank to explode if overfilled.

CYLINDER TEMPERATURE 60°F 70°F 100°F 130°F 150°F

STARTING WITH CYLINDER

80% BY VOLUME

SPACE OCCUPIED BY LIQUID 80% 81% 83% 90% 94%

STARTING WITH CYLINDER

90% BY VOLUME

SPACE OCCUPIED BY LIQUID 90% 92% 96% 100%

1. Allow the tank to sit undisturbed for 24 hours. This allows the air to rise to the top.

2. Connect a manifold to the tank and read the amount of pressure in the tank by looking at the output pressure gauge.

3. Determine the ambient temperature in the room.

4. Refer to a Refrigerant pressure/temperature chart.

Find the temperature on the chart and look across

to the corresponding pressure for the type of refrigerant in the tank. Determine how that relates to the reading on the gauge.

5. If the pressure reading is higher than the pressure shown on the chart, very slowly (so as not to cause turbulence inside the tank) crack open the vapor port valve. Watch the pressure on the gauge decrease. To prevent venting, add 4-5 psi to the pressure shown on the chart. when the gauge corresponds to that pressure, close the vapor port valve.

6. Allow the tank to sit for 10 minutes and check the pressure again.

7. Repeat the process again if necessary.

PURGING NON-CONDENSABLE GASES

FROM REFRIGERANT TANK

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