Bristol H23B15QABH 설치 및 서비스 지침 매뉴얼 - 페이지 4

{카테고리_이름} Bristol H23B15QABH에 대한 설치 및 서비스 지침 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Bristol H23B15QABH 18 페이지. Refrigeration/air conditioning/heat pump compressors

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inlet. In addition, a bi-directional heat pump liquid line drier or factory recommended driers must be

installed. NOTE: ALWAYS REMOVE OLD FILTER DRIERS.

BRAZE ON SUCTION AND DISCHARGE LINES. Flow an inert gas, such as nitrogen or CO

system at approximately 2 psig. This will reduce the possibility of oxidation inside the tubing. Braze on the

suction and discharge lines and braze the process tube shut following the recommendation listed below (if

the process tube is to be used, it should be brazed shut after the system has been charged):

COPPER TUBING:

BRAZING ALLOYS

BRAZING PROCEDURE: To ensure properly brazed joints, Bristol Compressors recommends that the

CHECK SYSTEM FOR LEAKS. After installation is complete, pressurize the system to 75 psig using

nitrogen and a few ounces of system refrigerant. Check for leaks using a halide torch, soap bubbles or an

electronic halogen leak detector. When all connections test satisfactorily, release pressure using proper

recovery procedures, then proceed to next step.

CAUTION: Do not use the Bristol replacement compressor as an evacuation assist and never

apply voltage to a compressor while it is in a vacuum as damage could result.

EVACUATE THE SYSTEM. Use a vacuum pump designed for this purpose. Vacuum must be pulled on

the discharge (high side) and suction (low side) of the system. Evacuate to 200 microns or lower.

CHECK THE ELECTRICAL SYSTEM. While the system is evacuating, connect the electrical leads to the

compressor terminals. Verify that the electrical system is wired according to the unit's manufacturer and

Bristol's wiring diagram on page 9. Verify that the electrical components match those specified on the

compressor electrical data sheet on pages 10 through 14. Start components (start capacitor and relay)

are required on all systems that incorporate a hard shut-off or non-bleed thermostatic expansion

valve. It is a normal practice to replace all starting components any time a compressor is changed. Check

all connections and terminals to be sure they are tight. Connect the crankcase heater (standard on all "A"

Series). Power to the crankcase heater must be energized continuously. Voltage to an insertion type

heater can be anything between 187 to 600 volts. Operational voltage for wrap-around type heaters must

be verified.

WARNING: Application of voltage to the compressor with the terminal cover and retainer removed

can result in serious personal injury or death.

If additional copper tubing is required, use only clean, dehydrated refrigeration

grade tubing with sealed ends.

CAUTION: Do not use 95/5, 50/50 or 40/60 soft solder for brazing.

Phos Copper, or similar brazing alloys with high tensile strength on copper

welds only. Weld steel to copper only with silver brazing alloys.

following steps be used:

a. Exercise extreme care when cutting and forming tubes to keep dirt, filings,

and other contaminants from entering the system.

b. Do not use excessive amounts of brazing alloy as some of the excess may

penetrate the joint and enter the system.

c. If flux must be used, take necessary precautions to ensure that the flux does

not enter the system.

d. Use damp cloths or other heat absorbent material to ensure that the factory-

brazed joints on the compressor do not become damaged. If damp cloths

are used, take care not to allow moisture to enter the system.

e. Do not overheat brazed joints as excess heat will cause formation of copper

oxide on the inside wall of the tubing. Flow an inert gas through the system,

as explained above.

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Use Sil-Fos or