23
Guidelines Of Field-charging Air Conditioning Systems With Scroll
Compressors
These guidelines are intended for use with Scroll compressors only with R22, R407C, R134a, R404A, R507,
and R410A refrigerants. They do not apply to reciprocating compressors or competitive Scroll compressors.
FIELD-CHARGING - SOME PRECAUTION POINTS
Scroll compressors have a very high volumetric efficiency and quickly pump a deep vacuum if there is insuffi-
cient refrigerant in the system or if refrigerant is added too slowly. Operation with low suction pressure will
quickly lead to very high discharge temperatures. While this process is happening, the scrolls are not being well
lubricated - scrolls depend on the oil mist in the refrigerant for lubrication. A lack of lubrication leads to high
friction between the scroll flanks and tips and generates additional heat. The combination of heat of compres-
sion and heat from increased friction is concentrated in a small localized discharge area where temperatures
can quickly rise to more than 300°C. These extreme temperatures damage the Scroll spirals and the orbiting
Scroll bearing. This damage can occur in less than one minute especially on larger compressors. Failure may
occur in the first few hours or the damage done during field charging may show up some time later.
Other typical field charging problems include undercharging, overcharging, moisture or air in the system etc. In
time each one of these problems can cause compressor failure.
EQUIPMENT
Minimal equipment is required for field charging. The minimum equipment required to do a satisfactory job is:-
Set of service gauges
Hoses
Vacuum pump
Vacuum gauge
Scales
Thermometer
CHARGING HOSES
Most field-charging is done using standard service hoses. Hoses are made in different colors with different
working pressures and with different leak rates but the most important point is the presence or absence of
Shredder valve depressors. Shredder valve depressors severely restrict the flow through the service hoses.
This slows evacuation and vapor charging dramatically. In most cases the Shredder depressor can be removed
but it is simpler to have one set of hoses with and one set without Shredder depressors.
Hose selection is important depending whether the system is being evacuated or charged. Charging liquid from
the cylinder into the liquid line should be carried out using an open hose connected to an unrestricted fitting. This
will reduce charging time.
Hose with Shredder valve Depressor
Hose without Shredder valve Depressor
Содержание ADB100D
Страница 13: ...11 Standard Models Refrigerant Circuit Diagram...
Страница 14: ...12 MODEL AMC200D2 250D2 300D2 WITH ACCUMULATOR...
Страница 31: ...29 ADB75B NC CURVE ADB100B NC CURVE...
Страница 32: ...30 ADB125B NC CURVE ADB150B NC CURVE...
Страница 45: ...43 FAN PERFORMANCE CURVE ADB250D Example 1...
Страница 46: ...44 FAN PERFORMANCE CURVE ADB75B...
Страница 47: ...45 FAN PERFORMANCE CURVE ADB100B...
Страница 48: ...46 FAN PERFORMANCE CURVE ADB125B...
Страница 49: ...47 FAN PERFORMANCE CURVE ADB150B...
Страница 50: ...48 FAN PERFORMANCE CURVE ADB200B ADSB200B...
Страница 51: ...49 FAN PERFORMANCE CURVE ADB250B ADSB250B...
Страница 52: ...50 FAN PERFORMANCE CURVE ADB300B ADSB300B...
Страница 53: ...51 FAN PERFORMANCE CURVE ADB350B ADSB350B...
Страница 54: ...52 FAN PERFORMANCE CURVE ADB400B ADSB400B...
Страница 55: ...53 FAN PERFORMANCE CURVE ADB450B...
Страница 56: ...54 FAN PERFORMANCE CURVE ADB500B ADSB500B...
Страница 57: ...55 FAN PERFORMANCE CURVE ADB600B...
Страница 58: ...56 FAN PERFORMANCE CURVE ADB750B...
Страница 59: ...57 FAN PERFORMANCE CURVE ADB75D...
Страница 60: ...58 FAN PERFORMANCE CURVE ADB100D...
Страница 61: ...59 FAN PERFORMANCE CURVE ADB125D...
Страница 62: ...60 FAN PERFORMANCE CURVE ADB150D...
Страница 63: ...61 FAN PERFORMANCE CURVE ADB200D...
Страница 64: ...62 FAN PERFORMANCE CURVE ADB250D...
Страница 65: ...63 FAN PERFORMANCE CURVE ADB300D...
Страница 66: ...64 FAN PERFORMANCE CURVE ADB400D...
Страница 67: ...65 FAN PERFORMANCE CURVE ADB500D...
Страница 68: ...66 FAN PERFORMANCE CURVE ADB75D VERY HIGH STATIC...
Страница 69: ...67 FAN PERFORMANCE CURVE ADB100D VERY HIGH STATIC...
Страница 70: ...68 FAN PERFORMANCE CURVE ADB125D VERY HIGH STATIC...
Страница 71: ...69 FAN PERFORMANCE CURVE ADB150D VERY HIGH STATIC...
Страница 183: ...181 INDOOR ADB B SERIES MODEL ADB 75 100 B MODEL ADB 125B Dimension in mm Dimension in mm 8 DIMENSIONAL DATA...
Страница 184: ...182 MODEL ADB 150B Dimension in mm...
Страница 189: ...187 ADB D SERIES MODEL ADB 75D MODEL ADB 100D Dimension in mm Dimension in mm...
Страница 190: ...188 MODEL ADB 125D MODEL ADB 125D2 Dimension in mm Dimension in mm...
Страница 191: ...189 MODEL ADB 150D1 MODEL ADB 150D2 Dimension in mm Dimension in mm...
Страница 192: ...190 MODEL ADB 200D2 MODEL ADB 250D2 Dimension in mm Dimension in mm...
Страница 193: ...191 MODEL ADB 300D2 MODEL ADB 400D4 Dimension in mm Dimension in mm...
Страница 195: ...193 OUTDOOR MODEL AMC 75 100 125B MODEL AMC 75C NOTE FOR VERTICAL AIR DISCHARGE Dimension in mm Dimension in mm...
Страница 196: ...194 MODEL AMC 100C MODEL AMC 150C Dimension in mm Dimension in mm...
Страница 197: ...195 MODEL A 4 MC 75 100D MODEL A 4 MC 125D Dimension in mm Dimension in mm...
Страница 198: ...196 MODEL A 4 MC 150D MODEL AMC 200D2 Dimension in mm Dimension in mm...
Страница 199: ...197 MODEL AMC 250 300D2 Dimension in mm...
Страница 200: ...198 MODEL AMC 75F MODEL AMC 100 125F Dimension in mm Dimension in mm...
Страница 218: ...216 10 WIRING DIAGRAMS COOLING UNIT MODEL ADB 75B vs AMC 75B...
Страница 219: ...217 COOLING UNIT MODEL ADB 75B vs AMC 75C...
Страница 220: ...218 COOLING UNIT MODEL ADB 100B vs AMC 100B...
Страница 221: ...219 COOLING UNIT MODEL ADB 100B vs AMC 100C...
Страница 222: ...220 COOLING UNIT MODEL ADB 125B vs AMC 125B...
Страница 223: ...221 COOLING UNIT MODEL ADB 150B vs AMC 150C...
Страница 224: ...222 COOLING UNIT MODEL ADB 75D vs A 4 MC 75D...
Страница 225: ...223 MODEL ADB 100D vs A 4 MC 100D...
Страница 226: ...224 MODEL ADB 125D vs A 4 MC 125D...
Страница 227: ...225 MODEL ADB 150D1 vs A 4 MC 150D...
Страница 228: ...226 MODEL ADB 75D vs AMC 75F...
Страница 229: ...227 MODEL ADB 100D vs AMC 100F...
Страница 230: ...228 MODEL ADB 125D vs AMC 125F...
Страница 232: ...230 MODEL ADB 200D2 vs AMC 200D2 ADB 250D2 vs AMC 250D2...
Страница 233: ...231 MODEL ADB 300B2 vs AMC 150C x 2 ADB 300D2 vs A 4 MC 150D x 2...
Страница 234: ...232 MODEL ADB 300D2 vs AMC 300D2...
Страница 235: ...233 MODEL ADB 300B3 vs AMC 100B x 3 ADB 300B3 vs AMC 100C x 3 ADB 350B3 vs AMC 125B x 2 AMC 100B...
Страница 236: ...234 MODEL ADB 450B3 vs AMC 150C x 3...
Страница 237: ...235 MODEL ADB 400B4 vs AMC 100B x 4 ADB 400B4 vs AMC 100C x 4 ADB 400D4 vs A 4 MC 100D x 4 ADB 500D4 vs A 4 MC 125D x 4...
Страница 238: ...236 MODEL ADB 600B4 vs AMC 150C x 4...
Страница 239: ...237 MODEL ADB 750B5 vs AMC 150C x 5 WITH MAGNETIC CONTACTOR AS STANDARD...
Страница 278: ...276 MODEL AMC200D2 250D2...