25
CHARGING PROCEDURE - HIGH SIDE
MD50W 2 Valve Manifold [FIG.24]
MD100W 4 Valve Manifold [FIG.25]
1.)
A scale should be used to weigh in the charge. Place tank on scale so liquid refrigerant is supplied.
2.)
Open Supply tank valve to fill manifold with liquid refrigerant.
3.)
Set scale to record charge amount.
4.)
Open High Side Valve (B). Monitor weight reading.
5.)
Once desired charge amount has been reached, close High Side Valve (B) and supply tank valve.
6.)
Start refrigeration system. Open Low Side valve (A) to allow all remaining refrigerant in manifold and
service hoses to charge into system.
7.)
Close Low Side Valve (A).
7.)
Close Low Side Valve (A) and Valve (C).
8.)
Monitor Low and High Side pressures. Superheat and subcooling features of manifold can be used at this time.
9.)
Disconnect service hoses from equipment. Use Caution as all hoses are under pressure.
Once charge is complete, an electronic refrigerant leak detector should be used to confirm leaks do not exist.
High Side Charging should be done on a completely evacuated system.
APPENDIX A (MANIFOLD SPECIFICATIONS)
High side pressure range
-14.7 to 800.0 PSIG (-1.0 to 55 bar)
Low side pressure range
-14.7 to 800.0 PSIG (-1.0 to 55 bar)
Pressure reading accuracy
+/- 1% of reading or +/- 0.5 PSIG (+/- 0.05 bar)
Pressure reading resolution
0.5 PSIG (0.05 bar)
High and low side burst pressure
1500.0 PSIG (103.4 bar)
High side temperature range
-58.0 °F to 302 °F (-50 °C to 150°C)
Low side temperature range
-58.0 °F to 302 °F (-50 °C to 150°C)
Temperature reading accuracy
+/- 0.36 °F (+/- 0.2°C)
Vacuum indication accuracy
+/- 10 microns (requires MDXVG accessory)
SH, SC and saturation temperature accuracy
+/- 0.5°F (+/- 0.3°C)
Instrument working temperature
-4.0 °F to 122°F (-20°C to 50°C)
Instrument working RH range
0% to 100% non-condensing
Total number of stored refrigerants
93
APO (Automatic Power Off)
10 minutes. Can be disabled by user.
MD100W size (L x H x W)
8.1” x 3.5” x 7.0” (20.5 cm x 8.9 cm x 17.8cm)
MD50W size (L x H x W)
8.1” x 2.5” x 7.0” (20.5 cm x 6.4 cm x 17.8cm)
MD100W weight
3.3 lb. (1.5 kg)
MD50W weight
3.0 lb. (1.4 kg)
Display Life (Using 4
industrial alkaline AA
batteries (included)
Backlight full ON:
25+ hrs. continuous duty
Backlight full OFF:
60+ hrs. continuous duty
Display Life Using 4
Rechargeable NiMH AA batteries
(not included):
Backlight full ON:
20+ hrs. continuous duty from full charge
Backlight full OFF:
50+ hrs. continuous duty from full charge
APPENDIX B (MDXVG VACUUM GAUGE ACCESSORY SPECIFICATIONS)
Sensor Type
Self - heated thermistor bridge with integral temperature compensation from
0 to 50 °C (32 to 122 °F).
Display Pressure Range
AUTO-RANGING SCALES:
0 to 99 microns
1 micron resolution
100 to 990 microns
10 micron resolution
1000 to 9900 microns
20 micron resolution
10000 to 25000 microns 50 micron resolution
above 25000 microns
Will display low side pressure reading, in
selected unit.
Accuracy
+/- 10% of reading or +/- 10 microns, whichever is greater
Operating Temperature Range
Compensated (accuracy as stated): 0°C TO 50°C (32°F TO 122°F)
Non-compensated (add +/- 0.5% of reading error for every °C outside
compensated range): -10 to 0°C (14 to 32°F)
Operating and Storage Humidity
0 to 95%, non-condensing
Storage Temperature
-40 to 85°C (-40 to 185°F)
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