WABCO 1200E, Maintenance Manual

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5 Appendix II — Application Info
35
Meritor WABCO Maintenance Manual 34 (Revised 03-16)
5 Appendix II — Application Info
Hazard Alert Messages
Read and observe all Warning and Caution hazard alert messages in
this publication. They provide information that can help prevent
serious personal injury, damage to components, or both.
WARNING
To prevent serious eye injury, always wear safe eye protection
when you perform vehicle maintenance or service.
Requirements
NOTE: For complete installation and operating requirements, refer
to TP-9672, Air Dryer Application Guidelines. To obtain this
publication, refer to the Service Notes page on the front inside cover
of this manual.
앫
Compressor discharge line should have a continual downhill run
to the air dryer. There should be no water traps (low points or
kinks) in the line before or after the dryer.
앫
Mount air dryer so that there is no direct splash or spray from a
wheel.
앫
For maximum operating efficiency, mount dedicated purge tank
ABOVE the air dryer.
앫
Keep air dryer at least 12-inches (305 mm) from any
heat-producing sources like exhaust manifolds or pipes,
transmissions, etc.
앫
Make sure there are no valves or other devices in the
dryer-to-supply-tank line to prohibit or restrict the flow of air
back from the supply tank to the air dryer.
앫
Feed purge valve by a direct line from the air governor.
Operating Environment
Discharge Line:
앫
Diameter from compressor to air dryer
1/2-inch (12.7 mm) i.d. minimum
앫
Length from compressor to air dryer
Determined by temperature of air at the inlet port of the air dryer.
At normal vehicle operating temperature, the combination of
length or increased diameter must be sufficient to keep
temperature
BELOW 175
°
F (80
°
C) .
Recommendations for discharge lines:
— Compression rating of 21 cfm and under: To minimize the
likelihood of a discharge line blockage during cold climate
operation, it is recommended that for discharge lines exceeding
nine feet (2.75 m) in length, a minimum of three feet (0.91 m) of
1/2-inch (127 mm) thick closed-cell polyethylene pipe insulation
be used at the connection to the air dryer.
— Compression rating over 21 cfm: 10 feet (3.05 m)/20 feet
(6.1 m) — use copper pipe or stainless steel braided teflon
tubing for minimum of first 10 feet (3.05 m).
Operating Parameter Requirement
Temperature (ambient
operating range)
−
40
°
F to 175
°
F (
−
40
°
C to
80
°
C)
Electrical Power (for heater
and solenoid/timer power) 12 or 24 volts available
Thermostat Range (On/Off
temp) 45
°
F, 86
°
F (7
°
C, 30
°
C)