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2. Dryer Installation
• Never work on unit under pressure!
• Never work on unit when power is connected.
• Do not over-pressurize unit.
• Install unit in a clean, cool (50º - 100ºF / 10º - 38ºC); well lighted location
• Do not shut unit off at disconnect switch except during service. Unit must be turned on and off by
the panel switch located on the dryer.
• Do not operate dryer at abnormal conditions (high flow, high inlet temperature, high ambient,
high inlet pressure, etc.)
2.1. Airline Plumbing
• Air piping must be supported independently of the dryer.
• If vibration is present, flexible metal hoses (or other vibration dampening methods) must be
installed to prevent it from being transmitted to the dryer.
• Use unions or flange joints.
• Install a bypass line and gate valves to permit isolation of the dryer from the air system. This is
done to provide easy service and/or removal of the dryer without interruption of air to the system.
• Make the connection to the draining system, avoiding connection in a closed circuit shared by
other pressurized discharge lines. Check the correct flow of condensate discharges. Dispose of all
condensate in conformity with current local environment regulations.
• Direction of flow through the dryer must be observed. A check valve on the outlet of the dryer to
prevent back flow and false loading is recommended.
2.2. Electrical Connections
To be performed by a qualified person only. Risk of serious injury or death.
Observe Lock Out/Tag Out Procedure: Disconnect, lock out and tag all power at source prior to
attempting repairs or adjustments to rotating machinery and prior to handling any ungrounded conductors.
Provide breach and short circuit protection as well as disconnect means per local and national codes.
Before connecting electrical power to the dryer check for correct voltage at the connection box.
All units must be externally grounded to protect against severe electrical shock.
• Check for correct voltage and phase at electrical connection box.
• Install a fused disconnect switch near the dryer per the local codes.
• Connect power to the main lugs of dryer disconnect switch located in the high voltage enclosure.
• Make sure no bare wire is exposed; replace box cover and screw closed.
• Caution: Wire the dryer separately from the air compressor.
The dryer must NOT cycle on and off with the air compressor.
• Phase rotation is only important if the dryer has a 3-phase condenser fans (MSC4000-15000).
Fans must PULL air through the condenser coil.
• Crankcase heaters are pre-wired from the factory to the line side of the compressor contactor.
When power is applied to the dryer, the heater will energize. Heaters must be energized at all
times, therefore the main disconnect must be left on except when servicing the dryer. Heater must
be energized for 12 hours prior to start–up and after prolonged shut down 2 hours or more).
The power must be left on at all times except when servicing.
MSC4000 - MSC15000 USER MANUAL
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CAUTION
SHOCK
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SHOCK
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CAUTION
SHOCK
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CAUTION
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Troubleshooting
