4
MRD200-750
Models 200-750
• Manual Draining - Drain valve handle shall be rotated
slightly past the drain isolation position to allow
throttling through the valve for manual discharge
and depressurization.
•
NOTE
: (Models 200-750 only) The quick disconnect
fitting allows removal of the entire drain assembly.
However, the unit must be depressurized prior
to disassembly or serious injury may occur.
NOTE:
Discharge is at system pressure. Drain line should
be anchored.
NOTE:
Condensate may contain oil. Comply with applicable
laws concerning proper disposal.
I - Controller Level 2 - Model 100 (Optional)
Models 125-750 (Standard)
Condensate
Draining
Drain
Push-to-Test
On/Off
Switch
Switch Legend
Power On
Light
Compressor On
Light
Dew Point
Temperature
Indicator
33F......................39F
1C.......................4C
I - Controller Level 1 - Model 100 (Standard)
On/Off
Switch
Power On
Light
Dew Point
Indicator
2.0 OPERATION
2.1 Minimum/Maximum Operating Conditions
A. Maximum inlet air pressure: refer to dryer serial
number tag
B. Minimum inlet air pressure: 30 psig (2.1 kgf/cm
2
)
C. Maximum inlet air temperature: 120°F (49°C)
D. Maximum ambient temperature:
Air-cooled models: 110°F (43°C)
Water-cooled models: 130°F (54°C)
E. Minimum ambient temperature: 40°F (4°C)
2.2 Start-up
IMPORTANT:
Energize dryer disconnect switch (provided by
others, see NEC) 24 hours before refrigeration compressor
is started! Never use the disconnect switch to shut-down
the dryer for a extended period of time (except for repair).
Failure to follow these instructions may result in a non-
warrantable compressor failure.
NOTE:
It is recommended that dryer be started 15 minutes
before compressed air flow begins.
NOTE:
If there is no power to the control board for a period
of two weeks or more, it may return to the default mode.
1. Confirm On/Off Switch is in the “Off” position.
2. On water-cooled models: after 24 hours, begin cooling
water flow.
3. Check for proper electrical voltage.
4. Energize dryer. Green power-on light will illuminate.
5. Slowly pressurize unit air side by opening inlet isolation
valve. Check for leaks.
6. After 15 minutes, open outlet isolation valve slowly.
7. Close air by-pass valve.
8. Identify Controller on dryer.
A. Models with I-Controller Level 1 or 2 - proceed to
Step 9.
B. For Models with I-Controller Level 4, see Section
2.6 for further instructions.
9. Toggle ON/OFF switch to the ON position.
