5
•
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.
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.
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
Table 1 Timed drain illuminated LED Settings
Inlet Pressure
75
100*
125
150
200
225
Dryer Model
RNC100
3
3
4
4
4
4
RNC125
3
3
3
3
4
4
RNC150
2
3
3
3
3
4
RNC200
2
3
3
3
3
3
RNC250
2
2
2
3
3
3
RNC300
1
2
2
2
3
3
RNC400
1
2
2
3
3
4
RNC500
1
1
2
2
3
3
RNC600
1
1
1
2
2
3
RNC750
1
1
1
1
2
2
* Recommended and pre-programmed factory settings for each RNC
Series model dryer. Assumes CAGI ADF100 inlet conditions with 100°F
ambient and 10°F air-cooled aftercooler approach temperature.
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 3, see Section 2.6
for further instructions.
9. Toggle ON/OFF switch to the ON position.
2.3 Timer Drain
(Only Models with I-Controller Level 2)
NOTE:
The Timer Drain LED level has been pre-programmed
at the factory for your specific RNC Series dryer.
Programming is based upon a minimum of 100 psi saturated
inlet air pressure and maximum energy efficiency. The drain
open time is fixed at one second and a small amount of air
will be exhausted with each cycle. Generally, no adjustment to
the timer is required.
If water is present downstream of the dryer,
always verify that any condensate drains installed upstream of
the dryer are draining properly before attempting to readjust
the LED setting.
1. For minimum inlet air pressures that fall between
column values, the setting for the lower pressure is
recommended. (i.e. select the 100 psi column values for
124 psi inlet pressure listed in Table 1.)
2. Where the dryer is consistently operating at less than
maximum capacity, it may be possible to increase the LED
set point to minimize air loss. Discretionary adjustments
to the dryer should only be made on a hot, humid day
when the maximum expected air load is flowing through
the dryer. Failure to do so may prevent the condensate
from draining completely when operating under peak
load conditions.
Summary of Contents for RNC Series
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