NIRVANA CYCLING REFRIGERATED DRYER
75 THROUGH 150 SCFM
OPERATORS MANUAL
D127NC
D170NC
D212NC
D255NC
C.C.N. : 80443948
DATE : JULY 2007
REV. : B
Ensure that the operator reads and understands the
decals and consults the manuals before maintenance
or operation.
Ensure that the Operation and Maintenance manual is
not removed permanently from the machine.
Ensure that maintenance personnel are adequately
trained, competent and have read the Maintenance
Manuals.
a
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Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
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CONTENTS PAGE
1.0 CONTENTS 1
2.0 INTRODUCTION 2
3.0 WARRANTY 2
4.0 REFRIGERATED DRYER
NOMENCLATURE 2
5.0 RECEIVING AND INSPECTION 3
5.1 INSPECTION
5.2 UNPACKING AND HANDLING
6.0 SAFETY AND OPERATION
PRECAUTIONS 3
7.0 PRINCIPLES OF OPERATION 5
7.1 INTRODUCTION
7.2 AIR SYSTEM
7.3 MOISTURE REMOVAL SYSTEM
7.4 REFRIGERATION SYSTEM
7.5 THERMAL CIRCULATING SYSTEM
7.6 CONTROLS
CONTENTS PAGE
8.0 INSTALLATION AND
INITIAL START-UP 6
8.1 LOCATION AND MOUNTING
8.2 PIPING AND VALVES
8.3 FILTRATION
8.4 ELECTRICAL CONNECTION
8.5 INITIAL START-UP
9.0 SCHEDULED MAINTENANCE 7
9.1 INTRODUCTION
9.2 REFRIGERANT CONDENSER
9.3 CONDENSATE DISCHARGE
SYSTEM
10.0 TROUBLESHOOTING 8
10.1 INTRODUCTION
10.2 PROBLEM / ACTION GUIDE
11.0 WIRING DIAGRAMS 9
12.0 GENERAL ARRANGEMENT 14
13.0 REPLACEMENT PARTS 16
14.0 ENGINEERING
SPECIFICATIONS 17
CONTENTS
Ingersoll Rand Nirvana Cycling refrigerated air dryers remove moisture,
oil vapor, and other contaminants from compressed air. These
contaminants are detrimental to pneumatically operated appliances,
controls, instruments, machinery and tools. This removal is
accomplished by cooling the air with a refrigeration unit to a temperature
at which moisture in the air is condensed and separated from the air
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stream. The temperature the air is cooled to, normally between 34° and
38°F (1° and 3°C), is known as dew point. This dryer can be easily
installed into various pneumatic systems in which dry air is required or
desired. Please refer to Principles of Operation for complete operating
details.
The Company warrants that the equipment manufactured by it and
delivered hereunder will be free of defects in material and workmanship
for a period of twelve months from the date of placing the Equipment in
operation or eighteen months from the date of shipment from the factory,
whichever shall first occur. The Purchaser shall be obligated to promptly
report any failure to conform to this warranty, in writing to the Company
in said period, whereupon the Company shall, at its option, correct such
nonconformity, by suitable repair to such equipment or, furnish a
replacement part F.O.B. point of shipment, provided the Purchaser has
stored, installed, maintained and operated such Equipment in
accordance with good industry practices and has complied with specific
recommendations of the Company. Accessories or equipment furnished
by the Company, but manufactured by others, shall carry whatever
warranty the manufacturers have conveyed to the Company and which
can be passed on to the Purchaser. The Company shall not be liable for
any repairs, replacements, or adjustments to the Equipment or any costs
of labor performed by the Purchaser or others without Company's prior
written approval.
The effects of corrosion, erosion and normal wear and tear are
specifically excluded. Performance warranties are limited to those
specifically stated within the Company's proposal. Unless responsibility
for meeting such performance warranties are limited to specified tests,
the Company's obligation shall be to correct in the manner and for the
period of time provided above.
THE COMPANY MAKES NO OTHER WARRANTY OR
REPRESENTATION OF ANY KIND WHATSOEVER, EXPRESSED OR
IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE HERBY DISCLAIMED.
Correction by the Company of nonconformities whether patent or latent,
in the manner and for the period of time provided above, shall constitute
fulfillment of all liabilities of the Company for such nonconformities
whether based on contract, warranty negligence, indemnity, strict liability
or otherwise with respect to or arising out of such Equipment.
The Purchaser shall not operate Equipment which is considered to be
defective, without first notifying the Company in writing of its intention to
do so. Any such use of Equipment will be at Purchaser's sole risk and
liability.
Note that this is Ingersoll Rand standard warranty. Any warranty in force
at the time of purchase of the equipment or negotiated as part of the
purchase order may take precedence over this warranty.
2.0 INTRODUCTION
3.0 WARRANTY
4.0 REFRIGERATED DRYER NOMENCLATURE
NOMINAL* WORKING
FLOW NIRVANA CONDENSER PRESSURE NEMA
DRYER (Nm3/hr) CYCLING TYPE (BARG) VOLTAGE RATING
D 127 NC A = AIR COOLED 16 1 = 115-1-60 O = NEMA 1
170 2 = 230-1-60 H = NEMA 4
212 3 = 220-1-50
255
* Nominal Flows indicated are for 100°F inlet temperature, 100°F ambient temperature and 100 psig compressed air pressure.
CONVERSION CHAR
T
127 Nm3/hr = 75 scfm
170 Nm3/hr = 100 scfm
212 Nm3/hr = 125 scfm
255 Nm3/hr = 150 scfm
16 BARG = 230 psig
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5.1 INSPECTION
Upon receiving your Ingersoll Rand air dryer, please inspect the unit
closely. If rough handling is detected, please note it on your delivery
receipt, especially if the dryer will not be uncrated immediately.
Obtaining the delivery person’s signed agreement to any noted
damages will facilitate any insurance claims.
5.0 RECEIVING AND INSPECTION
5.2 UNPACKING AND HANDLING
a
WARNING
Under no circumstances should any person attempt to lift heavy
objects without proper lifting equipment (i.e., crane, hoist, slings or fork
truck). Lifting any unit without proper lifting equipment, may cause
serious injury.
To facilitate handling during shipment, all dryer packages have been
mounted on a base that provides for forklifting between two base
channels. Forks should extend all the way through forklift channels to
reduce unnecessary forces to the dryer during moving. Slings can be
used to lift the crates, but spreader bars must be used to prevent the
slings from exerting a force against the sides of the crates or the dryer.
6.0 SAFETY AND OPERATION PRECAUTIONS
Because an air dryer is pressurized and contains rotating parts, the
same precautions should be observed as with any piece of machinery
of this type where carelessness in operation or maintenance could be
hazardous to personnel. In addition to obvious safety rules that should
be followed with this type of machinery, safety precautions as listed
below must be observed:
1. Only qualified personnel shall be permitted to adjust, perform
maintenance or repair this air dryer.
2. Read all instructions completely before operating unit.
3. Pull main electrical disconnect switch and disconnect any separate
control lines, if used, before attempting to work or perform
maintenance on the unit.
4. Do not attempt to service any part while machine is in an operational
mode.
5. Do not attempt to remove any parts without first relieving the entire
air system of pressure.
6. Do not attempt to remove any part of the refrigeration system without
removing and containing refrigerant in accordance with the EPA and
local regulations.
7. Do not operate the dryer at pressures in excess of its rating.
8. Do not operate the dryer without guards, shields and screen in place.
9. Inspect unit daily to observe and correct any unsafe operating
conditions.
OSHA
Heading Descriptions
a
WARNING
“Warning” is used to indicate a hazardous situation which has some
probability of death or severe injury. Warning should not be considered
for property damage accidents unless personal injury risk is present.
a
CAUTION
“Caution” is used to indicate a hazardous situation which may result in
minor or moderate injury.
a
NOTICE
“Notice” is used to indicate a statement of company policy as the
message relates directly or indirectly to the safety of personnel or
protection of property. Notice should not be associated directly with a
hazard or hazardous situation and must not be used in place of
“Danger,” “Warning,” or “Caution.”
a
NOTICE
The user of any air dryer manufactured by Ingersoll Rand, is hereby
warned that failure to follow the above Safety and Operation
Precautions may result in personal injury or equipment damage.
However, Ingersoll Rand does not state as fact, nor does it mean to
imply, that the preceding list of Safety and Operating Precautions is all
inclusive, and further, that the observance of this list will prevent all
personal injury or equipment damage.
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
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6.0 SAFETY AND OPERATION PRECAUTIONS
Air Under Pressure Will Cause
Injury, Death Or Property Damage.
• Do Not Exceed Pressure Rating.
• Relieve Press. Before Servicing.
• Do Not Modify/Repair/Rework
ASME Coded Pressure Vessels
As Insurance Rating Affected.
READ TECHNICAL MANUAL
Removing fuses will not disconnect
power from dryer. Always disconnect
power from ALL sources before
performing service.
READ TECHNICAL MANUAL
Air Under Pressure Will Cause
Injury, Death Or Property Damage.
• Relieve Press. Before Servicing.
• Condensate Drain Discharges
Under Pressure.
• Drain Requires Periodic
Cleaning (Service).
READ TECHNICAL MANUAL
HIGH VOLTAGE
This unit is charged with
refrigerant under high pressure.
FAN MAY AUTOMATICALLY
START AT ANY TIME
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7.1 INTRODUCTION
Ingersoll Rand Nirvana Cycling dryers remove moisture from
compressed air by cooling the air temperature to between 34° and 38°F
(1 and 3°C). This causes vapors to condense into liquid droplets which
can then be easily removed from the air. The major systems of the dryer
which contribute to its operation are the Air System, the Moisture
Removal System, the Refrigeration System, the Thermal Mass
Circulating System and the Controls. The following paragraphs describe
each of the systems in greater detail.
7.2 AIR SYSTEM
The air system consists of the dryer components which are in contact
with the compressed air. Referring to Figure 1 and following the bold “
AIR
7.0 PRINCIPLES OF OPERATION
FLOW,” hot saturated air from the compressor enters the
precooler/reheater where the air temperature is reduced prior to
entering the chiller by the cool air exiting the air/moisture separator. This
precooling allows for the use of a smaller refrigeration system. The air
then goes into the chiller section where it is further cooled to the desired
dew point by a thermal mass fluid. The temperature of the thermal mass
fluid is maintained by the refrigeration circuit and controls. The air
continues to the separator where moisture is removed, thereby, allowing
the cool, dry air to return back to the precooler/reheater to be heated by
the incoming moist hot air. The air exiting the “reheater” portion of the
dryer should be approximately 15°- 20°F lower than the inlet air
temperature based on standard conditions at full rated flow.
7.3 MOISTURE REMOVAL SYSTEM
Liquid droplets are removed from the air stream in the separator. As the
air and liquid mixture passes through the separator it spins, slows down
and then changes direction. This causes the condensate to fall out of the
air stream and collect in the bottom of the separator. The collected liquid
is removed from the separator by a drain.
7.4 REFRIGERATION SYSTEM
The Refrigeration System consists of all the components which handle
R-404A. This is a hermetically sealed closed-loop system. Referring to
Figure 1 and following the phantom“
REFRIG(R-404A) FLOW,” refrigerant is
shown leaving the evaporator section where, in the process of removing
heat, it is changed from a low pressure liquid into a low pressure gas.
This gas enters the suction side of the compressor where it is
compressed into a high pressure gas. The high pressure gas is cooled
in the air cooled condenser section until it becomes a high pressure
liquid. It then goes through a permanent filter dryer that ensures the
refrigeration system is free of contaminants. A small diameter capillary
tube meters the refrigerant for introduction into the evaporator. The
refrigerant pressure is reduced upon entering the evaporator where as
it evaporates, removes heat from the thermal mass fluid.
7.5 THERMAL CIRCULATING SYSTEM
The thermal mass fluid in an Ingersoll Rand Nirvana Cycling dryer is
continuously circulated in a closed pump loop system. Referring to
Figure 1 and following the dashed “
THERMAL FLUID” line, the heat is
removed from the fluid in the evaporator by the refrigeration system. The
thermal mass reservoir is sized to minimize refrigeration cycles during
reduced air load periods. The thermal mass fluid is pulled from the
bottom of the reservoir and pumped through the chiller, removing heat
from the air and then returned to the evaporator. The pump utilized on
the Ingersoll Rand Nirvana Cycling dryer is a maintenance-free, quiet
cartridge circulator pump similar to those used in residential water
systems. While the refrigeration system cycles on and off based on
loading conditions, the circulating pump runs continuously to maintain
flow through the chiller at all times. Note that when the power switch is
set to the off position, the circulating pump will not operate.
7.6 CONTROLS
The Ingersoll Rand Nirvana Cycling dryer incorporates automatic
controls for proper operation. The thermal mass fluid temperature is
maintained by a thermostat that monitors the temperature and cycles
the refrigeration system in response to varying air flow and temperature.
Upon an increase in the temperature of the thermal mass fluid, the
compressor is cycled on. When the fluid is cooled to its control set point,
the compressor is cycled off. The thermal mass fluid functions as a
thermal storage mass in the Nirvana Cycling dryer.
In addition to the factory set thermostat, a suction pressure gauge is
provided as standard equipment. This gauge monitors the pressure of
the refrigerant gas before it enters the compressor. When the
refrigeration system is running, the suction pressure will pull down to
between 55 to 65 psig, depending upon load and ambient conditions.
After the thermal mass fluid has been cooled and the refrigeration
system is shut off, the system pressure will equalize with a gauge
reading typically between 80 and 150 psig depending on ambient
temperature.
A “High Temp” alarm light is provided to indicate an elevated thermal
mass temperature. The light is controlled by a thermostat that monitors
the thermal mass and closes to energize the light at approximately 50°F.
FLOW DIAGRAM
FIGURE 1
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8.0 INSTALLATION AND INITIAL START-UP
8.1 LOCATION AND MOUNTING
The dryer should not be located in an area where ambient temperature
is likely to exceed 113°F (45°C) or be less than 45°F (7°C). The dryer
must be located in an area that provides sufficient clearance from walls
and other adjoining equipment to allow easy access for servicing and
maintenance requirements. A minimum of 18 inches is required to allow
free flow of air to the condenser inlet. Dryer must be installed on a level
(< 5° slope) surface for proper operation.
On installations with a relatively steady flow rate, the dryer is normally
connected after the air receiver. If loads fluctuate widely, the dryer should
be positioned ahead of the receiver and sufficient storage capacity
downstream is necessary to prevent excessive air flow through the dryer.
When installed after any compressor that causes significant vibration or air
pulsation, such as reciprocating compressors, proper vibration isolation
and pulsation dampening devices should be added to protect the dryer.
a
NOTICE
Failure to comply to the above instructions may result in equipment
malfunction and will void warranty.
8.2 PIPING AND VALVES
Install piping, fittings and accessory items as indicated in Figure 3. For
bypass and isolating purposes, valves (A), (B) and (C) may be
field installed.
The isolation valve permits maintenance of the drain valve without isolating
air flow to the dryer. To operate dryer, all valves labeled in Figure 3 are to
be closed except valves (B), (C) and (D). Valve (A) is used for bypass
purposes and valve (E) is for test and manual drain purposes.
TYPICAL
PIPING ARRANGEMENT
FIGURE 3
a
NOTICE
Always use a backup wrench when making any threaded connection to
the dryer. Failure to use a backup wrench may result in damaged
tubing and components internal to the cabinet.
8.3 FILTRATION
To protect the air dryer from residual compressor oil and ensure
maximum dryer performance, a prefilter is recommended. Highly
efficient prefilters and afterfilters sized to your drying application can be
provided by Ingersoll Rand, and are available factory installed. Call your
local distributor to select the filter that best suits your filtration
requirements. In addition to air filtration, condensate discharge oil/water
separators are also available to address stringent EPA regulations.
8.4 ELECTRICAL CONNECTION
Equipment is available in various electrical configurations. Providing
power to these units is accomplished as follows:
115V/1/60: These units are supplied with a three-wire, 115V cord
assembly as standard. These units need only be plugged into a
suitable 115V/1/60Hz power outlet.
230V/1/60 & 220V/1/50: These units are furnished with a power cord
with leads for a field installed plug. L1, L2, N & GND are indicated on
the leads. Customer is responsible for furnishing a suitable plug. This
plug shall be wired according to the appropriate wiring diagram
included in this manual.
A suitable fused disconnect switch or circuit breaker, in accordance with
national and local code requirements, is recommended for all Ingersoll
Rand equipment. Refer to Section 13 for voltage requirements and load.
a
NOTICE
Never wire directly or connect any additional wires to the compressor
junction box. This may cause severe system malfunction.
a
NOTICE
Care must be used when choosing the circuit of single phase units to
ensure that no excessive voltage variations occur. This may affect the
starting of the compressor and in extreme cases may cause a
compressor burn out. Maximum allowable voltage variation is +15%
and -10% from rated voltage. Voltage variations exceeding the
specified tolerances will void warranty.
8.5 INITIAL START-UP
• Depress the ON/OFF switch. The “Power On” light located in the
ON/OFF switch will illuminate.
• The “High Temp light will illuminate upon start-up and remain that
way until the thermal mass fluid in the chiller reaches 50°F. After the
temperature is reduced below 50°F, the “High Temp” light will go out.
• The suction pressure gauge will typically pull down between 60 and
80 PSIG when the dryer is first started. As the system operates and
thermal mass temperature drops, the suction pressure will also be
lowered to between 55 and 65 PSIG.
• After the refrigeration system shuts off, air flow may be introduced to
the dryer.
a
CAUTION
Slowly pressurize dryer after start-up
a
NOTICE
After installation or a prolonged shutdown, start the dryer with no air
load (no air flow). This enables the dryer to reach its proper operating
temperature in the shortest time possible (typically within 30 minutes)
PRE-FILTER
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9.0 SCHEDULED MAINTENANCE
9.1 INTRODUCTION
Ingersoll Rand Nirvana Cycling dryers require little maintenance. These
dryers utilize hermetically sealed compressors which do not require any
lubrication. Ingersoll Rand recommends component inspection and
service at regular intervals to obtain maximum performance from your
dryer.
9.2 REFRIGERANT CONDENSER
For proper operation, it is imperative that condenser fins be inspected
and cleaned on a regular basis. For applications where excessive dirt,
dust or debris is encountered, more frequent inspection and cleaning
may be required. An optional ambient air filter kit can be easily installed
outside the condenser.
9.3 CONDENSATE DISCHARGE SYSTEM
On a minimum of a monthly basis, the operation of the drain should be
checked. Periodically, the drain should be removed and cleaned to
ensure no debris from the system is trapped inside. Ingersoll Rand
Nirvana Cycling dryers are equipped with a drain isolation valve,
enabling the valves to be cleaned during dryer operation after the drain
isolation valve has been manually closed. The drain isolation valve
requires a quarter turn to isolate the drain from system pressure.
a
WARNING
If your dryer is installed without a drain isolation valves (filter stop),
failure to depressurize the dryer may result in serious injury. Do not
remove the drain valve without depressurizing the unit.
PROBLEM
Moisture down stream
Moisture down stream
High pressure drop across
dryer
SYMPTOM(S
)
Dryer cooling airstream
(Outlet substantially cooler
than inlet)
Inlet and outlet temperatures
are the same.
Outlet pressure substantially
lower than inlet pressure
POSSIBLE CAUSE
Drain failure or adjustment is
required
Excessive flow
Dryer by-pass not closed
No power to the dryer
High suction pressure
Refrigerant leak
Compressor not
running and
fan is running
Compressor and fan not
running
Fluid Circulating System
malfunction
Inlet and outlet valves not
completely open
Inlet and outlet filters
blocked up
No dryer prefilter and heat
exchanger has become
clogged
System operating
temperature is below 32°F
CORRECTIVE ACTION
Dismantle and clean drain and / or strainer.
Repair or replace as necessary.
Check inlet and outlet pressures and system
design capacity. Correct cause of excessive flow
Close by-pass valve
Check power supply and fuses/circuit
breakers
Check and clean condenser / ambient air filter.
Check suction pressure gauge if reading is
0 psig, turn dryer off and contact your
distributor
Check and clean condenser / ambient air filter.
Check ambient temperature and reduce
below 113°F
Compressor relay may be bad, replace relay
Check for loose wire connections at
contactor or loss of power at control board
Inoperative pump or pump may have lost
prime. Check pump and contact Ingersoll
Rand for priming instructions.
Contact your local distributor for further
assistance.
Open valves
Change filter elements
Flush air system as required. Consult your
local distributor.
Turn dryer off and consult your local
distributor for further assistance
a
WARNING
An air dryer always operates under pressure. Any maintenance
procedure that involves disassembly of pipe fittings, valves or any
other components requires the dryer be isolated from the compressed
air stream and fully depressurized.
a
WARNING
Prior to working on the unit, make sure that all curcuit breakers,
disconnect switches and compressed air valves are tagged “OUT OF
SERVICE.”
10.2 PROBLEM / ACTION GUIDE
10.1 INTRODUCTION
Ingersoll Rand Nirvana Cycling dryers are designed for reliable, trouble-free operation. In the event of any dryer malfunction, the guide below has
been developed to facilitate problem identification and corrective actions.
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10.0 TROUBLESHOOTING
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GROUND
GRN
GRN
GRN
LUG
GRN
GRN
GRN
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
550057A
WIRING DIAGRAM
D127NC-A16 THRU D255NC-A16
115/1/60
CONNECTIONS
PUMP
NOTE 7
L1
ELECTRIC DRAIN
L1
GND
N
G
G
GND
N
DRYER ELECTRICAL COMPARTMENT FRONT PANEL
HIGH TEMP
PL
LIGHTED
SWITCH
PL
LIGHT
DRYER ELECTRICAL COMPONENTS
DRYER ELECTRICAL COMPARTMENT
HTA
RTS
SECTION A-A
G
CONNECTIONS
L1 N
L1
N
G
FAN
FOR ACTUAL COMPRESSOR TYPES
REFER TO DRAWING 550059
COMPRESSOR CONNECTIONS
A
2. MAIN INCOMING POWER DISCONNECT AND FUSING WILL BE PROVIDED BY CUSTOMER.
3. POWER CONNECTION TO BE PROVIDED BY FACTORY SUPPLIED POWER CORD.
6. CUSTOMER OPTIONAL CONNECTIONS SHOWN IN SMALL DASHED LINES
1. POWER REQUIREMENT PROVIDED BY CUSTOMER TO BE 120VAC 20A. MAXIMUM FULL LOAD CURRENT AT 15A.
7. RECEPTICAL FOR DRAIN ONLY. MAXIMUM OF 10A ONLY.
NOTES:
5. OPTIONAL EQUIPMENT SHOWN IN DASHED LINES
NOTES:
HIGH TEMP
ALARM SW
REFRIG
TEMP SW
A
LIVE WHEN DRYER IS TURNED OFF
SHOCK HAZARD: SOME CIRCUITS MAY BE
AT CUSTOMER SOURCE BEFORE SERVICING
WARNING: DISCONNECT POWER TO DRYER
UNIT POWER CORD
(TYPICAL)
GROMMETED
ELECTRICAL
COMPARTMENT
HOLES IN
11.0 WIRING DIAGRAMS
WIRING DIAGRAM
D127NC THRU D255NC
115/1/60
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11.0 WIRING DIAGRAMS
550065A
WIRING DIAGRAM
D127NC-A16 THRU D255NC-A16
115/1/60, NEMA-4
WHT
GND
CONNECTIONS
BLK
WHT
BLK
PUMP
BLK
GND
ELECTRIC DRAIN
WHT
BLK
WHT
BLK
WHT
WHT
WHT
WHT
BLK
BLK
BLK
DRYER ELECTRICAL ENCLOSURE FRONT DOOR
BLK
HIGH TEMP
LIGHT
BLK
BLK
PL
BLK
BLK
LIGHTED
SWITCH
WHT
DRYER ELECTRICAL COMPONENTS
DRYER ELECTRICAL ENCLOSURE
PL
BLK
BLK
BLK
BLK
HTA
BLK
RTS
WHT
BLK
GRN
GRN
GROUND
LUG
GRN
BLK
WHT
WHT
WHT
WHT
WHT
BLK
BLK
GRN
CONNECTIONS
FAN
BLK
BLK
TERMINAL STRIP
CUSTOMER CONNECTION
CONTACTOR
COMPRESSOR
BLK BLK
WHT
BLK
BLK
COMPRESSOR CONNECTIONS
REFER TO DRAWING 550059
FOR ACTUAL COMPRESSOR TYPES
L1 L2
2. MAIN INCOMING POWER DISCONNECT AND FUSING WILL BE PROVIDED BY CUSTOMER.
1. POWER REQUIREMENT PROVIDED BY CUSTOMER TO BE 120VAC.
NOTES:
WHT
HIGH TEMP
ALARM SW
REFRIG
TEMP SW
LIVE WHEN DRYER IS TURNED OFF
SHOCK HAZARD: SOME CIRCUITS MAY BE
AT CUSTOMER SOURCE BEFORE SERVICING
WARNING: DISCONNECT POWER TO DRYER
SEALED
ELECTRICAL
(TYPICAL)
ENCLOSURE
CONNECTIONS IN
WIRING DIAGRAM
D127NC THRU D255NC
115/1/60, NEMA-4
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550058A
WIRING DIAGRAM
D127NC-A16 THRU D255NC-A16
230/1/60, 220/1/50
FOR ACTUAL COMPRESSOR TYPES
REFER TO DRAWING 550059
COMPRESSOR CONNECTIONS
GROUND
BLK
BLK
RED
RED
CONNECTIONS
PUMP
ELECTRIC DRAIN
GND
GRN
RED
GRN
GND
BLK
LUG
RED
RED
RED
RED
BLK
DRYER ELECTRICAL COMPARTMENT FRONT PANEL
HIGH TEMP
LIGHTED SWITCH
RED
BLK
PL
RED
RED
BLK
RED
BLK
RED
PL
LIGHT
DRYER ELECTRICAL COMPONENTS
DRYER ELECTRICAL COMPARTMENT
BLK
HTA
RED
BLK
BLK
BLK
RTS
BLK
CONNECTIONS
SEE NOTE 3
GND
N
L1
L2
BLK
WHT
GRN
RED
GRN
RED
GRN
BLK
FAN
BLK
BLK
COMPRESSOR
CONTACTOR
WIRENUT
BLK
BLK
BLK
RED
RED
RED
RED
BLK
BLK
BLK
BLK
BLK
PLATE LABEL FOR MINIMUM CIRCUIT AMPACITY & MAXIMUM FUSE SIZE.
ALL WIRING TO BE IN ACCORDANCE WITH NEC AND ALL APPLICABLE LOCAL CODES. SEE EQUIPMENT SERIAL
4. FUSED OR CIRCUIT BREAKER DISCONNECT SWITCH TO BE PROVIDED BY OTHERS AND MUST MEET NEC CODE.
POWER CORD CONNECTOR OR OTHER CONNECTION TO BE PROVIDED BY USER.
2. MAIN INCOMING POWER DISCONNECT AND FUSING WILL BE PROVIDED BY CUSTOMER.
3. CUSTOMER POWER CONNECTION MADE WITH A 4 CORD, 16 AWG, 6 FT LONG POWER CORD PROVIDED WITH UNIT.
6. CUSTOMER OPTIONAL CONNECTIONS SHOWN IN SMALL DASHED LINES
1. POWER REQUIREMENT PROVIDED BY CUSTOMER TO BE 200-240VAC 15A. MAXIMUM FULL LOAD CURRENT AT 10A.
NOTES:
5. OPTIONAL EQUIPMENT SHOWN IN DASHED LINES
CUSTOMER POWER CONNECTION MADE WITH A
4 CONDUCTOR, 16 AWG, 6 FT LONG POWER CORD
PROVIDED WITH UNIT. POWER CORD CONNECTOR
OR OTHER CONNECTION TO BE PROVIDED BY USER.
PROVIDED BY OTHERS AND MUST MEET NEC CODE. ALL
WIRING TO BE IN ACCORDANCE WITH NEC AND ALL
APPLICABLE LOCAL CODES. SEE EQUIPMENT SERIAL PLATE
FUSED OR CIRCUIT BREAKER DISCONNECT SWITCH TO BE
LABEL FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM FUSE SIZE.
HIGH TEMP
ALARM SW
TEMP SW
REFRIG
LIVE WHEN DRYER IS TURNED OFF
SHOCK HAZARD: SOME CIRCUITS MAY BE
AT CUSTOMER SOURCE BEFORE SERVICING
WARNING: DISCONNECT POWER TO DRYER
B
(TYPICAL)
GROMMETED
ELECTRICAL
COMPARTMENT
HOLES IN
C
11.0 WIRING DIAGRAMS
WIRING DIAGRAM
D127NC THRU D255NC
230/1/60, 220/1/50
12
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
http://air.irco.com
11.0 WIRING DIAGRAMS
550066A
WIRING DIAGRAM
D127NC-A16 THRU D255NC-A16
230/1/60, 220/1/50, NEMA-4
BLK
GND
CONNECTIONS
BLK
BLK
RED
RED
PUMP
GND
ELECTRIC DRAIN
GRN
RED
BLK
RED
BLK
RED
RED
RED
RED
DRYER ELECTRICAL COMPARTMENT FRONT PANEL
BLK
HIGH TEMP
LIGHT
LIGHTED SWITCH
RED
BLK
PL
RED
RED
BLK
RED
DRYER ELECTRICAL COMPONENTS
DRYER ELECTRICAL COMPARTMENT
PL
BLK
RED
BLK
BLK
BLK
HTA
RTS
GRN
LUG
GROUND
GRN
RED
GRN
BLK
BLK
RED
BLK
RED
RED
RED
BLK
BLK
BLK
COMPRESSOR
CONTACTOR
CONNECTIONS
FAN
BLK
BLK
CUSTOMER CONNECTION
TERMINAL STRIP
BLK
BLK
BLK
BLK
RED
GRN
L1 L2
COMPRESSOR CONNECTIONS
REFER TO DRAWING 550059
FOR ACTUAL COMPRESSOR TYPES
NOTES:
1. MAIN INCOMING POWER DISCONNECT AND FUSING WILL BE PROVIDED BY CUSTOMER.
2. FUSED OR CIRCUIT BREAKER DISCONNECT SWITCH TO BE PROVIDED BY OTHERS AND MUST MEET NEC CODE.
ALL WIRING TO BE IN ACCORDANCE WITH NEC AND ALL APPLICABLE CODES. SEE EQUIPMENT SERIAL
PLATE LABEL FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM FUSE SIZE.
HIGH TEMP
ALARM SW
REFRIG
TEMP SW
LIVE WHEN DRYER IS TURNED OFF
SHOCK HAZARD: SOME CIRCUITS MAY BE
AT CUSTOMER SOURCE BEFORE SERVICING
WARNING: DISCONNECT POWER TO DRYER
CONNECTIONS IN
ELECTRICAL
ENCLOSURE
(TYPICAL)
SEALED
WIRING DIAGRAM
D127NC THRU D255NC
230/1/60, 220/1/50, NEMA-4
13
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
http://air.irco.com
550059
COMPRESSOR WIRING
D127NC-A16, D170NC-A16
D212NC-A16, D255NC-A16
COMPRESSOR
COMPRESSOR RELAY & CAP MOUNTED IN ELECTRICAL BOX
D170NC-A16 CSR TYPE
GRN
BLK
WHT
COMPRESSOR
BLK
RED
GRN
BLK
RED
D212NC-A16 CSR TYPE
3
BLK
230V/1PH/60HZ
CONNECTIONS
COMPRESSOR
C
SR
COMP
OL
1
GND
BLK
RED
START
RUN
WHT
4
4
1
GROUND
5
RELAY AND
2
CAPACITOR
ENCLOSURE
D170NC-A16 CSR TYPE
230V/1PH/60HZ
COMPRESSOR
CONNECTIONS
COMP
C
SR
3
OL
1
BLK
GND
RED
RUN
START
4
5
4
GROUND
1
2
CAPACITOR
COMPRESSOR
RELAY AND
ENCLOSURE
BLK
115V/1PH/60HZ & 110V/1PH/50HZ
ELECTRICAL CONNECTION TO COMPRESSOR
RS
COMP
C
GRN
OL
3
1
BLK
START
WHT
BRN
S
BLU
L
RELAY
RED
GND
GRN
BLK
1
GND
WHT
M
2
COMP
GND
BLK
& 110V/1PH/50HZ
CONNECTIONS
COMPRESSOR
115V/1PH/60HZ
COMP
C
SR
3
OL
1
WHT
WHT
RED
4
4
RUN
START
1
GROUND
BLK
5
BLK
WHT
2
WHT
RELAY AND
ENCLOSURE
CAPACITOR
230V/1PH/60HZ
ELECTRICAL BOX (MTD ON COMPRESSOR)
ELECTRICAL CONNECTION TO COMPRESSOR
D127NC-A16 CSIR TYPE
230V/1PH/60HZ
RED
GRN
BLK
BLK
RED
GROUND
C
COMP
SR
1
OL
3
COMPRESSOR
CONNECTIONS
CSIR TYPE
START
BLK
1
S
2
R
GRN
BLK
RED
OL
115V/1PH/60HZ & 110V/1PH/50HZ
ELECTRICAL BOX (MTD ON COMPRESSOR)
ELECTRICAL CONNECTION TO COMPRESSOR
GROUND
CSIR TYPE
CONNECTIONS
COMPRESSOR
1
SR
COMP
C
1
3
BLK
S
START
2
R
GRN
BLK
WHT
D255NC-A16 CSR TYPE
GROUND
COMPRESSOR
CONNECTIONS
230V/1PH/60HZ
COMP
WHT
BLK
OL
3
SR
C
RED
1
BLK
GRN
RED
BLK
RED
GND
BLK
RUN
ENCLOSURE
CAPACITOR
RELAY AND
COMPRESSOR
START
4
4
5
1
2
220V/1PH/50HZ
115V/1PH/60HZ
110V/1PH/50HZ
D127NC-A16 CSIR TYPE
D212NC-A16 CSIR TYPE
WHT
BLK
BLK
D255NC-A16 CSR TYPE
C
115V/1PH/60HZ
COMPRESSOR
CONNECTIONS
& 110V/1PH/50HZ
RS
COMP
1
BLK
OL
3
GND
WHT
BLK
GRN
CAPACITOR
ENCLOSURE
RELAY AND
COMPRESSOR
WHT
RUN
START
RED
WHT
4
4
GROUND
5
1
WHT
2
D170NC-A16 CSR TYPE
220V/1PH/50HZ
CONNECTIONS
COMPRESSOR
OL
RS
COMP
C
RED
BLK
3
1
4
4
START
RUN
5
1
2
GRN
RED
RED
GND
BLK
BLK
GROUND
ENCLOSURE
RELAY AND
COMPRESSOR
CAPACITOR
GROUND
5
4
D212NC-A16 CSR TYPE
220V/1PH/50HZ
COMP
COMPRESSOR
CONNECTIONS
S
C
OL
3
R
RED
1
BLK
BLK
RED
GRN
RED
GND
BLK
ENCLOSURE
4
RUN
START
1
2
CAPACITOR
COMPRESSOR
RELAY AND
D255NC-A16 CSR TYPE
220V/1PH/50HZ
COMPRESSOR
CONNECTIONS
COMP
S
C
R
3
OL
1
4
RED
RUN
START
GROUND
BLK
4
5
GND
1
2
BLK
RED
GRN
BLK
RED
ENCLOSURE
CAPACITOR
COMPRESSOR
RELAY AND
CAPACITOR
COMPRESSOR
RELAY AND
ENCLOSURE
D127NC-A16 CSR TYPE
220V/1PH/50HZ
COMPRESSOR
CONNECTIONS
SR
COMP
C
3
OL
1
4
4
RED
BLK
5
RUN
START
1
2
GND
GRN
BLK
RED
RED
GROUND
BLK
11.0 WIRING DIAGRAMS
COMPRESSOR WIRING
D127NC, D170NC
D212NC, D255NC
14
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
http://air.irco.com
12.0 GENERAL ARRANGEMENT
AIR OUTLET CONNECTION
1" MPT D127NC-D170NC
1-1/2" MPT D212NC-D255NC
AIR INLET CONNECTION
1" MPT D127NC-D170NC
1-1/2" MPT D212NC-D255NC
SUCTION PRESSURE GAGE
HIGH TEMPERATURE LIGHT
ON-OFF SWITCH WITH
POWER ON LIGHT
29.38
27.38
31.44
1.75 16.00
14.25
.19
35.12
550060
GENERAL ARRANGEMENT
D127NC-A16 THRU D255NC-A16
NEMA-1
FRONT VIEW
RIGHT SIDE VIEW
LEFT SIDE VIEW
TOP VIEW
GENERAL ARRANGEMENT
D127NC THRU D255NC
NEMA-1
15
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
http://air.irco.com
AIR OUTLET CONNECTION
1" MPT D127NC-D170NC
1-1/2" MPT D212NC-D255NC
AIR INLET CONNECTION
1" MPT D127NC-D170NC
1-1/2" MPT D212NC-D255NC
SUCTION PRESSURE GAGE
ON-OFF SWITCH
WITH POWER ON LIGHT
HIGH TEMPERATURE
ALARM LIGHT
29.38
27.38
1.75 TYP 16.00
14.25
.19
31.44
23.56
550061
GENERAL ARRANGEMENT
D127NC-A16 THRU D255NC-A16
NEMA-4
FRONT VIEW
RIGHT SIDE VIEW
LEFT SIDE VIEW
TOP VIEW
A
DETAIL A
12.0 GENERAL ARRANGEMENT
GENERAL ARRANGEMENT
D127NC THRU D255NC
NEMA-4
16
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
http://air.irco.com
13.0 REPLACEMENT PARTS
- D127NC D170NC D212NC D255NC
110/1/60 230/1/60 220/1/50 110/1/60 230/1/60 220/1/50 110/1/60 230/1/60 220/1/50 110/1/60 230/1/60 220/1/50
1 Exchanger Assy 21341674 21341674 21341674 21341674 21341674 21341674 23141666 23141666 23141666 23141666 23141666 23141666
2 Evaporator Assy 21341641 21341641 21341641 21341641 21341641 21341641 23141658 23141658 23141658 23141658 23141658 23141658
3 Glycol Pump 38052262 23141245 23141245 23141245 23141245 23141245 23141245 23141245 23141245 23141245 23141245 23141245
5 Timed Sol. Drain 23141252 23141260 23141260 23141252 23141260 23141260 23141252 23141260 23141260 23141252 23141260 23141260
6 Compressor 23141146 23141153 23141211 23141195 23141294 23141211 23141138 23141120 23141112 23141096 23141104 23141112
7
Compressor
Electronics Kit
23143688 23143696 23143720 23143704 23143712 23143720 23143738 23143746 23145816 23143753 23143761 23145816
8 Condenser 23141344 23141344 23141344 23141344 23141344 23141344 23141344 23141344 23141344 23141344 23141344 23141344
9 Fan Motor 23141419 23140973 23140973 23141419 23140973 23140973 23141419 23140973 23140973 23141419 23140973 23140973
10 Fan Blade 23141351 23141351 23141351 23141351 23141351 23141351 23141351 23141351 23141351 23141351 23141351 23141351
11 Fan Bracket 23141682 23141682 23141682 23141682 23141682 23141682 23141682 23141682 23141682 23141682 23141682 23141682
12 Filter Dryer 23141450 23141450 23141450 23141450 23141450 23141450 23141450 23141450 23141450 23141450 23141450 23141450
13 Gauge (Suction) 23141690 23141690 23141690 23141690 23141690 23141690 23141690 23141690 23141690 23141690 23141690 23141690
14 Switch On/Off 23141310 23141575 23141575 23141310 23141575 23141575 23141310 23141575 23141575 23141310 23141575 23141575
15 Light, (Hi Temp) 23141377 23141385 23141385 23141377 23141385 23141385 23141377 23141385 23141385 23141377 23141385 23141385
16 Tstat (High Temp) 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369
17 Tstat (Operational) 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369 21341369
18 Power Cord 23141013 - - 23141013 - - 23141013 - - 23141013 - -
-
Ambient Filter
Element (OPT/
NEMA 1 Only)
38052437 38052437 38052437 38052437 38052437 38052437 38052437 38052437 38052437 38052437 38052437 38052437
-
Ambient Filter Kit
(OPT/ NEMA 1 Only)
23132434 23132434 23132434 23132434 23132434 23132434 23132434 23132434 23132434 23132434 23132434 23132434
NEMA-4 PARTS - - - - - - - - - - - -
9 Fan Motor 23141427 23141336 23140973 23141427 23141336 23140973 23141427 23141336 23141336 23141427 23141336 23141336
14 Switch On/Off 23141005 23141286 23141286 23141005 23141286 23141286 23141005 23141286 23141286 23141005 23141286 23141286
15 Light 38052080 23140999 23140999 38052080 23140999 23140999 38052080 23140999 23140999 38052080 23140999 23140999
- Lens 38052106 38052106 38052106 38052106 38052106 38052106 38052106 38052106 38052106 38052106 38052106 38052106
- Contactor 38052858 23141062 23141062 38052858 23141062 23141062 38052858 23141062 23141062 38052858 23141062 23141062
- Strainer Ball 23141278 23141278 23141278 23141278 23141278 23141278 23141278 23141278 23141278 23141278 23141278 23141278
PARTS OVERVIEW
D127NC THROUGH D255NC
000000
Spare. Quantities under this heading reflect the number of each item which we recommend be kept on hand for maintenance or repair.
The appropriate quantity for your application will depend on how critical interruptions in service are to your operation.
Class Quantity Suggested for
1 Minimum Domestic service where interruptions in service are acceptable.
2 Average Domestic service where some interruptions in service are acceptable.
3 Maximum Export service or for domestic service where interruptions in service are unacceptable.
17
Nirvana Cycling Refrigerated Dryer 75 through 150 scfm
http://air.irco.com
a
NOTICE
Specification information above accurate at time of publication. Refer to equipment serial label
for actual refrigerant charges and specifications for units.
14.0 ENGINEERING SPECIFICATIONS
MAX MIN CIRCUIT
MODEL NO VOLTS/PH/HZ HP RLA LRA QTY HP RLA LRA TYPE LBS OZ KGS FUSE AMPACITY LBS KGS
D127NC-A16-1 115/1/60 1/3 6.0 29.0 1 1/18 1.80 2.3 R404 1 6 0.625 15 10.2 250 112.9
D127NC-A16-2 230/1/60 1/3 4.0 16.8 1 1/18 0.90 1.2 R404 1 6 0.625 10 6.3 250 112.9
D170NC-A16-1 115/1/60 1/2 9.2 36.0 1 1/18 1.80 2.3 R404 1 14 0.852 20 14.2 300 136.0
D170NC-A16-2 230/1/60 1/2 4.9 25.9 1 1/18 0.90 1.2 R404 2 3 0.994 10 7.5 300 136.0
D212NC-A16-1 115/1/60 3/4 15.0 57.0 1 1/18 1.80 2.3 R404 2 0 0.909 20 13.2 300 136.0
D212NC-A16-2 230/1/60 3/4 6.5 30.0 1 1/18 0.90 1.2 R404 2 0 0.909 15 9.5 300 136.0
D255NC-A16-1 115/1/60 1 15.0 71.0 1 1/18 1.80 2.3 R404 2 3 0.994 20 14.8 300 136.0
D255NC-A16-2 230/1/60 3/4 8.4 34.0 1 1/18 0.90 1.2 R404 2 3 0.994 20 11.8 300 136.0
COMPRESSOR
FANS
REFRIGERANT
WEIGHT
Note: Maximum allowable working pressure on dryers equipped with standard timed drain valve is 230 psig.
Do not operate dryer at pressures greater than 230 psig on units equipped with timed electric drain valve.
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18
Ingersoll-Rand D255NC User manual
- Category
- Air compressors
- Type
- User manual
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