Parker SC80 User manual

Airtek Division
SMART CYCLE / COLD TRAP
REFRIGERATED
AIR DRYERS
OPERATORS MANUAL:
MODELS SC/CT80 — SC/CT3000
SERVICE DEPARTMENT
1-800-451-6023

Table of Contents
Section 1.0 - EQUIPMENT DATA SHEET
Section 2.0 - GETTING STARTED
Section 3.0 - DRYER INSTALLATION
Section 4.0 - CONTROLS
Section 5.0 - SENSORS, CONTROLS & RELAYS
Section 6.0 - START UP PROCEDURE
Section 6.0 - ROUNTINE MAINTENANCE
Section 7.0 - DIAGNOSTIC CODES
Section 8.0 - TROUBLE SHOOTING
Section 9.0 - MAINTENACE SCHEDULE
Section 10.0 - DRAIN SETTING & OPERATION
Section 11.0 - MAINTENANCE CHARTS
Section 12.0 - ASSOCIATED DRAWINGS
Section 13.0 - WARRANTY/PRODUCT REGISRATION

Section 1.0 – EQUIPMENT DATA SHEET
Air Dryer as Built Specifications
S rial No. Model:
DESCRIPTION
e
VALUE UNIT
---------------Dryer Design Max Air Flow SCFM Comments:
-
- --------Dryer Design Max Air PSI PSI/BAR-------
-
-----Dryer Design Max Inlet Temperature ºF/ºC REFRIGERANT
-
-------------------------Supply Voltage VOLT CHARGE: Lbs.
-
----------------------------------Cycle HZ TYPE:
----------------------------------Phase PH FLA: N/A
-
-----------------Number of Compressors RLA: amps
-
- --------Compressor Horse Power HP LRA: amps-------
-
---------------MinimumCircuit Ampacity AMPS
----------------(copper) THHN Wire Size AWG #
-
--------------Fuse / Circuit Breaker Size AMP REPLACEMENT
-
----------------------Nema Starter Size PART# ELEMENT:
QTY:
- --------------------Crankcase Heate--
r
WATTS
---------------Crankcase Heater Voltage VOLT
- ----------------------Number of Fans--
-
-----------------Fan Motor Horse Powe
r
HP
-
-------------------------Max Amp Draw AMPS
----------------(copper) THHN Wire Size AWG #
-
------------------------------Fuse Size AMP
e
nter n/a if not used) Nema Starter Size PART #
-
-----------------------Overload Setting AMPS
- ater Condenser Max Inlet Temperature ºF
- ater Condenser Minimum Inlet Pressure PSI
-----------Control Transformer VA Rating VA
W
W
-
-----Control Transformer Primary Voltage VOLT
-
---Control Transformer Primary Fuse Size AMP Electrical Dwg No.'s
-
- ontrol Transformer Secondary Voltage VOLTS-C
-
C ntrol Transformer Secondary Fuse Size AMPo
-
- frigerant Low PSI Setting PSI/BAR
- ---------Refrigerant High PSI Setting PSI/BAR
------------Re
---
-
---------------Fan Bank #1 PSI Settings PSI/BAR
-
---------------Fan Bank #2 PSI Settings PSI/BAR
---------------Refrigerant Oil PSI Setting PSI/BAR

Section 2.0 - Getting Started
Before unpacking/uncrating your new dryer, inspect the carton/crate
for damage. Note any damage on the freight bill. File notice of
concealed damage if:
(a) there are any dents in the cabinets
(b) the air and drain pipes are not straight
(c) there is any sign of oil on the skid or floor
(d) the refrigerant gauges show NO pressure
File these claims with the carrier immediately!
Otherwise, proceed with unpacking/uncrating the unit.
Environmental & Location Considerations
Following these guidelines will help insure that your new dryer will provide safe and
reliable service.
Unless supplied for special conditions, air cooled dryers must be located in an
area with an ambient temperature between 50…95ºF (10…35ºC) and free
from explosive and corrosive fumes. Three (3) feet (92cm) of space must
be allowed between all open grills, walls, or other objects.
Where ambient temperatures may periodically fall into the 35…50ºF
(1.6…10ºC) range, dryers are equipped with a low ambient fan control.
Dryers for below freezing (31º, -5ºC) ambient temperatures are available with an
optional additional refrigeration condenser bypass valve.
If the dryer is installed in a confined area, an exhaust system must be
provided to eliminate recirculation of hot atmospheric air.
High ambient temperatures affect the outlet dew point of the dryer. For
every 10º of ambient temperature over 95ºF (35ºC) a decrease of 9% of
dryer performance is encountered with air cooled dryers. The unit must not
operate in an ambient of over 115ºF (46ºC). If ambient temperature
conditions are over 95ºF (35º), water cooled dryers are recommended.

Section 3.0 – DRYER INSTALLATION
NEVER work on unit under pressure
NEVER work on unit when power is connected.
DO NOT over pressurize unit.
DO NOT pass air through the unit until it has been stabilized (operating 2 -
15 minutes). The larger the dryer, the longer it takes to stabilize. The
dryer is considered stabilized when the refrigeration suction gauge reads
between 28 to 35 PSI.
Plumbing the Air Lines
The dryers are shipped ready to run. All connections are made to the outside of
the cabinet.
Air piping must be supported independently of the dryer.
Direction of the air flow must be observed for proper
installation. (Fig. 1)
Use unions or flange joints on inlet and outlet pipe connections. (Fig. 2)
If vibration is present, flexible metal hoses must be installed to prevent the
vibration from being transmitted to the dryer.

Install a bypass line and gate valve 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.
Fig. 2
(Models 80- 300)

USE TWO (2) WRENCHES WHEN CONNECTING DRYER TO PIPING. THIS WILL
PREVENT DAMAGE TO INTERNAL AIR LINES.
Electrical Connections
To be performed by a qualified person only. Risk of serious injury or
death.
Before connecting electrical power to the dryer check for correct voltage
and phase at the connection box.
All units must be externally grounded to protect against severe electrical
shock.
Electrical Hookup
MODEL Wire Gauge Wiring
SC/CT 80 - 100 14 Gauge 3 prong cord included
SC/CT 130 - 3000 12 Gauge Hard wire
1. Remove electric box cover from inside unit.
2. Locate the wires.
3. Locate hole on side of box, place and tighten connector, run wires through
connector.
4. Using wire connectors, connect Black to Hot wire, White to Neutral and
Green to Ground wire.
5. Make sure no bare wire is exposed; replace box cover and screw closed.
Wire the dryer separately from the air compressor. The dryer must not
cycle with the air compressor.
Phase rotation is only important if the dryer has a 3 phase condenser
fan. Fans must pull air through condenser coil.
Crankcase heaters are pre-wired at the factory to line side of terminal box or
contactor. Heaters must be energized at all times, therefore the main
disconnect must be left on at all times except when servicing.

Section 4.0 - Controls
REFRIGERANT DRYER CONTROLLER
FEATURES AND OPERATIONS
5 1 4 8
10
2 6 3 7
9

(1) Dew Point Controller and Display. Directly controls dew point and provides
consistent digital display of the dew point. Factory set at 38ºF. During Actual
display mode, displays the dew point temperature from 20ºF to 99ºF or -6ºC to
37ºC. During DP SET mode, the unit displays dew point set points from 36ºF to
50ºF in 2º steps or 1ºC to 10ºC in 1/2º steps. (NOTE – the ones digit decimal
point is used to indicate 1/2º when displaying set point is used in the Celsius
scale). ºC LED indicates the display is in Celsius. ºF LED- indicates the
temperature display in Fahrenheit. ACTUAL LED – shows actual temperature
being measured by system. DP SET LED – INDICATES that the display is in
programming mode during which the set point can be changed and stored. The
dew point display also displays the unit error codes when they occur (See
Diagnostic Codes).
(2) On / Off Button for Load/No Load mode. When LED is on, this indicates
when the unit is in the Load/No Load Mode.
(3) On / Off Button for Thermal Bank Mode. Thermal Bank LED indicates when
the unit is operating the thermal bank mode.
(4) Raise / Lower Buttons. These are used adjust the set point values. The set
point will change once for each time pressed. If the button is pressed and
held, the set point will change one step per second.
(5) Set Button. Toggles between Actual Display mode and Set Point mode.
During the Set Point Display mode, the Raise and Lower keys are used to select
new set points which are stored in non-volatile memory when the mode is set
back to ACTUAL. If no keys are pressed within 15 sec., the mode is
automatically set to ACTUAL. This switch is also used to select the temperature
scale that the unit will operate in by pressing and holding for 15 sec. (The unit
will toggle between ºF and ºC)
(6) Hidden Button. Positioned at the bottom center of the Dew Point window
between the Mode keys. When, pressed, the display will show the external
suction temperature at the expansion bulb. It has no further effect on
operation. It may also be used for other diagnostics and factory test purposes.
(7) Power Saver Active LED. Unit in mode of low power consumption.
Refrigeration system unloaded or in thermal banking condition.
(8) High Dew Point Alarm LED. Indicates that the unit is in High Dew Point
condition. The high dew point alarm light with remote dry contacts, will
activate when the actual dew point is 15ºF higher than the dew point set point.
Any diagnostic code will activate the high dew point alarm immediately.

(9) Drain Control Settings. The DP5050-L series control panel will operate by
either a “Level Float” or “Timed” interval. If the dryer is equipped with a Level
Float (electrical connections to terminal J9), the drain will respond to the float
signal on demand to operate the drain. The duration the drain stays open will
be determined by the length of time it takes the fluid level to drop and rest the
float signal, plus a pre-set time of a few seconds after. The drain valve will also
operate automatically every 30 minutes (independent to the float signal). The
30 minute timed intercal setting can be adjusted down to 1 minute or raised up
to 60 minutes if desired. To adjust the drain, “Timed Interval” setting press the
SET Button twice. The value displayed will be the timed Interval setting. Use
the UP or DOWN Arrow to change the set point. Press the set button again to
return to dew point.
(10) Drain Open LED. Indicates that the drain valve is open.
11
(11) Air Inlet & Outlet PSI Gauges. Indicates that unit is pressurized. Unit
MUST be depressurized and bypassed before any service work is done on air
system. Excessive pressure drop (more than 5 PSIG) across dryer indicates
water may be freezing in the evaporator.

Panel C
12 13 11
(12) High Ambient Temp Display. Should not be above 100ºF. High ambient
temperature can cause head pressure tripping of refrigeration system and could
result in non-warranty damage to refrigeration compressor. This display is
used for water temperature in water cooled units.
(13) High Inlet Temp Display. Should not be above 100ºF. High inlet air temp
can cause overloading of dryer. If lit, check compressed air after cooler and/or
oil cooler on air compressor.
12 13 14
11
(14) High Coalescer PSID & Light. Pressure drop across coalescer element
should not be above 9 PSIG. Excessive pressure drop could cause mechanical
failure of element resulting in flood of oil, water and contaminants downstream
of dryer. Change element when necessary.

Section 5.0 – Sensors, Controls and Relays
Drain Relay (K1) Opens the drain valve according to drain controls.
Suction Relay (K2) Turns on according to the mode and dew point
conditions and opens the suction or liquid line
valve when opened.
Unloader Relay (K3) Turns on according to the modes and dew point
andopenstheunloader valve when active.
Compressor Relay (K4) Controls the compressor according to the mode
and dew point conditions.
High Dew Point Relay (K5) Relay and LED alarm turns on when the dew
point is 15ºF above the set point. This is also
active during any error conditions.
Compressor Unloader #1 Relay (CU1) (FU Panel Only)
Turns on when the dew point is below the set
point +2ºF and turns off when the dew point is
above the set point +2ºF.
Compressor Unloader #1 Relay (CU2) (FU Panel Only)
Turns on when the dew point is below the set
point +4ºF and turns off when the dew point
isabovethesetpoint+4ºF.
Dew point Sensor (Probe 1) Resistive NTC sensor for measuring dew point
temperature.
Suction Temperature Sensor (Probe 2)
Resistive NTC sensor for measuring external
suction temperature at the expansion bulb
(E3Probe)

Section 6.0 – START UP PROCEDURE
There should be NO air flow through the dryer before or during start up. It
is recommended that the dryer be installed with bypass piping to better
service the unit.
SC/CT 80-100
1. Plug in unit.
2. Switch unit on. On / Off switch will light green when unit is running.
3. Unit is ready for operation.
SC/CT 130 – 165
1. After electrical connection (Section 3), apply power.
2. Leave power on for 8 hours before proceeding any further.
3. Remove side panel from unit.
4. Some units are shipped with the refrigeration service valve tagged.
These tagged service valves must not be opened until the dryer is ready
to be started and the main power is permanently applied. Only tagged
service valves must be opened.
5. Locate tagged service valves and remove end cap from valve stem. (Fig.
3)
6. Using a refrigeration service or small crescent wrench, turn the valve stem
counterclockwise until it stops. Occasionally it may be necessary to re-
tighten the packing nut (turn clockwise) if a leak is noticed. The valve will
now be fully opened. (Fig. 3)
7. Replace cap.
8. Switch unit on. On / Off switch will light green when unit is running.

9. If the storage conditions were adverse, the refrigeration compressor may
make a loud may make a loud metallic hammering noise. If this happens,
turn the dryer off at the panel and wait 60 seconds. Then turn the dryer
back on. Repeat this procedure until the refrigeration compressor runs
smoothly. The suction gauge located on the front panel should start to
drop to between 28…35 PSI.
Do not pass air through the dryer until it Is stabilized.
(Suction gauge reads 28…35 PSI)
10.With the dryer turned on from the control panel, and the suction gauge
between 28…35 PSI, you can now introduce compressed air to the dryer.
11.Check the automatic drain for proper operation. Drain should open at
regular intervals based on the drain control settings.
Clean Y-Strainer after the first 8 hours of operation. (If
unit has float Demand drains there is no Y-Strainer)
12. Restart dryer using this procedure after maintenance, power outage or
prolonged periods of shutdown.
When Operating Dryer
1. Turn dryer On and Off at control panel.
2. Keep power to unit during off cycles.
3. Start dryer to prior to allowing air flow through unit.
4. Clean condenser when necessary.
5. Keep ambient temperature under 95ºF (35ºC)
6. Keep inlet temperature under 100ºF (37.7ºC)
7. Keep inlet pressure above 100 PSI (8.6 bars)
8. Check and clean Y-strainer
9. NEVER cycle dryer with air compressor.

Section 7.0 – ROUTINE MAINTENANCE
Routine Maintenance
The air cooled condenser on your dryer must be kept clean. Inspect on a regular
basis for dirt or debris that might accumulate. Remove any debris immediately.
Although the filter on your dryer is connected to a drain timer it is recommended
that the drain and solenoid be checked weekly. The Y-strainer should be checked
monthly. (Fig. 4)
It is not advisable to tamper with the other adjustments unless you
are familiar with refrigeration. The controls interact with each other
and, although the effect of an adjustment may not be immediately
obvious, it will affect the dryer’s performance.
C CH HA AR RG GE E L LI IQ QU UI ID D O ON NL LY Y, , D DO O N NO OT T V VA AP PO OR R! !

 See tag for correct refrigerant charge. See tag for correct refrigerant charge.

 Unit needs to be pulled into vacuum 500 micron (minimum) Unit needs to be pulled into vacuum 500 micron (minimum)

 The full charge might not be accepted. If this occurs, the unit
can
be started and then the remainder of the charge should be
slowly
metered into the suction side (Suction side is always the
inlet
to compressor side).
The full charge might not be accepted. If this occurs, the unit
can be started and then the remainder of the charge should be
slowly metered into the suction side (Suction side is always the
inlet to compressor side).

 The unit needs to maintain a suction pressure between 28…35
PSI
with no air load. If the full charge has been applied and
suction
pressure is too high, see Adjustments in Section 5.
The unit needs to maintain a suction pressure between 28…35
PSI with no air load. If the full charge has been applied and
suction pressure is too high, see Adjustments in Section 5.

Section 8.0 – TROUBLE SHOOTING
C
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Section 9.0 – MAINTENANCE SCHEDULE
The maintenance chart below indicates the components that should be checked while performing routine
maintenance on the dryer. The chart also indicates how often a specific check should be done
REFRIGERATED
SERIES MAINTENANCE SCHEDULE
TIME WEEKLY MONTHLY
BI-
ANNUALLY ANNUALLY
Coalescing Filter Element Check Replace
Condensing Coil (AC units) Check/Clean Check/Clean Check/Clean Check/Clean
Condenser (WC units) Check/Clean**
Drain Line Y-Strainer Check/Clean Check/Clean Check/Clean Check/Clean
High Pressure Switch Check Check Check
Low Pressure Switch* Check Check Check
Fan Control Switches (AC
units) Check Check Check
Compressor Oil Level Check Check Check Check
Drain Solenoid Check/Clean Check/Clean Check/Clean
*The low pressure switch may require more frequent adjustments depending on the ambient conditions.
** The condenser should be cleaned only if the unit is running abnormally high discharge pressure.
Contact the factory for verification prior to proceeding with this maintenance item.
MAINTENANCE PROCEDURES
Before performing any maintenance on the machine ensure that air pressure is vented from
the system. Also make sure that personnel performing the maintenance have read the
maintenance section of the manual.
Some of the maintenance tasks will require the refrigeration system to run, but when not
required, turn the unit off before proceeding.
Upon completion of the maintenance tasks be sure that the machine has been properly
reassembled prior to restarting and reintroducing air.
ROUTINE MAINTENANCE
This section covers the various components that require periodic maintenance and/or replacement.
Coalescing Filter Element
The coalescing filter element should be check Bi-Annually. On units with the standard control panel,
check the pressure drop across the unit by using air pressure gauges upstream and downstream of the
dryer using the closest possible gauges to the dryer. If it is determined that there is a high pressure
drop across the machine, remove the filter element from the machine and inspect it. If the filter is dirty,

replace it. Ensure that air pressure is removed from the machine prior to removing the filter element.
On units that have the Control Center option installed the filter differential can be checked on the control
board.
The coalescing element should be changed annually. To change the filter element:
•Remove the bolts that secure the filter housing cover.
•Remove the wing nut that secures the filter cap to the element.
•Remove the filter cap.
•Remove the existing element from the housing.
•Install the replacement element.
•Reinstall the filter cap and wing nut
•Reinstall the filter cover.
Condensing Coil (Air Cooled Units)
The condensing coil should be cleaned weekly. Ensure that air pressure is removed from the system
prior to cleaning the condenser. The condenser can be cleaned by using a vacuum or compressed air. If
the condenser is not clean after it is blown out with compressed air or vacuumed contact the factory for
assistance.
Condenser (Water Cooled Units)
The water cooled condenser should be checked and cleaned annually if necessary. To check the
condenser, water flow to the condenser should be shut off, air flow to the machine should be shut off,
and the unit should be taken out of a run mode. The end bonnets then need to be removed exposing
the tube side of the condenser. The tube side should be inspected for any debris and cleaned. If soft
deposits are found they can be cleaned using a pneumatic tube cleaning gun which forces plugs down
the tubes. Some have a brush between two rubber plugs and others are specially designed plugs which
scrape the tube walls as they travel down the tube. If scale is found special equipment is required to
clean the tubes. These cleaning systems utilize a flexible shaft which rotates a brush as it is fed down
the tube, they can also simultaneously flush out the tubes with water. There is a wide variety of
brushes and tools available that attach to the shaft to clean both soft and hard deposits.
Drain Line Y-Strainer
The drain line y-strainer should be cleaned weekly. Air flow and air pressure should be removed from
system before proceeding. To clean the y-strainer:
•Turn the ball valve on the strainer assembly to the closed position
•Remove threaded cap at the end of the ball valve assembly.
•Clean the screen inside of the cap by rinsing it under water.
•Reinstall the screen and cap
•Return the ball valve to the open position
High Pressure, Low Pressure, & Fan Control (AC units only)
The refrigeration pressure switches should be checked monthly to ensure that they are adjusted to the
proper settings. Please refer to the applicable electrical drawings for your unit.

Compressor Oil Level
The oil level in the compressor should be checked daily. The refrigeration system should never need oil
unless the system is leaking or has been recently repaired. If it is determined that the system needs oil,
do the following:
•Run the dryer for a minimum of 2 minutes, if there is not a visible level of oil in the sight glass,
proceed to the next step, if there is DO NOT add oil to the system.
•Using the appropriate oil pump add the proper oil (POE for R404 refrigerant) using the Schrader
valve on the suction side of the compressor.
•Add oil until there is a visible level in the sight glass with the compressor running.
Section 10.0 – DRAIN SETTING & OPERATION
The drain can be actuated in one of three ways. First, when power is applied to the timer, the timer will
immediately put power to the valve for the amount of time indicated by the “On Time” dial. Removing
and reapplying power will again actuate the timing cycle.
Second, pushing the test button will actuate the valve for as long as the button is pressed.
Third, once the timer is plugged in, the timing cycle will begin. The valve will be actuated at the interval
of time that is indicated by the setting of the knob for the off time.
To set:
1. Fully drain the dryer by opening an auxiliary gate valve, or push the test button on the timer.
2. When all the condensate has drained, set the off time to the maximum 60 minute setting and
the on time to the maximum 15 second setting.
4. Return prior to the time the drain is expected to open and check to see how long
long it takes for the valve to exhaust the liquid. If at the end of the drain opened period,
all the liquid has not been expelled, shorten the off time cycle and repeat steps 3, 4 and 5.
5. The drain should be checked periodically to ensure a proper setting was achieved. In
climates with large changes in humidity, the drain should be checked and reset accordingly.

Section 11.0 – MAINTENANCE CHARTS
Maintenance Log
Date Service Performed Parts Replaced Initials