Champion CRH 20 User manual

1
SERVICE DEPARTMENT: [phone]
Contents
1.0 INSTALLATION ....................................................... 2
2.0 OPERATION ........................................................... 3
3.0 MAINTENANCE ..................................................... 4
TROUBLESHOOTING GUIDE ........................................... 6
SPECIFICATIONS ......................................................... 7-8
ELECTRICAL SCHEMATICS .............................................. 9
DIMENSIONS AND WEIGHTS................................... 10-12
PARTS LIST ............................................................. 13-14
WARRANTY ................................................................. 16
GENERAL SAFETY INFORMATION
1. Pressurized devices
This equipment is a pressure containing device.
• Do not exceed maximum operating pressure as
shown on equipment serial number tag.
• Make certain equipment is depressurized before
servicing.
2. Electrical
This equipment requires electricity to operate.
• Install equipment in compliance with national and
local electrical codes.
• Standard equipment is supplied with NEMA 1
electrical enclosures and is not intended for
installation in hazardous environments.
• Disconnect power supply to equipment when per-
forming any electrical service work.
3. Breathing air
• Air treated by this equipment may not be suitable
for breathing without further purification. Refer to
OSHA standard 1910.134 for the requirements for
breathing quality air.
7610.724.25B 10/01
CA18-2-635
CRH SERIES HIGH INLET TEMPERATURE
REFRIGERATED DRYERS
MODELS: CRH20, CRH25, CRH35, CRH50,
CRH75, CRH100, AND CRH125
INSTRUCTION MANUAL

2
2. Location in the compressed air system
A. Maximum working pressure - 175 psig,
12.3 kgf/cm2. Do not exceed unit’s Maximum Working
Pressure.
1) For maximum capacity, install unit in air system at
highest pressure possible (e.g. before pressure
reducing valves)
2) For maximum capacity, install unit at coolest
compressed air temperature possible. Maximum
inlet compressed air temperature: 180°F, 82°C. If
inlet air exceeds this temperature, precool the air
by extending the piping between the compressor
and the dryer.
B. Air Outlet - Connect air outlet to downstream air lines.
C. By-pass piping - If servicing the unit without interrupt-
ing the air supply is desired, piping should include inlet
and outlet isolation valves and an air by-pass valve.
D. Condensate drain - It is advisable to connect drain
outlet to the condensate drainage system.
NOTE: Drain discharge is at system pressure. Drain line
should be anchored to prevent whipping.
1.4 Electrical connections
A. Dryer is designed to operate on power supply (volt-
age) listed on serial number tag located on the back of
the dryer.
B. Dryer is supplied with an electrical cord. Install in
receptacle of proper voltage.
NOTE: Models 50 and 75 (115v only) - Install plug
in receptacle rated for 20 amps. Units are
supplied with 20 amp plug.
NOTE: Refrigeration system is designed to run continu-
ously and should NOT be wired to cycle on/off with the air
compressor.
IO
Serial Number
Tag
Ambient Air Filter
Electrical
Connection
Control
Panel
Air Inlet
Connection
Serial
Number
Tag
Drain
Connection Air Outlet
Connection
Separator and
Integral Filter
Left Side Front BackRight Side
Strainer
(shipped
separately)
Drain
Mechanism
Pipe Nipple
1.0 INSTALLATION
1.1 Location
A. Air compressor intake - Locate air compressor so that
contaminants potentially harmful to the dryer are not
drawn into the air system.
B. Free air flow - Do not block either side of the cabinet.
Observe minimum installation clearances as shown.
1.2 Mounting
Dryer is suitable for floor or shelf mounting.
1.3 Piping connections
A. Air Inlet - Connect compressed
air line from air compressor to
air inlet using strainer supplied.
1. Install strainer (included in
shipping carton) prior to
dryer inlet using pipe nipple
supplied or other piping as
required.
NOTE: Observe flow direction arrows on strainer.
NOTE: Install strainer where it is easily accessible for
cleaning.
NOTE: Use vibration dampener, if vibration exists in air line
at inlet to dryer.
24"
12"
wall 0"
36"
Plug

3
2.0 OPERATION
NOTE: Installations above 6000 feet, 1825 meters
Unit is adjusted to operate in altitudes up to 6000 feet,
1825 meters. If unit is installed in an altitude above this,
and has not been preset at the factory for this altitude,
contact Manufacturer’s Service Department.
2.1 Start-up
Start refrigeration system by pushing the on/off switch to
the ON position (depress rocker switch on side marked
“I”).
NOTE: The fault light may illuminate when unit is ener-
gized. Light should go out approximately 5 minutes
after start-up. If light remains lit after 30 minutes or
illuminates after going out, refer to Troubleshooting
Guide.
2.2 Operating check points
Check the following on a periodic basis:
A. Rocker switch is in the ON position.
B. Amber fault light is out.
C. Condensate is being regularly discharged.
2.3 Minimum/maximum operating conditions
A. Minimum/Maximum air pressure: 20/175 psig,
1.4/12.3 kgf/cm2
B. Maximum inlet air temperature: 180°F, 82 °C
C. Minimum/Maximum ambient temperature:
35/110°F, 2/43°C
Control Panel
2. For dryers with an aftercooler installed upstream
Flow capacity in scfm (m3/min) @ 100°F, 38 °C inlet
temperature, 100°F, 38°C inlet pressure dew point,
100°F, 38 °C ambient temperature, 50°F, 10°C outlet
pressure dew point, and less than 10 psi, 0.7 kgf/cm2
pressure drop.
175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
20 23 (0.65) 22 (0.62) 20 (0.57) 18 (0.51)
25 29 (0.82) 27 (0.76) 25 (0.71) 23 (0.65)
35 41 (1.16) 38 (1.08) 35 (0.99) 32 (0.91)
Model 50 58 (1.64) 54 (1.53) 50 (1.42) 45 (1.27)
75 87 (2.46) 81 (2.29) 75 (2.12) 68 (1.93)
100 116 (3.29) 108 (3.06) 100 (2.83) 91 (2.58)
125 145 (4.12) 135 (3.82) 125 (3.54) 114 (3.23)
D. Maximum flow capacity
1. For dryers without an aftercooler installed upstream
Flow capacity in scfm (m3/min) @ 180°F, 8 2 °C inlet
temperature, 160°F, 71°C inlet pressure dew point,
95°F, 35 °C ambient temperature, 50°F, 1 0 °C outlet
pressure dew point, and less than 5 psi, 0.35 kgf/cm2
pressure drop.
175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
20 20 (0.57) 18 (0.51) 17 (0.48) 15 (0.42)
25 24 (0.68) 23 (0.65) 21 (0.59) 19 (0.54)
35 31 (0.88) 29 (0.82) 27 (0.76) 24 (0.68)
Model 50 58 (1.64) 54 (1.53) 50 (1.42) 45 (1.27)
75 71 (2.01) 66 (1.87) 61 (1.73) 55 (1.56)
100 97 (2.75) 90 (2.55) 83 (2.35) 76 (2.15)
125 121 (3.43) 112 (3.17) 104 (2.95) 95 (2.69)
50 HZ
60 HZ
60 HZ
50 HZ
Inlet Pressure
psig (kgf/cm2)
Inlet Pressure
psig (kgf/cm2)
175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
20 32 (0.91) 30 (0.85) 28 (0.79) 25 (0.71)
25 40 (1.13) 37 (1.05) 34 (0.96) 31 (0.88)
35 55 (1.56) 51 (1.44) 47 (1.33) 43 (1.22)
Model 50 78 (2.21) 73 (2.07) 67 (1.90) 61 (1.73)
75 118 (3.34) 110 (3.12) 102 (2.89) 92 (2.61)
100 157 (4.45) 146 (4.14) 136 (3.85) 123 (3.48)
125 197 (5.58) 183 (5.18) 170 (4.82) 155 (4.39)
Inlet Pressure
psig (kgf/cm2)
175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
20 27 (0.76) 25 (0.71) 23 (0.65) 21 (0.59)
25 33 (0.93) 31 (0.88) 29 (0.82) 26 (0.74)
Model 35 43 (1.22) 40 (1.13) 37 (1.05) 33 (0.93)
50 78 (2.21) 73 (2.07) 67 (1.90) 61 (1.73)
75 96 (2.72) 90 (2.55) 83 (2.35) 75 (2.12)
100 131 (3.71) 122 (3.46) 113 (3.20) 102 (2.89)
125 164 (4.65) 152 (4.31) 142 (4.02) 129 (3.65)
Inlet Pressure
psig (kgf/cm2)
I
O
On/Off Switch Fault Light

4
3.0 MAINTENANCE
DRYER IS A PRESSURE CONTAINING DEVICE.
DEPRESSURIZE BEFORE SERVICING.
3.1 Ambient air filter - Clean accumulated dust and dirt
from ambient air filter monthly or more often if air
flow across the condenser is impeded.
A. Remove top panel.
B. Remove ambient air filter by sliding upwards.
C. Wash with soap and water and allow to dry before re-
installing.
NOTE: Do not use solvents to clean ambient air filter.
D. Reinstall filter and top panel.
3.2 Inlet strainer - clean inlet strainer monthly or more
often if rapid clogging occurs.
A. Shut-off compressed air supply to the strainer
and depressurize.
B. Remove screen and clean or replace.
C. Reinstall.
Screen
3.3 Replace separator/filter element yearly or
more often if pressure drop across the dryer
is excessive.
A. Shut-off compressed air supply to the dryer and
depressurize.
B. Remove top panel.
C. Remove two screws holding side panel and remove
side panel by sliding upwards.
D. Disconnect drain tube from bulkhead fitting
in cabinet base. To remove, press the plastic
collar in, toward the fitting, while pulling the tube out
of the fitting.
E. Remove bowl - push bowl up, turn bowl 1/8th turn to
your left, and pull straight down.
F. Clean filter bowl.
G. Replace element.
1. Replacing complete element
a) Pull off old element and discard.
b) Make certain O-ring inside top of
replacement element is in place and push
element onto filter head.
2. Replacing sleeve only
a) Pull element straight down to remove.
b) Remove bolt and bottom cap and remove
disposable filter sleeve.
c) Clean separator core with soap and water
if necessary
d) Slide new filter sleeve over separator core and
replace bottom cap and hand tighten bolt.
e) Make certain O-ring inside top of element is in
place and push element onto filter head.

5
H. After making sure that O-ring and wave spring inside
top of bowl are in place, reassemble bowl to head.
NOTE: Make certain O-ring is generously lubricated
NOTE: Wave spring ends should be pointed down
to prevent the wave spring from interfering
with reassembly.
I. Reconnect drain tube to bulkhead fitting by pushing
tube into fitting until it locks in position.
J. Reinstall side and top panels.
K. Repressurize dryer and resume operation.
Element o-ring Separator Element
Bowl o-ring
Drain Mechanism
Wave Spring
Tube
Hose
Barb
3.4 Automatic condensate drain
• Check daily to be sure automatic drain is
discharging.
• Replace drain mechanism yearly.
A. Shut-off compressed air supply to the dryer
and depressurize.
B. Remove top panel.
C. Remove two screws holding side panel then
remove side panel by sliding upwards.
D. Disconnect drain tube from bulkhead fitting in
cabinet base. To remove, press the plastic collar in,
toward the fitting, while pulling the tube out of the
fitting.
E. Remove bowl - push bowl up, turn 1/8th turn to
your left, and pull bowl straight down.
F. Remove drain tube fitting from bottom of bowl.
G. Remove old drain mechanism by turning knurled
fitting to the right (clockwise) and remove.
H. Install new drain mechanism. If necessary, use a
wire or pencil to guide the new mechanism into
place.
I. Reassemble drain tube fitting to bowl.
J. After making sure that large O-ring in filter head is
in place, reassemble bowl to head.
K. Reconnect drain tube to bulkhead fitting by
pushing tube into fitting until it locks in position.
L. Reinstall top and side panels.
M. Repressurize dryer and resume operation.

6
TROUBLESHOOTING GUIDE
C) Fault Alarm
A) Water downstream of dryer 1. Residual free moisture remaining in
downstream pipelines
2. Air by-pass system is open
3. Inlet and Outlet connections are
reversed
4. Temperatures surrounding air lines
downstream of dryer have dropped
below dryers dew point rating.
5. Excessive free moisture (bulk liquid)
at dryer inlet
6. Condensate not being automatically
drained
Drain mechanism is clogged or
inoperative.
Drain line is restricted or frozen.
7. Dryer overloaded resulting in
elevated dew point.
8. Refrigeration system not functioning
properly resulting in elevated dew
point.
1. Inlet air strainer clogged
2. Excessive air flow
3. Separator filter clogged.
4. Freezing of moisture in evaporator
because of refrigeration system
improperly functioning.
1. Dryer overloaded resulting in high
air outlet temperature.
2. Refrigeration system not function-
ing properly resulting in high air
outlet temperature.
3. Unit functioning normally but
thermostatic switch is malfunction-
ing or not securely mounted.
Blow out system with dry air
Check valve positions
Check for correct connection
Insulate or heat trace air lines exposed
to low ambients or dry air to lower
dew point
Install separator ahead of dryer
B) High pressure drop across dryer
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
Replace drain mechanism if inoperative
Open drain line
Check inlet air temperature and
pressure, flow rate (compressor
capacity) and ambient air temperature
See D below
Clean inlet air strainer
Check flow rate
Replace filter sleeve
See D below
See A 7
See D below
Contact qualified refrigeration repair-
man or manufacturer’s service depart-
ment
Check power to unit
Close disconnect switch
Check for continuity
Have electrician check electrical
connections
Check minimum/maximum tempera-
ture ranges
Clean ambient air filter
Clean condenser
Replace fan motor or fan control
switch
Contact qualified refrigeration repair-
man or manufacturer's service depart-
ment
Check wiring
D) Refrigeration system not
functioning properly
1. When dryer on/off switch in on or
"I" position
2. Refrigerant compressor cycles on
and off
a. Power failure
b. Line disconnect switch open
c. Blown fuses, open breaker
d. Faulty wiring, loose terminals
a. High or low ambient conditions
b. Ambient air filter clogged
c. Condenser fins clogged
d. Fan motor or fan control switch
malfunction
e. Refrigerant leak
f. Low voltage

7
SPECIFICATIONS - Models 20 thru 75
Description Model
20 25 35 50 75
Operating Conditions
Rated Capacity scfm 60 / 50 Hz 20 / 17 25 / 21 35 / 27 50 / 50 75 / 61
@125 psig, 8.8 kgf/cm2*m
3/min 60 / 50 Hz 0.57 / 0.48 0.71 / 0.59 0.99 / 0.76 1.42 / 1.42 2.12 / 1.7
Maximum Working Pressure 175 psig (12.3 kgf/cm2)
Maximum Inlet Temperature 180°F (82°C)
Min/Max. Ambient Temperature 35-110°F (2-43°C)
Pressure Drop @ psi 60 / 50 Hz 4.5 / 2.9 3.3 / 2.4 4.7 / 2.9 4.5 / 4.5 3.8 / 2.2
rated capacity (kgf/cm2)60 / 50 Hz (0.32 / 0.20) (0.23 / 0.17) (0.33 / 0.20) (0.32 / 0.32) (0.27 / 0.15)
Refrigeration System Data
Compressor Type Hermetic, Rotary, Permanent Split Capacitor
BTU/HR - Refrigeration Only
@ ASRE-T Conditions 60 / 50 Hz 6800 / 5500 6800 / 5500 6800 / 5500 12850 / 10100 12850 / 10100
Outlet Air Temperature
(nominal @ rated conditions) 155°F (68°C)
Refrigerant Type R-407C
Refrigerant Charge oz (grams) 60 / 50 Hz 11.0 (312) 12.0 (340) 12.0 (340) 18.0 (510) 20.5 (581)
Suction Pressure Setting 67 psig (4.7 kgf/cm2)
Factory Test (design) Pressure
high side/low side 330/178 psig (23.2/12.5 kgf/cm2)
Condenser Fan Switch Setting (in-out) 240-180 psig (16.9-12.7 kgf/cm2)
Air Flow Across Condenser cfm 60 / 50 Hz 280 / 235 280 / 235 280 / 235 620 /515 620 / 515
(m3/min) 60 / 50 Hz (7.9 / 6.7) (7.9 / 6.7) (7.9 / 6.7) (17.6 / 14.6) (17.6 / 14.6)
Electrical Data
Unit 115/1/60
VAC/phase/Hz 115/1/60
Minimum/maximum volts 98-127
Full Load AmpS (FLA) 7.9 7.9 7.9 13.0 13.0
Branch Circuit Fuse Size (amps) 15 15 15 20 20
Compressor
Volts/phase/Hz 115/1/60
Rated Load amps (RLA) 6.7 6.7 6.7 11.1 11.1
Locked Rotor amps (LRA) 37.0 37.0 37.0 63.0 63.0
Watts (input) 645 645 645 1250 1250
Overload Thermal and Current (Auto Reset)
Condenser fan motor
Volts/phase/Watts (output) 115/1/25 115/1/25 115/1/25 115/1/35 115/1/35
Full Load Amps (FLA) 1.2 1.2 1.2 1.6 1.6
Other Loads
Volts/amps/Watts 115/0.002/0.2 115/0.002/0.2 115/0.002/0.2 115/0.002/0.2 115/0.002/0.2
Unit 220-240/1/50
VAC/phase/Hz 220-240/1/50
Minimum/maximum volts 198-264
Full Load Amps (FLA) 3.5 3.5 3.5 6.0 6.0
Branch Circuit Fuse Size (amps) 15 15 15 15 15
Compressor
Volts/phase/Hz 220-240/1/50
Rated Load amps (RLA) 2.9 2.9 2.9 5.1 5.1
Locked Rotor amps (LRA) 14.0 14.0 14.0 28.0 28.0
Watts (input) 540 540 540 990 990
Overload Thermal and Current (Auto Reset)
Condenser fan motor
Volts/phase/Watts (output) 220-240/1/18.3 220-240/1/18.3 220-240/1/18.3 220-240/1/25.6 220-240/1/25.6
Full Load Amps (FLA) 0.6 0.6 0.6 0.8 0.8
Other Loads
Volts/amps/Watts 220-240/0.002/0.4 220-240/0.002/0.4 220-240/0.002/0.4 220-240/0.002/0.4 220-240/0.002/0.4
* Capacity @ 180°F, 82°C inlet temperature, 160°F, 71°C inlet pressure dew point, 95°F, 35°C ambient temperature, 50°F, 1 0 °C outlet
pressure dew point, and less than 5 psi, 0.35 kgf/cm2pressure drop.

8
SPECIFICATIONS -Models 100 and 125
Description Model
100 125
Operating Conditions
Rated Capacity scfm 60 / 50 Hz 100 / 83 125 / 104
@125 psig, 8.8 kgf/cm2*(m
3/min) 60 / 50 Hz (2.83 / 2.35) (3.54 / 2.95)
Maximum Working Pressure 175 psig (12.3 kgf/cm2)
Maximum Inlet Temperature 180°F (82°C)
Min/Max. Ambient Temperature 35-110°F (2-43°C)
Pressure Drop @ psi 60 / 50 Hz 3.5 / 2.6 4.6 / 3.1
rated capacity (kgf/cm2)60 / 50 Hz (0.25 / 0.18) (0.32 / 0.22)
Refrigeration System Data
Compressor Type Hermetic, Rotary,Permanent Split Capacitor
BTU/HR - Refrigeration Only
@ ASRE-T Conditions 60 / 50 Hz 25100 / 20385
Outlet Air Temperature
(nominal @ rated conditions) 155°F (68°C)
Refrigerant Type R-407C
Refrigerant Charge oz (grams) 60 / 50 Hz 30 (851) 31 (880)
Suction Pressure Setting 67 psig (4.71 kgf/cm2)
Factory Test (design) Pressure
high side/low side 315/163 psig (22.2/11.5 kgf/cm2)
Condenser Fan Switch Setting (in-out) 240-180 psig (16.9-12.7 kgf/cm2)
Air Flow Across Condenser cfm 60 / 50 Hz 830 / 690
(m3/min) 60 / 50 Hz (23.5 / 19.5)
Electrical Data
Unit 208-230/1/60
VAC/phase/Hz 230/1/60
Minimum/maximum volts 187-253
Full Load Amps (FLA) 13.3
Branch Circuit Fuse Size (amps) 20
Compressor
Volts/phase/Hz 208-230/1/60
Rated Load amps (RLA) 12.2
Locked Rotor amps (LRA) 65.8
Watts (input) 2390
Overload Thermal and Current (Auto Reset)
Condenser fan motor
Volts/phase/Watts (output) 230/1/60
Full Load Amps (FLA) 1.1
Other Loads
Volts/amps/Watts 230/0.002/0.4
Unit 220-240/1/50
VAC/phase/Hz 220-240/1/50
Minimum/maximum volts 198-264
Full Load Amps (FLA) 10.7
Branch Circuit Fuse Size (amps) 15
Compressor
Volts/phase/Hz 220-240/1/50
Rated Load amps (RLA) 9.6
Locked Rotor amps (LRA) 48.5
Watts (input) 1990
Overload Thermal and Current (Auto Reset)
Condenser fan motor
Volts/phase/Watts (output) 230/1/50
Full Load Amps (FLA) 1.1
Other Loads
Volts/amps/Watts 220-240/0.002/0.4
* Capacity @ 180°F, 82°C inlet temperature, 160°F, 71°C inlet pressure dew point, 95°F,
35°C ambient temperature, 50°F, 10°C outlet pressure dew point, and less
than 5 psi, 0.35 kgf/cm2pressure drop.

9
ELECTRICAL SCHEMATICS
Models 20 thru 75 - All Voltages
Only Models 50 and 75 - 115-1-50/60
Only Models 50 and 75 - 115-1-50/60
3
LINE
SW
G
1
2
3
3
4
A
TEMPERATURE
FPS
8
FM
CONDENSER
FAN MOTOR
4
RC
HTS
7
5
M
LT
R
C S
6
REFRIGERANT
COMPRESSOR
4
4
HIGH
4
WIRING SCHEMATIC
Models 100 and 125 - All Voltages
FPS
TB
HTS
FM
OLT
LT
SW
M
Front of Dryer
(Outside) Right Side of Dryer
(Inside)
COMPONENT LOCATIONS
RC
Models 20 thru 125 - All Voltages
LT
SW
FPS
CT
HTS
FM
OLT
M
RC
Front of Dryer
(Outside) Right Side of Dryer
(Inside)
COMPONENT LOCATIONS
LEGEND
SW - On/Off Switch
OLT - Thermal Overload
M - Compressor Motor
RC - Run Capacitor
HTS - High Temperature Switch
LT - Fault Light
FPS - Fan Pressure Switch
FM - Fan Motor
TB - Terminal Block
CT - Contactor w/115V Coil
Only Models 50 and 75 - 115-1-50/60
TEMPERATURE
CONDENSER
FAN MOTOR
REFRIGERANT
COMPRESSOR
HIGH
NEMA 5-20P
PLUG 20A, 125V

10
DIMENSIONS AND WEIGHTS
Models 20, 25, 35
Model Weight
20 79 lbs (36 kg)
25 80 lbs (36 kg)
35 81 lbs (37 kg)
718 mm
317 mm
105 mm
1.9/16 "
40 mm
5 mm
217 mm
1" 25 mm
6 mm
257 mm
5.1/16 "
128 mm
257 mm
216 mm
41 mm
130 mm
105 mm
287 mm
1.1/2"
38 mm
168 mm
21 mm
327 mm