FScurtis RNH Series User manual

3227484
Rev. F
AUGUST 2012
RNH SERIES
HIGH TEMPERATURE REFRIGERATED DRYERS
OPERATOR
MANUAL
RNH20 RNH25 RNH35
RNH50 RNH75 RNH100
RNH125

2
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elec-
trical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purication.Referto
OSHAstandard1910.134fortherequirementsfor
breathing quality air.

3
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
2. Location in the compressed air system
A. Maximumworkingpressure-250psig,
17.6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com-
pressed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(voltage)
listedonserialnumbertaglocatedonthebackofthe
dryer.
B. Dryerissuppliedwithanelectricalcord.Installinre-
ceptacleofpropervoltage.
NOTE:Models50and75(115vonly)-Installplug
inreceptacleratedfor20amps.Unitsaresup-
plied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.
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ow-Donotblockeithersideofthecabinet.
Observe minimum installation clearances as shown.
1.2 Mounting
Dryerissuitableforoor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owdirectionarrowsonstrainer.
NOTE:Installstrainerwhereitiseasilyaccessibleforclean-
ing.
NOTE:Usevibrationdampener,ifvibrationexistsinairline
at inlet to dryer.
24"
12"
wall
6"
36"
Plug

4
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illumi-
nates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:20/250psig,
 1.4/17.6kgf/cm2
B. Maximuminletairtemperature:180°F,82°C
C. Minimum/Maximumambienttemperature:
 40/110°F,4/43°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.
D. Maximumowcapacity
1. Fordryerswithoutanaftercoolerinstalledupstream.
Flowcapacityinscfm(m3/min)@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/cm2
pressure drop.
I
O
On/Off Switch Fault Light
60 HZ
Inlet Pressure
psig (kgf/cm2)175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
Model
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)
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)
50 HZ
Inlet Pressure
psig (kgf/cm2)175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
Model
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)
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)
60 HZ
Inlet Pressure
psig (kgf/cm2)175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
Model
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)
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)
50 HZ
Inlet Pressure
psig (kgf/cm2)175 (12.3) 150 (10.6) 125 (8.8) 100 (7.0)
Model
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)
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)

5
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 of-
ten if air flow across the condenser is impeded.
A. Removetoppanel.
B. Removeambientairlter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lter.
D. Reinstalllter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de-
pressurize.
B. Removetoppanel.
C. Removetwoscrewsholdingsidepanelandremove
side panel by sliding upwards.
D. Disconnectdraintubefrombulkheadttingin
cabinetbase.Toremove,presstheplasticcollarin,
towardthetting,whilepullingthetubeoutofthe
tting.
E. Removebowl-pushbowlup,turnbowl1/8thturnto
yourleft,andpullstraightdown.
F. Cleanlter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lter
head.
2. Replacingsleeveonly
 a) Pullelementstraightdowntoremove.
b) Removeboltandbottomcapandremovedispos-
ableltersleeve.
c) Cleanseparatorcorewithsoapandwaterifnec-
essary
d) Slidenewlter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lterhead.

6
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pre-
ventthewavespringfrominterferingwithreassembly.
I. Reconnectdraintubetobulkheadttingbypushing
tubeintotting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discharg-
ing.
• Replacedrainmechanismyearly.
A. Shut-offcompressedairsupplytothedryerandde-
pressurize.
B. Removetoppanel.
C. Removetwoscrewsholdingsidepanelthenremove
side panel by sliding upwards.
D. Disconnectdraintubefrombulkheadttingin
cabinetbase.Toremove,presstheplasticcollarin,
towardthetting,whilepullingthetubeoutofthe
tting.
E. Removebowl-pushbowlup,turn1/8thturntoyour
left,andpullbowlstraightdown.
F. Removedraintubettingfrombottomofbowl.
G. Removeolddrainmechanismbyturningknurled
tting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ttingtobowl.
J. AftermakingsurethatlargeO-ringinlterheadis
inplace,reassemblebowltohead.
K. Reconnectdraintubetobulkheadttingbypush-
ingtubeintottinguntilitlocksinposition.
L. Reinstalltopandsidepanels.
M. Repressurizedryerandresumeoperation.

7
TROUBLESHOOTING GUIDE
A) Water downstream of dryer
B) High pressure drop across
dryer
C) Fault Alarm
D) Refrigeration system not func-
tioning properly
1. Whendryeron/offswitchinonor
"I"position
2. Refrigerantcompressorcycleson
andoff
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automati-
cally drained
 Drainmechanismiscloggedor
inoperative.
Drainlineisrestrictedorfrozen.
7.Dryeroverloadedresultinginel-
evated dew point.
8. Refrigerationsystemnotfunction-
ing properly resulting in elevated
dew point.
1. Inletairstrainerclogged
2.Excessiveairow
3.Separatorlter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ther-
mostaticswitchismalfunctioning
or not securely mounted.
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lterclogged
c. Condensernsclogged
d.Fanmotororfancontrolswitch
malfunction
e. Refrigerantleak
f. Lowvoltage
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
Replacedrainmechanismifinopera-
tive
Open drain line
Checkinletairtemperatureandpres-
sure,owrate(compressorcapacity)
and ambient air temperature
SeeDbelow
Cleaninletairstrainer
Checkowrate
Replaceltersleeve
SeeDbelow
SeeA7
SeeDbelow
Contactqualiedrefrigerationrepair-
manormanufacturer’sservicedepart-
ment
Checkpowertounit
Closedisconnectswitch
Checkforcontinuity
Haveelectriciancheckelectricalcon-
nections
Checkminimum/maximumtempera-
ture ranges
Cleanambientairlter
Cleancondenser
Replacefanmotororfancontrol
switch
Contactqualiedrefrigerationrepair-
manormanufacturer'sservicedepart-
ment
Checkwiring
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION

8
SPECIFICATIONS - Models 20 thru 75
Description Model
20 25 35 50 75
Operating Conditions
RatedCapacity
@125psig,8.8kgf/cm
2
*
scfm
m
3
/min
60 / 50 Hz
60 / 50 Hz
20/17
0.57/0.48
25/21
0.71/0.59
35/27
0.99/0.76
50/50
1.42/1.42
75/61
2.12/1.7
MaximumWorkingPressure 250psig(17.6kgf/cm
2
)
MaximumInletTemperature 180°F(82°C)
Min/Max.AmbientTemperature 40-110°F(4-43°C)
PressureDrop@
rated capacity
psi
(kgf/cm
2
)
60 / 50 Hz
60 / 50 Hz
4.5/2.9
(0.32/0.20)
3.3/2.4
(0.23/0.17)
4.7/2.9
(0.33/0.20)
4.5/4.5
(0.32/0.32)
3.8/2.2
(0.27/0.15)
Refrigeration System Data
CompressorType  Hermetic,Rotary,PermanentSplitCapacitor
BTU/HR-RefrigerationOnly
@ASRE-TConditions 60 / 50 Hz 8720/7043 12500/9970
OutletAirTemperature
(nominal@ratedconditions) 155°F(68°C)
RefrigerantType R-407C
RefrigerantCharge oz(grams) 60 / 50 Hz SeeDryerSerialTag
SuctionPressureSetting 67psig(4.7kgf/cm
2
)
FactoryTest(design)Pressure
highside/lowside 330/178psig(23.2/12.5kgf/cm
2
)
CondenserFanSwitchSetting(in-out) 240-180psig(16.9-12.7kgf/cm
2
)
AirFlowAcrossCondenser cfm
m
3
/min
60 / 50 Hz
60 / 50 Hz
280/235
(7.9/6.7)
620/515
(17.6/14.6)
Electrical Data
Unit
VAC/phase/Hz
115/1/60
115/1/60
 Minimum/maximumvolts 98-127
 FullLoadAmpS(FLA) 8.7 12.6
 BranchCircuitFuseSize(amps) 15 20
Compressor
 Volts/phase/Hz 115/1/60
 RatedLoadamps(RLA) 7.5 11.0
 LockedRotoramps(LRA) 44.0 67.0
 Watts(input) 853 1220
 Overload(External) ThermalandCurrent(AutoReset)
Condenserfanmotor
 Volts/phase/Watts(output) 115/1/25 115/1/35
 FullLoadAmps(FLA) 1.2 1.6
Unit
 VAC/phase/Hz
220-240/1/50
220-240/1/50
 Minimum/maximumvolts 198-264
 FullLoadAmps(FLA) 3.4 6.0
 BranchCircuitFuseSize(amps) 15
Compressor
 Volts/phase/Hz 220-240/1/50
 RatedLoadamps(RLA) 2.8 5.1
 LockedRotoramps(LRA) 18.6 28.0
 Watts(input) 690 990
 Overload(External) ThermalandCurrent(AutoReset)
Condenserfanmotor
 Volts/phase/Watts(output) 220-240/1/18.3 220-240/1/25.6
 FullLoadAmps(FLA) 0.6 0.8
* 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
SPECIFICATIONS - Models 100 and 125
Description Model
100 125
Operating Conditions
RatedCapacity
@125psig,8.8kgf/cm
2
*
scfm
m
3
/min
60 / 50 Hz
60 / 50 Hz
100/83
2.83/2.35
125/104
3.54/2.95
MaximumWorkingPressure 250psig(17.6kgf/cm
2
)
MaximumInletTemperature 180°F(82°C)
Min/Max.AmbientTemperature 40-110°F(4-43°C)
PressureDrop@
rated capacity
psi
(kgf/cm
2
)
60 / 50 Hz
60 / 50 Hz
3.5/2.6
(0.25/0.18)
4.6/3.1
(0.32/0.22)
Refrigeration System Data
CompressorType Hermetic,Rotary,PermanentSplitCapacitor
BTU/HR-RefrigerationOnly
@ASRE-TConditions 60 / 50 Hz 25140/20110
OutletAirTemperature
(nominal@ratedconditions) 155°F(68°C)
RefrigerantType R-407C
RefrigerantCharge oz(grams) 60 / 50 Hz SeeDryerSerialTag
SuctionPressureSetting 67psig(4.7kgf/cm
2
)
FactoryTest(design)Pressure
highside/lowside 330/178psig(23.2/12.5kgf/cm
2
)
CondenserFanSwitchSetting(in-out) 240-180psig(16.9-12.7kgf/cm
2
)
AirFlowAcrossCondenser cfm
m
3
/min
60 / 50 Hz
60 / 50 Hz
830/690
(23.5/19.5)
Electrical Data
Unit
VAC/phase/Hz
208-230/1/60
230/1/60
 Minimum/maximumvolts 187-253
 FullLoadAmpS(FLA) 12.2
 BranchCircuitFuseSize(amps) 20
Compressor
 Volts/phase/Hz 208-230/1/60
 RatedLoadamps(RLA) 11.3
 LockedRotoramps(LRA) 71.0
 Watts(input) 2530
 Overload(Internal) ThermalandCurrent(AutoReset)
Condenserfanmotor
 Volts/phase/Watts(output) 230/1/60
 FullLoadAmps(FLA) 0.85
Unit
 VAC/phase/Hz
220/1/50
220/1/50
 Minimum/maximumvolts 207-242
 FullLoadAmps(FLA) 14.1
 BranchCircuitFuseSize(amps) 20
Compressor
 Volts/phase/Hz 200-220/1/50
 RatedLoadamps(RLA) 13.2
 LockedRotoramps(LRA) 71.0
 Watts(input) 2212
 Overload(Internal) ThermalandCurrent(AutoReset)
Condenserfanmotor
 Volts/phase/Watts(output) 230/1/50
 FullLoadAmps(FLA) 0.85
* 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.

10
Models 20, 25, and 35
ELECTRICAL SCHEMATICS
3
LINE
SW
G
1
2
3
3
4
ATEMPERATURE
FPS 8FM CONDENSER
FAN MOTOR
4
RC
HTS 7
5
M
LT
R
C S
6
REFRIGERANT
COMPRESSOR
4
4
HIGH
4
WIRING SCHEMATIC
2
3 1
OLT
14
Models 50 and 75
3
LINE
SW
G
1
2
3
3
4
ATEMPERATURE
FPS 8FM 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
FPS
TB
HTS
FM
OLT
LT
SW
M
Front of Dryer
(Outside)
Right Side of Dryer
(Inside)
COMPONENT LOCATIONS
RC
Models 20, 25, 35, 100, and 125
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
Models 50 and 75