FScurtis RNH20 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
Se ial 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.