2625 N. Argyle Ave. • Fresno, CA 93727 (559) 291-1650 • (800) 428-7139 • FAX (559) 348-9677 TECH WEST INC. Manufacturers of Dental Vacuum and Air Systems ULTRA CLEAN ROCKY COMPRESSOR INSTALLATION AND SERVICE MANUAL Revised 4-15
2625 N. Argyle Ave. • Fresno, CA 93727(559) 291-1650 • (800) 428-7139 • FAX (559) 348-9677
TECH WEST INC.Manufacturers of Dental Vacuum
and Air Systems
ULTRA CLEANROCKY COMPRESSOR
INSTALLATION
AND SERVICE
MANUAL Revised 4-15
ULTRA CLEANROCKY COMPRESSOR
INSTALLATION AND SERVICE MANUALThis manual is for the installation and service of Tech West’s Ultra Clean Rocky Compressors.
CONTENTSInstallation
Location Requirements 2
Figure 1: Wire and Breaker Sizes 2
Ultra Clean Rocky Installation Steps 3
Ultra Clean Rocky Compressor Connections 4
Ultra Clean Rocky Start Up 5
Ultra Clean Rocky Maintenance 6
Ultra Clean Rocky Compressor Motor Assembly Breakdown 7-8
Coalescing Filter Assembly Breakdown 9
Tank Breakdown 10
Desiccant Dryer Parts Breakdown 11
Gauge and Moisture Indicator Assembly Breakdown 12
Wiring Diagram 13
Dual Ultra Clean Rocky Compressor Assembly 14
Triple Ultra Clean Rocky Compressor Assembly 15
Quad Ultra Clean Rocky Compressor Assembly 16
Maintenance Schedule 17
TROUBLE SHOOTING
Dual Rocky Compressor Trouble Shooting 18-19
Triple Rocky Compressor Trouble Shooting 20-21
Air Line Sizing Chart 22Maintenance/Service and notes 23-25
1
ULTRA CLEAN ROCKY COMPRESSORINSTALLATION
1. ROCKY COMPRESSOR LOCATION REQUIREMENTS
The Ultra Clean Rocky Compressor location should be level, accessible and well ventilated.
If the Ultra Clean Rocky Compressor will be located in a confined space, provide adequate ventilation.
Electrical
(1) Line voltage must be within the limits of Figure 1 below. (Install a “buck-boost transformer” if line voltage is not between these values.) Circuit breaker switches must be 20 - 30 amp depending on model and voltage necessary.
(2) Local code may require you to provide a quick disconnect (safety switch) for the compressor.
(3) See Figure 1 below for breaker size and line voltage.
CAUTION - Voltage must be 208/240 V or motor damage may occur.
CAUTION - Voltage must be 110/120 V or motor damage may occur.
2
Figure 1: Recommended Wire and Breaker Size
Dual Head Compressors
Model Voltage Amperage Wire Size Recommended(Gauge) Breaker Size
ACOR2D1 110/120 11 12 20
ACOR2D2 208/230 8 12 20
ACOR2D1Q 110/120 11 12 20
ACOR2D2Q 208/230 8 12 20
ACOR3T2 208/230 12 12 20
ACOR3T2Q 208/230 12 12 20
ACOR4Q2 208/230 16 10 30
Triple Head Compressors
Quad Head Compressors
ULTRA CLEAN ROCKY COMPRESSORINSTALLATION
2
2. INSTALLATION STEPS
This dental compressor should only be installed by qualified personnel. Should any questions ariseduring the installation, call Tech West Technical Support between the hours of 7:00 a.m. to 4:00 p.m.(Pacific Standard Time).
Place the compressor in a clean, dry, well ventilated area, on a solid, level surface. Consider soundlevel and insulate as needed. Be sure that adequate ventilation is available as the compressor is aircooled. Ambient temperature in the equipment room should be within the temperature range of 40degrees Fahrenheit minimum to 100 degrees Fahrenheit maximum.
(a) Check the shipping carton for damage. This could detect damage to the unit which might otherwise be overlooked. Remove cardboard shipping carton.
(b) Remove the Oilless Compressor from its shipping skid. Inspect the unit for damage.Oilless Compressors are shipped bolted to a pallet. This pallet is intended for shipping only and should be discarded.
(c) Remove installation kit attached to pallet. It should contain the following:
(4) Isolation Feet(1) Alternate Air Hookup Hose(1) 5’ Flexible Air Hose
(d) Install isolation feet on tank legs.
(e) Move compressor into place and level by observing bubble level on compressor platform.
(f) Wiring instructions:
(1) Have all electrical connections made by qualified personnel only. All connections should be in accordance with local codes.
(2) Use the chart on page 1 to help determine the proper line and breaker size for the unit that is being installed.
(g) Install the air line from the compressor tank to the building supply.
(h) Install the 1” flex alternate air hose from the compressor to a fresh air supply.
3
0
10
20
3040 50
607
8
90100
psi
Electrical Connection to disconnect and electrical panel
(110 v / 220 v)
Air OutConnection to building
supply line
4
ULTRA CLEAN ROCKY COMPRESSORINSTALLATION
2
3. CONNECTIONS
Alternate Air Connection
to fresh air supply
Figure 2
Dryer PurgeConnection
5
ULTRA CLEAN ROCKY COMPRESSORINSTALLATION
2
4. SAFETY PRECAUTIONS
• Keep fingers, foreign objects and clothing free from rotating parts and do not touch hot surfaces.
• Never attempt to service an operating unit.
• Isolate unit from system pressure and relieve backpressure before servicing
• Disconnect all power before servicing. The thermal protector in single phase motors automatically starts motor when device resets.
USE OF THIS PRODUCT IN OR NEAR EXPLOSIVE ATMOSPHERES, OR FOR
PUMPING MIXTURES OTHER THAN ATMOSPHERIC AIR MAY CAUSE AN
EXPLOSION OR FIRE, RESULTING IN PERSONAL INJURY OR DEATH.
2
5. START-UP STEPS
(a) Make sure the shut-off valve from the compressor tank is closed.
(b) Turn the breaker from the panel to the “ON” position.
(c) Turn power “ON” from the toggle switch on the compressor. Compressor should run quietly and vibration free. The storage tank should start to build pressure.
(d) The compressor will run until the pressure gauge reads 100 psi. The compressor then will automatically shut off and the dryer will purge with a quick blast of air.
(e) Using soapy water, check the compressor plumbing hook ups for leaks. Repair leaks if needed.
(f) Pressure test the entire plumbing system for leaks. Use the storage tank pressure gauge to monitor a pressure drop. After the plumbing system has been pressurized for 30 minutes, re-check the gauge for pressure drop. If there is a drop in pressure, find and repair all leaks in the office plumbing.
(g) Complete and mail in the warranty card for the compressor within ten days of installation.
AIR LEAKS ARE THE MAIN CAUSE OF COMPRESSOR FAILURES.
6
7. PERIODIC SERVICING
MONTHLY SERVICING
(a) Remove the purge bucket and empty as needed(b) Crack the drain petcock on the bottom of the storage tank to check for water and drain if needed.(c) Check moisture indicator to see that it is still “BLUE”. If it is pink, it is time to service the air dryer.(d) Check pump-up times of the compressor.(e) Check intake air supply filters. Replace filters as needed.
YEARLY SERVICING
(a) Repeat all of the monthly servicing.(b) Replace the dessicant air dryer. (Part #: RDC-100)(c) Replace the alternate air filter. (Part #: TIF-100)(e) Replace the moisture indicator on the compressor. (Part #: MI -100)(f) Check the coalescing filter and change if needed. (Part #: CFEO-375)
ULTRA CLEAN ROCKY COMPRESSORINSTALLATION
2
6. GENERAL SERVICE INFORMATION
For parts and service on Rocky series products contact the nearest authorized Tech West distribu-tor. To expedite appropriate service, be prepared to provide the unit model number, identificationnumber, and serial number found on the nameplate located on the front of the unit motor.
Component life operating at continuous duty & maximum pressure will shorten the life of the ringsand skirts. It is difficult to predict due to many conditions which directly influence wear. Some ofthese conditions may include ambient air temperature, air cleanliness, operating pressure, pistonstroke on the particular model being utilized, duty cycle, maintenance of filters, etc.
Because of these various factors it is appropriate to generalize on component wear life and choosesome conservative estimates for most standard applications.
With these conditions in mind, we recommend the following preventative maintenance schedule.
RECOMMENDED MAINTENANCEFOR ROCKY MODELS
Minor Service Kits, Piston Cups & Valves, Skirts, Etc.
Major Replacement Kit, Piston & Rod Assemblies
Replace inlet Filter
HOURS
Cont. DutyMaximum Pressure
8,000 Hours
12,000 Hours
4,000 Hours
TIME
Based on 100%Duty Cycle
12 months
18 months
6 months
KEY PART NO. DESCRIPTION UNIT
13 CV-250D 1/4 CHECK VALVE 1
16 GOM-075R-115 OILLESS MOTOR 3/4 HP 115V 1-4
17 GOM-075R-230 OILLESS MOTOR 3/4 HP 230V 1
20 BE-4 BRASS ELBOW 1/4” 2
21 FE-4-6 BRASS FLAIR ELBOW 1/4” X 3/8 1
22 BN-1.50 BRASS NIPPLE 1/4” X 1 1/2 1
7
ULTRA CLEAN ROCKY COMPRESSORPARTS LIST
ROCKY OIL-FREE COMPRESSOR MOTOR
21
20
1617
13
22
8
KEY PART NO. DESCRIPTION UNIT
1 RCF-100 COOLING FAN 2
2 RFS-100 FAN SHROUD 2
3 RRP-100 RETAINER PLATE 2
4 RPC-100 PISTON CUP 2
5 RVS-100 VALVE PLATE SET 2
6 RCOR-100 CYLINDER O-RING 2
7 RHOR-100 HEAD 0-RING 2
8 RCT-100 CROSS OVER TUBE 2
9 RCVS-100 COMPLETE VALVE PLATE ASSEMBLY 2
ROCKY OIL-FREE MOTOR 3/4HPBREAKDOWN 5
5
3
7
8
2
9
4
1
6
9
ROCKY FILTER ASSEMBLY
1
2
3
KEY PART NO. DESCRIPTION UNIT
1 CFAO-375 COALESCING FILTER ASSEMBLY 3/8 1
2 CFEO-375 COALESCING FILTER ELEMENT 3/8 1
3 CFBP-375 COALESCING FILTER BOWL 1
10
ROCKY REAR VIEW TANK ASSEMBLY AND PARTS LIST
KEY PART NO. DESCRIPTION UNIT
1 CV-375D-100 3/8 CHECK VALVE MALE TO FEMALE CONNECTION 1-4
2 CPT-100 COMPRESSOR PURGE TANK 1
4 HA-10-250 1/4 HOSE ASSEMBLY - 10” LONG 1
5 DPC-1 DRYER PRE COOLER DUAL COMPRESSOR 1
6 DPC-2 DRYER PRE COOLER TRIPLE & QUAD COMPRESSOR 1
7 RFV-100 RUBBER MOUNTING FEET 4
8 CV-500D-100 1/2 CHECK VALVE 1
4
1
2
18
7
56
11
ROCKY DESICCANT AIR DRYER ASSEMBLY
KE
YP
AR
T N
O.
DE
SC
RIP
TIO
NU
NIT
1D
SV
-115
115V
PU
RG
E S
OL
EN
OID
VA
LVE
1
2D
SV
-230
230V
PU
RG
E S
OL
EN
OID
VA
LVE
1
3A
S-5
001/
2 F
ILT
ER
AS
SY
1
4R
DC
-100
RE
PL
AC
EM
EN
T D
ES
SIC
AN
T T
AN
K1
5M
V-2
50M
ET
ER
ING
VA
LVE
1
6S
N-2
50-C
LS
TAIN
LE
SS
ST
EE
L N
IPP
LE
1/4
3
7F
E-4
-6F
LA
IR F
ITT
ING
1/4
X 3
/81
8B
V-2
50B
AL
L V
ALV
E 1
/41
9B
T-25
0B
RA
SS
TE
E 1
/42
10F
PH
-375
CL
EA
R P
UR
GE
HO
SE
PE
R F
OO
T
11M
SD
-100
MO
LE
CU
LA
R-S
IEV
E
1 L
B2L
BS
12M
SD
-200
AC
TIV
AT
ED
AL
UM
INA
1 L
B2L
BS
13C
V-2
50D
1/4
CH
EC
K V
ALV
E1
4
3
5
6
9
7
8
9
12
13
1211
INSIDETANK
ELEMENT
10
12
0
10
20
3040 50
60
7
8
90100
psi
100
90
80
706050
0
0
20
10
0
2
4
4
3
3
2
5
5
8
6
7
7
1
1
KEY PART NO. DESCRIPTION UNIT
1 CPG-250 COMPRESSOR GAUGE 1
2 BV-250 1/4” BALL VALVE 1
3 MI-100 MOISTURE INDICATOR 1
4 FA-4-4 1/4” FLARE HOSE FITTING 1
5 BN-250-CL 1/4” BRASS CLOSE NIPPLE 1
6 BT-250 1/4” BRASS TEE 1
7 BSE-250 1/4” BRASS ELBOW 1
8 BPC-4 1/4” BRASS CROSS 1
ROCKY GAUGE AND CUT-OFF ASSEMBLY
DUAL COMPRESSOR CONFIGURATION
TRIPLE & QUADCOMPRESSOR CONFIGURATION
13
ROCKY WIRING DIAGRAMS
WIRING DIAGRAM WITH SOUND COVER AND 24v SWITCH
ROCKY DUAL WITHOUT SOUND COVER
14
0
10
20
3040 50
607
8
90100
psi
8
16
17
18
19
7
5
12
94
KEY PART NO. DESCRIPTION UNIT
1 SBHA-21-375 STEEL BRAID HOSE ASSEMBLY 1
3 DSV-115 PURGE VALVE SOLENOID VALVE 115v 1
4 FPH-375 PURGE FLEX HOSE CLEAR PER FT
5 ZZACS61 1/4 HOSE ASSEMBLY PER FT
6 PFT-500 POLY FLO TUBE 1/2 PER FT
7 CFAO-375 COALESCING FILTER 3/8 1
8 CFEO-375 COALESCING FILTER ELEMENT ONLY 1
9 DPB-100 DRYER PURGE BUCKET 1
10 RIC-GAST RUBBER MOUNTING FEET 8
11 CPT-100 COMPRESSOR PURGE TANK 1
12 RDC-100 REPLACEMENT DESICCANT CARTRIDGE 1
13 CV-250D 3/8 CHECK VALVE 2
14 DSV-230 PURGE VALVE SOLENOID VALVE 230V 1
15 SBHA-18-375 STEEL BRAID HOSE ASSEMBLY 2
16 GOM-075R-115 OILLESS MOTOR 3/4 HP 115V 2
17 GOM-075R-230 OILLESS MOTOR 3/4 HP 230V 2
18 RFV-100 RUBBER MOUNTING FEET 4
19 PSC-3 PRESSURE SWITCH 1
DUAL ULTRA CLEAN ROCKY COMPRESSOR
314
11
13
6
15
10
1
15
KEY PART NO. DESCRIPTION UNIT
1 SBHA-21-375 STEEL BRAID HOSE ASSEMBLY 1
4 FPH-375 PURGE FLEX HOSE CLEAR PER FT
5 ZZACS61 1/4 HOSE ASSEMBLY PER FT
6 PFT-500 POLY FLO TUBE 1/2 PER FT
7 CFAO-375 COALESCING FILTER 3/8 1
8 CFEO-375 COALESCING FILTER ELEMENT ONLY 1
9 DPB-100 DRYER PURGE BUCKET 1
10 RIC-GAST RUBBER MOUNTING FEET 12
11 CPT-100 COMPRESSOR PURGE TANK 1
12 RDC-100 REPLACEMENT DESICCANT CARTRIDGE 1
13 CV-375D-100 3/8 CHECK VALVE 3
14 DSV-230 PURGE VALVE SOLENOID VALVE 230V 1
15 SBHA-18-375 STEEL BRAID HOSE ASSEMBLY 2
16 GOM-075R-230 OILLESS MOTOR 3/4 HP 230V 3
17 RFV-100 RUBBER MOUNTING FEET 4
18 PSC-3 PRESSURE SWITCH 1
TRIPLE ULTRA CLEAN ROCKY COMPRESSOR
8
16
17
7
5
12
94
14
6
1
18
10
1315
16
KEY PART NO. DESCRIPTION UNIT
1 SBHA-21-375 STEEL BRAID HOSE ASSEMBLY 1
4 FPH-375 PURGE FLEX HOSE CLEAR PER FT
5 ZZACS61 1/4 HOSE ASSEMBLY PER FT
6 PFT-500 POLY FLO TUBE 1/2 PER FT
7 CFAO-375 COALESCING FILTER 3/8 1
8 CFEO-375 COALESCING FILTER ELEMENT ONLY 1
9 DPB-100 DRYER PURGE BUCKET 1
10 RIC-GAST RUBBER MOUNTING FEET 16
11 CPT-100 COMPRESSOR PURGE TANK 1
12 RDC-100 REPLACEMENT DESICCANT CARTRIDGE 1
13 CV-375D-100 3/8 CHECK VALVE 4
14 DSV-230 PURGE VALVE SOLENOID VALVE 230V 1
15 SBHA-18-375 STEEL BRAID HOSE ASSEMBLY 2
16 GOM-075R-230 OILLESS MOTOR 3/4 HP 230V 4
17 RFV-100 RUBBER MOUNTING FEET 4
18 PSC-3 PRESSURE SWITCH 1
QUAD ULTRA CLEAN ROCKY COMPRESSOR
8
16
17
7
5
12
94
14
6
1
10
13
18 10
15
17
Maintenance & Service SuppliesService scheduled for: Service items needed:
18
DO
ES
AIR
C
OM
PR
ES
SO
RR
UN
?
Doe
s co
mpr
esso
r ru
nfo
r a
few
sec
onds
,“c
hugs
”, t
hen
stop
s?
Doe
s co
mpr
esso
r pr
es-
suriz
e fr
om 8
0 to
100
psi i
n le
ss t
han
2m
inut
e w
ith n
o ai
rbe
ing
used
?
Doe
s co
mpr
esso
rcy
cle
with
no
air
bein
g us
ed?
YE
SN
OY
ES
NO
GO
ON
TO
TH
E N
EX
TP
AG
E.
Are
the
re le
aks
inco
mpr
esso
r or
inof
fice
pipi
ng s
yste
m?
Doe
s ai
rbl
eed
out
the
purg
eva
lve
whe
nun
it is
ru
nnin
g?
Cle
an
or
repl
ace.
Rep
lace
inta
ke
filte
r.
NO
NO
Che
ck v
olta
ge a
tth
e va
lve
and
mak
e su
re v
alve
iscl
osed
.
Doe
sun
load
erva
lve
pres
-su
re s
witc
hor
flo
atas
sem
bly
seat
whi
leru
nnin
g?
NO
YE
S
Trou
ble
Shoo
ting
Char
tD
ual
Ult
ra C
lean
Ro
cky
Co
mp
ress
or
Dua
l Ultr
a Cl
ean
Roc
ky C
ompr
esso
r
YE
S
0
10203040
50607 8 90
100
psi
Is t
he m
oist
ure
indi
cato
r pi
nk?
YE
S
Is in
take
filte
rcl
ogge
d?
Is t
here
suf
ficie
ntpr
essu
re b
uild
-up
with
hea
d di
scha
rge
line
rem
oved
?
YE
S
NO
Def
ectiv
ehe
ad,
cont
act
Tech
Wes
t.
No
te:
Clo
sesh
ut o
ff va
lve.
Pum
p up
tan
k to
100
psi.
If pr
es-
sure
is m
ain-
tain
ed f
or 1
5-20
min
., le
ak is
inof
fice
lines
.
YE
SLo
cate
and
repa
ir.
NO
NO
Doe
s pu
rge
valv
esy
stem
func
tion
prop
erly
?
YE
S
Doe
s co
m-
pres
sor
run
too
hot
or t
oofr
eque
nt?
NO
Che
ck f
or p
rope
rvo
ltage
. U
se b
uck-
boos
t if
need
ed.
NO
1. L
ocat
e an
d re
pair
leak
s.2.
Ven
tilat
e if
room
isab
ove
100
deg.
F.
3. C
onta
ct c
ompr
esso
rm
ay b
e un
ders
ized
.
YE
S
YE
S
Ser
vice
dry
er a
ndre
plac
e m
oist
ure
indi
cato
r.
YE
S
Che
ck v
olta
ge
supp
lied
to t
he
com
pres
sor.
YE
S
Def
ectiv
ehe
ad,
cont
act
Tech
Wes
t.
YE
S
NO
Doe
s ai
r le
akfr
om u
nloa
der
valv
e or
the
purg
e m
uffle
rco
ntin
uous
lyun
til u
nit
cycl
esag
ain?
Mak
e su
re t
hat
the
drye
r va
lve
is c
los-
ing
prop
erly
.
19
CHECK FOR:1. Broken or loose
wire.2. Defective pressure
switch.3. Defective ON/OFF
switch.4. Excessive voltagedrop across power
lines.NOTE: Voltageshould be + or -10% of rating.
Is there sufficientvoltage at motorterminals while
motor tries to start?
GO ON TOTHE NEXT
PAGE.
COMPRESSORDOES NOT RUNOR RUNS FORONLY A FEWSECONDS.
YES
Does headrun with dis-charge line
disconnected?
NO
Is there suffi-cient voltageat disconnect
box?
Blockage inair line locate
& repair.
YES
Install Tech West
transformer.
NOYES NO
YES
Is thereresistance
rise acrossthe capaci-
tors?
YES
Replacedefective
capacitors.
NO
Turn power off.Remove fan guard.Try turning fan byhand. If it doesn’tturn, contact head
may be frozen.
NOTE:Short capacitor
leads. Check resis-tance rise. If noresistance rise,
replace.
Du
al U
ltra
Cle
an R
ock
y C
om
pre
sso
rROCKY DUAL WITHOUT SOUND COVER
20
Doe
s co
mpr
esso
r ru
nfo
r a
few
sec
onds
,“c
hugs
”, t
hen
stop
s?
Doe
s co
mpr
esso
r pr
es-
suriz
e fr
om 8
0 to
100
0ps
i in
less
tha
n 1
min
ute
with
no
air
bein
g us
ed?
Doe
s co
mpr
esso
rcy
cle
with
no
air
bein
g us
ed?
YE
SN
OY
ES
GO
ON
TO
TH
E N
EX
TP
AG
E.
Are
the
re le
aks
inco
mpr
esso
r or
inof
fice
pipi
ng s
yste
m?
Cle
an
or
repl
ace.
Rep
lace
inta
ke
filte
r.
NO
NO
YE
S
Trou
ble
Shoo
ting
Char
tTr
iple
Ult
ra C
lean
Ro
cky
Co
mp
ress
or
Trip
le U
ltra
Clea
n R
ocky
Com
pres
sor
Is in
take
filte
rcl
ogge
d?
Is t
here
suf
ficie
ntpr
essu
re b
uild
-up
with
hea
d di
scha
rge
line
rem
oved
?
YE
S
NO
Def
ectiv
ehe
ad,
cont
act
Tech
Wes
t.
No
te:
Clo
sesh
ut o
ff va
lve.
Pum
p up
tan
k to
100
psi.
If pr
es-
sure
is m
ain-
tain
ed f
or 1
5-20
min
., le
ak is
inof
fice
lines
.
YE
SLo
cate
and
repa
ir.
NO
Def
ectiv
ehe
ad,
cont
act
Tech
Wes
t.
YE
S
NO
Loca
tean
d re
pair.
YE
S
Is t
here
abl
ocka
ge in
air
lines
?
YE
SN
O
Is t
he m
oist
ure
indi
cato
r pi
nk?
NO
Doe
sun
load
erva
lve
syst
emfu
nctio
npr
oper
ly?
YE
S
Doe
s co
m-
pres
sor
run
too
hot
or t
oofr
eque
nt?
NO
Che
ck f
or p
rope
rvo
ltage
. U
se b
uck-
boos
t if
need
ed.
NO
1. L
ocat
e an
d re
pair
leak
s.2.
Ven
tilat
e if
room
isab
ove
100
deg.
F.
3. C
onta
ct c
ompr
esso
rm
ay b
e un
ders
ized
.
YE
S
Ser
vice
dry
er a
ndre
plac
e m
oist
ure
indi
cato
r.
YE
S
NO
Che
ck v
olta
ge a
tth
e va
lve
and
mak
e su
re v
alve
iscl
osed
.
Doe
sun
load
erva
lve
pres
-su
re s
witc
hor
flo
atas
sem
bly
seat
whi
leru
nnin
g?
Che
ck v
olta
ge s
up-
plie
d to
the
co
mpr
esso
r.
YE
S
Doe
s ai
rbl
eed
out
the
relie
fva
lve?
NO
YE
S
YE
S
Doe
s ai
r le
akfr
om u
nloa
der
valv
e or
the
purg
e m
uffle
rco
ntin
uous
lyun
til u
nit
cycl
esag
ain?
Mak
e su
re t
hat
the
drye
r va
lve
is c
los-
ing
prop
erly
.
DO
ES
AIR
C
OM
PR
ES
SO
RR
UN
?
21
Trip
le U
ltra
Cle
an R
ock
y C
om
pre
sso
r
CHECK FOR:1. Broken or loose
wire.2. Defective pressure
switch.3. Defective ON/OFF
switch.4. Excessive voltagedrop across power
lines.
NOTE: Voltageshould be + or -10% of rating.
Is there sufficientvoltage at motorterminals while
motor tries to start?
GO ON TOTHE NEXT
PAGE.
COMPRESSORDOES NOT RUNOR RUNS FORONLY A FEWSECONDS.
Does headrun with dis-charge line
disconnected?
NO
Is there suffi-cient voltageat disconnect
box?
Blockage inair line locate
& repair.
YES
Install Tech West
transformer.
NO
NO
YES
Is thereresistance
rise acrossthe capaci-
tors?
YES
Replacedefective
capacitors.
NO
Turn power off.Remove fan guard.Try turning fan byhand. If it doesn’tturn, contact head
may be frozen.
NOTE:Short capacitor
leads. Check resis-tance rise. If noresistance rise,
replace.
WIRING DIAGRAM WITH SOUND COVER AND 24v SWITCH
YES
YES
22
23
Maintenance & Service / Notes
24
Maintenance & Service / Notes
25
Maintenance & Service / Notes
2625 N. Argyle Ave. • Fresno, CA 93727(559) 291-1650 • (800) 428-7139 • FAX (559) 348-9677
TECH WEST INC.Manufacturers of Dental Vacuum
and Air Systems