Spencer 4BOB Multistage Centrifugal Blowers - Manual (Page 5)

55
22.. FFlleexxiibbllee CCoonnnneeccttoorrss
CCAAUUTTIIO ONN:: CCoonnnneecctteedd ppiippiinngg m muusstt nnoott ttoouucchh tthhee bblloowweerr..
UUssee fflleexxiibbllee ccoonnnneeccttoorrss ((eexxppaannssiioonn jjooiinnttss oorr rruubbbbeerr sslleeeevveess))
oonn bbootthh tthhee iinnlleett aanndd ddiisscchhaarrggee ttoo ccrreeaattee aann iissoollaattiinngg ggaapp
bbeettwweeeenn bblloowweerr aanndd ppiippiinngg..
33.. BBuutttteerrffllyy VVaallvvee
To regulate (throttle) blower volume and/or pressure, a butterfly
valve may be installed—preferably on the inlet. A valve may
also be installed on the discharge as an isolation valve.
44.. FFiilltteerrss,, SSiilleenncceerrss aanndd FFiilltteerr SSiilleenncceerrss
Spencer blowers will accept a filter or filter silencer, typically on
the inlet, and a silencer, typically on the discharge. Inlet filtration
is recommended for pressure applications.
55.. CChheecckk VVaallvvee
CCAAUUTTIIO ONN:: AA cchheecckk vvaallvvee m muusstt bbee iinnssttaalllleedd iinn tthhee ddiisscchhaarrggee
lliinnee ((ddoowwnnssttrreeaam m ooff aannyy bbllooww--ooffff lliinnee)) ooff eeaacchh bblloowweerr ooppeerr--
aattiinngg iinn ppaarraalllleell,, oorr iinn tthhee iinnlleett lliinnee ((uuppssttrreeaam m ooff aannyy bblleeeedd
lliinnee)) ooff eeaacchh vvaaccuuuum m pprroodduucceerr ooppeerraattiinngg iinn ppaarraalllleell ttoo
pprreevveenntt rreevveerrssee ffllooww tthhrroouugghh iiddllee uunniittss..
Orient the check valve during installation to equalize loading on
the valve shutters. Usually, the hinge post of the check valve
should be installed perpendicular to the blower shaft. If the
check valve is installed in a horizontal piping line, position the
valve shaft vertically. Make sure the internal moving parts can
move freely.
66.. EElleeccttrriiccaall
NOTE: All wiring and electrical adjustments or installations must
be done by a qualified electrician in accordance with the
National Electrical Code and local codes.
CCAAUUTTIIO ONN:: TThhee eelleeccttrriiccaall sseerrvviiccee aatt tthhee iinnssttaallllaattiioonn ssiittee
m muusstt ssuuppppllyy tthhee vvoollttaaggee ssttaam mppeedd oonn tthhee m moottoorr nnaam meeppllaattee..
O Oppeerraattiioonn aatt aann iinnccoorrrreecctt vvoollttaaggee m maayy ddaam maaggee tthhee m moottoorr
aanndd vvooiidd iittss wwaarrrraannttyy..
In making electrical connections, follow the wiring instructions
furnished. Wire and fuses should be of ample capacity to
ensure that proper voltage is maintained at the motor terminals
while starting and running. It is important that proper starting
equipment is used. The starters should have thermal overload
protection as well as true low-voltage protection.
EElleeccttrriiccaall AAcccceessssoorriieess.. The following optional safety acces-
sories are available from Spencer. For copies of the product
bulletins listed, contact your Spencer Representative or
www.spencerturbine.com.
• Load Control Safety Switch (LCSS)—Bult. No. TDS-223
• Electronic Modulating Bleed Control (EMBC)— Bult. No.
TDS-224
• Bearing Temperature Monitor Control (BTMC)— Bult. No.
TDS-222
• Standard Blower Safety Control Panels (LCSS, BTMC and
VM, Vibration Monitor)—Bult. No. TDS-237 and TDS-236
NOTE: Use of a BTMC, vibration monitor and an LCSS or
EMBC may be advisable in crucial or unattended applications,
anywhere there are wide load fluctuations or where machines
are operating at high pressure or vacuum.
Both the LCSS and EMBC are designed to prevent a blower or
vacuum producer from operating in a low load (surge) condition.
77.. CCoouupplliinngg AAlliiggnnm meenntt,, 44BBO OHH && 44BBO OBB
The coupling on this machine was carefully aligned at the factory
and the coupling halves and shell(s) marked to indicate opti-
mum relative position. However, transportation may have
caused coupling misalignment.
CCAAUUTTIIO ONN:: CChheecckk tthhee m moottoorr aanndd bblloowweerr sshhaaffttss ffoorr m miissaalliiggnn--
m meenntt aanndd ccaarreeffuullllyy rreeaalliiggnn tthheem m iiff nneecceessssaarryy aafftteerr iinnssttaallllaa--
ttiioonn aanndd bbeeffoorree ssttaarrttuupp,, aass m miissaalliiggnnm meenntt ccaann ccaauussee
ddeessttrruuccttiivvee vviibbrraattiioonn.. CCoouupplliinngg aalliiggnnm meenntt sshhoouulldd bbee
rreecchheecckkeedd aaggaaiinn aafftteerr aann hhoouurrʼʼss ooppeerraattiioonn.. FFiinnaall aalliiggnnm meenntt
sshhoouulldd bbee m maaddee aatt aavveerraaggee ooppeerraattiinngg tteem mppeerraattuurree.. AAfftteerr
eeaacchh aalliiggnnm meenntt cchheecckk,, aadddd lluubbrriiccaanntt ppeerr iinnssttrruuccttiioonnss aanndd
rreeppllaaccee ccoouupplliinngg gguuaarrdd..
W
WAARRNNIINNG G:: DDIISSCCO ONNNNEECCTT AANNDD LLO OCCKK O OUUTT EELLEECCTTRRIICCAALL
PPO OW WEERR BBEEFFO ORREE PPEERRFFO ORRM MIINNG G AALLIIG GNNM MEENNTT..
On certain blowers, the coupling is disassembled after factory
alignment and marking. The coupling halves are specially pro-
tected against the elements during shipping. Prior to startup,
assemble the coupling, align keyways using factory markings
and lubricate as instructed.
Coupling alignment lines up the motor shaft and blower shaft in
horizontal and vertical planes. It also ensures an adequate
clearance (gap) between the two coupling halves. Only quali-
fied personnel should attempt to align a coupling. If problems
arise, contact Spencer or your Spencer Representative.
SSiieerr BBaatthh G
Geeaarr--TTyyppee CCoouupplliinnggss,, manufactured to our rigid
specifications, are most commonly supplied with Spencer
equipment.
SSiieerr BBaatthh HHuubb ttoo HHuubb
CCoouupplliinngg SSiizzee,, iinn.. G Gaapp,, iinn..
7/8 1/8
1-1/2 1/8
2 1/8
2-1/2 1/4
3 1/4
3-1/2 1/4
4 1/4
4-1/2 1/4
5 1/4
Remove one snap ring and slide the sleeve off the hub halves.
Using a feeler gage, verify that the gap between the coupling
halves agrees with this table.
CCAAUUTTIIO ONN:: SSoom mee m moottoorr sshhaaffttss aarree sspprriinngg--llooaaddeedd aaxxiiaallllyy.. BBee
ccaarreeffuull wwhheenn uussiinngg tthhee ffeeeelleerr ggaaggee ttoo aavvooiidd ccoom mpprreessssiinngg
tthhee sshhaafftt aanndd ddiissttuurrbbiinngg tthhee nnoorrm maall aatt--rreesstt ppoossiittiioonn..
M Maacchhiinneerryy SSoofftt FFoooott
Imperfections or unevenness between the machine base and
any foot of the motor or blower creates a condition known as
soft foot, which may be parallel or angular. If uncorrected, soft
foot leads to increased stress and high vibration. Although both
the motor and blower feet were preset at the factory, each foot
must be checked for soft foot prior to alignment. Any vertical or
angular soft foot that exceeds .003” is excessive and must be
corrected.