SCXF-SVX01Q-EN
79
Pre-Startup
Before starting up units, perform the following
procedure to ensure proper unit operation.
Units with VFD
This panel is hinged to allow service access to fan
motor and belt drive components that are located
behind it.
NNoottee:: The panel weight rating is 225 lbs. total including
factory-installed components.
WWAARRNNIINNGG
PPrrooppeerr FFiieelldd WWiirriinngg aanndd GGrroouunnddiinngg
RReeqquuiirreedd!!
FFaaiilluurree ttoo ffoollllooww ccooddee ccoouulldd rreessuulltt iinn ddeeaatthh oorr
sseerriioouuss iinnjjuurryy..
AAllll ffiieelldd wwiirriinngg MMUUSSTT bbee ppeerrffoorrmmeedd bbyy qquuaalliiffiieedd
ppeerrssoonnnneell.. IImmpprrooppeerrllyy iinnssttaalllleedd aanndd ggrroouunnddeedd
ffiieelldd wwiirriinngg ppoosseess FFIIRREE aanndd EELLEECCTTRROOCCUUTTIIOONN
hhaazzaarrddss.. TToo aavvooiidd tthheessee hhaazzaarrddss,, yyoouu MMUUSSTT ffoollllooww
rreeqquuiirreemmeennttss ffoorr ffiieelldd wwiirriinngg iinnssttaallllaattiioonn aanndd
ggrroouunnddiinngg aass ddeessccrriibbeedd iinn NNEECC aanndd yyoouurr llooccaall//
ssttaattee//nnaattiioonnaall eelleeccttrriiccaall ccooddeess..
WWAARRNNIINNGG
HHaazzaarrddoouuss VVoollttaaggee ww//CCaappaacciittoorrss!!
FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn
ddeeaatthh oorr sseerriioouuss iinnjjuurryy..
DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee
ddiissccoonnnneeccttss aanndd wwaaiitt ffoorr DDCC ccaappaacciittoorrss ttoo
ddiisscchhaarrggee bbeeffoorree sseerrvviicciinngg.. RReeffeerr ttoo tthhee
mmaannuuffaaccttuurreerr’’ss rreeccoommmmeennddaattiioonnss ffoorr pprrooppeerr
ddiisscchhaarrggee ttiimmee aass DDCC bbuuss ccaappaacciittoorrss rreettaaiinn
hhaazzaarrddoouuss vvoollttaaggeess aafftteerr iinnppuutt ppoowweerr hhaass bbeeeenn
ddiissccoonnnneecctteedd.. FFoollllooww pprrooppeerr lloocckkoouutt// ttaaggoouutt
pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr ccaannnnoott bbee
iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. VVeerriiffyy wwiitthh aa CCAATT IIIIII oorr IIVV
vvoollttmmeetteerr rraatteedd ppeerr NNFFPPAA 7700EE tthhaatt aallll ccaappaacciittoorrss
hhaavvee ddiisscchhaarrggeedd bbeeffoorree ttoouucchhiinngg aannyy iinntteerrnnaall
ccoommppoonneennttss..
FFoorr aaddddiittiioonnaall iinnffoorrmmaattiioonn rreeggaarrddiinngg tthhee ssaaffee
ddiisscchhaarrggee ooff ccaappaacciittoorrss,, sseeee PPRROODD--SSVVBB0066**--EENN..
1. Remove the unit center cover panel to the left of the
VFD panel.
2. Verify/remove/discard the sheet metal shipping
screws along the top and bottom edges of the VFD
panel.
3. Disconnect the communications cable from the
keypad on the VFD door panel.
4. Turn the two slotted-head fasteners on the right
edge of the VFD panel fully counterclockwise.
5. Pull on the handle to swing the panel 180°.
NNoottee:: To secure the panel in the open position during
service procedures, attach the chain mounted to
the cabinet frame behind the unit center cover
panel to the chain retainer notch on the edge of
the VFD panel.
To close and reattach the panel, reverse the above
procedures.
NNoottee:: Verify that all wires are in proper position and
not rubbing once the panel has been secured.
Pre-Startup Checklist
Complete this checklist after installing unit to verify all
recommended installation procedures are complete
before startup. This does not replace the detailed
instructions in the appropriate sections of this manual.
Always read the entire section carefully to become
familiar with the procedures.
Supply Fan
• Verify the fan and motor shafts are parallel.
• Verify the fan and motor sheaves are aligned.
• Check the fan belt condition and tension. Adjust the
tension if belts are floppy or squeal continually.
Replace worn or fraying belts in matched sets.
• Ensure the fan rotates freely.
• Tighten locking screws, bearing set screws and
sheaves.
• Ensure bearing locking collars do not wobble when
rotated.
• Remove fan assembly tie down bolts.
• Ensure fan rotation is in direction of arrow on fan
housing. If incorrect, verify incoming power
phasing is correct. Switch wires on the fan contact
to properly phase fan if necessary.
Ductwork
• Ensure trunk ductwork to VAV boxes is complete
and secure to prevent leaks.
• Verify that all ductwork conforms to NFPA 90A or
90B and all applicable local codes
Water-Cooled Unit Piping
• Verify condensate drain, water piping drain plugs,
economizer header, and condenser vent plug are
installed.
Air-Cooled Units Only
• Verify leak test was performed after refrigerant
piping was installed.
To Next Page
Loading...
Need help?
General
