98
SCXF-SVX01Q-EN
system back into service.
8. Straighten any coil fins that may be damaged with a
fin rake.
9. Replace all panels and parts and restore electrical
power to the unit.
10. Ensure that contaminated material does not contact
other areas of the equipment or building. Properly
dispose of all contaminated materials and cleaning
solutions.
Refrigerant Coils
WWAARRNNIINNGG
HHaazzaarrddoouuss VVoollttaaggee ww//CCaappaacciittoorrss!!
FFaaiilluurree ttoo ddiissccoonnnneecctt ppoowweerr aanndd ddiisscchhaarrggee
ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg ccoouulldd rreessuulltt iinn ddeeaatthh oorr
sseerriioouuss iinnjjuurryy..
DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee
ddiissccoonnnneeccttss aanndd ddiisscchhaarrggee aallll mmoottoorr ssttaarrtt//rruunn
ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg.. 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..
FFoorr aaddddiittiioonnaall iinnffoorrmmaattiioonn rreeggaarrddiinngg tthhee ssaaffee
ddiisscchhaarrggee ooff ccaappaacciittoorrss,, sseeee PPRROODD--SSVVBB0066**--EENN..
1. Disconnect all electrical power to the unit.
2. Wear the appropriate personal protective
equipment (PPE).
3. Access to the coil section of the unit (both sides).
4. Use a soft brush to remove loose debris from both
sides of the coil.
5. Mix a high quality coil cleaning detergent with
water according to the manufacturer’s instructions.
If the detergent is strongly alkaline after mixing (pH
8.5 or higher), it must contain an inhibitor. Carefully
follow the cleaning solution manufacturer’s
instructions regarding product use.
6. Place the mixed solution in a garden pump-up
sprayer or high pressure sprayer. If using a high
pressure sprayer note the following:
• Maintain a minimum nozzle spray angle of 15°
• Spray perpendicular to the coil face
• Protect other areas of the equipment and
internal controls from contact with moisture or
the cleaning solution
• Keep the nozzle at least six inches from the coil
• Do not exceed 600 psig
Draining the Waterside Economizer Coil
NNOOTTIICCEE
CCooiill FFrreeeezzee--UUpp!!
FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonn bbeellooww ccoouulldd rreessuulltt iinn
eeqquuiippmmeenntt ddaammaaggee..
DDrraaiinn aanndd vveenntt ccooiillss wwhheenn nnoott iinn uussee.. TTrraannee
rreeccoommmmeennddss ggllyyccooll pprrootteeccttiioonn iinn aallll ppoossssiibbllee
ffrreeeezziinngg aapppplliiccaattiioonnss.. UUssee aa ggllyyccooll aapppprroovveedd ffoorr
uussee wwiitthh ccoommmmeerrcciiaall ccoooolliinngg aanndd hheeaattiinngg ssyysstteemmss
aanndd ccooppppeerr ttuubbee ccooiillss..
Drain plugs are in the piping below supply and return
header for each coil. Use these plugs to drain the coil
and piping. When draining the coil, open the vents at
the top of the supply and return headers. Also, a drain
plug is at the bottom of the inlet condenser manifold
and in the outlet pipe near the left side of the unit.
Remove these plugs to drain the condensers. Be sure
to open the vent plugs at the top of the condenser inlet
and outlet manifold. See .
When refilling the condenser/waterside economizer
coil system with water, provide adequate water
treatment to prevent the formation of scale or
corrosion.
Cleaning the Condenser
NNOOTTIICCEE
PPrrooppeerr WWaatteerr TTrreeaattmmeenntt RReeqquuiirreedd!!
TThhee uussee ooff uunnttrreeaatteedd oorr iimmpprrooppeerrllyy ttrreeaatteedd wwaatteerr
ccoouulldd rreessuulltt iinn ssccaalliinngg,, eerroossiioonn,, ccoorrrroossiioonn,, aallggaaee oorr
sslliimmee..
UUssee tthhee sseerrvviicceess ooff aa qquuaalliiffiieedd wwaatteerr ttrreeaattmmeenntt
ssppeecciiaalliisstt ttoo ddeetteerrmmiinnee wwhhaatt wwaatteerr ttrreeaattmmeenntt,, iiff
aannyy,, iiss rreeqquuiirreedd.. TTrraannee aassssuummeess nnoo rreessppoonnssiibbiilliittyy
ffoorr eeqquuiippmmeenntt ffaaiilluurreess wwhhiicchh rreessuulltt ffrroomm uunnttrreeaatteedd
oorr iimmpprrooppeerrllyy ttrreeaatteedd wwaatteerr,, oorr ssaalliinnee oorr bbrraacckkiisshh
wwaatteerr..
Condensing water contains minerals that collect on the
condenser tube walls. Cooling towers also collect dust
and foreign materials that deposit in the condenser
tube. The formation of scale or sludge in the condenser
is indicated by a decreased water flow, low
temperature difference between inlet and outlet water,
and abnormally high condensing temperatures. To
maintain maximum condenser efficiency, the
condenser must remain free of built-up scale and
sludge. Clean the condenser either mechanically or
chemically.
1. Disconnect all electrical power to the unit.
2. Wear appropriate personal protective equipment
(PPE).
3. Access both sides of the coil section.
4. Use a soft brush to remove loose debris from both
sides of the coil.
MMaaiinntteennaannccee
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