Service manual

6-32T-294-01
Centrifugal pump
30 GPM at 35’ head
Pump
Suction
Pump
support
Tank
Fine mesh
screen
Return
Remove water
regulating
valve
Condenser
Globe
valves
Gas
vent
Close vent pipe
valve when pump
is running.
Priming
connection
Figure 6-33. Water-Cooled Condenser Cleaning --
Forced Circulation
6. AllowtheOakiteNo.32solutiontosoakinthetube
coils for several hours, periodically
pump-circulating it with an acid-proof pum p.
Analternatemethod maybe usedwherebyabottle(see
Figure 6-34)filledwiththesolution andattached tothe
coils by a hose can serve the same purpose by raising
andloweringofthebottle.Thesolutionmustcontactthe
scaleateverypointforthoroughde-scaling.Airpockets
in the solution should be avoided by regularly opening
thevent to release gas. Keep flames away from thevent
gases.
7. The time required for de-scaling will vary,
dependingupontheextentofthedeposits.Oneway
todeterminewhende-scalinghasbeencompletedis
to titrate the solution periodically, using titrating
equipment provided free by the Oakite Technical
Servicerepresentative. As scale is beingdissolved,
titratereadings will indicatethat the Oakite No. 32
solution is losing strength. When the reading
remains constant for a reasonable time, this is an
indication that scale has been dissolved.
8. Whende-scalingiscomplete,drainthesolutionand
flush thoroughly with water.
9. Following thewater flush, circulate a 56.7 gram (2
ounce) per 3.785 liter (1 U.S. gallon) solution of
OakiteNo.22thruthetubestoneutralize.Drainthis
solution.
10..Flush the tubes thoroughly with fresh water.
NOTE
Ifthecondensercoolingwaterisnotbeingused
as drinking water or is not re-circulated in a
closed or tower system, neutralizing is not
necessary.
11. Put the unit back in service and operate under
normal load. Check the head pressure. If normal, a
thorough de-scaling has been achieved.
What You Can Do For Further Help:
ContacttheEngineering and ServiceDepartment ofthe
OAKITE PRODUCTS CO., 19 Rector Street, New
York,NY10006U.S.A.forthenameandaddressofthe
service representative in your area.
Fill condenser with
cleaning solution. Do
not add solution more
rapidly than vent can
exhaust gases caused
by chemical action.
Condenser
Vent
pipe
1” Pipe
5’ Approximate
3’ to 4’
Figure 6-34. Water-Cooled Condenser Cleaning --
Gravity Circulation
6.29 CONTROL BOX REPAIRS
6.29.1Introduction
This procedure provides instructions for repair of t he
Carrier Transicold composite control box. Damage to
the control box may be in the form of a chip or hole, a
crack, a damaged thread insert or damage to the door
hingeinserts.Generally,t heobjectoftherepairmustbe
to ensure sufficient strength is restored to the damaged
area and the repair must keep the box water tight.
Informationonrepairkitsandrepairproceduresforeach
typeofdamageisprovidedinthefollowingparagraphs.
Ambient temperature must be above 7°C(45°F) for
proper curing of epoxy repairs.
6.29.2 Cracks
Cracksin thecontrolboxarerepairedusing afiber glass
patch over the damaged area. Materials required are
includedintheFiberglassPatchKitsuppliedwithCrack
Repair Kit, CTD part number 76-00724-00SV (see
Table 6-1 ).