32
CVHE-SVN04M-EN
13. Reinstall all other chiller components which were
removed. Reconnect the inlet vane linkages.
14. Torque all bolts to specifications listed in Table 13,
p. 32.
Table 13. Bolt torques
Non-gasket Joints Bolt Torques
Bolt Size (in) Torque (ft·lb)
1/2
70
5/8
150
3/4
250
All Other Metal Joints (O-Ring Joins) Shall Use the Following
Torques
Bolt Size (in)
Torque (ft·lb)
Min. Max
1/4
5 7
5/16
11 15
3/8
22 27
1/2
55 75
5/8
120 165
3/4
200 280
1 400 550
All Joints with Flat Elastomeric Gaskets Shall Use the Following
Bolt Torque
Bolt Size (in)
Torque (ft·lb)
Min. Max
5/16
8 12
3/8
12 18
1/2
33 50
5/8
70 90
3/4
105 155
15. Reconnect the previously cut compressor/motor oil
supply and return lines and the motor cooling lines
using the factory-supplied couplings.
Brazing
WWAARRNNIINNGG
EExxpplloossiioonn HHaazzaarrdd aanndd DDeeaaddllyy GGaasseess!!
FFaaiilluurree ttoo ffoollllooww aallll pprrooppeerr ssaaffee rreeffrriiggeerraanntt
hhaannddlliinngg pprraaccttiicceess ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss
iinnjjuurryy..
NNeevveerr ssoollddeerr,, bbrraazzee oorr wweelldd oonn rreeffrriiggeerraanntt lliinneess oorr
aannyy uunniitt ccoommppoonneennttss tthhaatt aarree aabboovvee aattmmoosspphheerriicc
pprreessssuurree oorr wwhheerree rreeffrriiggeerraanntt mmaayy bbee pprreesseenntt..
AAllwwaayyss rreemmoovvee rreeffrriiggeerraanntt bbyy ffoolllloowwiinngg tthhee
gguuiiddeelliinneess eessttaabblliisshheedd bbyy tthhee EEPPAA FFeeddeerraall CClleeaann
AAiirr AAcctt oorr ootthheerr ssttaattee oorr llooccaall ccooddeess aass aapppprroopprriiaattee..
AAfftteerr rreeffrriiggeerraanntt rreemmoovvaall,, uussee ddrryy nniittrrooggeenn ttoo
bbrriinngg ssyysstteemm bbaacckk ttoo aattmmoosspphheerriicc pprreessssuurree bbeeffoorree
ooppeenniinngg ssyysstteemm ffoorr rreeppaaiirrss.. MMiixxttuurreess ooff
rreeffrriiggeerraannttss aanndd aaiirr uunnddeerr pprreessssuurree mmaayy bbeeccoommee
ccoommbbuussttiibbllee iinn tthhee pprreesseennccee ooff aann iiggnniittiioonn ssoouurrccee
lleeaaddiinngg ttoo aann eexxpplloossiioonn.. EExxcceessssiivvee hheeaatt ffrroomm
ssoollddeerriinngg,, bbrraazziinngg oorr wweellddiinngg wwiitthh rreeffrriiggeerraanntt
vvaappoorrss pprreesseenntt ccaann ffoorrmm hhiigghhllyy ttooxxiicc ggaasseess aanndd
eexxttrreemmeellyy ccoorrrroossiivvee aacciiddss..
Except as noted in the following, braze with the
following filler metals:
• Braze all copper-to-copper joints with A.W.S. BcuP-
6 filler metal.
• Braze all copper-to-brass joints with A.W.S. BcuP-6
filler metal using white or black brazing flux.
• Braze all other joints with A.W.S. Bag-28 filler
metal.
Bleed dry nitrogen through the lines while brazing to
prevent the formation of oxides which can contaminate
the oil and refrigerant systems.
NNoottee:: Use silver soldering with 96% Sn-4% Ag (for
example, J.W. Harris Co. Stay Brite
®
) to replace
brazing when the heat from brazing would be
detrimental to the immediate or nearby parts.
EExxaammpplleess::
1. Joints next to threaded joints in which the copper
or brass threads become too soft and/or Loctite®
loses its sealing capability due to excess heat.
2. Joints next to valves in which the valves cannot be
taken apart or are not recommended for brazing.
Final Installation Procedures
After the chiller has been moved to the equipment
room and reassembled under Trane supervision, leak
testing, and evacuation can be performed by Trane or
under Trane supervision. Upon verification of leak
tightness, installation can proceed for unit piping,
wiring, etc. After installation has been completed, fill
out CTV-ADF001*-EN (CenTraVac
™
Installation
Completion Check Sheet and Request for Trane
Service) to schedule the startup; the chiller
RReeaasssseemmbbllyy
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