Chilled Water Piping Recommendations - Trane GVAF Series Installation Operation & Maintenance

Drainage
A large capacity drain must be provided for water vessel
drain-down during shutdown or repair. The evaporator is
provided with drain connections. An air vent on top of the
Sound power levels
evaporator water box prevents vacuum by removing air from
evaporator for complete drainage.
Discharge
Water Treatment
Measurement conditions:
In the evaporator the following material are in contact with
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
water:
long) fixed to its discharge opening.
• Water boxes are made of cast iron (GJL250 EN-code)
• Tube plates are made of steel (P265GH code)
Fan
Unit speed
• Tubes are made of copper
1
• Turbulators when present in evaporator tubes are made
FWD 08 2
3
of phosphorous brass.
1
When the unit is supplied with hydraulic module, the
FWD 10 2
following additional materials are in contact with water: 3
1
• Pump frame and connections are made of cast iron
FWD 12 2
3
• Water pipes are made of iron
1
• Pipe sealings are made of EPDM rubber (ethylene
FWD 14 2
3
propylene diene monomer rubber)
1
• Pump sealings are made of silicon carbide
FWD 20 2
3
• Strainer is made of stainless steel
Intake
Measurement conditions:
Measurements taken at the horizontal air intake.
Fan
Unit speed
1
FWD 08 2
3
1
FWD 10 2
3
1
FWD 12 2
3
1
FWD 14 2
3
1
FWD 20 2
3
CTV-SVX009D-GB UNT-PRC002-GB

Chilled Water Piping Recommendations

Power level in dB(A), per Hz frequency band
125 250 500
55 50 42
57 54 47
58 57 50
57 51 45
58 54 48
60 58 50
57 51 45
58 54 48
60 58 50
56 62 50
61 66 55
63 69 58
57 63 51
61 66 55
63 69 58
Power level in dB(A), per Hz frequency band
125 250 500
56 55 55
63 62 60
66 65 63
62 58 55
66 63 60
70 67 63
62 58 55
66 63 60
70 67 63
66 65 65
73 72 69
78 76 73
68 72 64
76 76 68
78 79 71
Dirt, scale, products of corrosion, and other foreign material
will adversely affect heat transfer between the water and
system components. Foreign matter in the chilled-water
system can also increase pressure drop and consequently,
reduce water flow. Proper water treatment must be
determined locally, depending on the type of system and
local water characteristics.
Neither salt nor brackish water is recommended for use
in Trane air-cooled chillers. Use of either will lead to an
unpredictably shorter life cycle. Trane encourages the
employment of a reputable water treatment specialist,
familiar with local water conditions, to assist in this
1000 2000
determination and in the establishment of a proper water
37 37
treatment program.
40 30
42 32
42 34
CAUTION! If using an acidic commercial flushing solution,
45 38
construct a temporary bypass around the unit to prevent
48 40
damage to internal components of the evaporator. Trane
42 34
assumes no responsibility for equipment failures which
45 38
results from untreated or improperly treated water or saline
48 40
48 39
or brackish water. If calcium chloride is used for water
53 47
treatment, an applicable corrosion inhibitor must also be
56 50
used. Failure to do so may result in damage to system
49 40
components. Do not use untreated or improperly treated
53 47
56 50
water. Equipment damage may occur.
1000 2000
53 46
60 53
62 56
58 51
62 56
65 59
58 51
62 56
65 59
65 57
71 64
75 69
64 56
71 65
74 69
Overall power
4000 8000 dB(A)
31 30 46
38 40 50
40 43 53
33 28 48
39 35 51
42 39 54
33 28 48
39 35 51
42 39 54
38 36 56
46 45 60
50 49 63
39 37 57
46 45 60
50 49 63
Overall power
4000 8000 dB(A)
45 42 57
53 53 64
55 57 67
48 44 61
55 52 66
59 57 69
48 44 61
55 52 66
59 57 69
50 46 68
59 57 74
64 63 78
52 50 69
61 61 75
66 66 78
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