Trane Sintesis Balance CMAF Installation Operation & Maintenance page 45

Figure 16 - Glycol percentage recommendation curve
45
Sound power levels
40
Discharge
35
Measurement conditions:
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
30
long) fixed to its discharge opening.
Fan
25
Unit speed
1
FWD 08 2
3
20
1
FWD 10 2
3
1
15
FWD 12 2
3
1
FWD 14 2
10
3
1
FWD 20 2
5 3
Intake
0
Measurement conditions:
-12
Measurements taken at the horizontal air intake.
Fan
Unit speed
1
FWD 08 2
3
1
FWD 10 2
1 = Critical risks of freezing
3
2 = Efficient freeze protection
1
3 = Ethylene glycol
FWD 12 2
3
4 = Propylene glycol
1
% = Glycol percentage (mass concentration)
FWD 14 2
°C = Glycol or water temperature
3
1
CAUTION!
FWD 20 2
3
1. Additional glycol beyond the recommendations will adversely affect unit performance. The unit efficiency
will be reduced and the saturated suction temperature will be reduced. For some operating conditions this effect
can be significant.
2. If additional glycol is used, then use the actual % glycol to establish the low refrigerant cutout set point with
Trane service advice.
3. The minimum low refrigerant cutout set point allowed is - 20.6°C. This minimum is established by the
solubility limits of the oil in the refrigerant.
4. With glycol application, ensure that there is no fluctuation of brine flow versus Order Write Up value, as a
reduction of flow will adversely affect unit performance and behaviour.
5. Full unit simulation is required for proper prediction of unit performance for specific operating conditions.
For information on specific conditions, contact Trane.
CG-SVX051A-GB UNT-PRC002-GB
Chilled/hot water freeze protection
Power level in dB(A), per Hz frequency band
125 250
55 50
57 54
58 57
57 51
58 54
60 58
57 51
58 54
60 58
56 62
61 66
63 69
57 63
61 66
63 69
-10 -8 -6
Water Leaving Setpoint (°C)
Power level in dB(A), per Hz frequency band
125 250
56 55
63 62
66 65
62 58
66 63
70 67
62 58
66 63
70 67
66 65
73 72
78 76
68 72
76 76
78 79
500 1000
42 37
3
47 40
50 42
45 42
48 45
50 48
1
45 42
48 45
50 48
50 48
55 53
58 56
51 49
55 53
58 56
-4 -2
500 1000
55 53
60 60
63 62
55 58
60 62
63 65
55 58
60 62
63 65
65 65
69 71
73 75
64 64
68 71
71 74
2
4
2000 4000 8000
37 31 30
30 38 40
32 40 43
34 33 28
38 39 35
40 42 39
34 33 28
38 39 35
40 42 39
39 38 36
47 46 45
50 50 49
40 39 37
47 46 45
50 50 49
0 2
2000 4000 8000
46 45 42
53 53 53
56 55 57
51 48 44
56 55 52
59 59 57
51 48 44
56 55 52
59 59 57
57 50 46
64 59 57
69 64 63
56 52 50
65 61 61
69 66 66
Overall power
dB(A)
46
50
53
48
51
54
48
51
54
56
60
63
57
60
63
4 6
Overall power
dB(A)
57
64
67
61
66
69
61
66
69
68
74
78
69
75
78
11
45