Technibel CHGV 64 - Anti-Freeze Corrections; Sound Levels

8
9 - SOUND LEVELS
• Nominal operating conditions:
- Ambient temperature: 35°C.
• Sound-pressure level:
- Unit installed outdoors (free field) on a reflective surface.
- Measurement carried out at a distance of 10 m.
40
35
30
25
10 15 20 25 30
Distance in meters
dB to be
deducted from
the sound
power level
Power level Sound-pressure level
(dBA) (dBA)
50 78 50
64 82 54
72 87 59
80 87 59
CHGV
8 - AVAILABLE PRESSURE CURVES ON THE HYDRAULIC SYSTEM
5 6 7 8 9 10 11 12 13 14 15
0
50
100
150
200
250
300
CHGV 80
CHGV 72
CHGV 64
CHGV 50
Water flow rate (m
3
/h)
Available head (kPa)
7 - CORRECTIONS TO BE MADE WHEN USING ANTI-FREEZE
•
V
alues at apparatus outlet without tank. (See § 10.5 for tank pressure losses).
10 - ACCESSORIES
10.1 - ANTI-VIBRATION KIT
•
Kit includes:
-
1 set of 4 anti-vibration plates, thickness 25 mm - code
70600035.
- 1 set of 2 flexible hoses: length 1.5 m, Ø 1" 1/2 - code 70600034.
• IMPORTANT:
Use monopropylene glycol; a minimum rate of 15% to 20% is needed to avoid any risk of corrosion.
PRINCIPLE OF USING THE CURVES
A- Choose the percentage of glycol according to the
minimum temperature to protect the hydraulic circuit
against frost.
B - Example:
Protection at an external temperature of -15
°C, which
gives 30% monopropylene glycol (freezing points
curve).
The loss of capacity is given on the "Reduction of
cooling capacity" curve (0.94).
The new flow is given by the coefficient on the water
flow curve (1.1
13).
Likewise, to determine the new pressure drop
coef
ficient in relation to the nominal flow, read the
pressure drop curve (1.19).
Valid curves for setting temperature at the water
inlet.
1.30
1.20
1.10
1.00
0.94
0 10 20 30 40
0
-5
-10
-15
-20
-25
1.19
1.113
% Glycol in weight
Outdoor temperature °C
Correction factors
Pressure drop
Water flow
Reduction of cooling capacity
Freezing points