Hydraulic Connections; Use Of Ethylene Glycol - Uniflair RAN Series Instruction Manual

The dry cooler is factory charged with dry nitrogen, the connections are sealed with plugs (model
2300...5700).
BEFORE REMOVING THE PLUGS FROM THE CONNECTIONS, DISCHARGE THE NITROGEN BY
MEANS OF THE NEEDLE VALVE ON THE INLET MANIFOLD.
A
1
1. Unscrew the cap (E) on the connection (A);
2. Remove the black rubber seal (D): this is only used to seal the circuit charged with nitrogen
3. To put a seal (B) on the connection (A);
4. Screw the female joint (C) on to the connection (A).
Take care that the connections are correctly
made and in particular do not invert the inlet
and outlet connections (fig. 7).

USE OF ETHYLENE GLYCOL

Correction factors are given to calculate data for various glycol percentages
Percentage of glycol
Increase of water flow (%)
Increase in distributed pressure drop (%)
Operation Limits
Minimum fluid temperature with unit operating
Percentage of ethylene glycol by weight
Freezing
Caution:
For water without glycol, make sure that the ambient temperature is always higher than 0°C. To prevent freezing during
arrest, drain off the dry cooler by blowing air several times and introduce Glycol.
RAN-RAL - Rev 1.0. - 11-10-2002 IT - EN

HYDRAULIC CONNECTIONS

A
D
E
E
2
OK
5%
+ 2 %
+ 7 %
5 °C
0 °C
опубликовано topclimat.ru
MANUALE DI ISTRUZIONI / INSTRUCTION MANUAL
RADIATORI REMOTI / DRY COOLERS
A
B
3
Fig. 7.a.
10% 15%
+ 4.5 % + 6.5 %
+ 14 % + 24 %
3 °C 0 °C
0% 10% 15%
- 4 °C - 7 °C
A
B
C
4
;
20% 25% 30%
+ 9 % + 11.5 % + 14 %
+ 33 % + 45 % + 57 %
- 3 °C - 6 °C
20% 25%
- 10 °C - 13°C
Fig. 6.
Fig. 7.b.
- 10 °C
30%
- 17 °C
23 (32)