Lauda Alpha A, Operating Instructions Manual

Page: 23 / 52

Alpha
June 20, 2018/ YACE0092
Preparations
23
6.3 Heat transfer liquids and hoses
Approved heat transfer liquids
LAUDA
Designation
Working
temperature
range
Chemical
Designation
Viscosity
kin
Viscosity
kin
@
temperature
Size
Catalogue number
from °C
to °C
mm²/s at
20 °C
mm²/s 5 L 10 L 20 L
Aqua 90

5
– 90
decalcified
water
1 -- LZB 120 LZB 220 LZB 320
Kryo 30

-30
– 90
Monoethylen-
glycol/water
4 50 at -25 °C LZB 109 LZB 209 LZB 309


At higher temperatures

Evaporation losses

Use bath covers.
Distilled water or fully deionised water must only be used with the addition of 0,1g sodium car-
bonate (Na
2
CO
3
)/litre water, otherwise

danger of corrosion!

Water content falls after prolonged operation at higher temperatures

mixture becomes flam-
mable (flash point 119 °C)

check the mixture ratio with a dosimeter.
Safety data sheets are available on request.
Important:

The units are designed for operation with non-flammable liquids to DIN EN 61010-2-010.
Hoses
Tubing type
d
i
x t
[mm]
Temperature
range °C
Application
Catalogue
number
EPDM-tubing,
non-insulated
9 x 2 10
– 90
for all LAUDA heat transfer liquids
except for Ultra 350 and mineral oils
RKJ 111
EPDM-tubing,
non-insulated
12 x 2 10
– 90
for all LAUDA heat transfer liquids
except for Ultra 350 and mineral oils
RKJ 112
Silicone tubing,
insulated
11 -60
– 100
for all LAUDA heat transfer liquids
except silicone oils
LZS 007

Protect tubing with hose clips against slipping off!

IMPORTANT :
There are differences between “water and water”!

Tap water may be unsuitable for operation due to the calcium carbonate content

risk of calci-
fication of the stainless steel tank.

High purity water (from ion exchangers) and distilled or bidistilled water are unsuitable for opera-
tion due to the corrosive properties of these media.

High purity water and distillates are suita-
ble as a medium after the addition of 0.1 g of soda (Na
2
CO
3
, sodium carbonate) per liter of water.
LAUDA Alpha thermostats can be operated ideally with LAUDA Aqua 90, available in container sizes
of 5, 10 or 20 liters (order number LZB 120, LZB 220 or LZB 320) or with Kryo 30 (

6.3).