Consumption And Drop Water - Lennox SNE 2,8K Installation Manual

CONSUMPTION AND WATER PRESSURE DROP
Normally, the water condense is used across a cooling tower with water temperature around 30ºC, and water
flow avilable to work the unit with condensation temperature between 40 and 45ºC.
You are able not to use a cooling tower when the unit is near a river etc.. with enough flow and enough quality of
the water. The use of the water must be used always across a previous Analysis of water.
If the water inlet temperature is below 20ºC, It is then necessary to use a regulation valve (Option) to maintain
condensing temperature value between 40 and 45 ºC.
Depending inlet water temperature and condensation temperature needed you will be able to calculate water
consumption following the table below.
CONDENSATION TEMPERATURE AND INLET WATER TEMPERATURE (ºC)
10
UNIT
3300
SNE 2,8K
4160
SNE 3K
4550
SNE 4K
COEFFICIENTS FOR DIFFERENT AIR INLET TEMPERATURE.
For different air inlet temperature multiply the
consumption by the coefficent of this table.
Coefficients of water consumption
WATER PRESSURE DROP
100
90
80
70
60
50
40
30
20
10
0
1000
TABLE OF WATER CONSUMPTION ON UNITS SNE (L/H) (*)
DIFFERENCES BETWEEN:
15 20
1220 740
1545 945
1690 1030
SNE 2,8K - 3K
1500 2000
25 30 35
520 400 325
670 515 420
730 560 460
AIR INDOOR TEMPERATURE (WB/DB)
21/15 24/17
0,88
2500 3000
WATER FLOW (L / H)
7
40 45
270 235
350 300
385 330
27/19
0,93 1
SNE 4K
3500 4000 4500
( * ) Inlet air
temperature
27ºCWB / 19ºC DB
29/21 32/23
1,07 1,14
5000