Lennox SNE 2, Installation Manual

Page: 7 / 16

7
1000 1500 2000 2500 3000 3500 4000 4500 5000
0
10
20
30
40
50
60
70
80
90
100
WATER FLOW (L / H)
WATER PRESSURE DROP Kpa
10 15 45 20 25 30
TABLE OF WATER CONSUMPTION ON UNITS SNE (L/H) (*)
DIFFERENCES BETWEEN:
CONDENSATION TEMPERATURE AND INLET WATER TEMPERATURE (ºC)
35 40
( * ) Inlet air
temperature
27ºCWB / 19ºC DB
SNE 2,8K
3300 1220 235 740 520 400 325 270
SNE 3K
4160 1545 300 945 670 515 420 350
SNE 4K
4550 1690 330 1030 730 560 460 385
COEFFICIENTS FOR DIFFERENT AIR INLET TEMPERATURE.
Coefficients of water consumption
32/23
1,14
21/15
0,88
24/17
0,93
AIR INDOOR TEMPERATURE (WB/DB)
27/19
1
29/21
1,07
CONSUMPTION AND WATER PRESSURE DROP
UNIT
For different air inlet temperature multiply the
consumption by the coefficent of this table.
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.
WATER PRESSURE DROP
SNE 4K
SNE 2,8K - 3K