Reznor, RHC21 4000 Installation EN May 2021 D301334 Issue 0 Page No 15 of 56
The chart below indicates the probability of
condensation forming within the tubes with
reference to:
• the temperature rise of the air through the
module (around the tubes)
• the inlet air temperature passing over the
heat exchanger.
As a function of the expected minimum inlet air
temperature, the minimum required temperature
rise (to avoid condensation) must be derived
from the chart.
EURO-C 4000 R(JL)
EURO-C 4000 D(JL)
CONDENSATION POINT
-20
░
C
0
░
C
20
░
C
40K
20K
0K
T
T
INLET AIR TEMPERATURE
30K
CONDENSATION ZONE
AT THE HEAT EXCHANGER
10K
TEMPERATURE RISE OVER THE HEAT EXCHANGER
Figure 5 Dewpoint occurrence chart (condensation zone)
Example :
• expected minimum inlet temperature = -5°C
• minimum required temperature rise shown on the chart = +13°K
Table 1 indicates the heat output (kW) of the different models.
The maximum allowable airflow through the module (duct channel) around the tubes can be
calculated as follows
Example 1: Tmin = 13K (with minimum inlet temperature = -5°C)
model 4075-09 at 100% heat output : 76.04kW results into Vmax = 17088m³/h
76.04kW
17088
