30
REMKO PWW
Calculation example and explanation
We reserve the right to make changes to dimensions and design in the interest of technical advances.
1. Determination of the air volume V
L
(m
3
/h)
The following data is provided
in the ratings tables (page 30).
Air capacity
V
= 5400/4300 m
3
/h
Heat output
Q
= 50.1/42.7 kW
Air outlet temp.
t
L2
= 43/45°C
this results in an air heating of
∆
t
= 28/30 K
The individual pressure difference values D
(see page 31) are added:
Filter box FK
7
Air outlet nozzle AD
9
Total difference =
16
Solution from the diagram:
V
L
= 3400/2400 m
3
/h
The heat outputs shown in the ratingtables are subject to variation as a result of:
Reduced air volumes with additionally mounted accessories such as
(mixed-air box, filter box, air outlet nozzle, etc.). Observe pressure difference values!
Determination of heat output and air volume when using accessories:
Actual:
Unit type
PWW 80-3
with filter box FK
with ceiling air outlet nozzle AD
Heating medium PWW 90/70
Air inlet temperature t
L1
= 15°C
Required:
Air volume
V
L
(m
3
/h)
Heat output
Q
L
(kw)
Air outlet temperature
t
L2
(°C)
Heating medium resistance
∆
p
W
(kPa)
