GHM DeltaOHM HD37AB1347, Руководство по эксплуатации

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HD37AB1347
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V3.0
S
ECTION
This item of the Air Speed menu allows to set the section for the flow rate
calculation.
To enter the Section submenu, proceed as follows.
1. Use the arrows ▼▲ to select Section;
2. Press ENTER;
3. The following message appears:
AIR FLOW AIR FLOW
SECTION SETTING SECTION SETTING
0.0001 m
2
9999.9 in
2
(max = 6.4515 m
2
) (max = 9999.9 in
2
)
◄► select ◄► select
▼▲ set ▼▲ set
<ENTER> confirm <ENTER> confirm
<MEM>unit of measure <MEM>unit of measure
4. Use the arrows ◄► to select the digit to be changed
5. Use the arrows ▼▲ to set the value of the selected digit
6. Press MEM to change the section measure unit between m
2
or inch
2
7. Press ENTER to confirm or press ESC more times to escape from the various
menu levels
8. Press MENU to exit directly from the main menu.
V
ENTILATION
R
ATE
To calculate the Ventilation Rate you need the following parameters:
• Calculation of the percentage of outdoor air inlet in the environment (%
Outdoor Air)
• Calculation of the air flow circulating in the environment being examined;
•
Number of people usually present in the environment being examined.
D
EFINITION OF
% O
UTDOOR
A
IR
The percentage of air inlet in the environment (% Outdoor Air) can be calculated
measuring the CO
2
Carbon Dioxide or the Temperature T.
Generally, you should measure the CO
2
Carbon Dioxide when there is a lot of people
in the environment being examined. Instead, you should use the temperature T when
the indoor/outdoor temperature difference is very large.
To calculate the outdoor air percentage, you need to detect CO2 concentration or
temperature T in three different points: outdoor air, inlet air and return air, using the
following equation:
% 100
) (
) (
%
⋅
−
−
=
O R
S R
X X
X X
OA