AB-5963
6
Installation
Installation requirements
•
Select a location where the typical temperature and
humidity of the measured gas can be sensed with the
wind speed specified.
•
Make sure that the entire probe is immersed in the
measured gas. Also, make sure that airflow passes
perpendicular to the side of the probe.
•
Leave adequate maintenance clearance in front of the
housing cover.
•
When installing in steam-heating AHU, make sure the
probe is not directly exposed to the high-temperature
steam that exceeds the probe allowable operating
condition.
•
When installing the probe pointing upward, do not allow
dew condensation on the probe. Otherwise, dew
condensation stays on the grooves of the filter cap,
causing measuring error (until it gets dried.).
CAUTION
•
Do not step on the product. External force can
damage the product.
Installing Models HTY7903, HY7903 series
(for general AHU duct insertion)
1) Prepare the dedicated mounting bracket.
Attach the indicator label for mounting hole at the probe
mounting position, and make a mounting hole on the
duct.
Figure 2. Indicator label on the duct
2) Fix the mounting bracket onto the duct with M4 screws
(supplied with the bracket), inserting packing between
the duct and the bracket. (The side with longer
protruding part needs to face outward. See Fig. 3.)
Figure 3. Mounting bracket on the duct
3) Cover the duct with an insulating material. (If the duct is
already covered with it, partially remove the insulating
material for the bracket. Then, fill the clearance between
the bracket and the duct with the insulating material after
fixing the bracket.)
Figure 4. Duct and the mounting bracket
covered with insulating material
4) Turn the main unit stopper 45 degrees (from ‘a’ to ‘b’
shown in Fig. 5) to unlock, and insert the probe of the
main unit into the bracket as the main unit claws and the
bracket slits match.
Figure 5. Mounting the main unit on the duct
(with the mounting bracket)
5) Completely insert the probe into the duct. Then, fix the
probe and the bracket by turning the stopper 45 degrees
(from ‘b’ to ‘a’ shown in Fig. 6) to lock.
Figure 6. Fixing the main unit on the duct
(with the mounting bracket)
Air flow
Duct
Indicator label
Air flow
Duct
Packing
Mounting
bracket
Air flow
Insulating
material
Stopper
Claw
Main unit of
Model HTY7903/
Model HY7903
a
b
45
°
b a