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2. Insert the pitot tube and mark the two remaining holes for the
mounting screws.
3. Punch or drill the two marked holes.
4. Note the direction of airflow in the duct (see View in Direction of A)
above.
5. Note the marking on the pitot tube flange and insert the tube so that
it is properly aligned with the airflow.
6. To ensure an airtight seal, make sure the mounting surface of the
duct is clear of dirt or obstructions. Then, attach the pitot tube to the
duct with sheet metal screws or rivets.
7. On top of the sensor, unscrew the protective caps from the tube
connectors.
8. Check the length of the tubing before attaching to the sensor. The
tubing should connect without stretching or pulling. If the length is
long enough to create a loop or bind in the tubing, it should be
shortened.
9. To shorten the tubing, remove the connectors that attach to the
sensor and cut the tubing to the required length.
10. Replace the tubing connectors by using a twisting or screwing
motion.Verify the connection is secure.
Note:
If the tubing length has been shortened, be sure the in-
line filter is replaced on the pitot tube connector marked
with an "H" as shown in Figure 2, View in Direction of
A (on the previous page).
11. Complete the installation by screwing the tube connectors to the
input ports on the sensor. The tubing connectors can be attached to
either input port. It will not affect the performance of the sensor.
Accessory Enclosures
Three kinds of accessory enclosures are listed below, and two are shown
in Figure 3 below.
•
Model 1508 Duct Mount Enclosure (Aspiration Box) - Any 8000
product can be installed inside this enclosure.
•
Model 1551 Outside Air Measurement Enclosure - This NEMA-
3R enclosure is weatherproof for measuring outside air CO
centrations. It also includes heat stabilizers.
•
Model 1505 Harsh Environment Enclosure - For extreme envi-
ronments where the sensor might be subjected to condensation or
water spray such as those found in greenhouses or breweries-
NEMA-3R rated.
Figure 3: Accessory Enclosures
Typical Wiring Diagrams
Page 2
The typical wiring diagrams appear in Figure 4 through Figure 8
below.
AC Power 3-Wire System
L2
L1
18-30 VAC RMS
2
1
8
7
Input
Ventostat
Mounting Bracket
Figure 4: AC Power 3/4 Wires System - Diagrams
Using the Relay Contacts
18-30 VAC RMS
L2
L1
8
7
2
1
Input
Common
Ventostat
Mounting Bracket
Figure 5: Relay Contacts and Lennox L-Series
Lennox L-Series w/Johnson Controls
Metasys UNT or Facilitator FA-UNT
8
7
6
5
con-
2
8
7
2
1
Input
Common
Ventostat Mounting Bracket
Figure 6: Lennox L-Series/Mounting Bracket Diagrams
Honeywell M7415 Damper Actuator with W7459 Logic Module
18-30 VAC RMS
L2
L1
2
1
8
Input
Common
Ventostat Mounting Bracket
Figure 7: Damper Actuator and W7459 Logic Module
Isolated AC Power 4-Wire System
L1
L2
18-30 VAC RMS
Use Either Output
0-10Vout
4-20mAout
6
5
4
3
2
1
1
2
Input
®
Mounting Bracket
Lennox L-Series
TB1
6
7
6
5
4
3
2
1
2
1
NC
NO
Input
Common
COM
®
Ventostat Mounting Bracket
Diagrams
8-Pin and 2-Pin Terminal
Block Pin Designations on
the Ventostat Mounting Bracket
4
3
2
TB1
1
6
5
3
2
1
4
2
1
Input
Mounting Bracket
Optional High
Honeywell
and/or Low
Q769C 0-10 Vdc
Temp Swtich
Adaptor
Black
White
7
6
5
4
3
2
1
Front View
(P1)
(P)
Rear View
Diagrams
Telaire Ventostat™ 8000 Series
0-10Vout
Signal Ground
4-20mAout
8
7
6
5
4
3
2
1
Ventostat
®
8 9 10 11 12 13 14
15
16
8
7
6
5
4
3
2
1
NC
NO
COM
8
7
6
5
4
3
2
1
Ventostat
®
Honeywell Damper
Actuator M7415 and
W7459 Logic Module
P1
P
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