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3.3 Installation Step 3: Installing Sample Lines
Use only FEP Teflon™ tubing to assure proper sample transport. Other types of tubing are not
sufficiently inert. "Specifications" on page 104 , for tube specifications. FEP tubing can be
ordered from Honeywell.
Install sample lines from each location to the VC4™ system, allowing room to access the back
panel. This procedure involves:
Sample Line Installation Requirements
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Sample Line Connections
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Installing Sample Line Particulate Filters
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Honeywell supplies FEP grade Teflon tubing with all new monitors. This tubing is manufactured
to our own strict specifications and has been purged of all byproducts of the manufacturing
process. On occasions, users have supplied their own FEP type tubing. Should you choose to
use your own tubing, be advised that some brands of FEP tubing off-gas small amounts of HF,
which can be detected on start up by Honeywell monitors configured for detecting mineral
acids gases (HBr, HCl, HF, NF
1. You have installed the correct Chemcassette™, and
2. Your monitor reads zero.
1/4 in. (6.35 mm) O.D. x 0.190in. (4.83 mm) (Thin wall)
3.3.1 Sample Line Installation Requirements
Follow the general requirements listed below when installing sample lines.
Sample lines should not exceed 400 ft. (122m) in length.
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Route all lines as direct as possible to improve transport time.
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Avoid running sample lines through areas of great temperature extremes, such as adjacent
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to steam or chiller lines.
Sample lines should not be crimped, bent to less than a 12 in. (30.5 cm) radius, or placed in
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an area where weight could collapse the tubing. Sample lines should be easily accessible for
periodic inspection.
Where possible, leave as many bends exposed for periodic visual inspection of the line for
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kinked or damaged tubing.
Check each sample line installation for seal integrity after completing installation of the
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VC4™ system. See Leak Checking Sample Lines, for the leak check procedure. Also use this
procedure to detect leaking or severed tubing after events, such as construction, which may
have affected the integrity of the tubing.
Unused points require a filter. Filter kit 1295A0702 is recommended.
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If the VC4™ system is installed with a Chemcassette™ tape, the optics may need cleaning
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before activating a previously unused point(s).
VC4™
). Before enabling building alarm systems, make certain that:
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