Xylem H-3531 FlashLite - Manual (Page 14)

2-2 Installation
H-3531
Figure 2-1 Gas-Purge Stream Gauge Installation
2.3 General Installation Recommended Steps
1. Find a suitable location for the H-3531 FlashLite™. Care should be taken to place
it where it will not be jarred, crushed or dropped. Remember, the H-3531
FlashLite™ is a precision instrument. If mounted vertically, the sides of the
enclosure with connectors should not be facing up. The enclosure of the H-3531
FlashLite™ is designed to be water resistant but not water proof. If the H-3531
FlashLite™ is mounted vertically, the possibility of damage to the circuit boards
due to condensation, if moisture does penetrate the enclosure, is greatly reduced.
2. Connect the pressure line between the H-3531 FlashLite™ and the bubbler system.
This can be done using the H-350-Install kit, where all the required hardware is
provided. If you did not purchase the H-350-Install kit, you will need to procure the
parts from your local plumbing supplier. You will need a 1/8" NPT male tubing
fitting for the pressure input port. It is recommended that you use 1/8" copper
tubing. The proper ferrules must be used to insure there are no leaks. The male 1/8"
NPT fitting screws into the pressure input port of the H-3531 connector panel
shown in Figure 2-1. On the bubbler manifold, you will need a corresponding
tubing fitting. Generally, a 1/4" NPT female to 1/8" tubing fitting is called for. The
NPT threads of these fittings need a coat of Teflon tape or anaerobic thread dope.
This helps in preventing leaks.
We strongly recommend that you use a pressure relief valve on the pressure input. If you
purchase one, make sure that the pressure rating matches the pressure range of your H-
3531 FlashLite™. The pressure input requires a 1/8" NPT Male fitting. You should be
careful not to over-tighten the connector when installing it.