7
Consider the following when installing the system.
1. Be sure to consider all factors when selecting materials.
2. Do not use oil or grease on fi ttings.
3. Be sure that all fi ttings are secure and leak tight. PTFE tape should be used on pipe threads.
4. If constant pressure is required, a regulator will need to be installed. If the regulator is not in
combination with the Switchover system (such as with the 526/7 XX1X through XX7X), then a
decision will need to be made as to where downstream after the Switchover system the regulator
will need to be installed.
5. Captured vent spring case: The captured vent kit (550 0001) can be added to the 526 series as
an ac ces so ry. This vent kit is added to the spring case to redirect gas in the event of a di a phragm
failure. When installing the vent kit, be sure to connect suitable tubing from the vent kit fi tting to
the safe discharge area.
6
Relief valve: The purpose of the relief valve is to protect the autoswitch system and its com po nents
only. If there is pressure sensitive equipment downstream of the autoswitch system, it is
recommended that a relief valve (534 Series) be installed in the line to protect this equipment.
7. Purge devices: These devices are op tion al. Purge de vic es are used to re move toxic, cor ro sive, or
fl ammable gas es from the cus tom er’s system to a safe discharge area. This is particularly help ful
when an in ter nal problem occurs (such as regulator malfunction).
8. Pressure switch gauges: These devices are optional. Used in conjunction with a remote alarm,
they provide a warning that one or both of the cylinder banks is about to be depleted. The pressure
switch gauges have a normally open switch. When the indicated pressure is above the gauge set
point, the switch is closed and will allow current fl ow in the circuit. Refer to the instructions for the
appropriate remote alarm for wiring instructions.
Inlet Gauge: Red Tab Indicates
Pressure Switch Setpoint
MAX POWER 10W, 10VA
SWITCHING CURRENT - 0.5 AMPS
(NON-INDUCTIVE)
Figure 2 - Location of Relief Valve
Relief Valve
(1/4" NPT Valve)
