Timer Adjustment - Thermo Scientific SOLA II Flare User Manual

Appendix F
The X-Purge System

Timer Adjustment

The required time delay for safe operation is determined at the factory.
Adjustment of the time delay should not normally be required. Do not adjust
the time delay unless you are absolutely sure that you will not create a
potentially hazardous situation.
Caution Do not open the explosion proof housing for the X-Purge unless the
area is known to be non-hazardous or the power is removed from the X-Purge
unit. ▲
Caution Do not decrease the timer setting lower than the value specified in the
application notes provided with the system or lower than the initial setting
when received from Thermo Scientific. ▲
Caution If the timer setting is too short, the analyzer system is not purged
adequately before power is applied. This can result in equipment damage and
injury to personnel. ▲
The time delay relay uses digital switches to set the length of delay before
applying power to the analyzer system. The number of seconds for the delay
can be determined by adding the numbers together for all switches that are set
to the On position. (The switches are located on the top of the time delay relay
inside the X-Purge housing.) For example, if switches 256, 128, 64, and 32 are
On, the time delay is 8 minutes (i.e. 256 + 128 + 64 + 32 = 480 seconds).
When replacing the time delay relay, the switches on the new relay must be set
the same as on the relay being replaced.
Thermo Scientific SOLA II Flare User Manual F-9