Spirax Sarco R1C, Installation And Maintenance Instructions Manual, Page: 3 / 12

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IM-P087-33 MI Issue 6
2.1 Introduction
The R1C steam trap failure monitor will continually monitor the performance of a steam trap
when used in conjunction with a Spiratec sensor chamber and sensor or a steam trap with
integral sensor. It will indicate whether a trap is operating correctly, passing live steam or has
failed closed by means of coloured trap status lights on the unit. Analogue and digital outputs
allow it to be connected directly to BEMS/EMS to indicate steam trap status remotely.
To detect a steam trap that is leaking steam, the R1C is used in conjunction with a Spiratec
sensor chamber or steam trap fitted with a standard SS1 Spiratec sensor.
To detect a steam trap that is leaking steam or is waterlogged, the R1C is used in conjunction
with a Spiratec sensor chamber or steam trap fitted with a WLS1 waterlogging sensor
assembly.
2.2 General description
The R1C steam trap failure monitor constantly measures the conditions in the steam line
through a Spiratec sensor fitted in the sensor chamber or steam trap.
If a steam trap is operating correctly, condensate will collect and submerge the sensor. The R1C
monitor measures the resistance at the SS1 sensor, detecting whether the sensor is submerged
in condensate or surrounded by steam. In the case of steam leakage (i.e. the trap has failed
open), steam will blast through the line clearing the condensate and exposing the SS1 sensor to
steam. The R1C monitor detects the high resistance due to the presence of steam and shows a
fail open signal.
The WLS1 combined steam leak and waterlogging sensor monitors steam leakage in the same
way as above, but also has a built in temperature sensor. When a trap fails closed, the
condensate which backs up will start to cool. The R1C monitor detects this drop in temperature
and shows a fail closed signal.
The R1C is supplied with steam leak and waterlogging values set ready for use. These values
may be changed using internal switches if required (see Section 4, Commissioning, for details).
2. General product information