Spirax Sarco SX100e - Page 4

IM-S27-12 CH Issue 14
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Table 1 Hardware configuration - external options
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9. The SX100e has only two heating programs offered when running in each of the stand alone
modes:
- PROG 1 - TIMED
- PROG 2 - CONTINUOUS
10. Each program now has only three segments. These are:
- SEGMENT 1 RAMP UP
- SEGMENT 2 DWELL (MAINTAINS TEMPERATURE AT TARGET SET POINT)
- SEGMENT 3 RAMP DOWN (TO FINAL SET POINT)
11. In BMS mode - only programs 2 to 8 are available. These can be configured for temperatures
and ramp times, but heating start and heating finish control is from the external building
management system.
12. If power to the controller is switched off and then subsequently turned back on, any program
which is set to run at that time will re-start automatically and ramp up to the target set
point.
13. If External option is set to 'BOTH' a feedback to the run input on the controller can be used
to terminate a program should, for instance the circulating water pump fail. When the
feedback signal is re-established the program will then ramp back up to the target set point.
14. When changing from one program to another in stand alone or in BMS mode, the set point
temperature will ramp up or down as appropriate to the new value. It is not now necessary
to stop running the current program before changing to the next.
Note: there may be a delay of up to a minute before the program starts automatically