heat-timer SQ-Elite-EXt, Инструкция по установке и эксплуатации

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SQ-Elite-MV & SQ-Elite-EXT Installation Manual 35
sQ-elite-MV does not Move the floating actuator
• First check the valve wiring -
The SQ-Elite-MV does not source power to the actuator. Instead, a separate power source must be
wired to the actuator as shown on page
1
2
for the floating output.
• Check relay operation - Remove any wires connected to terminals
21 through 24 . Set the Valve mode to Close and check for
continuity across terminals
21 and 22 and across terminals 23 and 24
. The meter should register continuity across terminals
21 and
22
and should register no continuity across terminals
23 and 24.
Otherwise, the SQ-Elite-MV may be damaged. Then, set the Valve
mode to Open and check for continuity across terminals
23 and 24 and across terminals 23 and 24 .. The meter should register no
continuity across terminals
21 and 22
and should register continuity across terminals
23 and 24.
Otherwise, the SQ-Elite-MV may
be damaged.
Boilers are short-cycling
• Minimum Runtime - Increase the Minimum Runtime only if all boilers tend to short-cycle.
• Last Stage Hold - Increase the Last Stage Hold only if the lead boiler tends to short-cycle in mild weather conditions.
seQ system is overshooting or undershooting
• Reaction Time and Minimum Runtime - If the SEQ System is overshooting or undershooting, adjust Minimum Runtime or the
Reaction Time. That depends on if the stages are brought on fast and were not allowed to turn off until the Minimum Runtime
elapsed. In that case adjust the Minimum Runtime. However, if the stages were brought on slowly, but were allowed to turn off
quickly. Then, adjust the Reaction Time. See Reaction Time and Minimum Runtime on page
25.
• PID vs OSS - If the application the SEQ System is used on requires fast response that the normal PID mode cannot provide, try
using the OSS mode and adjust the Throttle Range according to the system requirements. See Control Logic on page
2
0
.