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

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SQ-Elite-MV & SQ-Elite-EXT Installation Manual 25
seQ settIngs
Hold Button: MENU/<SEQ Settings>
The SEQ Settings menu provide access to adjusting and fine-tuning the boiler loop and stage
system for enhanced comfort and better fuel savings. The SQ-Elite-MV behaves differently
based on the selected Control Modes (see Startup Settings on page 13).
- STAGE SETTINGS --
Reaction Time 1min
Purge Delay 0.0min
Min Runtime 2min
Standby Delay 10min
Last Stge Hold 5 F
Throttle 2 F
<Lead Settings>
BACK SELECT
seQ stage settIngs
Hold Button: MENU/<SEQ Settings>/<System Settings>/<Stage Settings>
reactIon tIMe
(available in pId only)
Adjustable 1 - 10 minutes Default: 2 minutes
Hold Button: MENU/<SEQ Settings>/<System Settings>/<Stage Settings>/Reaction time
• It is the amount of time it takes a single stage to affect the system.
• After the SQ-Elite-MV turns on a stage trying to meet a set point, it will not turn on another
stage until the reaction time has elapsed. Then, it will recalculate if a stage is need.
-- REACTION TIME --
2min
[
]
BACK SAVE
• To determine the optimum time, in a heating system start with a hot system. Then, turn on a single stage and calculate time it takes
until the system begins to respond. That period should be set as the Reaction Time. (See PID Operation under Control Logic on
page 2
0)
purge delay
(available in pId only)
Adjustable 0.0 - 10.0 minutes Default: 0.0 minutes
Hold Button: MENU/<SEQ Settings>/<System Settings>/<Stage Settings>/Purge Delay
• Most large boilers must go through a purge cycle before they are brought online.
• When the SQ-Elite-MV activates a boiler (the lowest stage on a boiler), it does not start to
calculate its output until the Purge Delay is over. This allows the boiler to fully come online
and begin producing output.
(See PID Operation under Control Logic on page
2
0)
--- PURGE DELAY ----
0.0min
[ ]
BACK SAVE
• The Purge Delay helps prevent short cycling of a newly activated boilers. Once the lowest boiler stage is activated, it
MUST
run
through the entire Purge Delay period.
• The minimum Purge Delay setting
MUST
be set to the time required by the boiler manufacturer's specification.
MInIMuM runtIMe
(available in pId only)
Adjustable 1 - 60 minutes Default: 2 minutes
Hold Button: MENU/<SEQ Settings>/<System Settings>/<Stage Settings>/Min Runtime
• This is the minimum amount of time any stage will run.
• For the lowest firing stage on a boiler, the Minimum Runtime starts after the purge cycle.
- MINIMUM RUNTIME -
2min
[ ]
BACK SAVE
• This timer does not apply to the last stage online. The Last Stage Hold applies in that case.
• Initially, set the Min Runtime to half the Reaction Time. (See PID Operation under Control Logic on page
2
0)
• If the system tends to overshoot, reduce the Min Runtime. If boilers tends to short cycle, increase the Min Runtime.
standBy delay
(available in pId only)
Adjustable 1 - 60 minutes Default: 10 minutes
Hold Button: MENU/<SEQ Settings>/<System Settings>/<Stage Settings>/Standby Delay
• The Standby Delay Time only applies to boilers in Standby Mode. See Mode on page 3
2.
-- STANDBY DELAY --
10min
[ ]
BACK SAVE
• A Standby boiler can only be activated after all the boilers in Auto Mode have run for the full Standby Time.
• Standby boilers are used for backup or extreme load conditions only. A Standby Stage can never be a Lead Stage
• The full Standby Delay Time must always elapse regardless of what happens to system temperature. Therefore, shorter Standby
Times will result in smoother set point operation in extreme conditions. Longer Standby Times may prevent a Standby boiler from
starting if the other boilers can eventually meet the load or if the load decreases.
• When setting Standby Time, remember that it will be added to the Reaction Time for the first stage on the first Standby boiler. The
following stages start time will rely on Pre-Purge and Reaction Time.