heat-timer Mini-MOD, Инструкция по установке и эксплуатации

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30 Heat-Timer Corp.
059040-00 C
IgnItIon %
Adjustable from 1% to 50% Default: 1%
Button: STAGE/Ignition %
• The Ignition Point is the percent of modulation that must be attained before the unit can be
activated.
• For most modern power draft units, the Ignition Point should be set at 1%.
• Older units or atmospheric units may require the modulating fuel valve to be open from 20-
50% before proper ignition can be attained. Check with the boiler manufacturer if you are in
doubt about the minimum position of the fuel valve for ignition.
------ STAGE A -------
IGNITION POINT
1%
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ModulatIon start %
Adjustable from 0% to 100% Default: 75%
Button: STAGE/Mod Start %
• The Modulation Start determines at what modulation percent the previous boiler should be
for the current boiler to be activated.
• For example, if the Modulation Start for Boiler B is set to 75%, then when Boiler A reaches
75% modulation plus Ignition%, Boiler B (if Boiler B is in Auto Mode and is not already
on) will be brought on at the Ignition % level.
------ STAGE A -------
MODULATION START
75%
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• When modulation is decreasing, the lag unit will remain on at the Ignition % modulation until the previous boiler reaches 40% of
lag boiler's Modulation Start, or 2% above the Ignition Point, whichever is higher.
• Using the same example, as the load decreases, Boiler B would modulate down to its Ignition %. Boiler A would then modulate
down to 30%. Only then would Boiler B turn off.
• If the Lag Delay is set to anything other than 0, a boiler must always go up to 100% modulation before the next boiler is activated.
However, the Modulation Start % should still be set correctly, because it will be valid when modulation is decreasing.
• Heat-Timer suggests that when Parallel is selected as the Modulation Mode (See "Modulating Mode" on page 18.) to set the
Modulation percent equal to or slightly higher than double the Ignition %. This way, the lag boiler will only start if the load is large
enough for two boilers to run at the lowest modulation.
copy settIngs - boIler a only
Button: STAGE/Copy Settings
• If all the active boilers will have the same Ignition Start Point and Modulation Point, they
can be set for Boiler A and then copied to the other boilers.
• It is still required to select the Mode for all other boilers as the Mode is NOT copied.
alert
The Mode MUST be set for each boiler. The Copy Settings command will not set the
Mode for the remaining boilers. Only Ignition % and Modulation Start % are copied.
-- COPY SETTINGS --
From Stage A
to all other stages
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