Danfoss 087H3803 User Manual

MENU>Settings>Boiler
Protection
1x047
Choosewhetherthecirculationpumpfortheboilercircuit(P1)shouldbe
stoppedtopreventcondensationintheboilerduringtheheating-upperiod.
SeeAppendix“ParameterIDoverview”
OFF:
Thecirculationpumpiscontrolledaccordingto
demand.
ThecirculationpumpisswitchedONwhen:
·
thedesiredflow(boiler)temperatureishigher
thanthesetvalueinIDno.11078‘PheatT’or
·
theoutdoortemperatureislowerthantheset
valueinIDno.11077‘PfrostT’ .
ON:
ThecirculationpumpisswitchedOFFuntilthedesired
min.flow(boiler)temperatureisreached.
Themin.flow(boiler)temperatureissetinIDno.
11177‘Temp.min. ’ .
Typically,theheating-upperiodofanoilfiredboilermustbeasshort
aspossible.Thiswillreducecondensationinthefurnace.
Toobtainthebestconditionsfortheboiler,thecirculationpump(P1)
canbeswitchedOFFduringtheheating-upperiod.
ThecirculationpumpwillbeswitchedONwhentheactualflow
(boiler)temperatureishigherthanthemin.desiredflow(boiler)
temperaturesetinIDno.11177‘Temp.min. ’+halftheboiler
temperaturedifferenceinIDno.11046‘Difference’ .
ThecirculationpumpwillbeswitchedOFFagainiftheactualflow
(boiler)temperatureislowerthanthemin.desiredflow(boiler)
temperaturesetinIDno.11177‘Temp.min.’ .
Example:
‘Temp.min. ’=45°Cand‘Difference’=8K
ThecirculationpumpwillbeswitchedONwhentheactualflow
(boiler)temperatureishigherthan45+0.5x8=49°C.
ThecirculationpumpwillbeswitchedOFFwhentheflow(boiler)
temperaturegetslowerthan45°C.
Flow(boiler)temp.
0.5x‘Difference’
Boilertemperature
Time
MENU>Settings>Boiler
Bandlimit(A375applications)
1x048
Thebandlimitdetermineswhenburnersarecut-inandcut-outifthereis
atemperaturedifferencebetweenthedesiredandtheactualflow(boiler)
temperature.
Ifthedifferenceismorethanthesetvalue,thesettinginID11074‘Reaction,
o.band’determinesthecontrolofburnersteps.Ifthedifferenceislessthan
thesetvalue,thesettinginIDno.11075‘Reactioninband’determinesthe
controlofburnersteps.
SeeAppendix“ParameterIDoverview”
5...80K:
Setthebandlimit.
Temp.
Bandlimit
Desiredboiler/flow
temp.
Bandlimit
Time
128|©Danfoss|2017.09
VI.GU.L2.02
OperatingGuideECLComfort210/296/310,applicationA275/A375

Danfoss 087H3803 Specifications

General

Brand	Danfoss
Model	087H3803
Category	Controller
Language	English