Mitsubishi EHST20C-VM2C User Manual

49
<Operation settings>
Freeze stat function
Menu subtitle Function/ Description
Freezestatfunction*
1
Anoperationalfunctiontopreventthewatercircuitfromfreezingwhenoutdoorambienttemperaturedrops.
Flowt. ThetargetoutletwatertemperatureatwatercircuitwhenoperatinginFreezestatfunction.*2
Outdoor ambient temp. Minimumoutdoorambienttemperaturewhichfreezestatfunctionwillbegintooperate,
(3–20ºC)orchoose**.Ifasterisk(**)ischosenfreezestatfunctionisdeactivated.(i.e.primarywaterfreezerisk)"
*1.Whenthesystemisturnedoff,freezestatfunctionisnotenabled.
*2.Flowt.isxedto20°Candunchangeable.
Simultaneous Operation
Forperiodsofverylowoutsidetemperaturethismodecanbeused.Simultaneous
operationallowsbothDHWandspaceheatingtoruntogetherbyusingtheheatpump
and/orboosterheatertoprovidespaceheatingwhilstonlytheimmersionheater
providesheatingforDHW.ThisoperationisonlyavailableifBOTHaDHWtankAND
immersion heater are present on the system.
Heating operation
ThisfunctionallowsoperationalsettingofowtemperaturerangefromtheEcodanandalsothetimeintervalatwhichtheFTCcollectsandprocessesdatafortheauto
adaptation mode.
Menu subtitle Function Range Unit Default
Flowtemp.range Minimum temp. TominimizethelossbyfrequentONandOFFinmildoutdoorambienttem-
perature seasons.
25–45 ºC 30
Maximumtemp. Tosetmax.possibleowtemperatureaccordingtothetypeofheatemitters. 35–60 ºC 50
Room temp. control Mode SettingforRoomtemp.control
AtFastmode,targetoutletwatertemperatureissethigherthantheoneset
atnormalmode.Thisreducesthetimetoreachthetargetroomtemperature
whentheroomtemperatureisrelativelylow.*
Normal/
Fast
— Normal
Interval Selectableaccordingtotheheatemitter typeandthematerialsofoor(i.e.
radiators,oorheating-thick,-thinconcrete,wood,etc.)
10–60 min 10
Heatpumpthermodiff.adjust ON/OFF TominimizethelossbyfrequentONandOFFinmildoutdoorambienttem-
perature seasons.
ON/OFF — ON
Lowerlimit Prohibitsheatpump operation untiltheflowtemperaturedropsbelowthe
targetowtemperaturepluslowerlimitvalue.
−9–−1 ºC −5
Upper limit Allowsheatpumpoperationuntiltheowtemperaturerisesabovethetarget
owtemperatureplusupperlimitvalue.
+3–+5 ºC +5
<Heatingoperation(Roomtemp.controltable)>
Notes:
1.Theminimumowtemperaturethatprohibitsheatpumpoperationis20ºC.
2.ThemaximumowtemperaturethatallowsheatpumpoperationequalstothemaximumtemperaturesetintheFlowtemp.rangemenu.
*Fastmodeisnotefcientandwillincreaserunningcostcomparedtonormalmode.
•Rangeofoutdoorambienttemperatureatwhichsimultaneous
operationstartsis−30to10°C(default−15°C).
•Systemshallautomaticallyreturntoroutineoperation.Thiswill
happenwhentheoutdoorambienttemperaturerisesabovethe
selectedtemperatureforthisspecicmodeofoperation.
Cold weather function
Forextremelylowoutdoorambienttemperatureconditionswhentheheatpump’scapacityisrestrictedtheheatingorDHWisprovidedonlybytheelectricbooster
heater(andimmersionifpresent).Thisfunctionisintendedforuseduringextremecoldperiodsonly.ExtensiveuseofdirectelectricalheatersONLYwillresultin
higherpowerconsumptionandmayreduceworkinglifeofheatersandrelatedparts.
Floor dry up function
TheFloordryupfunctionautomaticallychangesthetargethotwatertemperature
instagestograduallydryconcretewhenthisparticulartypeofunderoorheating
system is installed.
Uponcompletionoftheoperationthesystemstopsalltheoperationsexceptthe
Freezestat.
ForFloordryupfunction,thetargetowtemp.ofZone1isthesameasthatof
Zone2.
Functions Symbol Description Option/Range Unit Default
Floor dry up function a
Setsthefunction toONandpoweronthesystemusing themainremote
controller,andthedryupheatingoperationwillstart.
ON/OFF — OFF
Flowtemp.
(increase)
Flowtemp.increasestep b Setstheincreasestepofthetargetowtemperature. +1–+10 ºC +5
Increase interval c Setstheperiodforwhichthesametargetowtemperatureismaintained. 1–7 day 2
Flowtemp.
(decrease)
Flowtemp.decreasestep d Setsthedecreasestepofthetargetowtemperature. −1–−10 ºC −5
Decrease interval e Setstheperiodforwhichthesametargetowtemperatureismaintained. 1–7 day 2
Target
temperature
Start&Finish f Setsthetargetowtemperatureatthestartandthenishoftheoperation. 25–60 ºC 30
Max.targettemp. g Setsthemaximumtargetowtemperature. 25–60 ºC 45
Max.temp.period h
Setstheperiodfor which the maximum target ow temperature is main-
tained.
1–20 day 5
45
40
35
30
0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18
(
°C
)
(b)
(d)
(h)
(c)
(f)
(e)
(g)
Days
Targetowtemp.
• ThisfunctionisnotavailablewhenaPUHZ-FRPoutdoorunitisconnected.
• Disconnectwiringtoexternalinputsofroomthermostat,demandcontrol,and
outdoorthermostat,orthetargetowtemperaturemaynotbemaintained.
•Rangeofoutdoorambienttemperatureatwhichcoldweatherfunctionstarts
is−30to−10°C(default−15°C).
•Systemshallautomaticallyreturntoroutineoperation.Thiswillhappenwhen
the outdoor ambient temperature rises above the selected temperature for
thisspecicmodeofoperation.
OCH570C

Mitsubishi EHST20C-VM2C Specifications

General

Brand	Mitsubishi
Model	EHST20C-VM2C
Category	Heat Pump
Language	English