http://www.nibe.eu/nibedocuments/13955/231611-3.pdf
page #78 heating medium : Max external avail. press at nom flow 67 kPa

for 0.13 L/s, which means 468 L/h, and this would be a spread of 6070/1.16/468 = 11.18°C

http://www.nibeonline.com/pdf/Datenblatt_CH_F1245-6.pdf
Nominelle Durchflussmenge 0.13 l/s, 0.47 m3/h
max. verfügb. ext. Druck 46 kPa

=================================================

http://www.nibeonline.com/pdf/Datenblatt_CH_F1245-6.pdf
In lower right diagram that we have an external pressure of about 20kPa = 200mbar at 0.3 L/s and 80% power.


http://www.nibe.eu/nibedocuments/13955/231611-3.pdf
In this document, at page #32 , for 0.3l/s we have 30kPa = 300mbar .

So, it's a little strange which document it's the right one .

==========================================================

The question it's, which it's the correct values of pressure loss in heating medium side of Nibe 1245 6kw ?
Above, you can see 2 different values of pressure loss in heating medium side, for the same heat pump ( Nibe 1245 6kw )

What's wrong ? What's the correct document ?
The above 2 documents have totally different diagrams . Just look it the pressure loss for 0.3l/s in heating medium side .

I can disable from Nibe 1245 6kw menu, the heater rod ? I can taking OFF the heater rod ?

thank you

luk

I wish to use it with underfloor heating, and not with radiators .
http://www.lksystems.se/en/LK-Systems-Sverige/Floor-Heating/FAQ-Under-Floor-Heating
It's not a good ideea to can setup the temperature in every room separately ?
But if i'll have wall heating pipes, i can't use the Nibe 1245 6kw for passive cooling ?
What means must to correct setup the heat curve ?
I need to setup the spread ( temp difference between brine out and brine in ), to have the highest brine temperature and COP ?
I wish to use the Nibe 1245 6kw with trench collector ( slinky loops ) .

230V 50Hz it's standard, but it's available three phase 400V , ground and neutral also.
I didn't buy it yet, but i wish to buy Nibe 1245 6kw or 8kw  from  Sweden , because in my country the price of heat pump it's allmost double than in Sweden .
And even if i travelling to Malmo, and i'll calculate the travel costs, will be more cheaper than to buy it from my country .
Just i need to find some on-line store, from where i can personally pick-up .

Maybe i need to buy Nibe 1245 in my own risk, so if i'll buy it, i'll have warranty just in Sweden, and if i'll have ( i hope not ), any deffect to heat pump, i'll can't going back to Sweden to repair it .

Can i ask you guys, what's the most often problems/defect with Nibe 1245 ?
It's worth to buy this modell, it's not worth ?
Can i risk it ?
I can hope, than in 3 years i'll don't have any problem with heat pump ?
The heat pump it have more modules, and i can change it me to ( if i get a change module ) ?
What will happens, if the power will have a high peak voltage ?
I think the heat pump it have some protection for this problem .
What you can tell me about reliability of Nibe 1245 ?
The scroll compressor it's good ? I'll don't have problems with compressor ?

Please, don't judge me if i asking newbie question, but i didn't have any heat pump in my life .
Until last summer i didn't hear about heat pumps, and specially about Nibe .

The only one person from my town who have a heat pump, it's a guy who have a Nibe 1226 11kw model, and he buy it personally from Sweden also .

What you can say about Nibe 1245 6kw and Vaillant Geotherm Exclusiv vws 63/3.

This modell from Vaillant it have cooling function also, not just heating .

But what about comparation with Viessmann 333G ?

How can i use it Nibe 1245 for cooling also ? Wall cooling  . Ceiling floor cooling etc ?
I need some extra module for cooling ? How much it will cost that cooling module ?

Can i use somehow Nibe 1245 in combination with ventilation system : Hoval Homevent RS 250 ?

thank you

luk

Standard är 230V, 50 hz, Ungern har det med

Hi!
If you buy the premium version (249 kr/year) you can use uplink to change settings on the heat pump.
The base version is free of charge but there you can only watch the values.

http://www.nibe.co.uk/Home-Owner/NIBE-Heat-Pumps/heat-pump-accessories/ESV-201/

I've think it , if the heat pump it have internet interface, then i'll can connect it to my wi-fi router, in a LAN port, with CAT5e cable, and i can remote control the Nibe 1245, without to need Nibe services .

For example : i'll connect Nibe 1245 to the router, and i'll connect through a browser ( IE,Firefox,Opera etc ) to heat pump menu, and i'll can change the settings, the same way i can connect to my router, everywhere from the Internet, if i know my IP ( internet protocol adress ), and the user/password .

http://www.nibe.se/Aktuellt/Nyhetslista/Uppkopplad-varmepump-for-tryggare-varme/

NIBE Uplink finns i en bastjänst och två premiumtjänster. Bastjänsten är helt kostnadsfri, premiumtjänsterna ”Ändra inställningar” och ”Historik” kostar från 249 kronor styck/år.

And for Nibe 1245 the Nibeuplink Premium will cost 249 kr/year, or the price will begin from 249 kr/year, and will can cost even more, for example 500 ode 1000kr/year ?

But without to register the heat pump to Nibeuplink, i can't connect over Internet to my heat pump ?
Just if i'll register it to Nibeuplink services ?

thank you

luk

Can i control Nibe 1245 over internet ? I mean, to setup the spread, the circulation pump flow values etc .
So, i'm not talking about logging the results, and just to check it over Internet .

For example : i don't know how to setup something in Nibe 1245 . Then, can i ask someone, who know it, to logging to Nibe 1245 settings menu, through Internet, and to setup it ?
I think , many of you have heard about PC Remote control software : Teamviewer .
With that software you can work in a remote pc, in the same way than in your PC ( if you have a good internet connection )

Can i use Nibe 1245 in the same way ? To setup and control remotelly from Internet ?

https://www.nibeuplink.com

Can I control the entire heating system with NIBE Uplink?

All menus except service menus, my icons and time and date are accessible through NIBE Uplink. In addition, you cannot perform actions that require physical access to your system, e.g. reset or switch to emergency mode.

What is a connection string?

A connection string is a code that is used to ensure that only those authorized can control your system. By using the connection string for authentication you can be sure that only those who had physical access to your heat pump/indoor module can connect their user account to it and control it. The connection string is generated when you request a new connection string and it is then valid for one hour or until it has been used once. Neither NIBE nor any outsider can see the connection string, only those who have had physical access to the heat pump/indoor module.

I need to pay for Nibeuplink ?

Without to pay, i can't connect to my heat pump through internet ?

How much i need to pay it ?



thank you

luk

The nominal flow ( Brine circuit) of the Nibe 1245 6kw = 1080 l/h (0.30l/s)
What's the spread of the Nibe for the 1080 l/h?

NIBE F1245 Installer manual
http://www.nibe.eu/nibedocuments/13955/231611-3.pdf
Please look it in : page 78 from this .pdf document.
I've looking for it, but i didn't find it this info .

Vaillant GEOTherm Exclusiv VWS 63/3 nominal flow =  1600l/h at a spread of 3K .
http://www.vaillant.at/stepone2/data/downloads/56/4e/00/09_wp_geotherm_excl_vws_63-103_1301.pdf

thank you

luk



 

If i choose Nibe 1255 or Nibe 1245 , in any of case, i need to use Puffer tank or not ?
How often use peoples Puffer for heat pumps ?

When the heat pump have many starting ( many on/off starting ), must to use a Puffer ?

But in case i use Nibe 1255 inverter, that will not have on/off starting, i still need Puffer or not ?

Nibe 1250
http://www.vvsonnet.se/sv/varmepumpar/nibe-fighter-1250-bergvarmepump.php

Nibe 1250 wasn't popular because of his verry high price .
In this way i can understand it, not so much people have choose it to buy .

For example : 6kw heat load , 170qm house , -15C lowest externel temperature winter , and it's in east side of Hungary .
I saw it, 1250 wasn't so popular, because the 1250 thread have only 4 pages, and 1245 thread have ( now ) 62 pages , so it's clear 1250 wasn't so popular than 1245 .

But what about electricity consumption for 1255 inverter ? It's lower than 1245 ? Normally most be lower, because that's the purpose of inverter to have a better/lower electricity consumption .

About the collector, with straight tubes what form it have ? What's the maximal tube length ? 100m ?
4 x 100m circuit ? Or 2 x 250m circuit ?

I hope i don't disturb nobody in this forum, if i'm writing in english .If i disturb somebody, please let me know .
I know i can get information in english from Nibe, but that's "official" information .
And i'm most interested about reality .About other people experience, in real life .

I know Nibe it's a Swedish brand, and in sweden you have history with heat pumps .
I wish to find from you as many information i can from Nibe heat pumps , and how did you use it, what kind of geothermal collector and so on .

 

1250 was not so popular, probably because of the price, 1255 is cheaper.
I don't know som much about problems on the 1250.

I think the life age of an inverter is same as an on/off heat pump, sometimes better depending on how good the heat pump is adjusted. And it is probably easier to adjust an inverter.

I don't know which circulation pumps or compressor there are in 1255, but probably the circulation pumps are the same as in 1245.

To calculate the lengs of the collector we need a little bit more information, a estimation of the building's energy demand and where it is?

The usual dimension of the geothermal hose/tube is 40'', and no longer than 500 m. If you want a longer hose you combine for example 2 x 300 m.

http://www.bynor.se/category.php?id_category=3266
(They don't have any information in english but they have relative low prices)

The advantage with a inverter (compressor with variable speed) is that is easier to fit when you don't know the exakt heat demand on the building.
And if the heat system have low volyme of water (for example floor heating) you probably won't need any extra volyme tank to the heat system.

If you have a small building there is a price gap between the smaller models of 1245 and 1255 that makes it cheaper to buy a 1245, and the 1255 have a lowest output of 4 kW that makes the benefit of it lower for the small house.

I think you can use a slinky loop to this heat pump. In Sweden the slinky is not so common, we very often use a straight geothermal hose instead. But make sure you don't have too small collector, it's better to dimension the collector to big that the opposite.