Search the forum,

dhw

Rollei (German pronunciation: [ˈʁɔlaɪ]) was a German manufacturer of optical instruments founded in 1920 by Paul Franke and Reinhold Heidecke in Braunschweig, Lower Saxony, and maker of the Rolleiflex and Rolleicord series of cameras. Later products included specialty and nostalgic type films for the photo hobbyist market.
Originally named Werkstatt für Feinmechanik und Optik, Franke & Heidecke, the company renamed into Rollei-Werke Franke & Heidecke GmbH in 1972, Rollei-Werke Franke & Heidecke GmbH & Co. KG, in 1979, and Rollei Fototechnic GmbH & Co. KG in 1981.
After being purchased in 1995 by Samsung Techwin, part of the South Korean Samsung Group, it was sold back to its internal management in 1999. In 2002, it was bought by a Danish investment group, and renamed Rollei GmbH in 2004.
In 2005/2006, the company headquarters moved to Berlin and the company was split into two different companies: Rollei GmbH in Berlin, owner of the Rollei brand and selling various OEM equipment, and Rollei Produktion GmbH in Braunschweig, an equipment factory which became Franke & Heidecke GmbH, Feinmechanik und Optik.
Following another restructuring in 2007, Rollei was split into three companies. Franke & Heidecke GmbH, Feinmechanik und Optik focused on the production of professional medium format cameras and slide projectors, while RCP-Technik GmbH & Co. KG in Hamburg was responsible for Rollei consumer products like re-branded compact digital cameras in the European market, and with the RCP Technik Verwaltungs GmbH owning the rights to the "Rollei" and "Rolleiflex" brands. Finally, Rollei Metric GmbH took over the photogrammetry business.In early 2009, Franke & Heidecke GmbH, Feinmechanik und Optik declared itself insolvent. Since 2009 Rolleiflex medium format cameras, Rollei 35 and Rolleivision slide projectors were being produced by the DHW Fototechnik GmbH—a company founded by Rolf Daus, Hans Hartje and Frank Will, former Franke & Heidecke employees. DHW Fototechnik presented two new Rolleiflex cameras and a new electronic shutter at photokina 2012. DHW itself filed for insolvency on 2014-08-15 and was dissolved in April 2015, thereby temporarily ending any further production of cameras, lenses and accessories. A new, smaller company called DW Photo was formed with reduced staffing, and more or less the same people leading the business; the manufacturing and sale of projectors and twin-lens reflex cameras, as well as that of the series 6000, was stopped, to concentrate on the Hy6 and accessories. A new battery and charger for owners of the 6000 series were however released to the market in 2019, as the original NiCd batteries could age prematurely.
As of 2015 the brands "Rollei" and "Rolleiflex" continue to be owned by the RCP Technik Verwaltungs GmbH. On 2015-01-01, the RCP-Technik GmbH & Co. KG refirmed as Rollei GmbH & Co. KG to market digital consumer cameras and accessories under the "Rollei" label in Europe.

View More On Wikipedia.org
  1. P

    BAXI 105e, DHW Strange issue

    I have a very strange issue with my BAXI 105e DHW. if i turn on the hot tap the pump starts and demand for DHW is shown, after a some seconds it will show an error, 60 degree, pump or flow. Well switch the tap off wait maybe fifteen seconds turn tap on and low and behold hot water. If after a...
  2. M

    Viessmann 200-w B2HA-35. CH flow pipe hot when only demand for DHW

    Hi, Hopefully someone can throw some light on if this is a real issue or not. I have had this boiler for about 10 years, I noticed just recently that when the CH has been turned off that a couple of the rads closest to the boiler were slightly warm. When the boiler had demand to heat the DHW I...
  3. P

    Baxi 105e dhw strange

    Hope someone can offer some help with this issue, I have a Baxi 105e works fine no real downside, serviced looked after regularly. Have an issue with hot water, open hot water taps runs cold and indicates on boiler 60degrees or pump or pressure problem. Leave it ten seconds open taps again low...
  4. G

    Worcester 230 going to o/h lock out oin DHW

    Morning Guys, I have a Worcester 230 Combi in a rental property that is going to overheat lockout after a couple of minutes on DHW, no issue when on CH but if DHW is called for when heating is on same fault occurs. System is clean as always had inhibitor so unlikely to be a blocked heat...
  5. B

    correct pressure and dhw temp query

    Hi everyone just checking if this is right regarding water pressure and combi boiler pressure: Do hot and cold water always vary in pressure such as the following? Cold water from tap filled 1 litre jug in 2 seconds Hot water from tap filled 1 litre jug in 5 seconds Gas combi boiler pressure...
  6. Desktop987456

    Open vent DHW - calculate recovery time

    What would be the heating time for this (indirect) vented cylinder? Rated coil = 14kw Is it 96 litres x 4.2 specific weight x 40 (dT) ? How do I calculate the heating requirement of the boiler to heat this cylinder. Secondly, they are simpler to install as opposed to unvented type but what are...
  7. T

    Improvements for pre-lagged DHW cylinder

    I have a factory lagged indirect hot water cylinder in the airing cupboard, installed about 2002. The control thermostat is fitted near the bottom of the cylinder and the primary circuit connections are near the top and bottom of cylinder connected to a gas fired boiler. This results in nearly...
  8. B

    Central Heating cuts out when DHW reaches set temperature

    Hello, I hope someone can give some advice with this problem. I have a Vaillant ecoTec plus 418 with Drayton MA1 mid-position actuator, Drayton HTS3 cylinder stat, Honeywell DT90E room stat and Drayton LP522 controller. Boiler fires up reliably, but after it cuts out as soon as the DHW...
  9. P

    URGENT Baxi Duo-Tec Combi 33 HE DHW Fault

    Hello, Looking for someone who can please help solve this problem and fix our boiler. Staffs area. CH seems fine. Boiler can be coaxed into full burn with the fan spinning at full speed, so I think everythings fine on the gas/air/flue/condensate side of things. If there is DHW demand on the...
  10. Martdj

    ideal Isar He30 boiler works but the contol panel appears to be dead

    I have an ideal Isar He30 ( yes I know they are crap!) the boiler works but the contol panel asppears to be dead, the DHW and CH temperature controls have no effect and the boiler runs at max temp on both DHW and CH. I have repalced the display/contol panel and it still appearsto be dead. Would...
  11. D

    Tip - Ideal Vogue Max - Separating DHW and CH Temps

    Hi everyone, My Ideal Vouge Max 26 was installed a few years back, all works fine. Its an S plan setup, but I've always been amazed that the temperature for the water tank and the central heating were the same and 'couldn't' be separated (according to the Ideal registered plumber who installed...
  12. J

    DHW SETTINGS on Gas Boiler

    Why are there options for setting time periods for DHW? If set for 24hours, ie 24/7 won’t the boiler simply turn on .. on demand?…no need for time periods! What am I not seeing?
  13. G

    Gas Boiler DHW demand

    Why is there a choice in choosing time periods for DHW on gas boilers?….Why not having DHW ‘on’ 24hours/day. Isn’t the boiler switched on only on DHW demand ?…hence no need for setting time intervals for DHW.
  14. bob the fiddler

    S-Plan redesign for ufh, buffer tank, dhw, heat pump /with solar

    I have looked at the S-PLAN wiring diagram (standard) for my new UFH/DHW system, but I don't think it offers me the best use of the new heat pumps resources, given i want to run the heat pump at low temp for a long time during sunlight hours only. Instead I came up with different control plan...
  15. V

    Can I oversize a new combi for DHW flow rate?

    I have to replace my combi (Vaillant ecotec 35kw) and installer has suggested Ideal Vogue 32kw. Happy with his advice regarding the model but I see that the DHW is only 13 l/min whereas on the old Vaillant it was 15 l/min Therefore I was wondering about getting the 40kw Vogue as this is...
  16. A

    USA DHW Mixing Valve Output Fluctuates

    Our building has a boiler that provides both hydronic heat and domestic hot water. It's been working without any serious problems for 10+ years. The DHW is heated via a coil and goes through a Holby mixing valve, which a few months back had a problem with the mix exceeding the maximum safe...
  17. S

    ACV Heat Master HM 60 N heating separate from DHW?

    I just moved into a house with an ACV Heat Master HM 60 N boiler in the garage, providing hot water for two heating systems (plus of course domestic hot water). One is an underfloor system for the ground floor controlled by a Honeywell CM67. The other is a radiator system for upstairs controlled...
  18. N

    Baxi combo boiler leak from DHW when not used for 5-6 hours

    Hi I have a BAXI NETA-TEC COMBI 33 GA boiler and every morning I come down to a small puddle of water underneath the boiler. The gas engineer has replaced two washers in the DHW and a new baxi brass adapter and tightens all connections, still the leak remains. It does not leak when the hot...
  19. taffyinhighlands

    Control logic with 2 rad circuits, ufh, dhw and towel rails circuits

    I have an oil heated circuit that now appears to be misbehaving and the main circulation pump running across the bypass wgen all the logic controllers are off. I think this is a new phenomena but cant be 100% sure. The ufh isnt on a logic controller, and its own booster pump is triggered by the...
  20. taffyinhighlands

    parallel hot water tanks - can switch to single as well as dual use?

    I've got a DHW system with 2 storage tanks run in parallel - everything is well set up for the 2 tank operation, but other than completely removing one tank, and draining it to avoid legionella risk, is there a way I can keep both hooked up but only run the single tank (system was installed for...
Creating content since 2001. Untold Media.

OFFICIAL SPONSORS

OFFICIAL SPONSORS

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock