Imi Heimeier Multibox 4 RTL Bedienungsanleitung Seite 6

IMI HEIMEIER / Floor Heating Control / Multibox 4
Information
Planning
- For all Multibox models, ensure that the system supply
temperature is suitable for setting up the floor heating
system.
- All Multibox models are to be connected to the return
pipe at the end of the floor heating circuit. Heed
direction of flow (see Examples of use).
- Depending on piping pressure loss, all Multibox models are
suitable for heating areas up to approx. 20 m
- The length of 12 mm internal diameter pipe in any heating
circuit should not exeed 100 m.
- With heating areas >20 m and/or pipe lengths >100 m, a
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T-piece, for instance, should be used to connect two equally
long heating circuits to the Multibox. (see Examples of use).
- To ensure low-noise system operation, differential pressure
over the valve should not exceed 0.2 bar.
- The floor heating pipe is to be laid spirally in the flooring screed
(see Examples of use).
- The set value of the RTL should not be below ambient
temperature - otherwise it will not open.
Thermal fluid
To stop any damage and scale in hot water heating systems, the
composition of the thermal fluid is to conform to VDI Directive
2035. For industrial and longdistance energy systems, see
applicable codes VdTÜV and 1466/AGFW FW 510.
Mineral oil in the thermal fluid and/or all kinds of lubricants
containing mineral oil lead to considerable swelling and, in most
cases, to the failure of EPDM seals.
When using nitrite-free antifreeze and anti-corrosive based
on ethylene glycol, technical advice – especially on additive
concentration – is to be taken from the anti-freeze/anti-corrosive
manufacturer's documentation.
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Functional heating
Carry out functional heating of heating screed conforming to
standards in keeping with EN 1264-4.
Earliest start for functional heating:
– Cement screed: 21 days after laying
– Anhydrite screed 7 days after laying
Begin 20 °C - 25 °C flow temperature and maintain for 3 days.
.
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Then set maximum design temperature and maintain for 4
days. Flow temperature can be regulated by controlling the heat
generator. Turn the protective cap anticlockwise to open valve or
turn RTL head to Position 5.
Refer to the screed manufacturer's information!
Do not exceed maximum floor temperature at the heating
pipes:
– Cement and anhydrite screed: 55 °C
– Poured asphalt screed: 45 °C
– according to screed manufacturer's technical advice!