IVAR.CS 553 VPD underfloor heating manifold set, 5 circuits, 1" x EK, dynamic valves, surface-mounted cabinet N-KLASIK 2
Code: 553973DNRelated products
Product detailed description
5-circuit set with N-KLASIK 2 cabinet
The 553973DN set from the IVAR.CS 553 VPD range distributes heating water to 5 separate loops of a wet underfloor heating system; it also suits radiator installations with a dedicated supply to each radiator. Flow and return manifolds each have 5 outlets 3/4" EK at 50 mm spacing, the manifold body is 262 mm long (dimension A) and the set connects to the system with a 1" female thread (DN 25). The surface-mounted cabinet IVAR.N-KLASIK 2 with 130 mm depth is included; the version with a flush-mounted P-KLASIK 2 cabinet is code 553973D.
Dynamic instead of static balancing
Static balancing set at commissioning does not account for electrothermal actuators, driven by room thermostats, constantly opening and closing loops and changing the pressure in the manifold. The IVAR.VTC 30 D valves on the return have a built-in differential pressure regulator, so each loop gets its flow even at partial load – a benefit especially in systems with low thermal inertia. The maximum flow is chosen on a six-position selector; at a 10 K temperature difference, positions 1 to 6 correspond to 0.87–3.87 kW.
What the set includes
- flow manifold with regulating flow meters 0–2.5 l/min (5 pcs), with shut-off and setting lock
- return manifold with IVAR.VTC 30 D dynamic valves (5 pcs) and manual caps, ready for electrothermal actuators (M 30 x 1.5)
- intermediate pieces with thermometers, automatic air vents and fill/drain valves
- ball valves with unions for connection to the system
- mounting brackets
- surface-mounted cabinet IVAR.N-KLASIK 2
The bodies are made of drawn, heat-treated CW617N brass, seals are EPDM and threads comply with ISO 228/1; the set is rated for 10 bar and 90 °C.
Installation and accessories
Compression fittings are not included – one is needed per outlet, so 10 pcs in total: IVAR.TA 4420 for ALPEX, IVAR.TP 4410 for PEX or IVAR.TR 4430 for copper. To control the loops with room thermostats, add IVAR.TE 30xx or 40xx electrothermal actuators (5 pcs). Leave the flow meters on the flow manifold fully open, as the dynamic valves determine the flow. Flush the system thoroughly before commissioning; installation and setting should be done by a heating engineer.
Technical data
| Code | 553973DN |
| Brand | IVAR |
| Type | IVAR.CS 553 VPD |
| Number of outlets | 5 (supply and return) |
| Installation cabinet | surface-mounted IVAR.N-KLASIK 2, depth 130 mm |
| Set connection | 1" female thread, DN 25 |
| Outlets | 3/4" Euroconus (EK), 50 mm spacing |
| Centre distance supply – return | 200 mm |
| Return manifold valves | IVAR.VTC 30 D dynamic balancing, 6 positions |
| Actuator connection | M 30 × 1.5 |
| Flow meter range | 0–2.5 l/min (±10 %) |
| Output per circuit | 0.44–5.76 kW (depending on position and ΔT 5–15 K) |
| Max. operating pressure | 10 bar |
| Max. operating temperature | 90 °C |
| Material | brass CW617N, EPDM seals, PPA/ABC flow meter |
Frequently asked questions
Is the installation cabinet included with set 553973DN?
Yes, the set is supplied with the surface-mounted IVAR.N-KLASIK 2 cabinet with 130 mm installation depth. The version with flush-mounted P-KLASIK 2 cabinet is code 553973D, the version without cabinet is code 553973DBS.
How many compression fittings do I need to order separately?
Every outlet on the flow and return manifold needs one fitting, so this 5-circuit set takes 10 pcs in total. The type depends on the pipe: IVAR.TA 4420 for ALPEX, IVAR.TP 4410 for PEX, IVAR.TR 4430 for copper.
Is the flow adjusted with the flow meters on the manifold?
No, the flow meters must stay fully open and only display the flow. The maximum loop flow is set by the six-position selector on the dynamic valve in the return manifold.
Can the loops be controlled by room thermostats?
Yes, the manual caps on the return valves are replaced by IVAR.TE 30xx or 40xx electrothermal actuators, 5 pcs for this set. Actuators and thermostats are not included.
Additional parameters
| Category: | IVAR CS 553 VP without pump |
|---|---|
| Warranty: | 24 |
| Availability: | In stock or at supplier |
| Code: | 553973DN |
| Brand: | IVAR |
| Type: | IVAR.CS 553 VPD |
| Number of outlets: | 5 (supply and return) |
| Installation cabinet: | surface-mounted IVAR.N-KLASIK 2, depth 130 mm |
| Set connection: | 1" female thread, DN 25 |
| Outlets: | 3/4" Euroconus (EK), 50 mm spacing |
| Centre distance supply – return: | 200 mm |
| Return manifold valves: | IVAR.VTC 30 D dynamic balancing, 6 positions |
| Actuator connection: | M 30 × 1.5 |
| Flow meter range: | 0–2.5 l/min (±10 %) |
| Output per circuit: | 0.44–5.76 kW (depending on position and ΔT 5–15 K) |
| Max. operating pressure: | 10 bar |
| Max. operating temperature: | 90 °C |
| Material: | brass CW617N, EPDM seals, PPA/ABC flow meter |
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IVAR designs, develops and manufactures highly energy-efficient heating and plumbing systems. We have over 10,000 catalogue items - mass-produced products and unique items - in addition to customised systems and combinations of complex products. And it’s all “Made in Italy”.
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To make life easier for our clients, our clients' customers and our employees, thanks to our ability to be constantly innovative.
Mission
To design and manufacture advanced hydronic solutions that reduce installation complexity and energy consumption.
“Made in Italy” adds value
IVAR has been producing heating and plumbing system components since 1985: valves for heating bodies, direct heat metering modules, heat cost allocators, pipes and fittings, substations for heating systems, distribution manifolds, radiant panel systems, and components for solar and geothermal systems. And it’s all “Made in Italy”.
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Research, development and numerous laboratory tests guarantee that our clients’ requests can be translated into new high-efficiency products.
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