Distribution manifold for underfloor heating TO 302A - TO 316A | FLOOR HEATING

Distribution manifold for underfloor heating
TO 302A - TO 316A

HERZ stainless steel manifolds can be used for underfloor, wall, and ceiling heating and cooling, as well as in combination with radiators. They allow for easy installation, use, and maintenance, and are compatible with other HERZ products.

Components:

units for automatic air venting and system filling/draining,
stainless steel housing,
6 l/min gray flow meter,
thermostatic inserts,
manifold brackets.

Certificate Drawing

Category:

FLOOR HEATING

Art.	Ident	Code	EAN	Circuits	PN	L	H	H1	L1	L2	L3	L4	G	G1	Cabinet
TO 302A	1863902	1 8639 02	3838963244158	2	6	194	313	200	50	22	39,9	75	1’’	3/4’’	1941201
TO 303A	1863903	1 8639 03	3838963244165	3	6	244	313	200	50	22	39,9	75	1’’	3/4’’	1941201
TO 304A	1863904	1 8639 04	3838963244172	4	6	294	313	200	50	22	39,9	75	1’’	3/4’’	1941201
TO 305A	1863905	1 8639 05	3838963244189	5	6	343	313	200	50	22	39,9	75	1’’	3/4’’	1941202
TO 306A	1863906	1 8639 06	3838963244196	6	6	393	313	200	50	22	39,9	75	1’’	3/4’’	1941203
TO 307A	1863907	1 8639 07	3838963244202	7	6	443	313	200	50	22	39,9	75	1’’	3/4’’	1941204
TO 308A	1863908	1 8639 08	3838963244219	8	6	493	313	200	50	22	39,9	75	1’’	3/4’’	1941204
TO 309A	1863909	1 8639 09	3838963244226	9	6	543	313	200	50	22	39,9	75	1’’	3/4’’	1941205
TO 310A	1863910	1 8639 10	3838963244233	10	6	593	313	200	50	22	39,9	75	1’’	3/4’’	1941205
TO 311A	1863911	1 8639 11	3838963244240	11	6	643	313	200	50	22	39,9	75	1’’	3/4’’	1941205
TO 312A	1863912	1 8639 12	3838963244257	12	6	693	313	200	50	22	39,9	75	1’’	3/4’’	1941206
TO 313A	1863913	1 8639 13	3838963244264	13	6	743	313	200	50	22	39,9	75	1’’	3/4’’	1941206
TO 314A	1863914	1 8639 14	3838963244271	14	6	793	313	200	50	22	39,9	75	1’’	3/4’’	1941206
TO 315A	1863915	1 8639 15	3838963244288	15	6	843	313	200	50	22	39,9	75	1’’	3/4’’	1941207
TO 316A	1863916	1 8639 16	3838963244295	16	6	893	313	200	50	22	39,9	75	1’’	3/4’’	1941207

HERZ stainless steel manifolds are designed for use in underfloor, wall, and ceiling heating and cooling systems. They are used in combination with HERZ shut-off or ball valves for optimal system performance. The compact design allows easy installation in distribution cabinets or directly on the wall. Integrated air vent and drain valves enable quick venting and system drainage.

The manifolds are compatible with other HERZ components, allowing flexible system planning. Various models are available with different numbers of heating circuits. High-quality materials ensure long service life and resistance to corrosion.

Declaration of conformity - SLO, ENG, DEU

Technical Data:

Nominal pressure: max. 6 bar
Max. operating temperature: 70°C
Min. operating temperature: 2°C
Mixing ratio of propylene glycol: 25–50%

Medium:
Heating water according to ÖNORM H5195 or VDI-Standard 2035. The use of ethylene or propylene glycol in a 25-50% mixing ratio is allowed. Lubricants based on mineral oils may affect EPDM seals and cause their failure. When using ethylene glycol products for frost and corrosion protection, please refer to the manufacturer’s documentation before use.

Features:

Automatic air venting
System filling and draining via ball valve
Flow reading through each heating branch using a flow meter (3 l/min or 6 l/min, depending on the model)
G3/4" euro cone connection for pipe attachment

Flow Meters:
Factory setting is fully open. The set flow rate can be read directly through the inspection glass. To adjust the flow rate, use the plastic adjustment key on top of the serrated part and turn it clockwise or counterclockwise.

Drain and Fill Ball Valves:
The ball valve at the end of each manifold bar is used for system filling and draining. A brass garden hose connection is attached for hose connection. A sealing cap (G3/4" according to ISO228-1) is included for additional sealing of the ball valve.

Thermostatic Valves M28x1.5:
Opened by spring force, they can be closed using a protective cap, manual actuator, or thermal actuator. Protective caps are factory-installed for mechanical protection during installation and must be replaced with appropriate electric or manual actuators after system startup. Thermostatic tops can be equipped with manual actuator 1 9102 80 or thermal actuators (available in 24V or 230V, NC or NO variants), which must be ordered separately. They can be controlled by a room thermostat or wireless control system, described in separate technical sheets.

Note: Thermostatic valves and flow meters are not shut-off valves. Unused heating loops must be closed with a cap at the outlet.

Automatic Air Vent:
An automatic air vent is integrated into the supply and return manifold end unit, allowing for automatic system deaeration.

Mounting Brackets:
HERZ manifolds can be mounted directly onto a wall or inside a cabinet using the supplied brackets. Mounting position is flexible.

Compatibility:
The manifolds are compatible with all HERZ components, including HERZ PIPEFIX adapters, shut-off, and ball valves. Use of HERZ shut-off valves is recommended for optimal system performance.

HERZ floor heating manifolds allow quick and easy installation in a distribution cabinet or directly on the wall. The integrated brackets ensure stable attachment and flexible mounting positioning.

All connection threads must be sealed with appropriate seals to prevent leaks. When connecting pipes, the use of HERZ PIPEFIX adapters is recommended for easy installation. After installation, it is necessary to check the proper operation of all valves and air vents. Maintenance includes regular inspection of valve functionality and removal of any impurities.

Example of installation with set TO101T: