KORAFLEX Pool FKP

pool design

KORAFLEX Pool FKP is manufactured from AISI 316 stainless steel and is ideal for humid environments. The Pool convector is finished with a hem, therefore no frames can be fitted.

Unsuitable for saltwater pools.

Technical data Demand

Heating
Natural convection
Pool solution

Depth [mm]

90, 110 mm

Width [mm]

200, 260, 320, 400 mm

Length [mm]

800 to 3 000 mm (by 100 mm)

Heat output [W]

from 120 to 1 739 W

Max. operating pressure [MPa]

1.2 MPa

Max. operating temperature [°C]

90 °C

Connecting thread

inner G ½"

Cover grilles

Where a left-hand connection to the heating system is required, rotate the heat exchanger in the trench heater by 180°.
Individual KORAFLEX Pool trench heater casings can not be combined into multiple series, and are manufactured
solely as P0 models, frame substituted with hem, with counter-flow heat exchangers.

Where a linear grille is selected, technical consultation is necessary, as the casing may need to undergo alteration.
Linear grilles must be ordered together with trench heaters.

Heat output [W] where t1/t2/ti / EN 16430. Measurements shown in mm including hem.

Inlet temperature in °C

Outlet temperature in °C

Air temperature in °C

ΔT

ΔT = 50 °C		Length [mm]																							Temperature exponent
Depth [mm]	Width [mm]	800	900	1000	1100	1200	1300	1400	1500	1600	1700	1800	1900	2000	2100	2200	2300	2400	2500	2600	2700	2800	2900	3000	Temperature exponent
90	140	50	62	74	86	98	110	122	134	146	158	170	182	194	206	218	230	242	254	266	278	290	302	314	1,5247
90	200	120	143	167	191	214	238	261	285	308	332	355	379	402	426	449	473	496	520	543	567	590	614	637	1,5373
90	260	153	183	213	243	273	303	333	363	393	423	453	483	513	543	573	603	633	663	693	723	753	783	813	1,5643
90	320	195	236	278	319	361	402	444	485	526	568	609	651	692	733	775	816	858	899	940	982	1023	1065	1106	1,4599
90	400	275	329	383	437	490	544	598	652	706	760	814	868	922	976	1029	1083	1137	1191	1245	1299	1353	1407	1461	1,4607
110	140	55	69	82	95	108	122	135	148	161	174	188	201	214	227	240	254	267	280	293	307	320	333	346	1,4888
110	200	142	170	198	226	254	282	309	337	365	393	421	449	477	505	532	560	588	616	644	672	700	728	755	1,4739
110	260	184	220	257	293	329	365	401	437	473	510	546	582	618	654	690	726	763	799	835	871	907	943	979	1,4385
110	320	237	287	338	388	438	489	539	589	640	690	740	791	841	891	942	992	1042	1093	1143	1193	1244	1294	1344	1,4622
110	400	327	391	455	520	584	648	712	776	840	905	969	1033	1097	1161	1225	1289	1354	1418	1482	1546	1610	1674	1739	1,4569

Standard contents

AISI 316 stainless steel casing, non-lacquered

Al/Cu RAL 9006 grey lacquered heat exchanger with bleed valve

frame substituted by casing edges finished with hem

AISI 316 stainless steel cover plate

levelling set screws and 4 anchors

hardboard cover to protect trench heater from contamination

durable packaging, installation instructions

Optional accessories

choice of grilles

thermostatic head with incorporated control and immersion remote sensor

24V DC power supply 60 W, 100 W

room thermostat SIEMENS RAA21 or SIEMENS RDE 100.1

24V DC or 230V AC thermoelectric actuator

lockshield, thermostatic valve, axial thermostatic valve

½" × ½" 90° brass elbow for connection facilitation

flexible connecting hose

strengthened OSB cover for installation purposes

Suitable grilles

Roll-up aluminium silver	Linear aluminium silver	Roll-up aluminium dark bronze	Linear aluminium dark bronze
Roll-up aluminium light bronze	Linear aluminium light bronze	Roll-up aluminium black elox	Linear aluminium black elox

HEM FINISHING

KORAFLEX Pool FKP trench heaters are suitable for installation in humid environments. Fitted with built-in drainage and a sloping base. However, these trench heaters are not watertight and must not be flooded for long periods. For ideal operating conditions, we recommend using water with a pH of 7.2 – 7.6, with a maximum chlorine content of 1mg/l. Changes in these values – in particular lower pH values – will result in more aggressive water and corrosion of non-stainless steel components. Pool trench heaters installed in humid environments must be cleaned regularly with clean water and dried thoroughly. In case of visible calcareous deposits or oxidation, use a stainless steel cleaner followed by a suitable metal treatment product. For long-term satisfaction, it is essential that basic maintenance of the stainless steel components is carried out. Further information can be found in the installation manual and Operating and warranty conditions, available to download at websites.

FK TRENCH HEATER INSTALLATION

To ensure correct operation, it is essential that the following principles are respected

Trench heaters must be installed horizontally with the heat exchanger on the window side. For the grille to function correctly, the upper edge of the casing must be straight and level (not buckled or bent).
The maximum recommended distance of the trench heater from the wall/window is 100 mm.
The size of the trough in the floor for the trench heater installation should be at least 100 mm bigger (both in length and width) than the convector.
We recommend connecting the trench heater to the heating system using a lockshield and thermostatic valve. The heat exchanger connection is by an inner G½ thread. Following connection to the heating system, bleed and carry out a pressure test.
When concreting, the trench heater must be levelled using the set screws provided and fastened to the floor using the anchors provided. The anchors keep the trench heater in place while pouring concrete.
Using anchors will extend the bottom width of the trench heater by 42 mm from each side.
While pouring concrete, the trench heater may be weighed down.
While pouring concrete it is particularly important to brace the trench heater to prevent longitudinal buckling. Trench heaters are fitted with spacers for this purpose. (Please note: FKP models as standard are, however, not equipped with spacers.) Following concreting, these spacers are easily removed.
While pouring concrete or anhydrite it is essential to seal all connection openings to prevent leakage.
Where the trench heater is not concreted in, floor supports are recommended to be used to incorporate the trench heater into a raised floor. Standard trench heater models are not self-supporting.
We recommend insulating the outer side of the trench heater casing along the length of the heat exchanger with polystyrene to prevent heat loss into the floor.
To avoid contaminating the trench heater, we recommend maintaining the protective hardboard cover in place during construction work. The board, which is included in the standard contents, is not suitable for walking on and serves solely to protect the trench heater from contamination during installation. Strengthened OSB covers for installation purposes are available as option extras.
Trench heaters fitted with stainless steel casings installed in humid environments – marked KORALEX Pool FKP – are equipped as standard with overflow drains. During installation, the pipe at the bottom of the trench heater must be connected to piping with sufficient gradient to drain overflow water. We recommend installing a U-bend to prevent odour.

TRENCH HEATER MULTIPLE INSTALLATIONS

• Individual KORAFLEX Pool FKP trench heater casings cannot be combined in this way and are available in P0 models only.

Recommended positioning of heat exchangers in trench heaters

•Trench heaters should be positioned a maximum of 100mm from windows. In order to achieve maximum performance, the recommended position for heat exchangers in the trench heater is always on the window side. This results in natural air flow, whereby warm air rises and cool air is drawn into the trench heater. This way, cool air at the window is screened and ambient air is heated.

• Trench heaters are fitted as standard with right-hand connections to the heating system; a left-hand connection is achieved simply by rotating the heat exchanger 180°.

TRENCH HEATER INSTALLATION

_{Alterations to technical specifications reserved.}

1 - trench heater with natural convection, 2 - heat exchanger, 3 - grille, 4 - U-frame, 5 - F-frame, 6 - set screws, 7 - anchors, 8 - up to 300mm deep dividing partition, 9 - window,  10 - floor level,  11 - grout,
12 - expansion joint, 13 - insulation, 14 - concrete filler, 15 - sub-floor

ORDERING CODES

Example of ordering code: FKP-100/11/26-V6P0P0

KORAFLEX trench heater with natural convection, Pool model, length 100cm, depth 11cm, width 26cm, counter-flow RAL 9006 grey lacquered heat exchanger, finished with hem, right-hand connection to heating system, without lowered face.

KORAFLEX	Convection	Pool		Length/Depth/Width (cm)		Heat exchanger type	Heat exchanger colour	Frame	Frame colour	Connection side	Lowered face
F	K	P	-	100/11/26	-	V	6	P	0	P	0
						V counter-flow 0 without heat exchanger	6 RAL 900 lacquer 0 without heat exchanger	P hem	0 without frame	right	0 without lowered face

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