KORAFLEX Variant F2V

for heating or cooling

The KORAFLEX Variant F2V is designed for heating or cooling rooms. It is capable of high heating and cooling performance. It is designed for counter-flow systems and is equipped with a stainless steel condensation drainage canal. Variant F2V trench heaters can be controlled using a BMS (Building Management System), and are to be installed solely in dry environments.

Technical data Demand

Heating
Deep cooling
Forced convection
Higher performance

KORAFLEX Variant F2V – 11/20	AISI 304 stainless steel casing, non-lacquered, non-lacquered Al/Cu heat exchanger
Depth [mm]	110 mm
Width [mm]	200 mm
Length [mm]	800 up to 3000 mm (by 200 mm)

KORAFLEX Variant F2V – 13/34	galvanized steel outer casing, RAL 9005 black lacquered, Lower AISI 304 stainless steel condensation drainage canal, non-lacquered
ECONOMIC version	non-lacquered Al/Cu heat exchanger
EXCLUSIVE version	RAL 9005 lacquered Al/Cu heat exchanger
Depth [mm]	130 mm
Width [mm]	340 mm
Length [mm]	1 200, 1 500, 2 000, 2 500, 3 000 mm

Heat Output [W]	from 67 to 14 609 W
Cooling output [W]	from 99 to 2 180 W
Max. operating pressure [MPa]	1.2 MPa
Max. operating temperature [°C]	90 °C
Connecting thread	inner G 1/2"
IP rating	IP 20
Cover grilles
	Cross grille - design solutions - Cross grilles must be ordered with trench heaters, as the casing must undergo alteration. These trench heaters will be fitted with a Cross frame suitable for a Cross grille. Where a linear grille is required, 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 U-frame.

Depth

Width

KORAFLEX Variant F2V / Depth 110 / Width 200

Heat output
Cooling output

Heat output

Inlet temperature in °C

Outlet temperature in °C

Air temperature in °C

ΔT

Depth 110 / Width 200
Length	Speed level	Heat output	Electrical input / 24 V DC	Acoustic pressure [dB(A)]	Acoustic performance [dB(A)]
800	0		0	-	-
800	1		1	19,1	27,1
800	2		2	26,6	34,6
800	3		2	28,9	36,9
1000	0		0	-	-
1000	1		1	19,8	27,8
1000	2		2	27,6	35,6
1000	3		2	30,0	38,0
1200	0		0	-	-
1200	1		1	20,1	28,1
1200	2		3	28,3	36,3
1200	3		3	31,0	39,0
1400	0		0	-	-
1400	1		1	20,8	28,8
1400	2		3	29,0	37,0
1400	3		3	31,7	39,7
1600	0		0	-	-
1600	1		2	21,2	29,2
1600	2		3	29,5	37,5
1600	3		5	32,4	40,4
1800	0		0	-	-
1800	1		2	22,0	30,0
1800	2		4	30,1	38,1
1800	3		5	32,9	40,9
2000	0		0	-	-
2000	1		3	21,9	29,9
2000	2		5	30,5	38,5
2000	3		6	33,5	41,5
2200	0		0	-	-
2200	1		3	22,2	30,2
2200	2		5	30,9	38,9
2200	3		6	34,0	42,0
2400	0		0	-	-
2400	1		3	22,4	30,4
2400	2		6	31,3	39,3
2400	3		7	34,5	42,5
2600	0		0	-	-
2600	1		3	22,7	30,7
2600	2		7	31,6	39,6
2600	3		9	34,9	42,9
2800	0		0	-	-
2800	1		3	22,7	30,7
2800	2		7	31,9	39,9
2800	3		9	35,3	43,3
3000	0		0	-	-
3000	1		4	23,1	31,1
3000	2		8	32,2	40,2
3000	3		10	35,6	43,6

Depth 130 / Width 340
Length	Speed level	Heat output	Electrical input / 24 V DC	Acoustic pressure [dB(A)]	Acoustic performance [dB(A)]
1200	0		0	-	-
1200	1		2	25,0	33,0
1200	2		4	33,4	41,4
1200	3		9	43,4	51,4
1500	0		0	-	-
1500	1		3	26,0	34,0
1500	2		5	34,8	42,8
1500	3		11	44,9	52,9
2000	0		0	-	-
2000	1		5	26,8	34,8
2000	2		8	36,0	44,0
2000	3		17	46,1	54,1
2500	0		0	-	-
2500	1		5	27,7	35,7
2500	2		10	37,4	45,4
2500	3		23	47,4	55,4
3000	0		0	-	-
3000	1		6	28,2	36,2
3000	2		12	38,1	46,1
3000	3		29	48,2	56,2

Cooling output

Inlet temperature in °C

Outlet temperature in °C

Air temperature in °C

ΔT

Depth 110 / Width 200
Length	Speed level	Cooling output	Electrical input / 24 V DC	Acoustic pressure [dB(A)]	Acoustic performance [dB(A)]
800	0	-	0	-	-
800	1		1	19,1	27,1
800	2		2	26,6	34,6
800	3		2	28,9	36,9
1000	0	-	0	-	-
1000	1		1	19,8	27,8
1000	2		2	27,6	35,6
1000	3		2	30,0	38,0
1200	0	-	0	-	-
1200	1		1	20,1	28,1
1200	2		3	28,3	36,3
1200	3		3	31,0	39,0
1400	0	-	0	-	-
1400	1		1	20,8	28,8
1400	2		3	29,0	37,0
1400	3		3	31,7	39,7
1600	0	-	0	-	-
1600	1		2	21,2	29,2
1600	2		3	29,5	37,5
1600	3		5	32,4	40,4
1800	0	-	0	-	-
1800	1		2	22,0	30,0
1800	2		4	30,1	38,1
1800	3		5	32,9	40,9
2000	0	-	0	-	-
2000	1		3	21,9	29,9
2000	2		5	30,5	38,5
2000	3		6	33,5	41,5
2200	0	-	0	-	-
2200	1		3	22,2	30,2
2200	2		5	30,9	38,9
2200	3		6	34,0	42,0
2400	0	-	0	-	-
2400	1		3	22,4	30,4
2400	2		6	31,3	39,3
2400	3		7	34,5	42,5
2600	0	-	0	-	-
2600	1		3	22,7	30,7
2600	2		7	31,6	39,6
2600	3		9	34,9	42,9
2800	0	-	0	-	-
2800	1		3	22,7	30,7
2800	2		7	31,9	39,9
2800	3		9	35,3	43,3
3000	0	-	0	-	-
3000	1		4	23,1	31,1
3000	2		8	32,2	40,2
3000	3		10	35,6	43,6

Depth 130 / Width 340
Length	Speed level	Cooling output	Electrical input / 24 V DC	Acoustic pressure [dB(A)]	Acoustic performance [dB(A)]
1200	0	-	0	-	-
1200	1		2	25,0	33,0
1200	2		4	33,4	41,4
1200	3		9	43,4	51,4
1500	0	-	0	-	-
1500	1		3	26,0	34,0
1500	2		5	34,8	42,8
1500	3		11	44,9	52,9
2000	0	-	0	-	-
2000	1		5	26,8	34,8
2000	2		8	36,0	44,0
2000	3		17	46,1	54,1
2500	0	-	0	-	-
2500	1		5	27,7	35,7
2500	2		10	37,4	45,4
2500	3		23	47,4	55,4
3000	0	-	0	-	-
3000	1		6	28,2	36,2
3000	2		12	38,1	46,1
3000	3		29	48,2	56,2

Standard contents

F2V 11/20 – AISI 304 stainless steel casing, non-lacquered, non-lacquered Al/Cu heat exchanger
F2V 13/34 – galvanized steel outer casing, RAL 9005 black lacquered, Lower AISI 304 stainless steel condensation drainage canal, non-lacquered
– Exclusive version – RAL 9005 lacquered Al/Cu heat exchanger
– Economic version – non-lacquered Al/Cu heat exchanger
aluminium U-frame, silver elox
metal cover plate
set of low-energy EC 24V DC fans
24V DC terminal block and regulator (FCR BOX)
levelling set screws and 4 anchors
spacers for correct installation and concreting
hardboard cover to protect trench heater from contamination
durable packaging, installation instructions

Optional accessories

choice of grilles
cross grille – design solutions – necessary to order together with trench heater
light/dark bronze and black elox or RAL colour chart laquered aluminium U-frame
silver, light/dark bronze and black elox or RAL colour chart lacquered aluminium F-frame
24 V DC power supply
24 V DC thermostat for regulation
24V DC thermoelectric actuator
external room sensor
sound insulation sheet
raised floor structural supports
lockshield, thermostatic valve
½"×½" 90° brass elbow for connection facilitation
flexible stainless steel 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 - NEWS	Linear aluminium black elox - NEWS
Roll-up steel	Linear steel	Roll-up stainless steel	Linear stainless steel
Roll-up natural / lacquer beech	Roll-up natural / lacquer oak	Roll-up natural / lacquer mahogany (upon request)	Cross (upon reques)

FRAMES

U-frame	F-frame	Cross frame - Lowered casing edge

Decorative U-shaped and F-shaped frames are available as standard in aluminium with silver, black, dark bronze or light bronze elox finishes. U-frame and Cross frames are available also in black elox. Frames may also be lacquered (powder coated) using colours from the RAL colour chart. Frames are in every case supplied as a component of trench heaters, and the type required must be specified when ordering in the Order Code.

FV TRENCH HEATER INSTALLATION

Construction recommendations

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 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.
While pouring concrete, the trench heater may be weighed down.
Using anchors will extend the bottom width of the trench heater by 42 mm from each side.
While pouring concrete it is important to brace the trench heater to prevent longitudinal buckling. Trench heaters are fitted with spacers for this purpose. Following concreting, these spacers are easily removed. Note: FVP models as standard are, however, not equipped with spacers.
While pouring concrete or anhydrite it is essential to seal all connection openings to prevent leakage. We also recommend insulating trench heaters against dampness.
Where trench heaters are not concreted in, raised floor supports are recommended to use. Standard 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.
For trench heaters with forced convection we recommend undertaking fastening and acoustic insulation by pouring thin concrete along the sides and under the base of the heater.
To avoid contaminating the trench heater, we recommend maintaining the protective hardboard cover in place during construction work. The cover, 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 optional extras.
Fans are attached to the trench heater casing using magnets. For stainless steel models velcro is used. This system enables removal of the fans from the trench heater during installation to avoid damage, contamination, etc. Fans may also be removed this way for cleaning when the unit is switched off. With the exception of the Pool series, fans are installed to direct air towards the windows.
Electrical installation design must be carried out by suitably qualified persons in accordance with the relevant regulations.
Installation and servicing of the electrical installation must be carried out by persons with the relevant electro-technical qualifications.
Prior to commissioning, the electrical components must be thoroughly inspected in accordance with relevant regulations.

1- trench heater with forced convection, 2 - heat exchanger, 3 - fan, 4 - grille, 5 - F-frame,
6 - anchors, 7 - set screws, 8 - window, 9 - floor level, 10 - grout, 11 - expansion joint,
12 - insulation, 13 - concrete, 14 - sub-floor

Raised floor installations

Structural supports for raised floor trench heater installations offer stable and effective solutions. Structural supports are manufactured from non-lacquered steel and are suitable for raised floors of a depth of up to 500mm. Structural supports are suitable for Optimal-V, Energy, Variant F2V and F4V. For structural reasons, the KORAFLEX Pool-V model is not recommended for installation into raised floors.

SZP-03 low-raised floor support

Trench heaters are fitted with reinforcing bars and set screws, which enable the trench heater to be installed at the required height. Set screws must be anchored to the floor to prevent movement. Reinforcing bars are not included as standard and cannot be fitted subsequently. The screws allow setting a maximum height which is max. 30 mm higher than the trench heater itself. Recommended for raised floors with a maximum depth 30 mm greater than the unit height of the trench heater.

SZP-10 higher raised floor support

Customized solutions for all projects dealing with raised flooring. This is a more robust model of the low raised floor support, equipped with one support at the base of the trench heater. The precise technical design depends on customer's requirements. Recommended for raised floors with a maximum depth 100 mm greater than the unit height of the trench heater.

SZP-30 high-raised floor support

Customized solutions for projects dealing with high raised flooring. This is a more robust model of the higher raised floor support, equipped with two supports at the base of the trench heater. The precise technical design depends on customer's requirements. Recommended for raised floors with a maximum depth 300 mm greater than the unit height of the trench heater.

TRENCH HEATER MULTIPLE INSTALLATIONS

Casing types according to water connections and lowered faces for multiple installations
Lowered trench heater casing faces are used where invisible connections are desired between convectors (multiple convectors around a room, eg. in administrative buildings, restaurants, hotels, etc.). When ordering grilles, care must be taken to include information in the order code that the grilles required are to be used with trench heaters with lowered faces.

NUMBER OF FANS PER TRENCH HEATER

ORDERING CODES

Example of ordering code: F2V-120/13/34-V1U1P0R-RT

KORAFLEX trench heater with fan (forced convection), F2V 2-pipe model for heating or cooling, 24 V DC model, length 120 cm, depth 13 cm, width 34 cm, counter-flow non-lacquered heat exchanger U-frame silver elox, right-hand connection, without lowered face, for roll-up grille, 24V DC regulation

KORAFLEX	2pipe	Forced convection		Length/Depth/Width (cm)		Heat exchanger type	Heat exchanger colour	Frame	Frame colour	Connection side	Lowered face	For grille		Regulation
F	2	V	-	120/13/34	-	V	1	U	1	P	0	R	-	RT
						V counter-flow	1 non-lacquered 5 RAL 9005 9 other colour RAL	U -frame F -frame C for Cross grille 0 without frame	1 silver elox 2 dark bronze elox 3 light bronze elox 5 black elox 9 other RAL colour 0 without frame	P right L left	0 without lowered face 1 lower face – input side 2 lower face – opposite input side 3 both sides lower	R roll-up L* linear		24V DC regulation

L* – technical alterations to convector casing

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