LTG VFC Series User manual

Installation/Use/Maintenance Instructions
LTG Air-Water Systems
AIR TECH
SYSTEMS
Fan Coil Units VFC
Installation in sills

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 2 of 19
LTG Comfort Air Technology
Air Diffusers
Air Distribution
Air-Water-Systems
Notes
Dimensions stated in this brochure are in inches.
Dimensions stated in this brochure are subject to General
Tolerances according to DIN ISO 2768-vL.
For the outlet grille special tolerances stated in the draw
ing apply.
Straightness and twist tolerances for extruded aluminum
profiles according to DIN EN 12020-2.
The surface finish is designed to meet the requirements
for applications in buildings - room climate according to
DIN 1946 part 2. Other requirements on request.
Content Page
1. Safety instructions 3
1.1 Explanation of symbols and hints 3
1.2 Operating safety instructions 3
2. Transport, storage, delivery 4
2.1 Transport instructions 4
2.2 Storage 4
2.3 Delivery 4
3. Function 5
3.1 Intended use 5
4. Technical specifications 6
4.1 Specifications, dimensions, technical data
VFC-0
6
4.2 Specifications, dimensions, technical data
VFC-N
15
4.3 Specifications, dimensions, technical data
VFC-F
18
4.4 Capacity charts VFC-0 20
4.5 Capacity charts VFC-N 23
4.6 Caloric output data 26
4.7 Acoustic data 26
4.8 Hydraulic data 26
4.9 Electrical data 27
5. Installation 29
5.1 Installation, suspension 29
5.2 Water connections 33
5.3 Condensate connection 40
5.4 Check after installation 41
6. First Use 41
7. Operation, maintenance, repair 42
7.1 Heat exchanger, water connections,
condensate tray
42
7.2 Filter 42
7.3 Fan 42
7.4 Repair 42
7.5 Trouble shooting, corrective action 43
7.6 Maintenance intervals of the individual
components
44
8. Spare parts 45
9. Decommissioning, disposal 45

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 3 of 19
1. Safety
Assembly, dismantling and mainte
nance must be performed by trained
personnel in order to achieve reliability,
safety and best results.
1.1 Explanation of symbols and hints
Operating safety symbol
This symbol is placed alongside every
operating safety instruction in these op
erating instructions, wherever there is a
danger to life and limb. Observe these
instructions and in such cases proceed
with extreme caution. Pass on all the op
erating safety instructions to other
users. In addition to the instructions
contained in these operating instruc
tions, the generally applicable safety
and accident prevention regulations
must be observed; as shown here, for
example: Warning of hazard point.
Information symbol
This information symbol is placed
alongside those points in the manual
which must be specifically observed in
order to ensure that the guidelines, reg
ulations, instructions and correct oper
ating sequences are observed and to
prevent damage to or destruction of the
unit and/or other components in the
system.
These mandatory symbols are linked to
the operating safety instructions and
show which protective measures must
be complied with at the appropriate
workstations and therefore specifically
mandate a certain action, as shown here
as an example: Wear protective gloves.
These prohibition symbols are linked to
the operating safety instructions ban
ning a dangerous or risky action, as
shownhereasanexample:Donot
touch.
1.2 Operating safety instructions
Carefully read the safety instructions before using any LTG
fan coil unit. Always follow the safety instructions!
The units meet any pertinent safety standards.
The installation and maintenance of air
conditioning units may be dangerous be
cause of high pressures and electrical com
ponents being alive. Therefore, the installa
tion, maintenance, and repair must be per
formed by qualified and trained staff only.
In particular electrical connections are to be provided,
removed, or modified by authorized persons only ob
serving all relevant safety instructions.
Safety instructions in the technical documentation and
on unit labels must be followed at all times.
Do not open theunit for cleaning,maintenance, orrepair
and do not remove covers and casings (air diffuser) un
less all conducting lines have been completely discon
nected. Do not connect or remove the plug-in connector
when under tension.
Any work regarding the electrical equipment is to be
performed by skilled and trained staff only. Connections
to the main power supply and the safety earth terminal
must be executed exactly as described in the wiring dia
gram.
Electrical operation of the unit in a partly disassembled
condition or of individual components is not permitted
since earth terminals might be interrupted.
During continuous opera
tion the motor may reach
temperatures of up to
149 °F. If necessary, allow
the motor to cool off or wear
gloves.
In the heating mode a water
temperature of up to 176 °F
may be achieved. Water-
carrying parts may be hot
so do not touch with your
bare hands to avoid burns.
Be careful when performing
work on the heat exchang
ers. Blades and housing
parts are sharp-edged.
Wear gloves during work
and handling.

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 4 of 19
Continuation 1.2 Operating safety instructions
The standard version of the
heat exchangers is designed
for an operating pressure of
145 psi (testpressure232 psi).
High water pressures may be
hazardous. Higher operating
pressures, therefore, require
LTG's express permission.
Wear safety glasses.
Parts and tools.
Be careful when working
overhead and provide pro
tection against parts falling
from above.
Keep objects and dirt from entering the im
peller. A damaged fan impeller or objects
being ejected by the impeller may be haz
ardous.
Never remove the protective grille of the fan
impeller and the motor cover during opera
tion.
The casing on site also serves as a protection
and should be removed for maintenance and
cleaning only.
Avoid any additional load to the unit or the
suspensions since stability might be insuffi
cient.
The unit must be checked by an expert
immediately:
- if it has been mechanically damaged
- if it is suffering from a water damage,
- if the fan shows signs of damages (imbal
ance, damage to the bearing or motor)
- if the suspension or the casing show clear
signs of corrosion or ageing.
Do not put the unit back into operation before
all necessary maintenance and repair has
been performed by an expert !
Take the unit entirely off the main power sup
ply until all repairs have been completed by
an expert even if this might result in not being
able to operate undamaged units.
It is in any case imperative to take a damaged
unit completely off the main power supply!
2. Transport, storage, delivery
The unit requires dry and dust-free conditions during
transport, storage, installation, and operation.
The unit is supplied in corrugated board boxes secured
with straps.
Units are stacked on pallets and secured with straps.
Pallets may be moved using forklifts or cranes.
Do not removethe packaging until immediately prior to in
stallation on site to protect the unit from pollution and
damages.
LTG Aktiengesellschaft will not take re
sponsibility for any pollution of or dam
ages to the unit.
2.1 Transport Instructions
Handle units appropriately and with care during trans
port.
Do not throw, drop to the ground or bump into other items
or walls.
Make sure that units are safely fastened during transport
and avoid damage through other items.
It is recommended to always have units handled by at
least two persons.
The packaging is not weather-resistant.
2.2 Storage
Make sure that units are entirely protected against weath
ering, humidity, and other adverse conditions that might
result in damages during storage.
The storage location must meet the following climatic re
quirements:
Temperature between 41 °F and 131 °F with a relative hu
midity of 90 % max. (non-condensing).
2.3 Delivery
Standard units are normally delivered as follows:
- on pallets, with the pallet sealed in film
- fitting/regular accessories packaged with them in sepa
rate boxes
Disposal of the packaging material in accordance with lo
cal regulations.

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 5 of 19
3. Function
The fan coil unit is a recirculating air unit for cooling or
heating (2-pipe) or for cooling and heating (4-pipe) the air.
These fan coil units have been designed for installation in
sills in office and conference rooms, hotel rooms, hospi
tals and other closed rooms for room air treatment.
The fan sucks in ambient air via a heat exchanger, heating
or cooling the air and reintroducing it into the room.
Uniform distribution of the air across the entire fan is en
sured by a tangential fan impeller extending over the en
tire width. The heat exchanger is usually equipped with a
filter for protection.
Thermal energy transport to the heat exchanger is per
formed by water; water connection on the right or left.
If the cold water temperature drops in the cooling mode
below dew point of the air the condensate will be collected
by a condensate tray with possible connecting socket. For
reasons of hygiene, the unit should be dimensioned in a
way to ensure that no condensation occurs during stan
dard operation. For operation below dew point insulated
units are available.
Output is water-side controlled by valves.
The fan speed is controlled by a 0-10 V input signale to the
EC motor with low energy consumption.
For group controls a total of 5 units may be connected in
parallel.
With view to sizing,the most important data are thecaloric
output, the sound power level and the air flow rate.
The units' caloric output is determined through the fan
speed, the water flow rate, and the valve setting which
maybecontrolledbyacontroldevice.
The units' sound power and the air flow rate are controlled
throughthefanspeed.
The use of a filter results, at the same speed level, in a re
duction of both the caloric output and the air flow rate
while the sound power level of the units is higher when in
creasing the fan speed.
3.1 Intended Use
The LTG fan coil unit VFC is intended for use indoors.
It is designed for indoor ambient temperatures of
+41…+104 °F and a maximum relative humidity of up to
90 % (non-condensing).
In order to ensure safe motor functioning the ambient
temperature when installed should not exceed +104°F.
The maximum admissible water supply temperature is,
therefore, limited to +176 °F.
Any other operating conditions require the express and
written permission of LTG Aktiengesellschaft.
LTGAktiengesellschaft does not assume responsibility for
any damages resulting from unintended use.

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 6 of 19
4. Technical specifications
4.1 Specification, dimensions, technical data VFC-0
4.1.1 2-pipe system (type VFC-0/2/…/T)
Specification
Fan coil unit with one heat exchanger for heating or cool
ing the ambient air.
Water-side control by valves.
Particularly small built-in depth and height, therefore
especially appropriate for a room-saving installation in
sills.
For extremely low inlet temperatures an insulated drain
pan is available.
Vertical installation.
Water connection on the right or left.
Dimensions, weights
Size A
[inch]
B
[inch]
C
[inch]
D
[inch]
E
[inch]
Weight*
[lb]
500 20.7 19.5 22.1 28.7 27.3 28.6
630 24.7 23.5 26.1 34.8 31.3 33
800 33.7 32.5 35.1 42.7 40.3 42
1000 41.6 40.4 43 52.6 48.2 51
1250 49.5 48.3 50.9 61.1 56.1 62
* approx. values, depending on the exact model
Air outlet 6.5
2.2
0.7
3.6
4
5.1
Total length, dimension E
Dimension A
Dimension B
Unit length, dimension A
Length of condensate tray, dimension D
0.5
5.4
3
1.1
2.4
Suspension from above
(special version)
Standard:
bracket for
rear wall
installation
(accessory)
1.9
6.5
6.1
4.3 10.5 16.9
1.1 2.1 2.1
1.4
2.1
2.1 0.87
Ø0.6
Ø0.33
17.8
rubber stop
to be ordered
separately acc.
to wall clearance
Front view
Side view, right side
Auxiliary view A
Unit suspension, dimension C
2.1 61° angle of discharge
KW-RL
KW-VL
Mounting options:
- suspension from above (attachment to the sill)
- wall mounting - rear suspension
KW-VL = cold water inlet
KW-RL = cold water return

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 7 of 19
Continuation 4.1 Specification, dimensions, technical data VFC-0
4.1.1 2-pipe system (VFC-0/2/.…/T/….)
Technical data
Size
n[-]
U(EC) [V]
V[cfm]
LA18 (AC) [dB(A)]
LwA (AC) [dB(A)]
QoF/Δt1) [BTU/h*Δt QmF/Δt1) [BTU/h*Δt] QmF 2) [BTU/h] Qsens mF 2)[BTU/h]
wo/Δpw[gpm]/[Ft H2O]
Pel (AC) [W]
Pel (EC) [W]
500
I2.3 94 26 32 70.1 68.2 2,948 2,456
0.88 / 6.0
16 5
II 3.0 141 30 36 92.9 91.0 3,930 3,275 20 6
III 3.7 171 36 42 108.0 106.1 4,316 3,821 23 9
IV 4.3 200 40 46 121.3 121.3 4,804 4,367 25 11
V5.3 253 46 52 138.4 138.4 5,377 4,981 31 17
630
I2.3 100 25 31 91.0 81.5 3,521 2,934
0.88 / 6.7
16 5
II 3.0 153 29 35 111.8 111.8 4,831 4,026 20 6
III 3.7 182 35 41 128.9 128.9 5,241 4,640 23 9
IV 4.3 218 39 45 144.1 144.1 5,705 5,186 25 11
V5.3 282 46 52 164.9 164.9 6,411 5,937 31 17
800
I2.3 129 25 31 98.6 91.0 3,930 3,275
0.88 / 7.3
16 5
II 3.0 188 28 34 136.5 121.3 5,241 4,367 20 6
III 3.7 224 34 40 157.3 147.8 6,012 5,322 23 9
IV 4.3 271 38 44 180.1 174.4 6,905 6,278 25 11
V5.3 341 45 51 199.0 199.0 7,738 7,165 31 17
1000
I2.3 176 27 33 117.5 111.8 5,077 4,026
0.88 / 7.6
25 6
II 3.0 247 30 36 155.4 144.1 6,714 5,186 29 8
III 3.7 276 34 40 174.4 168.7 7,093 6,073 33 11
IV 4.3 335 38 44 197.1 193.3 7,806 6,960 36 16
V5.3 424 46 52 216.1 216.1 8,400 7,779 42 26
1250
I2.3 212 27 33 151.6 138.4 5,977 4,981
0.88 / 8.3
25 6
II 3.0 276 30 36 185.8 174.4 7,533 6,278 29 8
III 3.7 335 35 41 202.8 197.1 8,018 7,097 33 11
IV 4.3 406 38 44 219.9 214.2 8,482 7,711 36 16
V5.3 46 52 242.6 235.0 9,137 8,461 42 26
1) Specific cooling capacity (non condensing operation)
2) Cooling capacity with the following parameters: water inlet 43 °F, air inlet: 79 °F, 50 % rel. humidity
n- speed
U- control voltage EC motor
V- flow rate (approx. values, tolerance ± 10 %)
LA18 - sound pressure level
LwA - sound power level ± 3 dB(A) (without casing)
QoF - capacity (without filter)
QmF - capacity (with filter)
Qcsens mF-sensible cooling capacity (with filter)
Δt- temp. difference between suction air temp. before
entering the heat exchanger and water supply
wo- standard water flow rate*
Δpw- water-side pressure loss
Pel - electric power consumption AC motor (± 20 %)
Pel (EC) - electric power consumption AC motor (± 20 %)
* Correction for other flow rates see section 4.4.
Speed control wiring diagram see page 28.

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 8 of 19
Continuation 4.1 Specification, dimensions, technical data VFC-0
4.1.1 2-pipe system, version for extremely low inlet temperatures (type VFC-0/2/…./E/…)
Specification
Fan coil unit with one heat exchanger for heating or cool
ing the ambient air.
Water-side control by valves.
Particularly small built-in depth and height, therefore
especially appropriate for a room-saving installation in
sills.
For extremely low inlet temperatures an insulated drain
tray is available for insertion on site.
Vertical installation.
Water connection on the right or left.
Dimensions
Size A
[inch]
B
[inch]
C
[inch]
D
[inch]
E
[inch]
Weight*
[lb]
500 20.7 19.5 22.1 28.7 27.3 28.6
630 24.7 23.5 26.1 34.8 31.3 33
800 33.7 32.5 35.1 42.7 40.3 42
1000 41.6 40.4 43 52.6 48.2 51
1250 49.5 48.3 50.9 61.1 56.1 62
* approx. values, depending on the exact model
suspension from above
(special version)
standard:
bracket for
rear wall
installation
(separate
accessory)
air outlet
2.2
6.5
2.1
6.5
KW-RL
7.1
KW-VL
1.9
Front view
4
5.1
5.7
0.35 rubber stop to be
ordered
separately acc.
to wall clearance
0.7
10.5
16.917.9
19.9
4.3
1
Lateral view right side
total length, dimension E
unit length, dimension A
air outlet, dimension B
1 unit length, dimension A
length of drain tray, dimension D
5.4
1.4
5.7
0.87
9
2.4
Auxiliary view A
unit suspension, dimension C
1.1 2.1 2.1
Ø0.33
61° angle of discharge
Mounting options:
- suspension from above (attachment to the sill)
- wall mounting (rear suspension)
KW-VL = cold water inlet
KW-RL = cold water return
Technical data see standard version VFC-0/2/…./T/….

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 9 of 19
Continuation 4.1 Specifications, dimensions, technical data VFC-0
4.1.2 4-pipe system (type VFC-0/4/…./T)
Specification
Fan coil unit with one heat exchanger and two separate
water cycles for heating and cooling the ambient air.
Water-side control by valves.
Particularly small built-in depth and height, therefore es
pecially appropriate for a room-saving installation in sills.
For extremely low inlet temperatures an insulated drain
tray is available for insertion on site.
Vertical installation.
Water connection on the right or left.
Dimensions
Size A
[inch]
B
[inch]
C
[inch] D [inch]
E
[inch]
Weight *
[lb]
500 20.7 19.5 22.1 28.7 27.3 28.6
630 24.7 23.5 26.1 34.8 31.3 33
800 33.7 32.5 35.1 42.7 40.3 42
1000 41.6 40.4 43.0 52.6 48.2 51
1250 49.5 48.3 50.9 61.1 58.1 62
* approx. values, depending on exact model
Lateral view, right side
KW-RL
WW-RL
WW-VL
KW-VL
Drain tray movable
2.3
Air outlet, dimension B
Unit length, dimension A
Length of drain tray, dimension D
0.5
178
Total length, dimension E
4.13
0.8
0.7
6.5
2.5
2.22.3
6.5
7.1
50.5
3.1
16.9
10.4
View
Front view
Isometric
view
Illustration: with EC motor
and water connection on the
right (optional on the left)
View in direction of air
(arrows)
Drive always on the right
3.5
View
Bracket on the top/rear side
according to customer specification
Mounting options:
- Suspension from above (attachment to the sill)
- Wall mounting - rear suspension
KW-VL = cold water inlet
KW-RL = cold water return
WW-VL = warm water inlet
WW-RL = warm water return

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 10 of 19
Continuation 4.1 Specifications, dimensions, technical data VFC-0
4.1.2 4-pipe system (VFC-0/4/…./T)
Technical data
Size n[-] U(EC) [V] V[cfm] LA18 [dB(A)] LwA [dB(A)] QcoF
/Δt1)
[BTU/h*Δt] QcmF
/Δt1)
[BTU/h*Δt] QcmF2) [BTU/h] Qcsens2) mF [BTU/h] QhoF
/Δt
[BTU/h*Δt] QhmF
/Δt
[BTU/h*Δt] woc /Δpw [gpm]/[Ft H2O] woh/Δpw [gpm]/[Ft H2O] Pel [W]
Pel (EC) [W]
500
I2.3 94 26 32 64.4 53.1 2,293 1.911 39.8 36.0
0.88 / 4.3 0.44 / 0.83
16 5
II 3.0 141 30 36 87.2 85.3 3,685 3,071 53.1 53.1 20 6
III 3.7 171 36 42 102.4 102.4 4,162 3,685 60.7 60.7 23 9
IV 4.3 200 40 46 113.7 113.7 4,504 4,049 66.3 66.3 25 11
V5.3 253 46 52 128.9 128.9 5,009 4,640 75.8 75.8 31 17
I2.3 100 25 31 77.7 68.2 2,948 2,456 49.3 43.6
0.88 / 4.7 0.44 / 0.9
16 5
II 3.0 153 29 35 98.6 96.7 4,176 3,480 60.7 58.8 20 6
630 III 3.7 182 35 41 113.7 113.7 4,626 4,094 66.3 66.3 23 9
IV 4.3 218 39 45 127.0 127.0 5,029 4,572 73.9 73.9 25 11
V5.3 282 46 52 144.1 144.1 5,599 5,186 81.5 81.5 31 17
I2.3 129 25 31 89.1 79.6 3,439 2,866 55.0 49.3
0.88 / 5.3 0.44 / 1.0
16 5
II 3.0 188 28 34 121.3 113.7 4,913 4,094 72.0 68.2 20 6
800 III 3.7 224 34 40 140.3 134.6 5,473 4,845 79.6 77.7 23 9
IV 4.3 271 38 44 155.4 153.5 6,080 5,527 89.1 89.1 25 11
V5.3 341 45 51 174.4 172.5 6,704 6,209 96.7 96.7 31 17
I2.3 176 27 33 109.9 100.5 4,340 3,617 68.2 62.5
0.88 / 6.0 0.44 / 1.1
25 6
II 3.0 247 30 36 144.1 134.6 5,814 4,845 89.1 83.4 29 8
1000 III 3.7 276 34 40 161.1 155.4 6,322 5,595 102.4 96.7 33 11
IV 4.3 335 38 44 180.1 174.4 6,905 6,278 111.8 108.0 36 16
V5.3 424 46 52 202.8 199.0 7,738 7,165 123.2 123.2 42 26
I2.3 212 27 33 140.3 128.9 5,568 4,640 87.2 81.5
0.88 / 6.7 0.44 / 1.2
25 6
II 3.0 276 30 36 170.6 161.1 6,960 5,800 102.4 96.7 29 8
1250 III 3.7 335 35 41 185.8 182.0 7,492 6,551 115.6 109.9 33 11
IV 4.3 406 38 44 200.9 197.1 7,806 7,097 119.4 115.6 36 16
V5.3 488 46 52 223.7 219.9 8,547 7,915 130.8 127.0 42 26
1) Specific cooling capacity (non condensing operation)
2) Cooling capacity with the following parameters: water inlet = 43 °F, air inlet = 79 °F , rel. humidity = 50 % rel.
n- speed
U- control voltage EC motor
V- flow rate (approx. values, tolerance ± 10 %)
LA18 - sound pressure level, 18 m² Sabine
LwA - sound power level ± 3 dB(A) (without casing)
QcoF - cooling capacity (without filter)
QcmF - cooling capacity (with filter)
QhoF - heating capacity (without filter)
QhmF - heating capacity (with filter)
Qcsens mF -sensible cooling capacity (with filter)
Δt- temperature difference between suction air temp.
before entering heat exchanger and water supply
woc - standard water flow rate at cooling capacity *
woh - standard water flow rate at heating capacity *
Δpw- water-side pressure loss
Pel - electric power consumption AC motor (± 20 %)
Pel (EC) - electric power consumption EC motor (± 20 %)
* Correction for other flow rates see sectiion 4.4.
Speed control wiring diagram seepage28.

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 11 of 19
Continuation 4.1 Specifications, dimensions, technical data VFC-0
4.1.2 4-pipe system, for extremely low inlet temperatures (type VFC-0/4/…./E/….)
Specification
Fan coil unit with one heat exchanger and two separate
water cycles for heating and cooling the ambient air.
Water-side control by valves.
Particularly small built-in depth and height, therefore es
pecially appropriate for a room-saving installation in sills.
For extremely low inlet temperatures an insulated drain
tray is available for insertion on site.
Vertical installation.
Water connection on the right or left.
Dimensions
Size A
[inch]
B
[inch]
C
[inch]
D
[inch]
E
[inch]
Weight *
[lb]
500 20.7 19.5 22.1 29.8 27.3 35
630 24.7 23.5 26.1 33.7 31.3 42
800 33.7 32.6 35.1 42.8 40.3 53
1000 41.6 40.4 43 50.7 48.2 64
1250 49.5 48.3 51 58.5 56.1 75
* approx. values, depending on exact model
Side view, right side
KW-RL
WW-RL
WW-VL
KW-VL
Movable tray
2.3
Air outlet, dimension B
Unit length, dimension A
18.9
Drain tray length, dimension D, movable
Total length, dimension E
3.5
approx. 1
View
0.7
6.5
2.2
2.3
6.5
16.9 Basic unit length
10.4
5.4
0.25
2.5 0.79
7.9
7.1
4.1 10.8
6.5
10.9
0.9
View
Bracket on the
top/side/rear
according to
customer
specification
Front view
Isometric view
Illustration: with EC motor
and water connection on the right
If water connection is on the left:
heating with a distance to the unit
cooling directly on the unit
View onto the heat exchanger
Drive always on the right
Mounting options:
- Suspension from above (attachment to the sill)
- Wall mounting - rear suspension
Technical data see standard unit VFC-0/4/…./T/….
KW-VL = cold water inlet
KW-RL = cold water return
WW-VL = warm water inlet
WW-RL = warm water return

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 12 of 19
Continuation 4.1 Specifications, dimensions, technical data VFC-0
4.1.3 PrimaryairsupplybylineardiffuserLDB(typeVFC-0/4/…./…/../FL)
Specification
Fan coil unit special version with additional fresh air sup
ply. Via an adjustable LTG diffuser LDB, the airis blown out
in parallel to the tangential fan outlet. Optimum primary
air supply is ensured even with the fan at standstill.
Fan coil unit with one heat exchanger for heating and/or
cooling the ambient air.
Water-side control by valves.
Particularly small built-in depth and height, therefore es
pecially appropriate for a room-saving installation in sills.
Vertical installation. Water connection on the right or left.
Primary air socket front right or front left, always opposite
the water connection.
Dimensions, weights
Size A B C D E F Weight
[inch] [lb] *
500 20.7 19.5 22.1 28.7 33.8 28.3 35
630 24.7 23.5 26.1 34.8 37.8 32.3 42
800 33.7 32.5 35.1 42.7 46.9 41.3 53
1000 41.6 40.4 43 52.5 54.7 49.2 64
1250 49.5 48.3 51 60.4 62.6 57.0 77
* approx. values, depending on exact model
Front view
KW-RL
WW-RL
WW-VL
KW-VL
Air outlet Suspension from above = special version
Standard:bracket for rear-wall installation (separate accessory)
6.5
6.5
61° angle of discharge
2.2
5.1
3.6
17.8
3.2
0.79
16.9
4.13.1
0.79 7.1
2.1
4.3
0.63
1.4
Lateral view right side
Length of drain tray dimension D
Air outlet dimension B
0.5 2.4
Unit length dimension A
1.4
2.1
1
Ø0.6
3
3.6
5.4
0.86
Unit length dimension A
Total length dimension E
7.6
3.2
2.8
dimension C
Unit suspension
1.1
Ø0.33
Air distribution box dimension F
2.2
2.2
1.6
3.7
7.9
8.4
Rubber stop
to be ordered
separately acc.
to wall clearance Top view
Connection primary air
for size 500 and size 630: DN 4.0“
from size 800: DN 4.9“
LDB
Illustration: 4-pipe unit
Technical data see standard units type VFC-0/4/…./T and
type VFC-0/2/…./T. Acoustic data may vary according to
primary air rate.
The total sound power level may be calculated as
follows: LwA =10*log(10
0,1*LwA P +10 0,1 * LwA,VFC)
Sound power level LWA [dB(A)] for separate socket for
fresh air supply must be added to the unit's sound power
level:
Sound power level LWA [dB(A)]
Size V[cfm]
23.5 35.3 47 59 70.6 82.3
500 15 26 34 40 46 >45
630 15 23 31 37 42 >45
800 <15 28 25 32 37 41
1000 <15 <15 19 26 31 35
1250 <15 <15 <15 22 26 31

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 13 of 19
Continuation 4.1 Specifications, dimensions, technical data VFC-0
4.1.4 Standard primary air supply (type VFC-0/./…./…/../FS)
Specification
Fancoilunitspecialversionwithfreshairsupply,withlat
eral (left, opposite to motor) primary air box in extension
to the recirculating air outlet Optimum fresh air supply is
ensuredevenwiththefanatstandstill.
Connection is realized using a dia: 4.0 “ socket, with inte
grated damper (option).
Fan coil unit with one heat exchanger for heating and/or
cooling the ambient air.
Water-side control by valves.
Particularly small built-in depth and height, therefore es
pecially appropriate for a room-saving installation in sills.
Vertical installation. Water connection on the right or left.
Primary air socket laterally left or bottom left (the latter
only with water connection on the right).
Dimensions, weights
Size A
[inch]
B
[inch]
E
[inch]
Weight *
[lb]
500 20.7 19.5 36.5 31
630 24.7 23.5 40.4 35
800 33.7 32.5 49.5 44
1000 41.6 40.4 57.4 53
1250 49.5 48.7 65.3 64
* approx. values, depending on exact model
Lateral view left side
unit length dimensionA
air outlet dimension B
5.4
total length dimension E
2.6
Ø3.9
7.8
1.2
Auxiliary view A
Front view
17
6.5
6.5
2.3
4.2
2.2
air outlet
fresh air box
Shown: size 800, 4-pipe system
Technical data
See standard units VFC-0/4/…./T and VFC-0/2/…./T.
Acoustic data may increase according to primary air rate.
The sound power level LWA [dB(A)] for separate fresh air
box must be added to the unit's sound power level:
1 socket (dia: 4.0 “), with aluminum linear grille
VP[cfm/ft] 10.7 14.3 17.9 21.4
LwA P [dB(A)] 29 31 32 37
Pressure loss [in(wg)] 0.014 0.024 0.04 0.056
The total sound power level may be calculated as
follows: LwA =10*log(10
0,1*LwA P +10 0,1 * LwA,VFC)

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 14 of 19
Continuation 4.1 Specifications, dimensions, technical data VFC-0
4.1.5 Type VFC-0/./...././../EC
Specification
Fan coil unit with one heat exchanger with two separate
water circuits for cooling and heating.
Water-sidecontrolbyvalves.
With EC motor for all variants.
Extra small built-in depth and height, therefore especially
appropriate for a room-saving installation in sills.
For extremely low inlet temperatures an insulated drain
tray is available.
Vertical installation, water connection on the right or left
Mounting options:
- Suspension from above (to hook in the sill)
- Wall installation, mounting on rear side
Dimensions, weights, caloric data
Size A[inch] B[inch] C[inch] Weight * [lb] Voltage LA18 [dB(A)] LWA [dB(A)] Pel [W]
500 26.6 19.5 29.8 33
2.3 23 29 5
3.0 29 35 6
3.7 35 41 9
4.3 41 46 11
5.5 45 51 17
630 31.8 24.7 33.7 39 as size 500
800 38.4 31.4 42.8 51 as size 500
1000 46.3 39 50.6 62
2.3 24 30 6
3.0 29 35 8
3.7 35 41 11
4.3 41 47 16
5.5 47 53 26
1250 56.2 49.1 58.5 73 as size 1000
* approx. values, depending on version
7.2
6.5
7.91.8
4.1
1.2
2.9
6.511.40.9
2.5
0.8
2.8
Lateral view, right side, right version
Unit width dimension A
Width tangential fan dimension B
Drain tray incl. Insulating, dimension C
Drain tray, movable
0.71
Front view, right version
Proper water connection:
in direction of air (arrow).
Illustrated unit: water connection
optional on the right or left,
drive always on the right
Isometric views
right version / left version
KW-RL
WW-RL
WW-VL
KW-VL
19.5
KW-RL = cold water return
WW-RL = warm water return
WW-VL = warm water inlet
KW-VL = cold water inlet
view
0.71

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 15 of 19
4.2 Specifications, dimensions, technical data VFC-N
4.2.1 Type VFC-N/./..../T/../EC
Specification
Fan coilunit with one heat exchanger forcooling or heating
the room air (type VFC-N/2/…) resp.
with one heat exchanger and two separate circuits for
cool-ing and heating the ambient air (type VFC-N/4/…).
Water-sidecontrolbyvalves.
Particularly small built-in depth and height, therefore es
pecially appropriate for a room-saving installation in sills.
Non-condensing operation.
Vertical installation.
Water connection on the right.
Dimensions, weights
Size A(EC) B C D E Weight *
[inch] [lb]
500 25.5 19.6 23.1 21.0 22.0 33
630 30.6 24.7 28.8 26.1 27.2 40
800 37.3 31.4 34.9 32.8 33.9 51
1000 45.2 39.3 42.8 40.7 41.7 62
1250 55.0 49.1 52.6 50.5 51.6 73
* approx. values, depending on execution
Draught relief
View
3-pin plug resp. 4-pin plug Ø1/3"
0.8
2.2
2.2
Venting
KW-RL (G 1/2")
WW-VL (G 1/2")
WW-RL (G 1/2")
KW-VL (G 1/2")
1.5
7.2
0.8
7.1
4.2 3.25
4.26.31
Tray, movable
Ø1/3"6x
plain ended tube
Fixation length, dimension E
Fixation center hole distance, dim. D
Drain tray length, dimension C 1
Width tangential fan, dimension B
3.4
Unit width, dimension A
DN 0.6
Discharge
Intake
0.8 3.4 3.75
11.5
8
Lateral view, right side Lateral view, left side
Front view
Top view
Heat exchanger
connections
see below
Proper water connection:
view in direction of air (arrow)
Illustrated unit:
water connection only on the right,
drive always on the left
KW-VL = cooling - water inlet
KW-RL = cooling - water return
WW-VL = heating - water inlet
WW-RL = heating - water return
Illustration: type VFC-N/4/…./T/../EC, 4-pipe system, with EC motor

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 16 of 19
Continuation 4.2 Specifications, dimensions, technical data VFC-N
4.2.2 Type VFC-N/./..../T/../AC
Dimensions, weights
Size A(AC) B C D E Weight *
[inch] [lb]
500 28.0 19.6 23.1 21.0 22.0 33
630 33.1 24.7 28.8 26.1 27.2 40
800 39.8 31.4 34.9 32.8 33.9 51
1000 47.7 39.3 42.8 40.7 41.7 62
1250 57.5 49.1 52.6 50.5 51.6 73
* approx. values, depending on execution
Venting
KW-RL (G 1/2")
WW-VL (G 1/2")
WW-RL (G 1/2")
KW-VL (G 1/2")
Lateral view, right side Lateral view, left side
Front view
Top view
Proper water connection:
view in direction of air (arrow)
Illustrated unit:
water connection only on the right,
drive always on the left
KW-VL = cooling - water inlet
KW-RL = cooling - water return
WW-VL = heating - water inlet
WW-RL = heating - water return
Tray
Ø1/3"6x
Plain ended tube
Width tangential fan, dimension B
Fixation length, dimension E
Fixation center hole distance, dim. D
Unit width, dimension A
3.4
Drain dray length, dimension C 1
Discharge
Intake
0.8 3.4 3.75
0.6
11.5
8.5
1.5
7.2 0.6
0.8
7.1
4.2 3.25
4.26.31/3"
movable
DN 0.6
Cable fitting
(draught relief) Terminal box
View
Ø1/3"
0.8
2.2
2.2
Heat exchanger
connections
see below
Illustration: type VFC-N/4/…./T/../AC5, 4-pipe system, with AC motor

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 17 of 19
Continuation 4.2 Specifications, dimensions, technical data VFC-N
4.2.3 Type VFC-N/4/800, 4-pipe-system, size 800
Technical data
Speed n [-] V[cfm] LwA mF 2) [dB(A)] QcoF
/Δt1)
[BTU/h*Δt] Qc mF/Δt2) [BTU/h*Δt] QhoF
/Δt1)
[BTU/h*Δt] QhmF
/Δt2)
[BTU/h*Δt] woc/Δpw [gpm]/[Ft H2O] woh/Δpw [gpm]/[Ft H2O] Pel (AC) [W]
Pel (EC) [W]
I129 30 92.9 81.5 68.2 62.5
0.88 / 5.3 0.44 / 0.9
16 5
II 153 32 104.2 94.8 75.8 70.1 20 6
III 171 34 117,5 108.0 81.5 77.7 23 9
IV 200 38 127.0 121.3 87.2 83.4 25 11
V224 43 140.3 132.7 94.8 89.1 31 17
1) Values apply to the unit with air outlet grille, without filter
2) Values apply to the unit with air outlet grille, with filter
Values may vary when units are installed.
n- speed
V-flowrate(±10%)
LwA mF - sound power level ± 3 dB(A) (without casing, with filter)
QcoF - cooling capacity (without filter)
QcmF - cooling capacity (with filter)
QhoF - heating capacity (without filter)
QhmF - heating capacity (with filter)
Δt- temperature difference between suction temp.
before heat exchanger and water inlet
woc - standard water flow rate at cooling capacity
(correction for other water flow rates see from page 25)
woh - standard water flow rate at heating capacity
(correction for other water flow rates see from page 25)
Pel - electric power consumption (± 20 %)

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 18 of 19
4.3 Specifications, dimensions, technical data VFC-F
4.3.1 Special version type VFC-F, upright unit with solid floor
Specification
With base for attachment to the ground.
Dimensions, weights
Size A B Weight
[inch] [lb]
630 31 23.5 42
800 40 32.5 51
1000 47.9 40.4 59
1250 55.7 48.3 70
Unit length dimension A
Air outlet dimension B
21.8
2
1.1
Isometric view
6.5
1.5 1.2
0.23 2.4 4.2
22
24.8
7.1
6.8
Lateral view, right side Front view
0.16
Illustraton: Type VFC-2 630 (2-pipe system), without casing
Technical data
See standard units VFC-0/4/…./T (section 4.1.2) and
VFC-0/2/…./T (section 4.1.1).

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 19 of 19
Continuation 4.3 Specifications, dimensions, technical data VFC-F
4.3.2 Casing VK for upright units
Specification
4-side casing of galvanized sheet metalfor induction units
(series HF…) and fan coil units (series VF…).
Consisting of a supporting structure of channel-sections,
rear cover panel, angle panel, side mullions and air outlet
grille LDC (aluminum). All exposed surfaces are high-
quality powder coated similar to RAL, thickness of layer
60 μm.
All VF units are fixed to the casing using brackets.
Dimensions see table. Special lengths on request.
Dimensions, weights
Size A B Weight
[inch] [lb]
630 38.2 23.8 35
800 47.2 32.9 40
1000 55.1 40.7 46
1250 63.0 48.6 53
Total length, dimension A
23
Dimension B 8.3
18.34.7
23
9.7
0.4 8.8
6.3
6.7
Total length, dimension A
Front view
View from below
Lateral view left side
1.Dient zur Identifizierung der letzten Seite

Installation/Use/Maintenance Instructions
Fan coil units VFC, installation in sills
ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA VFC_USA_BA (07/19)
Phone [phone], Fax -6344 ·e-mail: [e-mail] ·Internet: www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 20 of 19
4.4 Capacity charts VFC-0
Capacity for different flow rates, 2-pipe system
Water flow rate w [gpm]
0.22 0.44 0.66 0.88 1.1 1.3
40
60
80
100
120
I
II
III Speed
IV
V
Capacity in % of the nom. capacity Q
Water-side pressure loss for different flow rates, 2-pipe system
Water flow rate w [gpm]
0.33
1.0
3.0
10
0.22 0.31 0.44 0.890.62 1.23
Water-side pressure loss Δpw[Ft (H2O)]
VFC-0/2/1250
VFC-0/2/1000
VFC-0/2/800
VFC-0/2/630
VFC-0/2/500