Technical Brochure LTG Air-Water Systems€¦ · Technical Brochure LTG Air-Water Systems The Innovation Company LTG Incorporated Induction units ... Damper control (air-side control)

Technical Brochure

LTG Air-Water Systems

The Innovation Company

LTG Incorporated

Induction units

Sill installation


LTG Incorporated

E LTG Incorporated · PO Box 2889 · Spartanburg, S.C. 29304, USA Induction sill -USA-TP (08/11)Phone +1 864 599-6340, Fax +1 864-6344 · [email protected] · www.LTG-INC.netFormer editions are invalid · Subject to technical modifications page 2 of 29

Induction units for perimeter installation

LTG Comfort Air Technology

Air Diffusers

Air Distribution

Air-Water-Systems

Content Page

Induction units 3

Type HFG-0 2-pipe system 5

Type HFG-0 4-pipe system 7

Type HFK-0 4-pipe system 9

Type HFS 4-pipe system 11

Type HFG with bypass 2-pipe system 14

Type HFL 4-pipe system 16

Type HFH 4-pipe system 18

Type QHGperimeter displacement induction unit

20

Capacity charts 23

Example for selection 27

Connection of units 28

Damper actuators 29

Specifications and schedules of prices

NotesDimensions stated in this brochure are in inches and mm.

Dimensions stated in this brochure are subject to GeneralTolerances according to DIN ISO 2768-vL.For the outlet grille special tolerances stated in the drawingapply.

Straightness and twist tolerances for extruded aluminumprofiles according to DIN EN 12020-2.

The surface finish is designed to meet the requirements forapplications in buildings - room climate according to DIN1946 part 2. Other requirements on request.

The actual specifications are available as a word docu-ment at your local distributor or at www.LTG-INC.net.


LTG Incorporated



LTG offers air distribution with various flow patterns:

- Mixed/displacement flow from the sill

- tangential flow from the sill

- IndiventR flow from the ceiling

- displacement air flow from the sill

LTG-KlimaventR units are induction units formedium/high-pressure air conditioning systems.

The induction system is a combined air and water system:

- The air system ensures ventilation and room air humiditycontrol.

- Thewater system,which is very economical for the trans-port of energy, additionally heats or cools the air usingheat exchangers.

This provides the twomost significant features of the induc-tion unit: energy-saving operation and low space require-ments.

KlimaventR induction units with casing

Models and sizesLTG offers differents models and sizes for any application.The main distinctive feature of the LTG induction units isthe way the temperature is controlled.Each of the LTG induction units is available in five sizes:500 - 630 - 800 - 1000 - 1250.

Two-pipe systemThe induction unit has only one heat exchanger throughwhich chilled water flows for cooling and hot water for heat-ing. Therefore, it is only possible to either heat or coolwithina single water circuit.

Four-pipe systemThe induction unit has two separate water systems, one forheating, the other one for cooling. Therefore, chilled andhot water will always remain separated. The four-pipe sys-tem fulfills all requirements on varying loads and small con-trol zones.

Valve control (water-side control)The heating or cooling output of the heat exchanger is con-trolled by modifying the water flow.

Damper control (air-side control)The heating or cooling output is controlled by modifying theflow of secondary air. Adjustable dampers guide the airstream through the cooling or heating coil or they divert thesecondary air through a bypass around the heat ex-changers.

Advantages High cooling and heating capacitydue high performance heat exchanger

Low energy consumptiondue to high capacity natural convection

Low noisedue to special nozzle design and arrangement ofnozzles.

Flexible nozzle assemblydue to the availability of several sets of nozzles whichmay also be combined, resulting in a particularly advant-ageous room air flow pattern to meet any demand.

No sequence overlapsThe actuator of the air-side controlled damper is de-signed to make simultaneous heating and cooling of theunit impossible.

High operational reliabilityThe air dampers are mounted on robust shafts with low-friction ball bearings.

Maintenance-free actuatorsThe electric and pneumatic actuators for all control typesare reliable and maintenance-free.

High induction ratiodue to optimum aerodynamic energy conversion of theprimary air.

Wide range of modelsThe wide selection of models includes units to meet alldemands:- air-side (damper) or water-side (valve) control- for two-pipe or four-pipe systems- each model is available in different sizes.

Optimized selectionKlimaventR induction units are dimensioned using spe-cial LTG selection software.

Fire safetydue to primary air nozzles of aluminum and primary airsockets of sheet metal (on request).


LTG Incorporated



Mode of operationThe primary air (usually the outside air requirement) fromthe central air conditioning unit is pushed through nozzlesat high speed. This causes secondary air to be pulled infrom the room.The secondary air flows through a heat exchanger and isbeing heated or cooled.Then, the primary air is mixed with the heated or cooledsecondary air inside the unit and flows into the roomthrough an outlet grille or diffuser.

secondary air

primary air

Mode of operation of LTG induction unit type HFH

Accessories, special versions(see brochure: Accessories for LTG A/C systems)

- Units without secondary air filter and safety grille on theoutlet (standard is with filter and grille).

- Condensate pan with drainage connection.

- Balancing device for the primary air connection.

- For water-side connection of the unit:screw fitting 3/8” or 1/2” with or without air vents,flexible connecting hoses with and without air vent.

- Aluminum outlet grille.

- Straight discharge neck (length 3” or 4.5”).

- Air connection from below (standard: on the side).

- Primary air nozzles of aluminum, primary air socket ofsheet metal for increased fire safety.

- Various installation types: wall mounting brackets or floorstands.

- Air outlet grille and frame.

- Thermostat connection with probe holder inside the pipe.

- Controls

Room airflow

Room airflow of induction units with a tangential air flow (smoke test pictures in three time intervals)

Cooling full load Cooling partial load Neutral bypass Heating partial load Heating full load

Control of induction unit type HFH, mode of operation


LTG Incorporated


Induction units for perimeter installationType HFG-0, two-pipe system – cooling or heating

SpecificationInduction unit with one heat exchanger for heating or cool-ing the secondary air.Central water-side control.Vertical or horizontal installation.Air connection on the right, left or from below.Water connection on the right or left.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

E[inch][mm]

50019.57(497)

18.39(467)

20.83(529)

24.53(623)

23.03(585)

63025.28(642)

24.09(612)

26.53(674)

28.27(718)

28.74(730)

80031.38(797)

30.2(767)

32.64(829)

34.37(873)

34.84(885)

100039.25(997)

38.07(967)

40.51(1029)

42.24(1073)

42.72(1085)

125048.9(1242)

47.72(1212)

50.16(1274)

51.89(1318)

52.56(1335)

SelectionThe technical specifications on the following page are validunder the following conditions:Selection of unit: - for standard water flow rates

- with filter- with rubber nozzles- with air outlet neck- without casing

Corrections for other water quantities, see page 23.

Without filter: output increases by 5%.

With aluminumnozzles: sound power level plus 2 - 3 dB(A).

According to room configuration, sound pressure level re-duced by 2 - 7 dB(A).

For other conditions the stated performancedatamayvary.

The heating performance data for natural convection QEcare based on the following:Room air temperature 68 F (at standard water flow rate)Water supply temperature 158 F t = 90 F

13.78(350)

7.2 (183)

7.09(180)

min. 1.97 (50)

2.24 (57)

2.24(57)

min. 0.39 (10)1.38(35)

min.0.39(10)

min.3.15(80)

1.97 (50)

externalØ 3.94(100)

air outletinside width 2.76 (70)

air outlet neck(accessory)

Subject to technical modifications. Actual drawings on request.

water return

water inlet

0.63 (16)

1.66 (42)

ca. 0.8 (20)

overall length, dimension D

length of unit, dimension A

air outlet, dimension B

suspension of unit, dimension C

condensate receiver, dimension E

add 1” (25 mm)for eachdrainage socket

Dimension in “ (mm)

0.91(23)

2.76(3.94)

(70(100))


LTG Incorporated


Induction units for perimeter installationType HFG-0, two-pipe system – cooling or heating

Technical data size 500 Technical data size 1000

∆p"H2O

VP[cfm]

LwA[dB(A)]

NC QP/∆tBTU/h·∆t-1

Qc/∆tBTU/h·∆t-1

Qh/∆tBTU/h·∆t-1

0.8182429

262528

19.024.632.2

55.062.566.3

55.062.566.3

1.0182429

282729

19.024.632.2

56.964.470.1

56.964.470.1

1.218242935

29323033

19.024.632.237.9

58.868.273.977.7

58.868.273.977.7

QEc = 1,430 BTU/hm = 24.2 lbspw at woc = 7.2 feet with 0.88 gpmpw at woh = 6.0 feet with 0.88 gpm

∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8384759

303033

41.751.262.5

113.7125.1134.6

113.7125.1134.6

1.0384759

323134

41.751.262.5

117.5130.8142.2

117.5130.8142.2

1.238475965

33363537

41.751.262.570.1

121.3136.5147.8151.6

121.3136.5147.8151.6


Technical data size 630 Technical data size 1250∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8242935

272628

24.632.237.9

72.079.685.3

72.079.685.3

1.0242935

293129

24.632.237.9

75.885.391.0

75.885.391.0

1.224293541

31333133

24.632.237.943.6

77.787.294.898.6

77.787.294.898.6


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8475974

323236

51.262.579.6

144.1161.1174.4

144.1161.1174.4

1.0475974

333637

51.262.579.6

149.7168.7182.0

149.7168.7182.0

1.247597488

34373841

51.262.579.694.8

155.4174.4189.5200.9

155.4174.4189.5200.9


Technical data size 800

∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8293847

282831

32.241.751.2

89.1102.4109.9

89.1102.4109.9

1.0293847

303332

32.241.751.2

92.9108.0115.6

92.9108.0115.6

1.229384753

32343335

32.241.751.256.9

96.7111.8119.4125.1

96.7111.8119.4125.1


Legend

∆p - static pressure at the primary air socketVP - primary air flow rate (± 10 %)LwA - sound power (± 3 dB)QP - cool. capacity of primary air (fresh air) (± 5 %)Qc - cool. cap., secondary air (heat exch.) (± 5 %)Qh - heating capacity, secondary air (± 5 %)QEc - heating capacity with natural convectionm - weightwoc - standard water flow rate at cooling capacitywoh - standard water flow rate at heating capacity∆t - temperature difference between

air temperature entering the heat exchangerand water supply temperature

∆tP - temperature difference between room airand primary air

∆pw - water-side pressure loss


LTG Incorporated


Induction units for perimeter installationType HFG-0, four-pipe system – cooling and heating

SpecificationInduction unit with one heat exchanger for heating andcooling the secondary air, for high outputs at low water flowrates.Water-side control by valves.Vertical or horizontal installation.Air connection on the right, left or from below.Water connection on the right or left.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

E[inch][mm]

500 19.57(497)

18.39(467)

20.83(529)

25.67(652)

23.03(585)

630 25.28(642)

24.09(612)

26.53(674)

31.38(797)

28.74(730)

800 31.38(797)

30.2(767)

32.64(829)

33.54(852)

34.84(885)

1000 39.25(997)

38.07(967)

40.51(1029)

45.35(1152)

42.72(1085)

1250 48.9(1242)

47.72(1212)

50.16(1274)

55.2(1402)

52.56(1335)



Corrections for other water quantities, see page 25.Without filter: output increases by 5%.With aluminum nozzles: sound power level + 2-3 dB(A).According to room configuration, sound pressure level re-duced by 2 - 7 dB(A).


The heating performance data for natural convection QEkare based on the following:Room air temperature 68 F (at standard water flow rate)Water supply temperature 158 F t = 90 F


16.51(421)

7.36 (187)

2.36 (60)

0.57 (14.5)

0.98 (25)

KKW-RL

HZG-RL

HZG-VLKKW-VL





air outlet inside width 2.76 (70)

2.24(57)

Ø3.94(100)

With water connection on the left:warm water connection at the front, chilled waterconnection behind warm water connectionWith water connection on the right:chilled water connection at the front, warm waterconnection behind chilled water connectionView towards heat exchangerShown unit: water left side - air right side

1.97 (50)

3.27(83)4.45(113)

7.36(187)

13.78(350)

2.76(70)

1.81(46)

2.44 (62)

0.8 (20)

Ø0.59(15)

2.36 (60)

0.63 (16)

2.24(57)

0.63 (16)

2.72

(69)

clamp loose


KKW-VL = cooling - water inletKKW-RL = cooling - water returnHZG-VL = heating - water inletHZG-RL = heating - water return



LTG Incorporated


Induction units for perimeter installationType HFG-0, four-pipe system – cooling and heating


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8182429

262528

19.024.632.2

43.649.353.1

36.041.745.5

1.0182429

282729

19.024.632.2

43.651.255.0

37.941.747.4

1.218242935

29323033

19.024.632.237.9

47.455.060.762.5

39.847.451.253.1


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8384759

303033

41.751.262.5

94.8104.2113.7

79.687.294.8

1.0384759

323134

41.751.262.5

96.7106.1115.6

79.689.196.7

1.238475965

33363537

41.751.262.570.1

104.2113.7127.0138.4

87.296.7106.1113.7



VP[cfm]

LwA[dB(A)]




0.8242935

272628

24.632.237.9

56.962.568.2

47.453.156.9

1.0242935

293129

24.632.237.9

58.864.470.1

49.355.058.8

1.224293541

31333133

24.632.237.943.6

62.570.175.879.6

51.258.864.466.3


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8475974

323236

51.262.579.6

121.3134.6147.8

100.5111.8123.2

1.0475974

333637

51.262.579.6

121.3138.4149.7

102.4115.6125.1

1.247597488

34373841

51.262.579.694.8

134.6151.6164.9174.4

111.8127.0136.5145.9



∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8293847

282831

32.241.751.2

70.181.587.2

60.768.273.9

1.0293847

303332

32.241.751.2

73.983.489.1

62.570.175.8

1.229384753

32343335

32.241.751.256.9

81.589.196.7102.4

66.373.981.587.2


Legend






LTG Incorporated


Induction units for perimeter installationType HFK-0, four-pipe system – cooling and heating

SpecificationInduction unit with one heat exchanger for heating andcooling the secondary air, for high outputs at low water flowrates.Water-side control by valves.Vertical or horizontal installation.Air connection on the right, left or from below.Water connection on the right or left.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

E[inch][mm]

630 25.28(642)

24.09(612)

26.53(674)

31.38(797)

28.74(730)

800 31.38(797)

30.2(767)

32.64(829)

37.48(952)

34.84(885)

1000 39.25(997)

38.07(967)

40.51(1029)

45.35(1152)

42.72(1085)

1250 48.9(1242)

47.72(1212)

50.16(1274)

55.2(1402)

52.56(1335)



Corrections for other water quantities, see page 24 and 26.Without filter: output increases by 5%.With aluminumnozzles: sound power level plus 2 - 3 dB(A).According to room configuration, sound pressure level re-duced by 2 - 7 dB(A).

For other conditions the stated performancedatamayvary.The heating performance data for natural convection QEcare based on the following:Room air temperature 68 F (at standard water flow rate)Water supply temperature 158 F t = 90 F


0.59(15)

0.98 (25) movable condensate receiver, dimension E

2.24(57)

3.94(100)

2.44 (62)

KKW-RL

HZG-RL

HZG-VLKKW-VL

7.36 (187)

2.17(55)

13.27(337)

8.54(217)3.43(87)

0.57 (14.5) air outlet inside width 2.76 (70)

17.13(435)


length of unit, dimension A2.44 (62)

572.24(57)




air outletneck

(accessory)

2.44 (62)

Note:air connectiononly at oneside possible

With water connection on the left:warm water connection at the front, chilled waterconnection behind warm water connectionWith water connection on the right:chilled water connection at the front, warm waterconnection behind chilled water connectionView towards heat exchangerShown unit: water left side - air right side


LTG Incorporated


Induction units for perimeter installationType HFK-0, four-pipe system – cooling and heating


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.6242935

272728

24.632.237.9

64.470.172.0

36.037.941.7

0.8242935

272829

24.632.237.9

66.373.979.6

37.939.841.7

1.0242935

282930

24.632.237.9

70.177.783.4

37.941.743.6

1.2293541

293031

24.632.237.9

79.687.291.0

43.645.547.4


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.6354453

282930

37.949.356.9

102.4109.9113.7

55.056.962.5

0.8354453

282931

37.949.356.9

104.2115.6127.0

58.862.566.3

1.0354453

303133

37.949.356.9

113.7123.2132.7

60.764.466.3

1.2445359

323436

49.356.962.5

125.1134.6138.4

68.270.172.0



VP[cfm]

LwA[dB(A)]




0.6293847

272829

32.241.751.2

81.589.192.9

45.547.447.4

0.8293847

272930

32.241.751.2

83.492.9100.5

47.449.351.2

1.0293847

293032

32.241.751.2

91.098.6104.2

49.351.255.0

1.2384753

313334

41.751.256.9

100.5108.0111.8

53.156.958.8


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.6354759

272830

37.951.262.5

128.9140.3151.6

60.766.368.2

0.8354759

282931

37.951.262.5

136.5149.7161.1

62.568.272.0

1.0354759

293032

37.951.262.5

142.2155.4168.7

66.372.079.6

1.2475971

313336

51.262.577.7

159.2176.3180.1

75.877.779.6


1) with 61 °F water supply temperature, 79 °F room temp.at a height of 3.6 ft and non-condensing operation

2) with 61 °F primary air temp. and 79 °F air inlet temp.3) with 158 °F water supply temp. and 68 °F air inlet temp.Values are given for the following conditions:- Standard water flow rate- Unit with filter Gs/K80z- With primary air nozzles of plastic- With discharge duct 2.76”- Without casingReduced capacity (depending on exact operating point)- without air outlet socket ca. 5 %- without filter < 5 %- with mixed/displacement flowdeflector in the discharge duct up to approx. 20 %

Legend∆p - static pressure at the primary air socketVP - primary air flow rate (± 10 %)LwA - sound power (± 3 dB)QP - cooling capacity of primary air (fresh air) (± 5 %)Qk - cooling cap., secondary air (heat exch.) (± 5 %)Qh - heating capacity, secondary air (± 5 %)QEc - heating capacity with natural convectionm - weightwoc - standard water flow rate at cooling capacitywoh - standard water flow rate at heating capacity∆t - temperature difference between





LTG Incorporated


Induction units for perimeter installationType HFS, four-pipe system – cooling and heating

SpecificationSpace-saving induction unit with an extremely low in-stallation height of 5.87” (149 mm).With one heat exchanger for heating and cooling the se-condary air, for high outputs at low water flow rates (two-pipe unit for cooling only on request).Water-side control by valves.Vertical installation.Air connection on the right or left.Water connection on the right or left.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

E[inch][mm]

500 19.57(497)

18.39(467)

20.83(529)

24.53(623)

23.03(585)

630 25.28(642)

24.09(612)

26.54(674)

28.27(718)

28.74(730)

800 31.38(797)

30.2(767)

32.64(829)

34.37(873)

34.84(885)

1000 39.25(997)

38.1(967)

40.51(1029)

42.24(1073)

42.72(1085)

1250 48.9(1242)

47.72(1212)

50.15(1274)

51.89(1318)

52.56(1335)



Corrections for other water quantities, see page 25.Without filter: output increases by 5%.With aluminumnozzles: sound power level plus 2 - 3 dB(A).According to equipment, sound pressure level reduced by2 - 7 dB(A).

For other conditions the stated performancedatamayvary.The heating performance data for natural convection QEcare based on the following:Room air temperature 68 F (at standard water flow rate)Water supply temperature 158 F t = 90 F


With water connection on the left:warm water connection at the front, chilled water connectionbehind warm water connectionWith water connection on the right:chilled water connection at the front, warm water connectionbehind chilled water connectionView towards heat exchangerShown unit: water left side - air right side

With 1/2” connection air vent is always on top.

* Distance may be reduced to 0.4 - 0.8” (10-20 mm)if casing has a 50% free area.

KKW-RL

HZG-VL

HZG-RL

KKW-VL

unit length, dimension A

0.69 (17.5)

unit dimension, dimension Coutlet, dimension B



2.13 (54)

2.13(54)

14.17(360)

min. 1.97 (50)*

min.0.39 (10)

min.0.39(10)

min.3.15(80)

0.47 (12)

145

7.36(187)

7.2(183)

4.41(112)

5.78 (149) including filter

1.97 (50) outlet width0.79 (20)

0.04-1.1

8(1-30)

ext. diam.Ø 3.15(80)

KKW-VL = cooling - water inletKKW-RL = cooling - water returnHZG-VL = heating - water inletHZG-RL = heating - water re-turn

Dimension in “(mm)Subject to technical modifications. Actual drawings on request.


LTG Incorporated




∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8152432*

262933

15.224.634.1

36.041.745.5

28.434.136.0

1.0152432*

273034

15.224.634.1

37.945.551.2

30.336.041.7

1.2152432*35*

28313536

15.224.634.137.9

41.753.158.862.5

32.241.747.449.3


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8293847*

293036

32.241.751.2

89.1100.5106.1

70.179.683.4

1.0293847*

303237

32.241.751.2

92.9104.2113.7

73.983.491.0

1.2293847*59*

31333840

32.241.751.262.5

98.6109.9117.5123.2

77.787.292.998.6



VP[cfm]

LwA[dB(A)]




0.8182635*

272933

19.028.437.9

43.651.260.7

34.139.847.4

1.0182635*

283034

19.028.437.9

45.553.164.4

36.041.751.2

1.2182635*44*

29313537

19.028.437.947.4

47.456.970.177.7

37.945.555.060.7


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8384759*

313236

41.751.262.5

119.4125.1134.6

94.8100.5106.1

1.0384759*

323439

41.751.262.5

123.2130.8140.3

98.6104.2111.8

1.2384759*74*

33354042

41.751.262.579.6

127.0136.5147.8157.3

100.5108.0117.5125.1



∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8243244*

283034

24.634.147.4

60.772.081.5

47.456.964.4

1.0243244*

293135

24.634.147.4

60.775.887.2

49.360.770.1

1.2243244*53*

30323638

24.634.147.456.9

64.479.692.9100.5

51.262.573.979.6


Legend

∆p - static pressure at the primary air socketVP - primary air flow rate (± 10 %)LwA - sound power (± 3 dB)QP - cool. capacity of primary air (fresh air) (± 5 %)Qc - cool. capacity, secondary (heat exch.) (± 5 %)Qh - heating capacity, secondary (± 5 %)QEc - heating capacity with natural convectionm - weightwoc - standard water flow rate at cooling capacitywoh - standard water flow rate at heating capacity∆t - temperature difference between



∆pw - water-side pressure loss* Air flow rate only possible with the use of alu nozzles


LTG Incorporated



Serial connectionIf for reasons of space the induction units cannot be conn-ected individually through an air distribution duct, severalunits with low primary air flow rates may be connected in aserial set-up. The maximum number of units depends onthe primary air flow rate.The first unit in air flow direction receives the full air flowrate, i.e. in case of a flow rate of 23.5 cfm (40m3/h) per unitand 5 units, e.g. a total flow rate of 118 cfm (200 m3/h).Therefore, the air velocity entering the first unit is high andwill produce the decisive flow noises for the overall soundlevel.The pressure loss between the units is small.The sound power increase depends on the primary air flowrate, the nozzle pressure, the number of units and the unitsize.

Design exampleAir flow rate per unit 23.5 cfm (40 m3/h)Total flow rate 118 cfm (200 m3/h)Sound power per unit 28 dB(A)

Increase of sound power leveldue to increased air speed 32 dB(A) per unitTotal sound power level (5 units): 39 dB(A)

Supply air

8.27 (210)

(60)(10)

(10)

(10)

15.35(390)

5.43(138)

1.65 (42)

(140) 4.33(110)

2.36 (60)

19.9(483)

Lateral viewenlarged

pipe diameterwith insulation

Dimensions in “ (mm)


5.51

1.65 (42)

1.89 (48)

1.89 (48)

2.360.39

0.39

0.39

Installation example of serial connection: 5 HFS 1000 connected in series. Units with duct connection in the false floor.


LTG Incorporated


Induction units for perimeter installationType HFG with bypass, two-pipe system - cooling and heating

SpecificationInduction unit with one heat exchanger for heating or cool-ing the secondary air, for installation in window sills.Adjustment of the bypass dampers for air-side control witha built-in pneumatic or electric actuator.Air connection on the right, left or from below.Water connection on the right or left.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

E[inch][mm]

..500 19.57(497)

18.39(467)

20.83(529)

27.24(692)

23.03(585)

630 25.28(642)

24.09(612)

26.53(674)

32.96(837)

28.74(730)

800 31.38(797)

30.2(767)

32.64(829)

39.06(992)

34.84(885)

1000 39.25(997)

38.07(967)

40.51(1029)

46.93(1192)

42.72(1085)

1250 48.9(1242)

47.72(1212)

50.16(1274)

56.57(1437)

52.56(1335)



Corrections for other flow rates, see page 23.

Without filter: output increases by 5%.With aluminum nozzles: sound power level + 2-3 dB(A).According to room configuration, sound pressure level re-duced by 2 - 7 dB(A).


The heating performance data for natural convection QEcare based on the following:Room air temperature 68 F (at standard water flow rate)Water supply temperature 158 F t = 90 F

water return

water inlet

0.63 (16)

abt. 135

abt. 0.8 (20)

spacerequirement

fordamperactuatorde-

pendingonbrand





unit suspension, dimension C



7.2 (183)

(23)

min. 1.97 (50)

2.24 (57)min. 10

2.76(3.94)

(70(100))

external Ø3.94 (100)



0.91

13.78(350)

7.09(180)

2.24(57)

1.38(35)

min.0.39(10)

min.3.15(80)

air outletinside width 2.76 (70)


LTG Incorporated


Induction units for perimeter installationType HFG with bypass, two-pipe system – cooling or heating


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8182429

262528

19.024.632.2

53.162.566.3

53.162.566.3

1.0182429

282729

19.024.632.2

56.964.470.1

56.964.470.1

1.218242935

29323033

19.024.632.237.9

58.868.273.977.7

58.868.273.977.7

QEc = 812 BTU/hm = 24.2 lbspw at woc = 7.2 feet with 0.88 gpmpw at woh = 6.0 feet with 0.88 gpm

∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8384759

303033

41.751.262.5

113.7125.1134.6

113.7125.1134.6

1.0384759

323134

41.751.262.5

117.5132.7142.2

117.5132.7142.2

1.238475965

33363537

41.751.262.570.1

121.3136.5147.8151.6

121.3136.5147.8151.6



VP[cfm]

LwA[dB(A)]




0.8242935

272628

24.632.237.9

72.079.685.3

72.079.685.3

1.0242935

293129

24.632.237.9

73.985.391.0

73.985.391.0

1.224293541

31333133

24.632.237.943.6

77.787.294.898.6

77.787.294.898.6


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8475974

323236

51.262.579.6

144.1161.1174.4

144.1161.1174.4

1.0475974

333637

51.262.579.6

149.7168.7182.0

149.7168.7182.0

1.247597488

34373841

51.262.579.694.8

155.4174.4189.5200.9

155.4174.4189.5200.9



∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8293847

282831

32.241.751.2

89.1102.4109.9

89.1102.4109.9

1.0293847

303332

32.241.751.2

92.9108.0115.6

92.9108.0115.6

1.229384753

32343335

32.241.751.256.9

96.7111.8119.4125.1

96.7111.8119.4125.1


Legend






LTG Incorporated


Induction units for perimeter installationType HFL, four-pipe system – cooling and heating

SpecificationInduction unit with two separate heat exchangers for heat-ing and cooling the secondary air.Adjustment of the bypass dampers for air-side control witha built-in pneumatic or electric actuator.Vertical or horizontal installation.Air connection on the right, left or from below.Water connection on the right or left (opposite to the aircon-nection).

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

50019.57(497)

18.39(467)

20.83(529)

27.13(689)

63025.28(642)

24.09(612)

26.53(674)

32.83(834)

80031.38(797)

30.2(767)

32.64(829)

38.94(989)

100039.25(997)

38.07(967)

40.51(1029)

46.81(1189)

125048.9(1242)

47.72(1212)

50.16(1274)

56.46(1434)



Corrections for other water quantities, see page 23 and 24.





The heating performance data for natural convection QEcare based on the following:Room air temperature 68 F (standard water flow rate)Water supply temperature 158 F t = 90 F

abt. 5.2(132)

abt. 0.8 (20)

min. 0.39(10)min. 1.97 (50)

23

2.32 (59)

9.17 (233)

KKW-RL

min.0.39(10)

min.3.15(80)

19.76(502)

17.4(442)

2.32(59)

1.06(27)

8.03 (204)

6.73 (171)

1.57(40)

1.97 (50)

9.25(235)

5.83(148)

HZG-RL

KKW-VL

0.63 (16)

HZG-VL


space requirement for damper actuatordepending on brand, on the right or left

air outlet grille, e.g. LTG type LDC

air outlet, inside width 2.76 (70)suspension of unit, dimension C




condensate drainon request,ext. Ø 19/32”


ext. Ø3.94 (100)

Dimensionsin “ (mm)

0.04-1.18

(1-30)


LTG Incorporated


Induction units for perimeter installationType HFL, four-pipe system – cooling and heating


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8182429

262528

19.024.632.2

45.551.255.0

34.137.941.7

1.0182429

282729

19.024.632.2

49.355.060.7

36.039.843.6

1.218242935

29323033

19.024.632.237.9

51.256.962.566.3

36.039.843.647.4


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8384759

303033

41.751.262.5

94.8102.4113.7

72.077.783.4

1.0384759

323134

41.751.262.5

100.5109.9119.4

73.979.687.2

1.238475965

33363537

41.751.262.570.1

106.1115.6127.0130.8

75.881.589.191.0



VP[cfm]

LwA[dB(A)]




0.8242935

272628

24.632.237.9

60.766.372.0

45.549.353.1

1.0242935

293129

24.632.237.9

64.472.077.7

47.451.255.0

1.224293541

31333133

24.632.237.943.6

68.273.981.585.3

49.353.155.058.8


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8475974

323236

51.262.579.6

121.3132.7145.9

91.098.6108.0

1.0475974

333637

51.262.579.6

128.9142.2155.4

94.8100.5109.9

1.247597488

34373841

51.262.579.694.8

136.5147.8164.9172.5

96.7106.1111.8119.4



∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8293847

282831

32.241.751.2

75.885.391.0

56.962.568.2

1.0293847

303332

32.241.751.2

81.591.098.6

58.864.470.1

1.229384753

32343335

32.241.751.256.9

85.394.8104.2108.0

60.766.370.173.9


Legend






LTG Incorporated


Induction units for perimeter installationType HFH, four-pipe system – cooling and heating

SpecificationInduction unit with two separate heat exchangers for heat-ing and cooling the secondary air.Adjustment of the bypass dampers for air-side control witha built-in pneumatic or electric actuator.High heating capacity for natural convection.Vertical or horizontal installation.Water and air connection separately, on the right or left.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D[inch][mm]

50019.57(497)

18.39(467)

20.83(529)

27.24(692)

63025.28(642)

24.09(612)

26.53(674)

32.95(837)

80031.38(797)

30.2(767)

32.64(829)

30.06(992)

100039.25(997)

38.07(967)

40.51(1029)

46.93(1192)

125048.9(1242)

47.72(1212)

50.16(1274)

56.57(1437)



Corrections for other water quantities, see page 23 and 24.





The heating performance data for natural convection QEcare based on the following:Room air temperature 68 F (standard water flow rate)Water supply temperature 158 F t = 90 F

abt. 5.31 (135)

abt. 0.8(20)

min. 0.39(10)

min. 1.97 (50)

1.3 (33)

9.13 (232)

HZG-VL

KKW-RL

min.1.97(50)

min.3.15(80)

17.52(445)

8.27(210)

1.02(26)

0.91(23)

4.96 (126)

3.66 (93)

101,5

6.61(168)

6.14(156)

HZG-RL

KKW-VL

0.63 (16)

0.91 (23)

5.39(137)

2.36 (60)

air outlet grille, e.g. LTG type LDC

air outlet, inside width 2.76 (70)

space requirement for damper actuatordepending on brand, on the right or left

suspension of unit, dimension C




pipe coupling CU 12 x 1 (transition coupling on request)

KKW-VL = cooling - water inletKKW-RL = cooling - water returnHZG-VL = heating - water inletHZG-RL = heating - water returnSubject to technical modifications. Actual drawings on request.

condensate drainon request,ext. Ø 19/32”

Dimensionsin “ (mm)

0.04-1.18

(1-30)

ext. Ø3.94 (100)

2.76(3.94)

(70(100))


LTG Incorporated


Induction units for perimeter installationType HFH, four-pipe system – cooling and heating


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8182429

262528

19.024.632.2

51.256.962.5

32.137.943.6

1.0182429

282729

19.024.632.2

55.060.766.3

36.039.843.6

1.218242935

29323033

19.024.632.237.9

56.964.470.173.9

37.941.745.547.4


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8384759

303033

41.751.262.5

106.1115.6125.1

72.079.687.2

1.0384759

323134

41.751.262.5

113.7123.2132.7

75.881.589.1

1.238475965

33363537

41.751.262.570.1

121.3130.8140.3144.1

77.783.491.094.8



VP[cfm]

LwA[dB(A)]




0.8242935

272628

24.632.237.9

68.273.979.6

47.451.255.0

1.0242935

293129

24.632.237.9

73.979.685.3

49.351.255.0

1.224293541

31333133

24.632.237.943.6

77.785.389.194.8

51.253.156.960.7


∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8475974

323236

51.262.579.6

138.4149.7161.1

92.9100.5109.9

1.0475974

333637

51.262.579.6

147.8159.2170.6

96.7102.4111.8

1.247597488

34373841

51.262.579.694.8

155.4168.7182.0193.3

100.5106.1113.7123.2



∆p"H2O

VP[cfm]

LwA[dB(A)]




0.8293847

282831

32.241.751.2

87.294.8102.4

58.864.470.1

1.0293847

303332

32.241.751.2

92.9102.4108.0

60.766.372.0

1.229384753

32343335

32.241.751.256.9

96.7106.1113.7119.4

62.568.272.075.8


Legend






LTG Incorporated


Induction units for perimeter installationPerimeter displacement induction unit type QHG

View of unit

LTG perimeter displacement induction unit type QHG(example with complete control unit (optional))

The LTG perimeter displacement induction unit type QHGconsists of a two-row heat exchanger for heating and cool-ing and a variable air displacement distributingbox toadaptto different sill geometries.

Advantages Comfort- High thermal comfort due to displacement effect.- Improved indoor air quality (IAQ) as pollutants are re-moved from the occupied zone by ascending convectioncurrents.

- Quick reduction of temperature difference between sup-ply and room air.

Economy- Energy savings by directing the cool air flow from the floorupwards.

- Heating and cooling in one unit.- Simple installation.

Flexibility- Centralized zone control.- Outlet can be adapted to suit various sill heights andwidths.

Selection- The sizing of the units is done with LTG selection soft-ware.

LEED credits

Perimeter displacement sill installation.(smoke picture in three time intervals)

Functional principlePrimary air, which is discharged from the nozzles at highspeed, draws secondary air from the room through the heatexchanger due to the induction effect. Based on the watertemperature in the heat exchanger, the air is either heatedor cooled. The secondary air then enters the perimeter dis-placement distributing box along with the primary air.

Uniformity of discharge over the entire outlet height andwidth is guaranteed by specially arranged guide vanes inthe distributing box. An additional induction effect isachieved by the special arrangement of the outlet open-ings, resulting in a quick reduction of temperature diffe-rences.

When designing the sill, the directions (see page 21) willhave to be followed to ensure a trouble free operation of theventilation system. The LTG Engineering Services are atyour disposal to discuss any technical details.


LTG Incorporated



DesignTorsion-resistant casing of galvanized sheet metal. Heatexchanger designed for high output, consisting of coppertubes with press-fitted aluminum fins. Maximum operatingpressure (standard version): 14.5 psi (10 bar). Replacea-ble primary air nozzles of plastic, designed for inductionwith high efficiency at low noise and effective reflection ofthe primary noise.

Connection for hot and cold water, condensate andprimary air on the side of the unit.

Primary air socket of plastic with an outer diameter of4“ (100 mm).

Condensate tray of galvanized sheetmetalwith anoptional19/32” diameter condensate drain connection on request.

Also on request, self-extinguishing easily replaceable se-condary air filter of synthetically bonded polyamide fibers.

Easily detachable distribution box with guide vanes for airflow deflection at low pressure loss for uniform dischargeand a secondary induction effect, adaptable to varying sillheights and widths.

Product rangeSize: 500 630 800 1000 1250Outlet length: 31.5” 40” 47” 55” 63”

The above mentioned outlet widths are standard and maybe adjusted to the sill, if required (*).The standard outlet height is 16.5” (420 mm).

Accessories, special versions- Optional as a two-pipe induction unit, for heating or alter-natively cooling only.

- Galvanized condensate tray with drainage connection.

- Primary air flow balancing damper.

- Non-combustible aluminum nozzles and primary airsockets of sheet steel for improved fire safety.

- Easy-to-replace self-extinguishing secondary air filter.

- Full-way valve with 3 point control (24 V)

- Master/slave control.

Dimensions

Size A[inch][mm]

B[inch][mm]

C[inch][mm]

D*[inch][mm]

Weight[lbs][kg]

500 19.57(497)

21.14(537)

23.03(585)

31.5(800)

33(15)

630 25.28(642)

26.85(682)

28.74(730)

39.37(1000)

41.8(19)

800 31.38(797)

32.95(837)

34.84(885)

47.24(1200)

48.4(22)

1000 39.25(997)

40.83(1037)

42.72(1085)

55.12(1400)

59.4(27)

1250 48.9(1242)

50.47(1282)

52.56(1335)

62.99(1600)

72.6(33)

air connec-tion Ø 3.94(100)

Subject to technical data.Actual drawings on request.

HZG-VL: heating - water inletHZG-RL: heating - water re-turn

KKW-VL: cooling - water inletKKW-RL: cooling - water re-turn

HZG-VLKKW-VL

HZG-RL

KKW-RL

the free area

of the casing

must at least

be 50 % 3.74

ca. 7.2 3.15

0.94

3.15 2.91

=

0.47

2.24

1.26

0.39

14.17(360)

2.24

outletheight

30.71(780)

2.8

1.02

4.92 8.5

10.47

0.31

0.47

=

113

1.57

D/2 - A/2

2.281.57

4.723.15

0.79

1.57

Ø0.4

View forarrange-ment right/left

To avoid short-circuits betweenthe air intake and air outlet theunit will have to be sealed againstthe facade.

min. 1.97(50)

con-dens.drainØ19/32”If con-densatetray iscentered

outlet length,dimension D

condensate tray, movable, dimension Cunit suspension, dimension Blength of induction unit, dim. A

* Given outlet widthsand heights may beadapted to the sill onrequest

separate partmounting

With water connection on the left (see figure):warm water connection at the front, chilled waterconnection behind warm water connectionWith water connection on the right:chilled water connection at the front, warm waterconnection behind chilled water connectionWater connection always bent downwards Dimension in “

( )

16.54(420)


LTG Incorporated




nozzle ∆p

"H2OVP[cfm]

LA18[dB(A)]




Y0.81.21.6

101214

192528

13.317.119.0

37.945.549.3

28.434.136.0

A0.81.21.6

151821

212529

19.024.628.4

43.649.355.0

32.237.941.7

B0.81.21.6

212528

222731

28.434.137.9

49.355.058.8

36.041.745.5

QEc = 426 BTU/hpw at woc = 0.7 feet with 0.35 gpmpw at woh = 0.7 feet with 0.35 gpm

nozzle ∆p

"H2OVP[cfm]

LA18[dB(A)]




Y0.81.21.6

202528

242933

26.534.137.9

75.889.198.6

56.966.373.9

A0.81.21.6

293641

263135

39.847.455.0

87.2100.5109.9

66.375.881.5

B0.81.21.6

414957

293438

55.066.375.8

96.7109.9119.4

72.083.489.1



nozzle ∆p

"H2OVP[cfm]

LA18[dB(A)]




Y0.81.21.6

141619

202630

19.022.724.6

49.356.960.7

36.041.745.5

A0.81.21.6

192428

222831

26.532.237.9

55.064.470.1

41.747.451.2

B0.81.21.6

273338

242933

36.043.651.2

60.770.175.8

45.551.256.9


nozzle ∆p

"H2OVP[cfm]

LA18[dB(A)]




Y0.81.21.6

273338

273235

36.043.651.2

76.7111.8121.3

72.083.491.0

A0.81.21.6

394855

293438

53.164.473.9

108.0125.1138.4

81.594.8102.4

B0.81.21.6

546676

333842

72.089.1102.4

121.3138.4149.7

91.0104.2111.8

QEc = 1,058 BTU/hpw at woc = 5.4 feet with 0.75 gpmpw at woh = 3.0 feet with 0.75 gpm


nozzle ∆p

"H2OVP[cfm]

LA18[dB(A)]




Y0.81.21.6

162124

222831

22.728.432.2

60.772.077.7

45.553.158.8

A0.81.21.6

253035

242933

34.139.847.4

70.181.589.1

53.160.766.3

B0.81.21.6

344148

263235

45.555.064.4

77.789.196.7

58.866.372.0


Legend

∆p - static pressure at the primary air socketVP - primary air flow rate (± 10 %)LA18 - sound power level at 18 m² SabineQP - cool. capacity of primary air (fresh air) (± 5 %)

(therm. room load T = 0,8)Qc - cooling capacity, secondary air (heat exch.)

(± 5 %)Qh - heating capacity, secondary air (± 5 %)QEc - heating capacity with natural conv. t = 90 Fwoc - standard water flow rate at cooling capacitywoh - standard water flow rate at heating capacity∆t - temperature difference between




LTG Incorporated



Water-side pressure loss and cooling capacity with different water flow ratesInduction units type HFG with bypass, HFG-0 (2-pipe system), HFL, HFH – 6-tube cooler

0.125 0.25 0.5 0.75 1 1.5

0.33

0.66

1

1.65

3.30

6.60

10

20 40 60 80 100 12040

60

80

100

120

Water flow rate in % of the standard water flow rateWater flow rate w [gpm]

Water-sidepressureloss

∆pw[ftH2O]

Coolingcapacityin[%]ofthenominalcapacityQc

2

Size 500Size 630Size 800Size 1000Size 1250

Water-side pressure loss and heating capacity with different water flow ratesInduction units type HFG with bypass, HFG-0 (2-pipe system), HFL, HFH – 6-tube heater

0.125 0.25 0.5 0.750.16

0.33

0.66

1.65

3.30

4.95

40 60 80 100 12040

60

80

100

120



∆pw[ftH2O]

Heatingcapacityin[%]ofthenominalcapacityQh


1.32

1

Note: The minimum water flow rate must not be lower than 20% of the standard flow rate for cooling, and 40% for heating,considering the water-side pressure compensation.


LTG Incorporated



Water-side pressure loss and cooling capacity with different water flow ratesType HFK-0 – 4-tube cooler


∆pw[ftH2O]

Water flow rate w [gpm]

0.25 0.5 0.75

3.30

0.33

size 1250

size 1000

size 800

size 630

Water-side pressure loss and heating capacity with different water flow ratesType HFL, HFH – 4-tube heater

0.125 0.25 0.5 0.750.06

0.1

0.16

0.33

0.66

1

1.32

40 60 80 100 12040

60

80

100

120

Water flow rate w [gpm] Water flow rate in%of the standardwater flow rate



∆pw[ftH2O]

size 500size 630size 800size 1000size 1250



LTG Incorporated


KlimaventR induction units for perimeter installationType HFG-0 (4-tube system), HFS, QHGWater-side pressure loss and cooling capacity with different water flow rates

0.25 0.375 0.5 0.75

0.33

0.66

1.65

3.30

6.60

20 40 60 80 100 120 14040

60

80

100

120



pw[ftH2O]



Water-side pressure loss and heating capacity with different water flow rates

0.16

0.33

0.66

1.65

3.30

20 40 60 80 100 12040

60

80

100

1204.95

Water flow rate w [gpm] Water flow rate in % of the standard water flow rate



∆pw[ftH2O]


0.25 0.375 0.5 0.75



LTG Incorporated



Water-side pressure loss and cooling capacity with different water flow ratesType HFK-0, 4-pipe system


Water flow rate in % of the standard water flow rate

Water-side pressure loss and heating capacity with different water flow ratesType HFK-0, 4-pipe system


Water flow rate in % of the standard water flow rate



LTG Incorporated


Induction units for perimeter installationSelection exampleSet valuesFor this selection example the following unit was selected:- type/size HFL 800 (see pages 16/17)- primary air volume VP 38 cfm- static pressure at the primary air socket Δp 1”H2O

Performance dataFor the induction unit type HFL 800, the following values result from the table on page 17:- sound power level LwA 33 dB(A)- specific cooling capacity of primary air QP/tP 41.7 BTU/h*∆t- specific cooling capacity of secondary air Qc/t 91 BTU/h*∆twith a standard water flow rate of 300 kg/h

- specific heating capacity of secondary air Qh/t 64.4 BTU/h*∆twith a standard water flow rate of 95 kg/h

- natural convection QEc 1,187 BTU/h

CoolingSet values:- room temperature in summer / suction airtemperature before entering the heat exchanger(values may vary) tR/tA 79 F

- temperature of primary air tP 61 F ΔtP tR - tP = 79 F - 61 F = 18 F

- temperature of cooling water system tKWV 63 F Δt tA - tKWV = 79 F - 63 F = 16 F

- wanted cooling capacity Qc wanted 2,050 BTU/h

resulting in:- primary cooling capacity QP 41.7 BTU/h*∆t 18 F = 750 BTU/h- required secondary cooling capacity (Qk wanted - QP) Qc req 2,050 BTU/h - 750 BTU/h = 1,300 BTU/h- potential secondary cooling capacity Qc 91 BTU/h*∆t 16 F = 1,456 BTU/h- reduction of the capacity is necessary 1,300 BTU/h / 1456 BTU/h = 89 %- (see diagram on page 23) 67 % of the standard water flow rate 1.32 gpm 0.67 = 0.88 gpm- cooling water return temperature tKWR 65.5 Fcalculated from: Q = mcΔttKWR = Qk erf.SK / (mc) + tKWV = 380/ (2011,16) + 17 [K]

- water-side pressure loss (see diagram on page 32) ΔpW 3.35 feet

HeatingSet values:

- room temperature in winter / suction airtemperature before entering the heat exchanger(values may vary) tR/tA 71.5 F

- temperature of primary air tP 61 F ΔtP tR - tP = 71.5 F - 61 F = 10.5 F

- temperature of heating water system tHWV 158 F Δt tHWV - tR = 158 F - 71.5 F = 86.5 F

- wanted heating capacity Qh wanted 4,100 BTU/h

resulting in:- primary capacity QP 41.7 BTU/h*∆t 10.5 F = 438 BTU/h- required secondary heating cap. (Qh wanted + QP) Qh req 4,100 BTU/h + 438 BTU/h = 4,538 BTU/h- potential secondary heating capacity Qh 64.4 BTU/h*∆t 86.5 F = 5,570 BTU/h- reduction of the standard capacity is necessary 4,538 BTU/h / 5,570 BTU/h = 80 %- (see diagram on page 33) 60 % of the standard water flow rate 0.42 gpm 0.6 = 0.25 gpm- heating water return temperature tHWR 122 Fresulting from: Q = mcΔttHWR = tHWV - [Qh erf / (mc)] =70 - [1332 / (571,16)] [K]

- water-side pressure loss (see diagram on page 33) ΔpW 0.2 feet


LTG Incorporated



Connection of unitsThe following table states possible arrangements for the a/c units presented in our literature:

Arrange-ment

Waterconnection

Primary airconnection

Damperactuator

fluteactuator

Type

III

RL

RL

LR

--

HFG*)**), HFH, HFK, HFL*), HFS, QHG

III R L L - HFG, HFH, HFK, HFL, HFS, QHG

IV L R R - HFG, HFH, HFK, HFL, HFS, QHG

VVIVIIVIII

RLRL

RLLR

RLRL

----

HFG, HFK, QHG

Legend:

L = leftR = rightDirection of view: view is always from the room towards the sill with the unit installed.

*) Connection of primary air from below in the center (special version) only possible for HFG, HFL.**) HFG with bypass: no lateral wall suspension possible.

Actuators for damper-controlled units

The following damper actuators are available for damper-controlled LTG induction units:

HF.-B: Belimo actuator: 0 - 10 V, continuous

HF.-L: Siemens, Landis & Stäfa: 0 - 10 V, continuous; 3-point

HF.-P: LTG pneumatic actuator: 0.2 - 1.0 bar


LTG Incorporated



Damper actuators for LTG A/C units:

The following actuators are available for damper-controlled LTG induction units:

No. Actuator typeProductname

Productdescription

Method of controlOperatingvoltage

1 pneumatic LTG SMA hoisting motor3 - 14.5 psi

(on request 8.5 - 14.5 psi)

2 electric Belimo LH 24 SR hoisting motor DC 2 - 10 V, continuous AC 24 V

3 electric Belimo LM 24 SR rotating motor DC 2 - 10 V, continuous AC 24 V

4 electric Landis & Gyr GDB 131.2E hoisting motor 3-point AC 24 V

5 electric Landis & Gyr GDB 131.1E rotating motor 3-point AC 24 V

6 electric Landis & Gyr GDB 161.2E hoisting motor DC 0 - 10 V, continuous AC 24 V

7 electric Landis & Gyr GDB 161.1E rotating motor DC 0 - 10 V, continuous AC 24 V

Control:

Unit types Possible actuators(see above)

Full heating load Neutral Bypass Full cooling load

HFL, HFH 12.64.5

3 psi2 V (0 V)3-point

7 - 9 psi5 - 6 V3-point

14.5 psi10 V3-point

HFG***Heating

Cooling

13.75


14.5 psi10 V3-point


* For design reasons, primary air connection and damper actuator cannot be on the same side of the unit.If the pneumatic/electric actuator is fully triggered (14.5 psi or 10 V), the unit will operate in cooling modeonly with the primary air flow (second nozzle row open, heat exchanger and bypass closed).

** Dampers and flute are driven by separate motors being installed on alternate sides of the unit. If the flute drive is fullytriggered, the second nozzle row is open (full load cooling).

*** Floor mounted units: With the smallest control signal the heat exchanger is completely open with possibility for maximumcooling or heating load (bypass at > 3 psi or > 0 V signal).

1.Dient zur Identifizierung der letzten S


LTG Incorporated

Induction sill - USA - TP (08/11) 416-131E LTG Incorporated • Former editions are invalid • Subject to technical modifications

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Technical Brochure LTG Air-Water Systems€¦ · Technical Brochure LTG Air-Water Systems The Innovation Company LTG Incorporated Induction units ... Damper control (air-side control)