PRODUCT BROCHURE. Linear Multistream Ceiling Diffuser LMC-AD LMC-AD : smartemp.com

Transcription

1 PRODUCT BROCHURE Linear Multistream Ceiling Diffuser LMC-AD LMC-AD : 07 smartemp.com

2 DESCRIPTION The SMARTEMP Linear Multistream Ceiling Diffuser, type LMC-AD (figure ), is a multi-nozzle linear slot diffuser with adjustable discharge direction that can be flush mounted in a ceiling or freely suspended (ie no Coanda attachment to the ceiling required). The diffuser's -to- linear slots house a plurality of barrel nozzles, each with an adjustable guide vane, delivering highly inductive discharge by breaking the supply air stream up into a multitude of alternating air jets. Each barrel nozzle is made of black polycarbonate located between linear aluminium extrusions that are anodised or powder coated. Each guide vane is readily adjustable to any one of five discharge patterns (figure - three -way blow examples shown) to change the discharge angle from horizontal through diagonal to vertical (figures & ). Two-way discharge is standard (figures & ); one-way discharge is available as an option (figure ). Intense mixing at the diffuser discharge face produces high induction that strongly dilutes the supply air stream with large quantities of room air. Rapid temperature equalisation of the supply air stream with room air occurs, preventing cold air dumping, thereby ensuring uniform temperature distribution (no cold and draughty or hot and stagnant spots) and high comfort levels in the space. Heating performance is also improved. The stable discharge characteristics of the diffuser over a wide range of supply air temperatures and volume flow rates make the LMC-AD suitable both for constant flow and VAV systems, including low temperature air supply. LMC-AD Slots V [L/s/m] T = - K Volume flow rate* V [L/s/m] T = - K V [L/s/m] T = -8 K *Max V based on Pa Pt max (including side-entry connection box). Linear Multistream Ceiling Diffuser LMC-AD : 07

3 Figure Figure DISCHARGE DIRECTION EXAMPLES WITH -WAY PATTERN Figure Direction A Direction C Direction E Figure Figure CONSTRUCTION - Plenum Box - Supply Air Diffuser - Return Air Diffuser - Expansion Bracket - Joining Strip - Corner piece 7 - End Flange 7 Figure Linear Multistream Ceiling Diffuser LMC-AD : 07

4 TECHNICAL DATA B INSTALLATION WITH EXPANSION BRACKET INSTALLATION WITH CONNECTION BOX D A 0 Wt 0 Wn Wt Wn Wt Wn Wt Wf Wf Wf n = n = n = DIMENSIONS Number of Slots (n) Width flangeless face Wn [mm] Width flanged face Wf [mm] Width of diffuser throat Wt [mm] Recommended internal plenum height A [mm]* Recommended internal plenum width B [mm]* Recommended spigot dimension D [mm]* up to 00 mm length Recommended spigot dimension D [mm]* up to 00 mm length D n 8 n+ 8 n+0 8 n- Wn+0 <.m/s <.m/s *Check with local supplier. All clear air dimensions. If insulated, then external dimensions need to be increased accordingly. Standard neck lengths: 00, 00, 0, 00 mm. Other lengths on request. Neck length (including screw heads) increases by.0 mm per end flange. Products supplied may differ slightly from those described in this technical brochure due to on-going product development. Linear Multistream Ceiling Diffuser LMC-AD : 07

5 NOTES TO NOMOGRAM ON PAGE Comments / Nomogram valid for: Adjustments: Heating valid for 00% high-level return. For low-level return: Tmax.heating ( + (LRA%)/00) Tmax, where LRA% = % low-level return. Valid for discharge from closed ceiling. For freely suspended diffuser: Heating Tmax.freely suspended Tmax.heating /. Recommended Air Pattern Settings: For H = to m: A: 0 to -0 discharge to the horizontal. 0 to -0 For H = to m: B: 0 to -0 discharge to the horizontal. For H = to m: C: -0 discharge to the horizontal. 0 to -0 Total pressure (Pt) is inclusive of side-entry connection box pressure loss. -0 Draw a line vertically down the nomogram for -way blow, or correct for -way blow. For height.7 m select.7; otherwise select height twice (once in the grey zone; once in the white zone). Cmin is either the minimum spacing between two -way blow diffuser rows (halve this value for throw to walls / glazing) or the minimum throw of a -way blow diffuser row. 7 Cmax is either the maximum spacing between two -way blow diffuser rows (halve this value for throw to walls / glazing) or the maximum throw of a - way blow diffuser row. Active Length Ratio (RLA) is the ratio of the active length LA relative to the room length L. Determine Cmax twice (once for cooling T; once for discharge height) then select the lower of the two outputs. 8 Select desired comfort level to determine minimum and maximum spacing or throw (Cmin & Cmax) and minimum discharge height (Hmin). Hmin for discharge from closed ceiling. For freely suspended diffuser: Hmin.freely suspended Hmin. 9 Sound pressure level LP [NC/m] is valid in a standard commercial office only with.7 m to m ceiling. Thermal Comfort Guide: ADPI 9%: Premium comfort sedentary activity, such as in auditoria. ADPI 90%: High comfort near-sedentary activity, such as in board rooms, high end offices and libraries. ADPI 80%: Good comfort near-sedentary activity, such as in open-plan offices and meeting rooms. ADPI 70%: Standard comfort medium activity, such as in transient spaces, retail and lobbies. Linear Multistream Ceiling Diffuser LMC-AD : 07

6 Layout Recommendations: Refer to nomograms for performance data. Notes: Spacing: Cmin C Cmax Cwalls = C/ Active Length Ratio: RLA = LA / L, where LA 0. L, and LA = Σ LA.i Air Pattern: -w: -way blow -w: -way blow C/8 LA. L C/ LA. C/8 C/8 LA. L C/ LA. C/8 -w -w C/ C C/ -w -w -w -w C -w -w Linear Multistream Ceiling Diffuser LMC-AD : 07

7 LMC-AD m /h/m Heating Tmax [K] L/s/m Slots 0 L/s/m H = m +0 K Air Direction : +8 K A.7 m + K + K m + K +0 K B +8 K + K m + K C + K m + 0 K ADPI 9%; ṽ 0.0 m/s: ADPI 90%; ṽ 0. m/s; DR T= C: Pt Total Pressure, Pt [Pa] 0 [Pa] Cooling Air Pattern (-way/-way) 9 Sound Power, LW [db(a)/m] Sound Pressure, LP [NC/m]* LW 0 0 [db(a)/m] 0 LP* 9 [NC/m] Cooling T = -8 K - K RLA = H = m H [m] = - K - K Cmin [m] Hmin [m] Cmax [m] w -w 0 - K -8 K Cooling T [K] ADPI 80%; ṽ 0.9 m/s: * ADPI 70%; ṽ 0. m/s; DR T= C: Notes: Based on 0 db room absorption. Air Direction: A 0 to -0 ; B 0 to -0 ; C REFER TO NOTES ON PAGE Linear Multistream Ceiling Diffuser LMC-AD : 07

8 EXAMPLE: LMC-AD-. Determine performance parameters for a row of LMC-AD-. (two-slot; one-way blow) operating at 7 L/s, freely suspended at m height, supplying approximately L/s/m to a library. The sum of the diffuser lengths spans 0% of the library length. The supply-to-room temperature differential when cooling is - K. 00% return air is from a low level. Select a double slot (Slots ). m discharge height requires the diffuser air pattern to be set to C ( -0 from the horizontal). Select L/s/m specific airflow, which gives a maximum heating temperature differential ( Tmax) of + K, valid for discharge from a closed ceiling and 00% high-level return. For 00% low-level return, Tmax.heating ( + (LRA%)/00) x Tmax ( + (00/00)) K + K. As the diffuser is freely-suspended, Tmax.freely suspended Tmax.heating /. +.7 K. (This is not sufficient for heating. Consider using the Smartemp HSC-AD if heating is required.) The total pressure (Pt) is 7 Pa, inclusive of side-entry connection box pressure loss. To determine layout recommendations in cooling mode, select -w (one-way blow) air pattern. Select m discharge height twice (once in the grey zone; once in the white zone). Select - K cooling. 7 Select RLA = 0. (ie 0% active length ratio for 0% diffuser span across the library length). Select - K cooling and m discharge height. 8 For a library, select ADPI = 90%. Cmin between two diffuser rows is m ( m to walls). Hmin freely suspended Hmin....9 m. Cmax between two diffuser rows is m (ie the lower of m for - K cooling and 0 m for m discharge height) or 7. m to walls. 9 The A-weighted sound power level (LW) of the diffuser is db(a). As this is a large volume library (and not a.7 to m ceiling height office) the sound pressure level (LP) should not be used (ie only LW should be used for acoustical calculations). Linear Multistream Ceiling Diffuser 7 LMC-AD : 07

9 ORDER DETAILS LMC-AD- -. -S -E ACCESSORIES: - 0* - Diffuser only. - Kt - With uninsulated connection box clipped to diffuser throat. - Kn - With uninsulated connection box screwed to into diffuser neck. - KIt - With internally insulated connection box clipped to diffuser throat. - KIn - With internally insulated connection box screwed into diffuser neck. LMC-AD : 07 PROFILE COLOUR: - RAL900* (signal white). - RAL900 (matte black). - RAL (RAL colour of choice). FIXING : - 0* - Without accessories / by others. - EX - Expansion bracket. DIFFUSER ENDS: Without end flanges. - J - Without end flanges + pair of joining strips. - - End flange + pair of joining strips. - * - End flanges. SIDE PROFILE: - F* - With side flanges. - N - Flangeless. AIR PATTERN & DIRECTION: - A* - -way horizontal, position A (0 to -0 ). - A - -way horizontal, position A (0 to -0 ). - B - -way horizontal, position B (0 to -0 ). - B - -way horizontal, position B (0 to -0 ). - C - -way diagonal, position C ( -0 ). - C - -way diagonal, position C ( -0 ). - D - -way vertical, position D (broad, short). - D - -way vertical, position D (broad, short). - E - -way vertical, position E (narrow, long). - E - -way vertical, position E (narrow, long). NUMBER OF SLOTS: -,,,,,. - Other slots available on request. NOMINAL LENGTH: - N00 - neck length = 00 mm. - F9* - face length = 9 mm. - F - custom face length 00 mm. MODEL: - Linear Multistream Ceiling - Adjustable Direction. Note: * Standard, if no type code entered Products supplied may differ slightly from those described in this technical brochure due to on-going product development. Linear Multistream Ceiling Diffuser 8

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