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• Ivonn Ochoa

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BASIC TRAINING WORKBOOK Module 4 Hydraulics

Copyright 2013 M.E.P.CAD, Inc. This work is the sole property of M.E.P. CAD, Inc. and may not be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of the copyright owner.

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BASIC HYDRAULIC CALCULATIONS: 1. CHECK THE GENERAL SPACING FOR THE GRID SYSTEM: SELECT A PIECE OF TYPICAL

GRID BRANCH LINE PIPE. ‘Status Line’ will show: Ø 1½” │ Length: 9’-11.5 (the size and length may differ on your plan). 2. CLICK ‘POINT-TO-POINT DIMENSION’

AND CHECK THE BRANCH LINE SPACING ANYWHERE BETWEEN COLUMN LINE 3 AND 5. LINE SPACING SHOULD BE 11’-5.

3. Settings \Default Properties \Remote Area \Standard **: (TO PRESET DEFAULTS) ** Lite Users: Skip ahead to Step 10. Remote Area Boundary is used in a similar fashion, except the minimum number of heads to flow on each line must be calculated manually. The remote area must also be drawn by clicking several points around the heads you wish to flow.

Optional. Suffix is added to the Job Number on standard reports.

Only used on NFPA reports.

The spacing set here establishes the actual Sprinkler Coverage Area when determining the Minimum Sprinkler Discharge. This needs to be changed to match the spacing for the system.

You also have the option of showing a crosshatch within the area described. The crosshatch is controlled on the Crosshatch Tab).

4. On the ‘General’ tab, create a new Layer called “Remote Area” and change:

5. Snap the Benchmark [F2] to the center/midpoint of the Grid pipe, on the

lowest branch line (near Col 5), between the 2nd and 3rd sprinkler from the secondary cross main. Drag the Benchmark Perpendicular ⊥ to the inside face-of-wall. Page 1

6. Click the ‘Remote Area’ button

. Notice that the Remote Area is calculating as it is moved around the drawing. Snap the Area to the Benchmark.

7. Left-Click once to place an Area and then Right-Click to exit the command.

If the Remote Area is oriented vertically, make sure ‘Angle of Remote Area’ within the Properties is set to “0”, as in Step 3 above. 8. Select the Remote Area, Zoom All

and click the ‘AutoPeak’ button

,

and then click to have the program find the most demanding location along the branch lines where the Area is located. During ‘AutoPeak’, the riser nipples are ignored. The outriggers beyond the cross mains are also checked. 9. Copy this Remote Area to the Tree area of the system:

LEFT-CLICK & Drag the Area, (start dragging 1st and then) press & hold [CTRL] (to copy), and snap to the inside face-of-wall in the lower-left corner of the building near Col J-5. 10. Within the properties of the Remote Area, edit the sprinkler spacing to

match the spacing of the Tree system: 9’-7. A ‘Standard Remote Area’ boundary (shape) is configured by the sprinkler and line spacing established within its ‘Properties’. It can only be used when these spacing’s are typical. Next, we’re going to place a Remote Area Boundary, used with variable head and line spacing.

11. Click the ‘Remote Area Boundary’ button

then click the ‘Properties’

button:

By using the button, within the ‘Properties’ of the Remote Area, “flowing” sprinklers can be limited to only those above or below the elevation of the Area; or within a 3D cube. Click this and set to ‘Operates sprinklers below…’.

This area is Light Hazard and only requires 100 GPM Hose Allowance. Checking this box will override the Hose Allowance (250) at the source with whatever value is entered here (100).

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rd

12. Choose the 3

Elevation Option and enter 14. Click OK.

13. Draw an area around both office rooms, snapping to the corners of each

room (6 clicks). Right-click to finish.

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Node tags will automatically appear. Note that the upright heads do not have node tags – they are not flowing in this calculation because they are higher than the elevation of the remote area (14’-0”) – using the 3D option described in Step 11 above.

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6 Then Right-click

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14. Double-click the Remote Area and select ‘Node Number Tag Properties’.

Check the box for ‘Show line between node and tag locations’, then Click OK, then OK again.

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The node tags need to be ‘cleaned up’ and moved off of nearby pipes so they can be more legible. Node tags must be moved a certain way so they remain connected to the node reference point.

15. Click on a node tag to select it. Click

and drag the grip at the center of the hexagon and move it clear of the pipe. The grip at the opposite end (the node reference point) will not move.

16. Select the Remote Area boundary.

Check the ‘Status Line’ to verify the size of the Area. The 1st value is the “…Area of Application” established within the Properties of the Remote Area. The 2nd value is the actual Area size. A ‘Remote Area Boundary’ has grips at the corners (and at the midpoints of the boundary lines) that can be dragged to new locations.

17. Click the ‘Update Node Tags’

relevant node tags. 18. Zoom All

Check the current hydraulic dynamics of the system: 19. Select the Grid

Remote Area. Choose HYDRAULIC CALCULATIONS \ANALYSIS REPORTS’ from the menu:

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button to update and redisplay all

Start analyzing the system information: 20. On the ‘PIPES LISTED BY VELOCITY’ tab, filter the list by typing: 16 (as the

“List pipes by…” value). (The value is arbitrary – not that it is excessive, it’s just a starting point.) 21. To locate specific pipes within the drawing that could be causing

excessive pressure losses, click the button to clear the currently selected elements in the drawing (Remote Area and Node Tags), select the pipes of interest from the List

and then click the

button.

This (‘Analysis Reports’) tool works interactively with the drawing. It can be moved to the right a bit so you can better see what is highlighted in the drawing. The impact of changing something in the drawing will instantly be reflected in the calculation results.

22. Go to the ‘NODE ANALYSIS’ tab:

The hydraulically most demanding sprinkler is denoted with an asterisk (*). In the example above, it is Node 201.

23. Go back to the ‘REMOTE AREA DATA’ tab:

The “Coverage Per Head” of 109.41ft² and the “Density” of 0.200gpm/ft² (which resulted in the “Min. Flow…” of 21.88gpm) were established within the Properties of the Remote Area.

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24. With the Hydraulic Analysis dialogue open, click in “white-space” of the

drawing to clear your selection set. 25. SELECT \ EVERY \SPRINKLER \ UPRIGHT 26. Click on the ‘Properties’ button

. On the ‘SPRINKLER’ tab, change the Response to Quick, Temperature Rating to 200°F (This is a warehouse so the temp rating needed to be changed anyway), “Orifice Size” to ½” and, under “Description”, select: ½” orifice, 200° F, Brass:

Notice that the KFactor automatically changes to match the new Orifice size.

27. Click the

button, change the Sprinkler Symbol to include a “Large X” and click OK.

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When you click OK again, notice the new hydraulic results:

The results of any change to the drawing will be shown instantaneously.

28. Close the ‘Analysis Reports’ tool (click the

in the upper-right corner of the dialog box) and clear your selection set in the drawing.

The Grid portion of the system is the largest so it would be best to get this pipe size as small as practical. Whatever is done to the Grid sizing will impact the Tree results but there is plenty of margin to work with.

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29. Select the Grid Remote Area. 30. HYDRAULICS \ANALYSIS REPORTS:

31. Slide the dialog box to the right, keeping the “Pressure Overage” result in

view. 32. Clear your selection set. 33. SELECT \SELECT PIPES WITH FILTER:

Set the filter to:

34. Click OK and Window-Select all of the Grid system piping. 35. Click the

button, change the pipe size to 1¼”: and click OK.

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We could try other changes but for this exercise, this will suffice. 36. Close the ‘Analysis Reports’ tool and clear your selection set.

One final check of the Grid Remote Area:

37. Copy Grid Remote Area to the right: Select the Area, type: 59-10, then

[RIGHT ARROW] button on the keyboard. Hold [CTRL] + press [ENTER]. 38. Double-Click on new Remote Area to open the Properties: Select the

option and click OK. 39. Right-click the remote area and select ‘Autopeak’ 40. Select both Areas (on Grid): 41. HYDRAULICS \KEEP HYDRAULICALLY MOST DEMANDING AREA

The old Remote Area should delete automatically. There are some Grid configurations where the old Area will be most demanding. 42. Click the ‘Save’ button

.

By default, the “Flow State…”, within the Properties of all sprinklers, is set to discharge using the coverage area and density established by each Remote Area:

This works well when the branch lines and the sprinklers being calculated are equally spaced. The Grid Remote Area is an example of this. 43. Select the Grid Remote Area: 44. Click & Hold the ‘Print’ button

, from the fly-out ,

click the ‘Print Hydraulic Reports’ button or: FILE \PRINTING \HYDRAULIC REPORTS.

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Review the ‘Hydraulic Report Options’ and preview the Hydraulic Reports: NOTE: The only fittings that will normally make a difference in the hydraulic results are Grooved 90°s or FireLock™ fittings. Remember to add these before printing the final Reports. Specialty valves (such as Alarm Valves, Backflows, etc.) must be assigned a hydraulic loss within their individual Properties.

AutoPeak should not be used with a tree system.

REMINDER: “Show AutoPeak Results” ”Show actual densities…” and “Show coverage…” options should only be selected when the information is relevant to the system area being reported and when actual sprinkler coverage areas have been properly established.

It is important to note that we have not yet placed any Fittings on the drawing and that we have not yet shown any Pipe Labels. This was done intentionally. Fittings are not needed until you are ready to Stock List and Pipe Labels are not needed until you are ready to Plot. Both simply slow the drawing process down and complicate any changes that might be made. Keep it simple! Don’t put anything on the drawing until it is needed.

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Note that a “Riser Tag” is available from the list of reports. This is only available when there is a ‘Check Point Gauge’ element placed in the drawing and set to “Base of Riser”:

All default AutoSPRINK Riser Details (saved in the “Riser Details” folder within the ‘Parts Tree’) have such a gauge. By default, these gauges are set to “Hidden…” To find the gauge in this drawing: 45. Clear your selection, SELECT \EVERY \CHECK POINT GAUGE and click

Deselect the “Hidden…” option and click OK.

46. ISO View

47. Zoom In

to the Riser.

The ‘Gauge…’ graphic can be relocated by dragging it with the grip (make sure that it doesn’t become detached).

In the Pro and Ultimate Levels: Gauges can be place wherever pressure information is desired. To use: click on the ‘Gauge’ button , from the ‘View’ flyout (or HYDRAULICS \CHECK POINT GAUGE), and snap the gauge to the end point of a pipe.

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.

Remote Area Table: 48. Within the drawing, left click on one of the Remote Area’s boundary to

select it. 49. Go to (Hydraulics \Remote Area Table) 50. Left click the mouse in white-space near the remote area you previously

selected to drop the Remote Area Table in that location.

Supply Table: 51. Within the drawing, right click on the supply. 52. Select ‘Supply Table’ from the pop-up menu 53. Left click the mouse in white-space near the

Supply to drop the Supply Table in that location. (Alternatively you could have selected the Supply with a leftclick of the mouse and then gone to (Hydraulics \Supply Table), and finally, left click in white space to place the Supply Table in that location). In the Pro and Ultimate Levels: a ‘Riser Tag’ is available (HYDRAULICS \RISER TAG) to automatically show “Riser Tag” information for the selected Area on the drawing. When this function is started, the ‘Command Line’ (left-end of the ‘Status Line’) will advise: “Select riser tag node location” (or: at what point in the system do you want the information reported): snap the end point of a pipe. The ‘Command Line’ then advises: “Select a location to place the riser tag table”

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Using an AutoSPRINK file as an Xref for hydraulic calculations: 1. Open drawing UG.cad 2. Press [F2] and place the cursor (looks like a hand) at the top of the lead-in. Left click the mouse to snap the benchmark to the top of the lead-in as shown

(SAVE DRAWING AND CLOSE). 3. Within the ‘Sample.cad’ drawing, zoom to base of riser. (Make a center mouse gesture up and to the left to flip the drawing into isometric view. Roll the mouse wheel to zoom to base of riser, or use a center mouse gesture up and to the right to zoom to base of riser) 4. Right click on the supply and select ‘Delete.’ 5. Go to Tools \Xref. (‘Insert External Reference’ window will pop-up) 6. Select the ‘UG.cad’ drawing. 7. Check: ‘Use benchmark location in external drawing…’

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8. Click OK. (once you have clicked OK you will see the UG.cad drawing and a cursor (looks like a pen) located where the benchmark was placed (top of lead-in). 9. Hover over base of riser and left click the mouse to snap the xref to that location.

The Xref is a symbol and can now be placed on a layer. 10. In the Parts Tree left click on the Add Layer icon 11. Type “Xref” in the Layer Properties pop-up. 12. Click OK

Save the drawing.

End of Module 4

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