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System Sizing. Proper System Design. Load Calculation Equipment Selection Duct Layout Branch runs Terminations Start ups Customer checks. The Next Step. Room By Room Load Calculation. Kwik-Way. www.spacepak.com Contractor assistance. Load Calculation.

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Presentation Transcript
proper system design
Proper System Design
  • Load Calculation
  • Equipment Selection
  • Duct Layout
  • Branch runs
  • Terminations
  • Start ups
  • Customer checks
the next step
The Next Step
  • Room By Room Load Calculation

Kwik-Way

www.spacepak.com

Contractor assistance

load calculation
Load Calculation
  • Essential for a properly performing job
  • Shortcuts are not encouraged
  • BTUs not CFM!!!
  • Loads give you net values
  • Equipment discussed in nominal values
load exceptions
Load Exceptions
  • Sensible vs Latent
    • Don’t add 1/3rd for latent
  • Sunrooms
    • Where does it face?
  • Commercial applications
    • Exceptional heat sources?
load calculation1
Load Calculation
  • ACCA Manual J
    • Industry Standard
    • Currently revision 8
    • Not for commercial loads
    • Cautions in rooms with large glass areas
      • Use peak function for large glass areas
    • www.acca.org
kwik way
Kwik Way
  • Runs from Internet
    • www.spacepak.com and then contractor assistance
    • http://www.spacepak.com/html/hvac_contractor_installation.htm
  • Quick program
  • Free
  • Does not keep files, must print out

Skip to

Equipment Selection

slide17

This was done off internet….

  • www.spacepak.com
  • Room by room analysis.
  • Totals load and suggests model and size.
  • Nice presentation tool.
  • Want a CD? Ask you salesmen….
slide18

ALTITUDE CORRECTION

Step One

  • determine atmospheric pressure at given altitude

5.2561

Altitude Pressure = 14.696x(1-6.87535E-06xA)

Where: A = altitude in feet

slide19

529.67xaxb

Corrected CFM =

14.696x(c+459.67)

ALTITUDE CORRECTION

Step Two

  • Correct CFM for Altitude

Where: a=pressure at altitude, b=specific CFM, c=entering air temperature

equipment selection
Equipment Selection
  • Check systems capacity chart
  • Match to the load calculation
  • Data on internet
    • www.ariprimenet.org
    • Use mix match systems
ari listing edited
ARI Listing (edited)

Model # SpacePak # Mfr SEER Matched capacity AEU

AC024X1222 345719 ESP-2430V+TDRLUXAIRE, 11.10 * 22600 * $171*

AC024X1222 345540 ESP-2430D+TDRLUXAIRE, 10.90 * 22200 * $171*

system design
System Design

Let’s do a house!

my mother in law s house
My Mother-In-Law’s house
  • 80’s Ranch.
  • On a slab
  • Attic space available
  • Windows are double pane, low “e”
  • Walls are R13
  • Ceilings are 8’ R19
  • Heated with boiler and baseboard (cooling only)
  • 70 by 38 ft.
slide25

This was done on internet….

  • www.spacepak.com
  • Room by room analysis.
  • Totals load and suggests model and size.
  • Nice presentation tool.
  • Want a CD? Ask your salesmen….
where do i fit the equipment in
Where do I fit the Equipment in ?
  • Look for a central return grill spot
  • Horizontal or Vertical Unit
  • Spacepak in the attic or basement
  • Reaching the other floors w/ 2”
  • “I want the condenser behind the garage”
  • Commercial and multi-zone systems
where to place the return
Where to Place the Return?

Central Location – Out of Direct Living Area

air handler location
Air Handler Location
  • Return Air Duct Dictates Unit Location
    • Best Location for Return Air Grill
    • Split Return Air?
  • Unit Location Dictates Trunk Layout
    • Best Option for Trunk Layout?
  • Outlet Location: Dictates Trunk Run
    • How Many Outlets, Where do they go?
outlet location

ESP-3642

Outlet Location

5190

606

3806

2748

4706

9910

2385

5935

slide31
Restrictors and Balancing:

Each 2”run will provide between 1700-2000 btu at a run length of 10’-20’

3 restrictor sizes

15%, 30% and 50%

Living room = 3 full runs

Family room = 5 full runs

How about the Dining room?

Needs two outlets but gain is only 2800 btu.

Use 2 30% restrictors on both runs. = 2800 btu

Runs must total 19 full open for 3642D – 850 CFM to get ESP to 1” and 1.5” W.C.

outlet location1

5190

606

>

<

3806

2748

ESP-3642

4706

9910

2385

5935

Outlet Location
high static plenum
High Static Plenum

Will this pull

on fitting?

Short

runs

Long runs

considerations
Considerations:
  • Want to keep runs as close as possible to 10 feet in length. Full 40 cfm and 2000 btu per outlet makes it much easier to balance…..
  • Generally less $$$ to run supply plenum extra distance than run long 2” runs.
  • Want to “premake” the 2” runs downstairs where it’s nice and cool!!!!
slide35

Suggested

Layouts

plenum connection

5190

606

>

<

3806

2748

ESP-3642

4706

9910

2385

5935

Plenum Connection
estimating the job
Estimating The Job
  • Good measurements can make you money
  • Old homes are gold but full of surprises
  • Refer to Spacepak’s Typical equipment list
  • Two sizes fit all
  • Spacepak is a premium product
  • Selling the extras
slide38

Airflow Considerations

  • Spacepak min. required outlets 14, 19, 26
  • Split or extended return duct
  • Filters
  • New air handler, old system
we never undersize
Conventional systems undersize for humidity removal

Difficult to keep up on 100° days

Space Pak’s 6 row coil

Humidity control built in

Size for the worst day

We Never Undersize
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