welcome to field controls: hrv / erv training duct systems part 3
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Welcome to Field Controls: HRV / ERV Training Duct Systems Part 3. Sign In Information Sheets Make sure you have completed all sign in sheets Please print legibly and double check your information Make sure to include your identification numbers - PowerPoint PPT PresentationTRANSCRIPT
Welcome to Field Controls:Welcome to Field Controls:
HRV / ERV TrainingHRV / ERV Training
Duct SystemsDuct Systems
Part 3Part 3
Sign In Information SheetsSign In Information Sheets
• Make sure you have completed all sign in sheets
• Please print legibly and double check your information
• Make sure to include your identification numbers
• Complete information is necessary for CEHs and recognition
• NATE Credit requires a specific sign in sheet
IntroductionIntroduction HRV – ERV Duct Systems
A. Simplified System
B. Partially Dedicated System
C. Fully Dedicated System
D. Design Tips
E. Installation Considerations
F. Test
G. Review and Comments
Turn to the “Simplified Installation” page 14 in the Instruction Manual
Simplified SystemSimplified System
Fresh Air to Inside
Stale Air from InsideStale Air to
Outside
Fresh Air from Outside
Simplified InstallationSimplified Installation Return / Return Method
HVACEquipment
Ventilation System must be electrically interlocked with HVAC Equipment Fan
Return Air Duct
Simplified InstallationSimplified Installation
Simplified InstallationSimplified Installation
HVAC Equipment
Note: New construction seal all metal ducts with mastic for Energy star 3.0 pressurized duct test
Page 15
Partially Dedicated SystemPartially Dedicated System
Fresh Air to Inside
Stale Air from Inside
Stale Air to Outside
Fresh Air from
Outside
Partially Dedicated SystemPartially Dedicated System
Return Air
HVACEquipment
Page 15
Partially Dedicated InstallationPartially Dedicated Installation
Page 15
New Construction: Energy Star 3.0 requires the duct system to be pressure tested
Partially Dedicated InstallationPartially Dedicated Installation
HVAC Equipment
Note: Seal all metal ducts with mastic to pass a pressurized duct test according to Energy Star 3.0
Page 16
Fully Dedicated SystemFully Dedicated System
Stale Air Exhaust
Fresh Air to Inside
Fresh Air Intake
Stale Air from Inside
Fully Dedicated InstallationFully Dedicated Installation
Fully Dedicated InstallationFully Dedicated Installation
Fully Dedicated InstallationFully Dedicated Installation
Design Drawing TipsDesign Drawing Tips
• Include all branches and connections
Design tips:Design tips:o Minimize duct lengths o Minimize bends o Use 45° elbows instead of 90° o Use “Y” s instead of a Teeso Join the unit and duct system with
non-metallic insulated duct 12 inches in length (noise / vibration)
4 - 4 - Installation Installation
ConsiderationConsiderationss• Fresh air intake and
stale air exhaust locations
• Condensate drainage
• Space is conditioned Not below 60°F Not above 100°F
• Access for service Maintenance / Cleaning
Ducts:Ducts:
• Keep duct runs short
• Minimize 90° elbows
• 45° elbows preferred
• Y’s instead of tees
• Rigid duct recommended
• Energy Star homes use mastic to seal duct joints
Duct Systems TestDuct Systems Test
1. Flex duct must be stretched tightly and supported properly with
appropriate hangers.
True or False
2. Metal duct seams should be sealed with mastic to pass a Energy star 3.0 pressurized duct leakage test?
True or False
3. When installing a HRV or ERV in conjunction with an existing forced air HVAC system you will use:
A. Partially Dedicated Installation Method B. Simplified Installation Method C. Fully Dedicated Installation Method D. Partially Dedicated or Simplified Installation MethodE. None of the above
4. When installing an HRV or ERV without a ducted forced air system you will use:
A. Partially Dedicated Installation Method B. Simplified Installation Method C. Fully Dedicated Installation Method D. Partially Dedicated or Simplified Installation MethodE. None of the above.
5. Simplified Installation: stale air is exhausted from the return air of the ducted HVAC equipment and an equal amount of fresh air is replaced back into the return air.
True or False
6. Another name for a Simplified Installation
A. The Supply Return MethodB. The Return / Supply MethodC. A Partially Dedicated SystemD. The Return / Return MethodE. None of the above
7. A Simplified Installation does not require the furnace blower to run continuously or be electrically interlocked with the HRV or ERV.
True or False
8. Partially Dedicated System: stale air is exhausted from specific locations (bathroom, kitchen etc) and an equal amount of fresh air is replaced back into the HVAC system return air.
True or False
9. Install a backdraft damper on:
A. Partially Dedicated Installation B. Simplified Installation C. Fully Dedicated Installation D. Partially Dedicated and Simplified Installation E. None of the above.
10. A Fully Dedicated System is normally installed in homes without a ducted forced air system.
True or False
11. On a Fully Dedicated Installation the supply ducts deliver fresh air to bathrooms, kitchen, laundry room, etc.
True or False
12. Resistance to air flow is called External Static Pressure (e.s.p.)
True or False
13. General installation considerations are
A. Fresh air intake and stale air exhaust locationsB. Condensate drainageC. Install unit in the conditioned spaceD. Provide access for service and maintenanceE. All the aboveF. None of the above
14. Energy Star Homes
A. Seal duct joints and fittings with foil tapeB. Seal duct joints and fittings with duct tapeC. Seal duct joints and fittings using screws or rivetsD. Seal all duct joints with mastic E. All the aboveF. None of the above
15. Energy Star Homes
A. A recognized label for energy efficient homesB. Require ventilation according to ASHRAE 62.2C. Require a pressurized duct leakage testD. Require manual J load calculations E. All the aboveF. None of the above
QuestionsQuestions