Author Topic: Help needed on HVAC Notes.  (Read 5559 times)

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CAB

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Help needed on HVAC Notes.
« on: May 16, 2008, 12:10:00 PM »
Not sure if this is the correct forum.
I usually have nothing to do with the mechanical sheet but this home is the exception.
The contractor asked that I provide a HVAC sheet. I put together some notes below.

Are there any glaring errors or omissions that I need to address.

Thanks for your comments. (out to lunch, will check back this afternoon)

Code: [Select]
                        GENERAL NOTES
1. Install all systems in compliance with local, state, and national codes   
           
2. Air conditioning equipment specified on this sheet is for bid purposes only. Final
selection of equipment shall be made by the builder/owner. The cooling SEER rating
will be greater than 14 and the heating rating will be greater than 8.5.  Substitutions
of items called out by manufacture and/ or model shall require the approval of the
General Contractor in writing.         

3. Equipment and duct system shall be sized according to the "Energy Wise Heating &
Cooling Equipment Load Estimate" and the "Energy Wise Duct Design".

4. The HVAC diffuser layout shown in these plans is for design purposes only and is a suggested
layout only to avoid conflict with lighting. See electrical plan for location with relation to lighting.
Contractor to field verify all duct work sizing and routing with building contractor prior to fabrication

5. Ductwork:
All ductwork shall conform to SMACNA HVAC duct construction standards, metal and flexible, latest edition.
a. Flex duct R8 Flexible Foil Mylar lined duct hung at 4 centers
b. Duct Board shall be foil backed fiberglass R-6
b. All joints shall be taped with UL181 duct tape.

6. Grilles and Registers:
a. All registers shall be Hart & Cooley or equivalent; style and size as indicated
b. Supply diffusers and return air filter grilles to be painted white metal.

7. Piping:
a. Refrigerant piping is type L copper sized properly for distance.
b. Primary condensate drain piping is to be 3/4" PVC plastic pipe to drain hub per code
c. All auxiliary drain piping to be 3/4" plastic

8. Thermostats programmable

9. Vent all bathrooms and the utility room to the exterior using fans to be provided by the electrician
and vented by the HVAC contractor.

10. All fresh air intake openings must be located a minimum of 15'-0" away from all exhaust, plumbing
vents. 

11. Mechanical contractor to install refrigerant lines in accordance to manufacturer's 
data and to provide outdoor unit concrete pads. 
                                     
12. Provide vibration isolators and condensate pan with drain for AHU     
             
13. HVAC Contractor to coordinate and verify all unit specifications and electrical   
requirements prior to purchase of equipment and installation   

14. Warranty Equipment per manufacturer
« Last Edit: May 16, 2008, 02:48:03 PM by CAB »
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mjfarrell

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Re: Help needed on HVAC Notes.
« Reply #1 on: May 16, 2008, 12:11:49 PM »
14. The System must Blow.
Be your Best


Michael Farrell
http://primeservicesglobal.com/

Dommy2Hotty

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Re: Help needed on HVAC Notes.
« Reply #2 on: May 16, 2008, 12:23:18 PM »
Code: [Select]
IN GENERAL WORK UNDER THIS SECTION INCLUDES ALL LABOR, MATERIALS, EQUIPMENT AND ALL OTHER INCIDENTALS REQUIRED TO COMPLETE AND PLACE INTO SATISFACTORY OPERATION THE FOLLOWING MAIN ITEMS AND SYSTEMS.

1.  CONTRACTOR SHALL VISIT SITE AND FAMILIARIZE SELF WITH EXISTING CONDITIONS PRIOR TO SUBMITTING OF BID.

2.  ALL DIMENSIONS SHALL BE FIELD VERIFIED.  IN CASE OF DISCREPANCIES ARCHITECT/  ENGINEERS SHALL BE NOTIFIED. 

3.  COMPLETE EXHAUST SYSTEM INCLUDING, EXHAUST FANS, DUCTWORK, ETC. 

4.  ALL SUPPLY, RETURN AND EXHAUST DUCTWORK AS SHOWN AND AS REQUIRED. 

5.  ALL SUPPLY DIFFUSERS, REGISTERS, GRILLES, DAMPERS, LINING AND INSULATION AS REQUIRED. 

6.  ALL TEMPERATURE CONTROL AS REQUIRED AND AS SPECIFIED BY THE EQUIPMENT MANUFACTURER.  ALL WIRING SHALL BE CONDUIT.  POWER WIRING BY ELECTRICAL CONTRACTOR. 

7.  CHECKING, TESTING AND START UP OF ALL HEATING AND AIR CONDITIONING SYSTEMS. 

8.  ALL DUCTWORK SHALL BE CONSTRUCTED OF GALVANIZED SHEET METAL AND SHALL CONFORM TO THE LATEST EDITIONS OF ASHRAE GUIDE AND SMACNA STANDARDS. 

9.  ALL RETURN DUCTWORK SERVING EXISTING ROOF TOP UNITS SHALL BE LINED WITH 1" INTERIOR 3 LB. DENSITY FIBERGLASS LINING. 

10. FINAL LOCATION OF DIFFUSERS AND REGISTERS SHALL BE SUBJECT TO ARCHITECT'S APPROVAL. 

11. CONTRACTOR MAY REARRANGE PORTIONS OF THE DUCTWORK IF NECESSARY, SUCH AS SIZES OR LOCATIONS, IF FINAL CONSTRUCTION DETAILS REQUIRE. 

12. SHOP DRAWING SHALL BE FURNISHED PRIOR TO ORDERING EQUIPMENT AND COMMENCING OF ANY WORK. 

13. FURNISH AND INSTALL ALL MANUAL DAMPERS AS SHOWN AND AS REQUIRED.  DAMPERS SHALL BE OPPOSED BLADE DESIGN WITH LOW LEAKAGE BLADES. 

14.  PROVIDE ALL TESTING AND BALANCING.  SUBMIT REPORT FOR APPROVAL. 

15.  PROVIDE ALL STARTERS AND DISCONNECTS TO ELECTRICAL CONTRACTOR WITH EQUIPMENT FOR INSTALLATION.  (NEW EQUIPMENT) 

16. ALL EQUIPMENT WHETHER LOCATED ON HOOD, CEILING, SUSPENDED, OR LOCATED INSIDE SPACE SHALL BE COMPLETELY ISOLATED FROM STRUCTURE EITHER BY USING SPRING HANGERS OR SPRING SUPPORTS. 

17. CONTRACTOR SHALL NOTIFY MANAGEMENT OF ANY SERVICE DISRUPTIONS PRIOR TO COMMENCING OF ANY WORK IN OCCUPIED SPACES, IF APPLICABLE. 

18. FLEXIBLE CONNECTIONS SHALL NOT EXCEED 5'-0" AND SHALL BE CONSTRUCTED AS  PER WIREMOLD CO. 

19.  CONTRACTOR SHALL INSTALL THERMOSTATS WITH HIGH SETBACK AS SHOWN. 

20. CONTRACTOR SHALL INSPECT EQUIPMENT FOR PROPER OPERATION AND MAKE ALL ADJUSTMENTS AS REQUIRED. 

21. ALL SUPPLY DUCTWORK SERVING ROOF TOP UNITS SHALL BE EXTERIOR INSULATED WITH 1/2" OF EXTERIOR BLANKET INSULATION WITH VAPOR BARRIER. 

22. PROVIDE BALANCING DAMPERS ON ALL BRANCH DUCTS, AS SHOWN ON PLANS AND AS REQUIRED BY LOCAL CODE. 

23. CONTRACTOR SHALL VERIFY ALL VOLTAGES IN FIELD PRIOR TO ORDERING EQUIPMENT. 

24. ALL FRESH AIR INTAKE OPENINGS MUST BE LOCATED A MINIMUM OF 15'-0" AWAY FROM ALL EXHAUST, PLUMBING VENT OF COMBUSTION AIR OUTLETS AND 10'-0" ABOVE GROUND LEVEL. 

25. ALL DUCT CONNECTIONS TO EQUIPMENT SHALL BE MADE WITH FLEXIBLE CONNECTIONS. 

26. NOISE GENERATED BY HVAC EQUIPMENT SHALL NOT EXCEED 55 DB. AT PROPERTY LINE.

John Kaul (Se7en)

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Re: Help needed on HVAC Notes.
« Reply #3 on: May 16, 2008, 12:58:36 PM »
Im mech. This is residential? A furnace?
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CAB

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Re: Help needed on HVAC Notes.
« Reply #4 on: May 16, 2008, 02:00:45 PM »
Thanks Dommy.

John,
Residential Heatpump with a flex duct system.
Used to be the Owl system but the newer multi take off duct junctions.
It has a Fiberglass box at the return & supply at the AHU, larger main supply duct enters another fiberglass box where several smaller ducts run to registers.
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John Kaul (Se7en)

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Re: Help needed on HVAC Notes.
« Reply #5 on: May 16, 2008, 03:56:34 PM »
*blink-blink* holly cow!

Static pressure must be a bear! You got a manufacture? Check to see their max lengths and make sure your not over steeping those bonds. Other then that:
Add note to ``install per manuf. recommendations''
#3 ??Add the word program??
#4 Use something like: ``coordinate with other trades prior to instillation'' in lieu of just coord with elect.

Let me copy those notes and edit them. There are more i would like to modify.
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CAB

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Re: Help needed on HVAC Notes.
« Reply #6 on: May 16, 2008, 04:03:48 PM »
Equipmment specs for bid but will end up with Trane XL15i or better
Code: [Select]
SPECIFICATIONS (UNIT ##1)           
SPLIT HT PUMP (TRANE OR EQUAL)               2TWB3042/2TEC-42 w/ 7 KW
NOMINAL TONS                                 3.5                   
DESIGN CFM                                   1400                   
COOLING CAPACITY, BTUH                       39500                 
HEATING CAPACITY, BTUH @ 47 F                37200                 
EXTERNAL STATIC, IN WG                       0.30                   
V/PH/HZ (CU)                                 208-230/1/60           
MCA/MOCP (CU)                                21/35                 
V/PH/HZ (AH)                                 208-230/1/60           
MCA/MOCP (AH)                                44/45                 


SPECIFICATIONS (UNIT #2)     
SPLIT HT PUMP (TRANE OR EQUAL)               2TWB3018/2TEC-18 w/ 5 KW
NOMINAL TONS                                 1.5                     
DESIGN CFM                                   600                     
COOLING CAPACITY, BTUH                       17000                   
HEATING CAPACITY, BTUH @ 47 F                16000                   
EXTERNAL STATIC, IN \VG                      0.30                   
V/PH/HZ (CU)                                 208-230/1/60   
MCA/MOCP (CU)                                8/15       
V/PH/HZ (AH)                                 208-230/1/60   
MCA/MOCP (AH)                                27/30
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