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DETAILSMEP/ HVAC
DETAILS
At times, the architect and engineer need a drawing that gives a three-dimensional appearance. These drawingsare labeled Detail on the plans under the title of the detail. Details are not usually drawn to scale. For clarity,the drafter notes Not to Scale or gives the scale used. Some examples of such drawings are shown in DetailsFigures 22 through 26 . Each of these details gives a realistic view of the object along with specific necessaryinformation.
Details, are included on plans to relay information from the architect to persons who will be studying theconstruction drawings.
Details, may be on a separate page or on unused spaces on the construction drawings. A detail shows how materials and components are joined, and it is not usually drawn to scale . Details are
often drawn using the isometric or oblique drafting method.
MECHANICAL DETAILS
Some details that are commonly used in themechanical engineers office are as follows:
1. Mechanical unit details2. Fan details3. Equipment mounting bases4. Unit hangers details5. Roof-mounted equipment6. Supply and return air terminals7. Detail of special valves8. Duct connections9. Piping details
10. Pump details11. Damper details
12. Insulation details13. Coil mounting details14. Louver details15. Equipment connection details
Mechanical details should include such infor-mation as the type of materials used, how differentmembers are joined together, necessary dimensionsfor different members, connection points, and hangersor mounting devices.
SECTION 2 / SpecificsDETAILSMEP/ HVAC 120
DETAILS Figure 22. Oblique detail of a hot water unitheater.
RETU
RN
F L O W
GATE VALVE
UNION
FLOW SUP
PLY
GLOBE VALVE
UNIONUNIT HEATER
CONTEN
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SECTION 2 / SpecificsDETAILSMEP/ HVAC 121
G
SUPPLY DUCT
DUCT TRANSITIONS
ELBOW
FLEXIBLE DUCTCONNECTION
COOLING COIL
GAS VENT UPTHROUGH ROOF
GAS LINE
MANUAL SHUT-OFF VALVE
DIRT TRAP
UNION
100% SHUT-OFF GASCONTROL VALVE
4" HIGH CONCRETE HOUSEKEEPINGPAD ON CONCRETE FLOOR
RETURN AIR DUCT
FILTER SECTION
CONDENSATE DRAIN LINE
REFRIGERANTLIQUID LINE
REFRIGERANT
SUCTION LINE
NOTE: NOT TO SCALE
DETAILS Figure 23. Detail of connections to a gas furnace in an A/C unit.
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SECTION 2 / SpecificsDETAILSMEP/ HVAC 122
AIR VENT
HOT WATER
HEATING COIL
UNION
BALANCING VALVEGLOBAL VALVE
3-WAY CONTROL VALVE
GATE VALVE
FLOW
FLOW
DETAILS Figure 24. Detail of hot water heating coil with three-way control valve.
CONTEN
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SECTION 2 / SpecificsDETAILSMEP/ HVAC 123
REFRIGERANTPIPING
REFRIGERANTPIPING
CONDENSINGUNIT
CONDENSINGUNIT
CONCRETEPAD
CONCRETEPAD
FAN WITH FAN GUARD
EXTENSIONLINES (TYPICAL)
FINISHEDGRADE
PLAN VIEW
ELEVATIONVIEWAIRINTAKE
AIR DISCHARGE
E X T E R I
O O R
C I R C U
I T B R E A
K E R C O
N D E N S I N
G
U N I T
P O W E
R I N
F L E X I B
L E
C O N D
U I T
R E F R I G
E R A N T
L I Q U I D
L I N E
R E F R I G
E R A N T
S U C T I O
N L I N E
O U T S I
D E
C O I L
6 " C O N
C R E T E
P A D
O N G R
A D E
A I R I N T A K E
A I R D I S C H A R G E
DETAILS Figure 25. Plan view and elevation view of condensing unit.
DETAILS Figure 26. Detail of outside condensing unit.
CONTEN
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SECTION 2 / SpecificsDETAILSMEP/ HVAC 124
DETAILS Figure 27. Exhaust fan detail.
VIEW PHOTO
CONTEN
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SECTION 2 / SpecificsDETAILSMEP/ HVAC 125
DETAILS Figure 28. Fresh air intake.
VIEW PHOTO
CONTEN
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