HOT WATER COIL DATA • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog
23
The ENVIRO-TEC
®
Windows
®
based Computer Selection Program is available through your ENVIRO-TEC
®
representative for complete CFR
selection and hot water coil performance data.
Model CFR-WC
Standard Features
• Designed, manufactured and tested by ENVIRO-TEC
®
• Aluminum fin construction with die-formed spacer
collars for uniform spacing
• Mechanically expanded copper tubes, leak tested to
450 PSIG air pressure and rated at 300 PSIG
working pressure at 200°F
• 1, 2, 3 and 4 row configurations
• Male sweat type water connections
• Top and bottom access plates in coil casing for fan
sizes 04 through 24. Coil access through bottom
casing panel for fan sizes 30, 40 and 44.
Optional Features
• Steam coils
• Multi-circuit coils for reduced water pressure drop
• Opposite hand water connections
Definition of Terms
EAT Entering Air Temperature (°F)
LAT Leaving Air Temperature (°F)
EWT Entering Water Temperature (°F)
LWT Leaving Water Temperature (°F)
CFM Air Capacity (Cubic Feet per Minute)
GPM Water Capacity (Gallons per Minute)
MBH 1,000 BTUH
BTUH Coil Heating Capacity
(British Thermal Units per Hour)
ΔΔ
T EWT minus EAT
Selection Procedure
Hot Water Coil Performance Tables are based upon a tem-
perature difference of 115°F between entering water and
entering air. If this ΔT is suitable, proceed directly to the
performance tables for selection. All pertinent perfor-
mance data is tabulated.
The table above gives correction factors for various entering ΔT
’
s (difference between entering water and entering air tempera-
tures). Multiply MBH values obtained from selection tables by the appropriate correction factor above to obtain the actual MBH
value. Air and water pressure drop can be read directly from the selection table. The leaving air and leaving water temperatures
can be calculated from the following fundamental formulas:
LAT = EAT + BTUH LWT = EWT - BTUH
1.085 x CFM 500 x GPM
To Next Page
Loading...
Need help?
General