Thermolec Application &Technical Notes Manual do Utilizador descarregar pdf (Página 5)

HOW TO SELECT AND SPECIFY IN THREE EASY STEPS

Selecting the heater for your application can be done in three easy steps:

1- Determine heater capacity, voltage and electrical components

2- Determine duct dimensions, air requirements and mechanical options

3- Determine method of control, then select control components

STEP 1 -

DETERMINE HEATER CAP

ACITY, VOLT

AGE AND ELECTRICAL COMPONENTS

Heater capacity

Given CFM (v

olume of air in cubic feet per minute) and

D ºT (temperature r

ise in º F ),

the KW capacity can be determined from the f

ormulas:

NOTE:

The above formulas are for standard air. Consult your Thermolec representative for non-standard air

conditions.

* Maximum air temperature rise for which the heater is designed

** This formula is for quick calculation and contains a loss allowance of 5%.

THREE

EASY

STEPS

KW** =

CFM x Temperature Rise, ºF*

3000

Temperatur

e Rise, ºF =

KW x 3000

CFM

1 2 3 4 5 6 7 8 9 10 ... 72 73

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Thermolec Application &Technical Notes Manual do Utilizador Página 5