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  Trane Company (The)   Single & Dual Duct VAV Terminal Units  

Single & Dual Duct VAV Terminal Units - Page 21

   

Single & Dual Duct VAV Terminal Units

Performance Data   VCEE Electric Unit Heat

Table P-6- Size 06 (Metric)

 

Volt

  

Stage

 MIN CFM (L / s)
 

MIN kw

 >120 (57) >180 (85) >240 (113) >300 (142)
MAX kW MAX kW MAX kW MAX kW
208/60/1 1 .5 1.0 2.5 3.5 4.0
2 .5 1.0 2.5 3.5 4.0
3 1.0 1.0 2.5 3.5 4.0
240/60/1 1 .5 1.0 2.5 3.5 4.0
2 .5 1.0 2.5 3.5 4.0
3 1.0 1.0 2.5 3.5 4.0
277/60/1 1 .5 1.0 2.5 3.5 4.0
2 .5 1.0 2.5 3.5 4.0
3 1.0 1.0 2.5 3.5 4.0
347/60/1 1 .5 1.0 2.5 3.5 4.0
2 .5 1.0 2.5 3.5 4.0
3 2.0 - 2.5 3.5 4.0
480/60/1 1 .5 1.0 2.5 3.5 4.0
2 1.0 1.0 2.5 3.5 4.0
3 - - - - -
575/60/1 1 1.0 1.0 2.5 3.5 4.0
2 1.5 - 2.5 3.5 4.0
3 - - - - -
208/60/3 1 .5 1.0 2.5 3.5 4.0
2 .5 1.0 2.5 3.5 4.0
3 1.0 1.0 2.5 3.5 4.0
480/60/3 1 1.0 1.0 2.5 3.5 4.0
2 1.0 1.0 2.5 3.5 4.0
3 3.0 - - 3.5 4.0
575/60/3 1 1.5 - 2.5 3.5 4.0
2 1.5 - 2.5 3.5 4.0
3 - - - - -

Notes :

1. Coils available with electric, electric with mercury contactors, pneumatic-electric switches, and pneumatic-electric switches with mercury contactors.

2. Available kW increments are by 0.5 kw from 0 to 8.0 kw by 1.0 kw by 1.0 kw from 9.0 to 17.0 kw, and by 2.0 kw from 18.0-26.0 kw.

3. Each electric actuator draws 1.0 amp.

4. Each heat output draws a maximum of 0.5 amp.

5. On three-phase heaters the lineload is unbalanced.

6. Adequate airflow over heater is necessary to dissipate heat. As kw requirements increase, so must minimum airflow. Above chart indicates the minimum Cfm required for each KW range.

Example :

A Model VCEE, electric unit heat size 11 terminal unit has 480V/3 phase 5.0 kw electric heat with 3 stages.

Electric Actuator = 1.0 Amp
5.0 kw 3-Phase Heater 5.0 x 1000 = 6.0 Amp
480 x 1.73 
Three heat outputs (at 0.5 each, max) = 1.5 Amp Max
    8.5 Amp Max

Useful Formulas

KW = Cfm x delta T
        3145
delta T = KW x 3145
        Cfm
1 Phase Amps = KW x 1000
   Prim. Voltage
3 Phase Amps =      KW x 1000       
   Prim. Voltage x 1.73
KW = L / s x delta T
         824.6
delta T = KW x 824.6
           L / s



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