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Trane Company (The)
Single & Dual Duct VAV Terminal Units
Single & Dual Duct VAV Terminal Units - Page 22
Single & Dual Duct VAV Terminal Units
| Performance Data
VCEE Electric Unit Heat Table P-7- Size 11 (Metric )
Volt |
Stage |
MIN
CFM (L/s) |
| MIN
kw |
>220(104) |
>330(156) |
>440(208) |
>550(260) |
| MAX kw |
MAX kw |
MAX kw |
MAX kw |
| 208/60/1 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 240/60/1 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 277/60/1 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 347/60/1 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 480/60/1 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
2.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 575/60/1 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
2.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 208/60/3 |
1 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
.5 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 480/60/3 |
1 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
2.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 575/60/3 |
1 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 2 |
1.0 |
3.5 |
5.5 |
7.5 |
9.0 |
| 3 |
2.5 |
3.5 |
5.5 |
7.5 |
9.0 |
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 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 |
|
