Trane YSC060-120 User Manual
RT-PRC017-EN
10
Selection
Procedures - SI Units
Procedures - SI Units
Cooling Capacity
Step 1 — Calculate the building’s total
and sensible cooling loads at design
conditions. Use the Trane calculation
form or any other standard accepted
method.
and sensible cooling loads at design
conditions. Use the Trane calculation
form or any other standard accepted
method.
Example: The following are the building
cooling requirements:
a. Electrical Characteristics: 380-415/50/3
b. Summer Design Conditions: Entering
cooling requirements:
a. Electrical Characteristics: 380-415/50/3
b. Summer Design Conditions: Entering
Evaporator Coil: 27° DB/ 19° WB
Outdoor Ambient: 35°
Outdoor Ambient: 35°
c. Total Cooling Load: 16.5 kW
d. Sensible Cooling Load: 11.8 kW
e. Airflow: 3400 m
d. Sensible Cooling Load: 11.8 kW
e. Airflow: 3400 m
3
/h External Static
Pressure: 125 Pa
f. Downflow Configuration
Step 2 — Size the equipment using Table
PD-1 to match the cooling loads at
design conditions.
PD-1 to match the cooling loads at
design conditions.
Table PD-1 shows that a YSC060AD has
a gross cooling capacity of 17.8 kW and
14.4 kW sensible capacity at 35 DB
ambient and 3400 m
a gross cooling capacity of 17.8 kW and
14.4 kW sensible capacity at 35 DB
ambient and 3400 m
3
/h with 27 DB/ 19
WB air entering the evaporator.
Use the following formula to calculate
fan motor heat, which can be found in
the notes in Table PD-8:
fan motor heat, which can be found in
the notes in Table PD-8:
Fan motor heat (kW)
= 1.144 x (Fan kW) + 0.132
= 1.144 x (Fan kW) + 0.132
For example: With 3400 m
3
/h and 125 Pa,
specified by the engineer, Table PD-8
shows 0.73 kW for a high heat model.
shows 0.73 kW for a high heat model.
Fan motor heat =
1.144 x 0.73 + 0.132 = 0.97kW
Net Total Cooling =
17.8 kW - 0.97 = 16.8 kW
Net Sensible Cooling Capacity
14.4 kW - 0.97 = 13.4 kW.
1.144 x 0.73 + 0.132 = 0.97kW
Net Total Cooling =
17.8 kW - 0.97 = 16.8 kW
Net Sensible Cooling Capacity
14.4 kW - 0.97 = 13.4 kW.
Heating Capacity
Step 1 — Calculate the building heating
load using the Trane calculation form or
other standard accepted method.
load using the Trane calculation form or
other standard accepted method.
Step 2 — Size the system heating
capacity to match the calculated
building heating load. The following
are building heating requirements:
a. Total heating load of 17.6 kW
b. 3400 m
capacity to match the calculated
building heating load. The following
are building heating requirements:
a. Total heating load of 17.6 kW
b. 3400 m
3
/h
c. Fuel - Natural gas
For the YSC060AD there are two
heating capacities available, 19.6 kW
and 29.3 kW input models shown in
Table PD-32. The output capacities of
these furnaces are 15.7 kW and 23.4 kW
respectively. The high heat model with
23.4 kW best matches the building
requirements, indicating a YHC060AD*
should be selected.
heating capacities available, 19.6 kW
and 29.3 kW input models shown in
Table PD-32. The output capacities of
these furnaces are 15.7 kW and 23.4 kW
respectively. The high heat model with
23.4 kW best matches the building
requirements, indicating a YHC060AD*
should be selected.
Air Delivery Selection
External static pressure drop through
the air distribution system has been
calculated to be 150 Pa. Enter Table PD-
8 for a YSC060AD*H at 3400 m
External static pressure drop through
the air distribution system has been
calculated to be 150 Pa. Enter Table PD-
8 for a YSC060AD*H at 3400 m
3
/h and
150 Pa static pressure. The standard
motor will give the desired airflow.
motor will give the desired airflow.
Accessory Selection
Select accessories needed to
accommodate the application.
Select accessories needed to
accommodate the application.