Trane LPC, Install And Operation Instructions, Page: 39 / 110

LPC-SVX01C-EN 39
installation
procedure
Installation
LPC Unit Corner Weight
Calculations
Calcute model LPC corner weights to
ensure you size isolators correctly.
Remember, units are not internally
isolated and require external isolators
provided at installation.
Before calculating the corner weights,
you must first calculate the total unit
weight. Add the coil, motor, and control
box weights to the main unit weight to
get the total unit weight. Weights are
listed in the Dimensions & Weights
section of this manual.
Example
This example uses a size 8 horizontal
unit, with a right-hand motor/drive &
control box.
Note: Include the wet coil weight. Motor/
drive control box always = 9 lbs.
1. Calculate total LPC operating weight:
component weight, lbs.
main unit 240
motor, 460/60/3, ½ hp 43
8-row hydronic coil 212.2
control box 9
Total operating weight = 504.2
Reference Figure I-IP-1 for a visual
explanation of the following steps.
2. Calculate the “leaving air side” corner
weights, labeled C & D in graphic.
• Divide the main unit weight by 4 to
get main unit corner weight:
240 ÷ 4 = 60 lbs.
• Divide the motor weight by 2 to get
the 2 corners. Add to the main unit
corner weight to get the total corner
weight: 43 ÷ 2 = 21.5 + 60 = 81.5 lbs.
Note: To get the total corner weight you
must add the motor/drive control box
weight to the correct unit side. See step 4.
3. Calculate the “entering air side”
corner weights, labeled A & B in the
graphic.
• Divide the coil weight by 2 to get the
2 coil weight corners of the entering
air side. Add to the main unit corner
weight of the entering air side: 212.2
÷ 2 = 106.1 lbs. + 60 lbs. = 166.1 lbs.
Note: To get the total corner weight you
must add the motor/drive control box
weight to the correct unit side. See step 4.
4. Add the motor/drive control box
weight to the correct unit side.
The unit can have the motor/drive control
box on either the right or left-hand side.
Verify this by inspecting the unit or
referencing the unit model number,
digit 12 .
In this example (right-hand motor/drive),
we will add the control box weight to the
leaving air side, corner weight C: 81.5 lbs
+ 9 lbs. = 90.5 lbs.
Figure I-IP-1. Corner weight calculation example: size 8 horizontal LPC with a
right-hand motor/drive & control box.
Corner D:
main unit ÷ 4 = 60 lb.
motor ÷ 2 = 21.5 lb.
total corner D = 81.5 lb.
Corner B:
main unit ÷ 4 = 60 lb.
coil ÷ 2 = 106.1 lb.
total corner B = 166.1 lb.
Corner C:
main unit ÷ 4 = 60 lb.
motor ÷ 2 = 21.5 lb.
control box = 9 lb.
total corner C = 90.5 lb.
Corner A:
main unit ÷ 4 = 60 lb.
coil ÷ 2 = 106.1 lb.
total corner A = 166.1 lb.
A
B
C
D
control box