Trane LIFT 81-P - Connection to the System

16
4 | Water connections
A A: Condenser connections (user side)
B
Evaporator connections (source side)
Adding glycol changes the physical characteristics of the water and
the performance of the machine.
The table indicates the multiplicative factors to calculate the
performance change based on the percentage of glycol used.
% G
10
20
30
40
50
Tc
-4.5
-9.5
-15.5
-21.5
-32.5
CQ
0.975
0.953
0.931
0.914
0.882
CP
0.998
0.995
0.99
0.985
0.975
CG
1.01
1.04
1.08
1.14
1.2
CP
1.05
1.13
1.21
1.26
1.32
% G = Glycol percentage
Tc = Water freezing temperature (°C)
CQ = Cooling capacity correction factor
CP = Electrical power absorbed correction factor
CG = Water flow correction factor
Cp = Pressure drops correction factor
4.4 Connection to the system
All exchangers that can be connected directly are equipped with
grooved connections.The units are all supplied with tubes with
grooved connection on one side and welding connections on the
external side, together with the relevant connecting clamp and
gasket. These allows the installer to make the most appropriate
connection. By welding, in fact, it is possible to connect a threaded or
flanged sleeve or even a grooved sleeve for a grooved connection.
4.4.1 Models without hydronic kit
In these models, the connections are positioned outside the unit.
Remove the protection caps from the connections.
Connect the pipes to the connections.
Provide shut-off valves and anti-vibration joints on the
connection pipes.
During the hydraulic connection operations, never operate with
free flames near or inside the unit.
A A: Condenser connections (user side)
B
Evaporator connections (source side)