IOM SYSVRF2 AHU BOX0620 20220209 134828067 20220209 141028052

09
Figure 3-8
Figure 3-9
3.5 Temperature Sensor
Installation
There are five temperature sensors (T1, TA, T2A, T2,
and T2B) and five extension wires in the accessories, as
shown in Figure 3-8.
Mounting location for temperature sensors:
T1 is an AHU inlet air temperature sensor; it should be
installed at the air inlet of the AHU.
T2A is an AHU evaporator inlet temperature sensor; it
should be installed at the inlet pipe of the evaporator.
T2 is an AHU evaporator intermediate temperature
sensor; it should be installed at the intermediate pipe of
the evaporator.
T2B is an AHU evaporator outlet sensor; it should be
installed at the outlet pipe of the evaporator.
TA is an outlet air temperature sensor and therefore does
not need to be installed if outlet air temperature control is
not selected.
Mounting location of T2A, T2, and T2B tube temperature
sensors
Temperature sensor Extension wire
T1
T2
T2B
WhiteWhiteWhite
Black
BlackBlack
Red Red
TA
White
T2A
Blue
BlackBlack
BlueBlue
Red
T1, TA
T2A, T2, T2B
Liquid pipe
Gas pipe
T2B
T2
T2A
3.4.7 Example
Controller box
capacity A
(×100W)
Φ9.53
Φ12.7
Φ15.9
Table 3-9
Take (56+28+14)kW that composed by three control
boxes as an example to clarify the pipe selection.
A. The branch pipe at the controll box.
There are a~c branch pipe at the control box, the branch
pipe diameter should be select as Table. 3-6.The pipe
a1/a2 diameter is Φ15.9,the pipe b1/b2 diameter is Φ
12.7,the pipe c1/c2 diameter is Φ9.53.
B. Main pipe at the control box (Refer to Table. 3-8)
1) The main pipe L
1/L2 with N1, N2 downstream control
box that total capacity is 280+140=420, the pipe L1
diameter is Φ12.7, thus select JOINT IN 02 2P for the
branch joint B.
2) The main pipe L
3/L4 with N0 N1 N2 downstream
control box that total capacity is 560+280+140=980,the
pipe L
3/L4 diameter is Φ19.1, so select JOINT IN 04 2P
for the branch joint A.
3) The branch joint A with N
0~N2 downstream control
box that total capacity is 560+280+140=980, thus select
JOINT IN 04 2P for the branch joint A.
BOX 90200
90≤A≤200
Liquld side(mm)
BOX 200360
200<A≤360
BOX 360560
360<A≤560
Note:
1) The pipe L
3 diameter is still related to outdoor unit,
take the large one for your selection.
2) The gas pipe should be confirmed according to the
outdoor unit installation manul.