Danfoss iC7 Series Operating Manual page 34

iC7 Series Cooling Modules
Operating Guide
6.16 Doing the Pressure Test
PRESSURIZED WATER
Pressurized water can cause injury to the eyes.
-
Wear safety goggles.
-
During the pressure test, keep a safe distance to the cooling module.
DAMAGED EQUIPMENT
Doing a pressure test on damaged equipment can damage the equipment further and can lead to injury.
-
Do not do a pressure test if the cooling module equipment is damaged.
-
If the cooling module equipment is damaged, remove the pressure before doing service work.
The pressures mentioned here are only valid for the cooling module. The customer and end-user are responsible for all other
piping made to the drive circuit or external circuit. The customer and end-user are also responsible for any changes made to the
piping on the cooling module.
To make sure that every connection made on site is sufficiently tightened, a pressure test is necessary. Use water for the pressure
test.
The maximum test pressure of the cooling module is 1.5 x maximum pressure. The lowest maximum pressure connected to the
system determines the maximum pressure of the whole system. Therefore, if the cooling module is connected to the iC7 drive cir-
cuit, the maximum pressure of the drive circuit determines the maximum test pressure.
Table 8: The Maximum Test Pressure of the Cooling Module
Circuit
iC7 drive circuit
Cooling module
External circuit
The lowest maximum pressure of the components included in the system determines the maximum pressure of the system.
1
The lowest maximum pressure of the components included in the external circuit determines the maximum pressure of the external circuit.
2
Make sure that the cooling module is not powered up before starting the test procedure.
The relief valve opens at 3 bar, therefore it must be removed and the connection plugged to do the pressure test.
The relief valve is at the suction side of the cooling module. The pressure on the pressure side (after the pump) can be over 3 bar
without the relief valve opening.
The pressure gauge on the expansion tank (-PG11) indicates the suction side pressure.
Procedure
34 | Danfoss A/S © 2022.02
W A R N I N G
W A R N I N G
N O T I C E
Maximum pressure [bar]
5
6
10
Maximum test pressure [bar]
7.5
(1)
9
15
(2)
AQ339830072437en-000202 / 172F0589
Cooling Installation