BLK
4 Installation and connection
4.1 Requirements to the installation site
Aggregate
The aggregate must be set up to allow for unobstructed air flow and adequate room for maintenance/repairs. When installed
outdoors, be sure to consider the motor protection rating (standard: IP 55) and ensure adequate protection from the weather.
Air cooler
The aggregate must be set up to allow for unobstructed air flow and adequate room for maintenance/repairs. When installed
outdoors, be sure to consider the motor protection rating and ensure adequate protection from the weather.
The cooler must be located in such a way that the air flowing through the matrix has free flow on entry and exit. The distance
between air intake or air outlet to the nearest surrounding obstacle should be at minimum half the height of the matrix. Free
air flow must be provided.If the cooler is to be sited near to working personnel, the effect of hot draught and noise emissions
must be taken into account.
If the cooler is installed in closed space, ensure sufficient air circulation. Avoid back flow of warmed air. If necessary, the room
must be vented.
Due to lower temperatures with respect to closed rooms, the cooling capacity outside raises, but on the other hand higher start
up pressure may result due to higher oil viscosity. In this case, consider a bypass valve and / or a heating.
The rotating fan might lead to static charging. Therefore sensitive equipment like electronics should be kept away from the
device.
4.2 Installing the unit
The units are screwed in place at the attachment points using screws. Be sure the support structure is sized adequately. To pro-
tect the system from damage, the connections must be stress free. We recommend using flexible hoses. Be sure the hose is
stable against negative pressure, e.g. steel wire reinforced. Avoid possible leaks in the circuit to prevent environmental dam-
ages. If necessary, use an oil pan. Protect the aggregate from mechanical impact.
4.2.1 Installing swivel nuts in the fitting body
Proceed as follows:
– Carefully slide the preinstalled pipe end into the 24° cone on the fitting body.
– Tighten the swivel nut until a considerable increase in force can be felt (fixed point).
– Use a suitable spanner to tighten the swivel nut a 1/12 turn more (30°) beyond the fixed point. A marker line on the swivel
nut and the fitting body facilitates observing the correct tightening angle.
Tube
A.D.
Thread
Torque (Nm) for straight
screwed plug
Torque (Nm) sealing plug
6
G 1/8"
18
13
8
G 1/4"
35
30
10
G 1/4"
35
30
12
G 3/8"
70
60
15
G 1/2"
90
80
18
G 1/2"
90
80
22
G 3/4"
180
140
28
G 1"
310
200
35
G 1 1/4"
450
400
42
G 1 1/2"
540
450
6
Bühler Technologies GmbH
BE350025 ◦ 03/2019
