State Of Delivery; Connecting The Refrigerant Pipes; Mounting The Pressure Relief Valve; Connection For Pressure Gauge - Bitzer K033N Instructions De Service

Coolant: seawater
If, due to local conditions, the seawater in use can
lead to scale or shell deposits:
▶ Fit suitable filters.

4.4 State of delivery

The pressure equipment is sealed in the state of deliv-
ery and filled with protective charge. The protective
charge overpressure is 0.2 .. 0.5 bar nitrogen. All Rota-
lock and flange connections are closed by blanking
plates.
▶ Remove the blanking plates and sealing caps, when
mounting.

4.5 Connecting the refrigerant pipes

The pipe connections are suitable for pipes in all com-
mon dimensions in millimetres and inches. Brazed con-
nections have stepped diameters. The pipe will im-
merge more or less depending on its dimensions. If not
required the end with the largest diameter can be cut-
off.
▶ First relieve the excess pressure from the pressure
equipment: Open the connections carefully.
▶ Remove shut-off valves and/or brazed connections
carefully.
NOTICE
!
!
Potential chemical reactions due to air penetra-
tion!
After opening the pressure equipment install it
as soon as possible into the system.
▶ Reseal the pressure equipment during installation
breaks.
NOTICE
!
!
Do not overheat the shut-off valves!
Cool the valve body during and after the brazing
operation.
Maximum brazing temperature 700°C!
▶ When brazing or welding, rinse the corresponding
conductive parts with inert gas.
DANGER
Risk of bursting the pressure equipment due to
mechanical stress.
Serious injuries are possible.
Connect the pipes to the pressure equipment
without load and stress!
DB-200-6
4.5.1

Mounting the pressure relief valve

Internal thread 3/8-18 NPTF:
▶ Screw in the pressure relief valve.
External thread 1 1/4-12 UNF:
▶ Screw the pressure relief valve into the adaptor.
▶ Then fasten the adaptor at the pressure equipment
with the union nut.
Available adaptors
1/2-14 NPTF
22 12
1 1/4-12 UNF 1 1/4-12 UNF
366 005-01
1/2-14 NPTF
22
1 1/4-12 UNF 1 1/4-12 UNF
366 005-03
Fig. 2: Adaptors for the pressure relief valve
4.5.2

Connection for pressure gauge

Only use it for maintenance work, not during operation.
Never connect a pressure limiter to it!
G 1/2 3/8 8 -1 NPTF
22 12 22
1 1/4-12 UNF
366 005-04 366 005-05
G 1/2
22
366 005-02
37