Dräger BG ProAir, Instructions For Use Manual

 Maintenance

Instructions for use

  |  

Dräger BG ProAir

21

5.2.5.6 Fitting the drainage valve and relief valve

The valve discs must be clean and intact and be in contact 

with the entire circumference of the valve seat. Replace faulty 

valve discs!

1. Fit the relief valve:

a. Fit the stepped valve disc (2) to the valve seat (1).
b. Insert the shaft of the valve disc (3) in the hole of the 

valve seat (1).

c. Make sure the spring (4) is secured with a coil under 

the hook in the lid (5). Position the spring (4) centrally 

on the valve disc (3).

d. Fit the lid (5) and screw closed until it locks into place.

2. Insert the relief valve in the breathing bag.

Both engagement hooks must be correctly engaged. 

When inserting, make sure that a click is heard.

3. Assemble the drainage valve:

a. Insert the shaft of the valve disc (2) in the hole of the 

valve seat (1).

b. Make sure the spring (3) is secured with a coil under 

the hook in the lid (4). Position the lid (4) with the 

spring (3) centred on the valve disc (2).

c. Fit the lid (4) and screw closed until it locks into place.

5.2.5.7  Installing the breathing bag

1. Slide the pouch of the breathing bag onto the minimum 

valve lever and place the breathing bag entirely in the 

carrying frame.

Make sure that the breathing bag is not positioned on 

the lever, but that the minimum valve lever is correctly 

inserted in the pouch of the breathing bag and the 

breathing bag is not lying on the bracing rail of the carrying 

frame.

2. Fasten the breathing bag with the locking mechanisms to 

the CO

2

 absorber and breathing air cooler. Every locking 

mechanism has two lock buttons with engagement hooks. 

Ensure the locking mechanisms on the CO

2

 absorber and 

breathing air cooler fully engage:

a. Push the locking mechanism on the underside onto the 

connection of the CO

2

 absorber or breathing air cooler 

until the lower engagement hook clicks into place. 

Make sure that a click is heard when doing so.

b. Push the locking mechanism on the upper side onto 

the connection of the CO

2

 absorber or breathing air 

cooler until the upper engagement hook clicks into 

place. Make sure that a click is heard when doing so.

The locking mechanisms must engage. When 

connecting, make sure that a click is heard.

c. Gently pull the breathing bag and check whether the 

locking mechanisms are secure.

3. Position the spring bridge on the mounts in the closed-

circuit breathing apparatus and swivel by 90°. Make sure 

the breathing bag does not get stuck between the spring 

bridge and carrying frame and that the relief valve is 

positioned in the recess for the pressure plate.

4. Click the spring bridge on each side into the carrying 

frame. Make sure that a clicking sound can be heard on 

both sides.

5. Insert the drainage valve in the mount of the carrying 

frame.

5.2.5.8  Fitting the compressed oxygen cylinder

1. Check the high pressure sealing ring on the pressure 

reducer connecting piece for damage and contamination. 

It must be clean, free of grease and intact. Replace if 

necessary.

2. Remove the lock nut from the compressed oxygen 

cylinder.

3. Place the compressed oxygen cylinder in the cylinder 

mount.

45197

45453

1

3

4

5

2

3

2

1

4

46603