Dräger BG ProAir, Instructions For Use Manual

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24 Instructions for use |
Dräger BG ProAir
Maintenance
5.2.6.10 Checking the pre-flush unit
(only for apparatuses with on-demand oxygen dosage)
The pre-flush unit only needs to be checked for
apparatuses with on-demand oxygen dosage. This chapter
does not apply for apparatuses with constant oxygen dosage.
1. Set the selector switch on the test unit to .
2. Slowly fully open the cylinder valve.

Oxygen must be heard to flow into the circuit. The pre-
flush unit must automatically shut-down after max.
10 seconds.
5.2.6.11 Performing the high-pressure leak test (incl.
constant dosage device)
For apparatuses with constant oxygen dosage, the
constant dosage device is also automatically checked during
the high-pressure leak test.
1. Set the selector switch on the test unit to .
2. Slowly open the cylinder valve by at least two turns.
The Connect ECU automatically switches to On mode.
An acoustic signal sounds.
The battery status is shown on the display.
The Connect ECU queries whether to carry out the high-
pressure leak test ( ). If the query is confirmed, the
symbol and the current pressure are displayed.
A high-pressure leak test can only be carried out if the
cylinder pressure is at least 150 bar and the Connect ECU
is in On or Standby mode.
3. Close the cylinder valve.
For apparatuses with on-demand oxygen dosage, use the
Connect ECU to confirm that the cylinder valve has been
closed.
The test starts automatically for apparatuses with constant
oxygen dosage.

The test is carried out.
✓
The result of the test is shown after approx. 15 seconds.
The following results may occur:
– The closed-circuit breathing apparatus is OK. The
symbol is shown on the Connect ECU display.
– An error has occurred. The or symbol is shown
on the Connect ECU display.
Repeat the test or have the apparatus serviced.
If, for national or regulatory reasons, the constant
dosage device needs to be checked with a test unit,
see chapter 5.2.7.1.
5.2.6.12 Checking the bypass
1. Set the selector switch on the test unit to .
2. Slowly open the cylinder valve by at least two turns.
The Connect ECU automatically turns on and runs a self-
test.
3. Briefly press the bypass button.
Oxygen must be heard to flow into the circuit (flow noise).
5.2.6.13 Checking the minimum valve
1. Set the selector switch on the test unit to .
2. Swing the locking lever into the spring bridge and make
sure that it is latched in position.
3. Observe the display on the test unit and wait until the
pressure stops dropping.
4. Read the pressure on the display.
✓
The value must be b0.5 mbar and +3.0 mbar.
5.2.6.14 Checking low-pressure alarm 1
1. Set the selector switch on the test unit to .
2. Close the cylinder valve.
3. In apparatuses with on-demand oxygen dosage, gently
press the bypass button so that the pressure in the
breathing circuit drops.
The pressure automatically drops for apparatuses with
constant oxygen dosage.
4. Observe Connect ECU:
At approx. 55 bar, the colour on the display switches to red
and low-pressure alarm 1 should be triggered.
5. Remove the connecting piece from the test unit connector.

The apparatus is completely purged.
6. Fit the protective cap on the connecting piece.
7. Turn off the Connect ECU. To do so, simultaneously press
the right and left button until 3-2-1 is shown on the display.
The Connect ECU turns off.
8. Turn off the test unit.
5.2.7 Maintenance work on components
5.2.7.1 Checking the constant dosage device
(only for apparatuses with constant oxygen dosage)
Work equipment
– RZ 7000 (R62500)
– The following parts from the BG ProAir Test Set
(3722266):
(1) Quick connect coupling (3722211)
(2) Test hose (E02120)
(3) Adaptor RZ 7000 (R62599)
The constant dosage device only needs to be checked for
apparatuses with constant oxygen dosage. This chapter does
not apply for apparatuses with on-demand oxygen dosage.
The constant dosage device is automatically checked during
the high-pressure leak test. If necessary, it can also be
checked separately at the Dräger RZ 7000.
1. Creating the test setup:
a. Switch on the test unit.
b. Connect the test hose (2) to the test unit using the
adaptor RZ 7000 (3).
c. Connect the test hose with the quick connect coupling
(1) to the medium-pressure hose for the oxygen supply
at the CO
2
absorber (see overview graphic at start of
instructions, item 7).
2. Swivel the spring bridge upwards in order to disable the
function of the minimum valve.