Huntleigh Flowtron AC550, Service Manual

Page: 24 / 42

4.1.2 General Service - Pump
Initial Assessment (Visual)
Check:
a)
Enclosure condition
b) Fittings for damage and security
c) Labelling is secure and legible
Open pump and check:
d)
Wiring security and terminations are secure
e) Tubing security and integrity
f) Component fastenings are secure
g) General condition inside is clean
Open compressor and check:
h)
Bellows assembly condition
i) Silencer bag weld seams
General:
j)
Check power cord assembly for security
k) Clean condition of pump
If any items in a) - j) appear defective, replace using an appropriate spare part
and record action on the service record sheet.
Re-assemble pump unit completely, run for a minimum of 1 hour and check
calibration. Adjust if required.
Note:
It is important to ensure all tools used for servicing are kept in good
condition, and test rigs for measuring flow and pressure are regularly
calibrated to a reference master gauge calibrated to a National Standard.
4.2 Pressure Output and Calibration Checks
A calibrated Manometer/Pressure Meter with better than 0.5 mmHg accuracy.
In normal operation, when the display reads 40, the knob points should be
somewhere within the marked 40 mmHg arc. If not, the pump should be
returned for re-calibration. The error could be due to :
a)
Inaccuracy of the pressure setting control - see Section 4.3
Pressure Control Calibration.
247901 4-2 Issue 1
March 1998