Pneumatech HTM02-01, Operation And Maintenance Manual

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Installation, Operation and Maintenance Manual
Page 20 Medical Vacuum Plant
d) If the rotation of any pump is incorrect, isolate the plant at the distribution boards. Get a
qualified electrician to check the phases are connected in the correct sequence. If
necessary change L1 (red) and L3 (blue).
7.1.10
Proving the Vacuum Pumps
a) Once correct rotation has been achieved, switch on both isolators and allow the pumps to
evacuate the reservoir to duty cut-out of 650mm/Hg.
b) Ensure No. 1 is selected as duty and vent the reservoir through the manual drain until No.
1 vacuum pump starts.
c) Isolate No. 1 vacuum pump and vent the reservoir and check No. 2 runs as standby.
d) Select No. 2 as duty and with both isolators on, vent the reservoir until No. 2 starts.
e) Isolate No. 2 vacuum pump and vent the reservoir and check No. 1 runs as standby.
f) Repeat steps a) to e) for pumps 3,4 and 5 if applicable.
Assuming steps a) to e) can be achieved the vacuum pumps are now proved. To reset the alarms
see Alarm Pressure Switch Adjustment, 7.3.
Note:
a) Vacuum pressure switch settings will vary due to small changes in barometric pressure
and ambient temperatures.
b) Vacuum pumps have a minimum run time of 30 seconds.
7.1.11
Proving the Alarm Circuits
From the previous commissioning instructions the operator will have become familiar with the
plant operation.
To Prove the Interface Indicator Conditions:
The interface indicator is located on the plant control unit.
Plant Fault
a) Check the indicator shows ‘Normal’
b) Isolate either or both pumps ‘Plant Fault’
c) Reinstate power and press reset to return ‘Normal’
Plant Emergency
a) Check the indicator shows ‘Normal’
b) Valve off both pumps and drop vacuum to Receiver, pressure 450mm/Hg ‘Plant
Emergency’
c) Reinstate power and check interfaces return to ‘Normal’
Pressure Fault Pipeline
a) Check the indicator shows ‘Normal’
b) Reduce the vacuum in the line.
c) Reinstate line pressure and check interface returns to ‘Normal’
7.2 Proving the Alarm Interface Indicator Conditions
The alarm INTERFACE INDICATOR is located on the Plant Control Unit.