Huntleigh AlphaBed, Service Manual

Page: 13 / 94

Table 3 - Air Pressure/Flow Rates
Pump
Model
Minimum
Pressure
(mmHg)
Maximum
Pressure
(mmHg)
Adjustable
Pressure
Range
Minimum Flow
Rate at 20 mmHg
back pressure
(litres/minute)
Minimum Flow
Rate at 50
mmHg
(litres/minute)
ALX 20-24 57-73 Yes 6 3
ALR 20-24 72-92 Yes 6 3
ALS 83-87 Less than 110 Comfort
control only
3.25 2.25
ALT 25-35 65-81* Yes 6 3
ALB 25-35 80-100 Yes 6 3
ALC 25-35 80-100 Yes 6 3
* Holland pumps (ALT10) only - max pressure is 80-100 mmHg
Pump units may be divided, into two types, Mechanical and Electronic. Major differences between
the two types of pump unit are as follows:
•
Alarm indicators - mechanical type has a neon indicating low air pressure, also an illuminated
mains/power on/off switch. The electronic type incorporates an alarm monitoring PCB driving a
number of LED indicators and audible warning sounder. See Table 4 for visual indicator
details.
•
Air outlets - mechanical type has simple push-on connectors (except ALX11 which has
snap-lock type connectors). The electronic type utilises snap-lock type connectors.
Table 4 - Product Visual Indicators
Model Code ALB ALC ALT ALR ALX ALX ALS
Mechanical (M)
or
Electrical (E)
M M M E E M E
Indicator
Illuminated Mains/Power Switch X X X X
On X X X
Wait X X
Low Pressure X X X X X X X
Power Fail X X X
System Start Up Sequence
All pump types must be connected to the appropriate mains/power supply via a suitable plug.
After a mechanical pump is switched on the start up sequence is as follows:
•
The ON/OFF switch lever will be illuminated green.
Issue 2 Chap 1
Nov 2001 SER0004 Page 5
Mini Pump Service Manual Introduction