Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
21
duty 15 Amp socket.
Compressors fitted with a heavy duty three-pin 15 Amp plug (on which the earth pin is noticeably
larger in cross-section than the other two pins) must only be connected to a heavy duty 15 Amp
socket. No other electrical appliances should be connected to the same branch circuit. Under no
circumstances should a 15 Amp plug be modified to fit into a 10 Amp socket. This is a dangerous
practice and will void warranty on the motor.
Compressors fitted with dual motors must only be connected to two separate 15 Amp sockets. No
other electrical appliances should be connected to either of these branch circuits.
The direction of motor rotation has been correctly pre-set at the factory during manufacture. If
fitting a replacement motor, check that its direction of rotation is anti-clockwise when viewed
looking onto the motor output shaft or compressor pump pulley.
Each 240 Volt motor is fitted with its own manual reset thermal overload protection device. In the
event that it is activated due to an overload condition, it is necessary to allow the motor to cool
down before the overload switch can be manually reset.
5.7.2
415 Volt Air Compressors
These models are shipped with a pre-wired four-core flexible electrical supply lead that must be
either terminated in a suitable four-pin plug or hard-wired for connection to a dedicated electrical
supply of adequate capacity fitted with a circuit breaker or fused disconnect switch. The minimum
recommended circuit breaker ratings listed in Table 5-3 serve as a general guide only for dedicated
supply to the compressor. This electrical installation work must be carried out by a licensed
electrician.
Table 5-3
415 Volt Electricity Supply
Air
Compressor
Model
Main
Motor
Rating
(kW)
Main
Motor
Starting
Method
Maximum
Running
Current
(A)
Minimum
Circuit
Breaker
Rating
(A)
Circuit
Breaker
Tripping
Curve
HT20, T20
2.2
Direct On Line
4.8
10
D
B23, V25
3
Direct On Line
6.4
10
D
B29, T30
4
Direct On Line
8.3
16
D
V30-OF
4
Direct On Line
9.3
16
D
V40, T40-OF
5.5
Direct On Line
12.2
20
D
B52, T55, T55-OF
7.5
Direct On Line
16.1
25
D
T75
11
Star-Delta
23.0
32
C or D
The maximum running current may exceed the specified value in practice if the electricity supply
voltage or power factor are below their rated levels. A four-wire conductor is required for the
electricity supply, i.e. three-phase and earth; no neutral is required. For additional protection against
electric shock, it is recommended to include a fixed setting residual current device (RCD) with rated
operating residual current not exceeding 30 mA.
The direction of motor rotation must be checked and properly adjusted during electrical installation.
For correct compressor operation, the motor rotation must be anti-clockwise when viewed looking