10
Electrical
Caution: All plumbing works should be completed first before
proceeding to electrical wiring connections. The heater must
be used in conjunction with an approved type of RCD 10mA
sensitivity.
a. Switch off the electrical supply.
b. Remove the maintenance cover.
c. Insert the electrical cable through the maintenance cover. Ensure that
all cables are fully tighten to the terminal block. Connect cables as
follows:
RED or BROWN ............................................................ LIVE ( L )
BLACK or BLUE ............................................................ NEUTRAL ( N )
GREEN / YELLOW or YELLOW / GREEN .................... EARTH ( )
d. Replace the connector cover and tighten the screws.
Schematic Wiring Diagram
Thermal
Cut-out
Thermostat
Terminal Block
L
N
E
L
N
E
Main Supply
240V
Heating Element
‘Heating’
Bulb
(Red)
‘Power’ Bulb
(Green)
To Heater Chasis
TECHNICAL SPECIFICATIONS
Electrical Loading
: 3.0 kW 240V ~ 50/60 Hz
Working Pressure
: min. 0.02 MPa (0.2 bar)
max. 0.8 MPa (8.0 bar)
Water Connection
: 15mm dia. (1/2” BSP)
Water Temperature Control : Thermostatically Controlled at 25
o
C-75
o
C,
Safety Cut-Out at 93
o
C
Insulation Material
: CFC-Free Polyurethane Foam
Outer Casing Material
: Epoxy Coated Mild Steel
Inner Tank Material
: Blue Diamond Enamel Coated Mild Steel
Water Proof Protection
: IPX4
Dimension
Model
A
B
C
D
E
AST-30-H
AST-40-H
Tank
Capacity
(Litre)
Approx.
Weight (kgs)
Empty Full
Dimension (mm)
F
AST-50-H
AST-60-H
AST-70-H
AST-80-H
AST-90-H
30
40
50
60
70
80
90
540
640
740
860
970
970
1055
165
280
280
500
500
400
400
φ
380
φ
380
φ
380
φ
380
φ
380
φ
410
φ
410
210
210
210
210
210
210
210
420
420
420
420
420
450
450
15
17.5
19
22
23.5
25
27
45
57.5
69
82
93.5
105
117
620
720
820
940
1050
1050
1135
A
B
C
D
E
100
F
11
