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1
2
THERMOSTAT 1 SWITCH
BROWN
BLUE
GREEN / YELLOW
HEATER 1
THERMOSTAT 1
HEATER 2
2
SWITCH
1
N
L1
ULTRA 7/3.5, 14/7, 21/10.5, 28/14 & 42/21 Hi/Lo
SINGLE HEATER PER THEMOSTAT.
MULTIPLE HEATERS PER THEMOSTAT.
GREEN / YELLOW
N
L1
BLUE
BROWN
SWITCH
SWITCH
THERMOSTAT 1
THERMOSTAT 2 SWITCH
3
SWITCH
THERMOSTAT 2
3
BLACK
L2
L2
THERMOSTAT 2
BLACK
HEATER 1
3
2
1
3
2
1
HEATER 2
SWITCH
SWITCH
Fig. 4.
Notes:
The method of connection to the electrical supply must facilitate complete isolation and should preferably be via a
fused double pole isolator having a constant separation of at least 3mm in all poles and supplying the appliance
ONLY.
Alternatively connections may be made via a 3 pin plug and unswitched socket, both complying with the
requirements of National or Local Regulations. Neither thermostat nor switches are supplied as standard
equipment.
N.B. In the event of an electrical fault after installation of the appliance, preliminary system checks are required to
be carried out, i.e. earth continuity, polarity and resistance to earth.
3.3.4
Internal Wiring Diagram
1
2
3
4
5
6
7
8
9
10
11
12
1 2
3
1 2
3
BR
BL
G/
Y
BK
L N
BL
BK
BR
G/Y
Y
WIRING COLOUR CODES
BK = BLACK
BL = BLUE
BR = BROWN
G/Y = GREEN & YELLOW
Y = YELLOW
4 PIN SOCKET
& PLUG BASE
CONTROL
VALVE
VENTURI
ULTRA 7, 14, 21, 28 & 42
G/Y
Fig 5.
Содержание Ultra 14
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