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FITTING THE SCT007 (CONT.)
E
Mains
L
Supply
N
SCT007 wired to control a cooling load.
When necessary the SCT007 should be used in conjunction with a contactor.
N L
N
MAINS
L
SUPPLY
E
SCT007 controlling a secondary heating zone on a fully pumped system with
existing programmer and two spring return valves with auxiliary switches.
MAINS
SUPPLY
SCT007 replacing a conventional room thermostat on a fully pumped system
with an existing programmer and 3 port mid-position valve.
Programmer
HOT
CENTRAL
WATER
HEATING
OFF
ON
ON
C
N
C
CYL
STAT
CALL
SAT
CALL
SAT
Programmer
HOT
WATER
N L
ON
N
L
E
CALL
W
BL
0
GR
SCT007
1
2
3
N
L
COOLING LOAD
OFF
SCT007
ROOM
STAT
1
ROOM
N
STAT
MAINS
L
SUPPLY
E
CENTRAL
HEATING
OFF
OFF
ON
SCT007
C
4
CYL
1
STAT
2
3
SAT
CALL
SAT
N
L
PUMP
&
BOILER
4
2
3
4
N
PUMP
&
L
BOILER
5
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