SYX66x Commissioning Guide
V1.10.3 300117
Page 23 of 61
Connections
0-10v output
The controller offers a 0-10v
output and you can chose its
purpose.
(Boiler set point can be scaled
to suit the boiler being used
by setting the range required
over the signal)
VT Valve (Default) 0-100% - For direct 0-10v
control of the VT valve. (The Open Close
Signals from the relays are not affected)
Boiler Setp (Scalable) (e.g. 0-10v = 0 to 82
’C
see your boiler manufacturers manual)
Boiler Demand (0-100%)
– can be connected
to boiler(s) or step controller like BRPO range.
Note: 0v = 0%, 10v = 100%
Boiler 1 Output will be enabled if Boiler Setp is
selected and there is a boiler demand active.
This can be used as an enable as required
PMPCO Used
The PMPCO modules need
the pump enable to be
switched off for 4 seconds to
rotate the pumps. You can
select this to occur never,
daily or weekly. This is only
required
when
using
Day/Night setback mode as
the pumps would typically not
turn off unless high temps are
seen.
Not Used = Default
Daily Change
Weekly Change
