L.B. White COMBO-MCS - Manual (Page 18)

This conditioner receives 24 VAC from the upper
transformer in the SmartBox
™
, in addition to a
4-20 mA input signal from the programmable
controller.
The conditioner then sends control signal of 0-15
VDC to the zone control panel’s variable rate
solenoid valve for operation, based upon the 4-20
m A s i g n a l s u p p l i e d f ro m t h e p ro g r a m m a b l e
controller.
See Fig.47 for reference to terminals on the
conditioner when checking voltage and connection
of wiring.
FIG.47
RADIANT SIGNAL CONDITIONER
24 VAC INPUT
FROM UPPER
TRANSFORMER
0-15 VDC OUTPUT TO THE
PROPORTIONAL GAS
SOLENOID VALVE
4-20 mA INPUT
FROM CONTROLLER
18
GROUND
NOT USED