Installation guide

1BHFt%3*45&&.7BQPSMPHJD 3 Installation and Operation Manual
Main control board connections,
continued
J22 Wire terminal connection allows for remote fault indication
via isolated relay contacts (1 amp max.). Terminal 10 is
the isolated common connection; terminal 9 provides the
normally closed connection, and terminal 11 provides the
normally open connection.
J23 Wire terminal connection provides optically isolated input
connections for the airflow proving switch and safety
interlock circuit. Terminal 12 supplies 24 VAC to the
airflow proving switch (single pole, single throw [SPST]),
which closes when airflow is present. Terminal 13 is the
return connection from the switch into the Vapor-logic
3
controller. Terminal 14 supplies 24 VAC to the safety
interlock circuit (SPST), which is closed under normal
operating conditions. Terminal 15 is the return connection
from the safety circuit into the Vapor-logic
3 controller. The
humidifier is disabled when the safety interlock circuit is
open.
J25 Wire terminal connector provides input for the tank
temperature sensor. The sensor is connected between
terminals 19 and 20. Terminal 18 supplies 21 VDC and is
not used.
J26 Wire terminal connector reads the analog input signal from
the controlling RH sensor or external demand source.
t 5FSNJOBM1PTJUJWFQPMBSJUZ7%$TVQQMZN"
max.)
t 5FSNJOBM$POUSPMTJHOBMJOQVU
t 5FSNJOBM4JHOBMHSPVOE
t *OQVUTFMFDUPSQJO++DPOGJHVSFT+JOQVU
J27 Wire terminal connector reads the analog input signal from
the duct high limit RH sensor.
t 5FSNJOBM1PTJUJWFQPMBSJUZ7%$TVQQMZN"
max.)
t 5FSNJOBM$POUSPMTJHOBMJOQVU
t 5FSNJOBM4JHOBMHSPVOE
t *OQVUTFMFDUPSQJO++DPOGJHVSFT+JOQVU
J28 Wire terminal connector reads the analog input signal from
the window temperature sensor.
t 5FSNJOBM1PTJUJWFQPMBSJUZ7%$TVQQMZN"
max.)
t 5FSNJOBM$POUSPMTJHOBMJOQVU
t 5FSNJOBM4JHOBMHSPVOE
t *OQVUTFMFDUPSQJO++DPOGJHVSFT+JOQVU
VL3_IOM.pdf 18 11/19/2009 9:11:06 AM