York J Series - Field Wiring and Control Connections

FORM 100.50-NOM7 (808)
9
JOHNSON CONTROLS
1
GENERAL
The OptiLogic
TM
control center is a fully-integrated fac-
tory-packaged control and includes a display unit with
a 4x20 character LCD display. OptiLogic
TM
continually
monitors all control setpoints and congurations. If a
unit or control component or sensor fails, the controller
noties the user of a problem. If desired, YORK ser-
vice can provide remote monitoring and automatically
schedule a service technician to make the repair and
maintain your comfort.
All control points within the unit are factory-installed,
wired and tested. The OptiLogic
TM
controls can com-
municate with BACNet IP or MSTP, or Lonworks (see
UPG M letter M-84-2007).
A eld installed optional lter maintenance alarm indi-
cates when a lter becomes dirty and requires replace-
ment or cleaning.
FIELD WIRING
Figure 1 shows the eld control wiring to CTB3 for both
a Constant Volume and Variable Air Volume units. All
eld control wiring is eld supplied and installed.
Thermostat
The thermostat (if used) can be used for either CV or
VAV units. When used, the thermostat is the primary
means of control for the unit. The thermostat should be
mounted on an inside wall approximately 56" above the
oor where it will not be subject to drafts, sun exposure
or heat from electrical xtures or appliances.
Space Sensor
The space sensor (if used) can be used on either CV or
VAV units. The space sensor can be used for unit control
in lieu of a thermostat. Even if a thermostat is wired
to the rooftop unit, the space sensor will supply space
air temperature values if connected. When mounting
a space sensor, it should be located on an inside wall
approximately 56" above the oor where it will not be
subject to drafts, sun exposure or heat from electrical
xtures or appliances. Shielded Wire must be used
that is grounded at control panel only.
Note that 24 volts (R), terminal 16, must be used as the
24 volt AC source for switching the contact to the unit
controller shutdown input. Use of any power source
SECTION 1 – INSTALLATION
external to the controller will result in damage to the
unit controller.
CO
2
Sensor
The optional CO
2
sensor is used for demand ventilation
and must be wired to the eld control wiring terminal
block using three-conductor shield wire. Shielded wire,
grounded at the control box only, must be used.
Occupied/Unoccupied Input
A contact-closure input is provided for hard-wiring an
external device such as a central time clock, a thermostat
with scheduling or BAS system, or a manual switch.
Contact Closure = Occupied
Contacts Open = Unoccupied
Note that 24 volts (R), terminal 16, must be used as
the 24 volt AC source for switching the contact to the
unit controller Occupied/Unoccupied input. Use of any
power source external to the controller will result in
damage to the unit controller.
Shutdown Input
A contact-closure input is provided for emergency
shutdown of the unit. When a contact closure to this
input, the unit shuts down with supply fan, exhaust fan
turned o, and outside air dampers are closed. This
state is maintained until the input is deactivated (con-
tacts open).
Contact Closed = Shutdown
Contacts Open = Normal Operation
Note that 24 volts (R), terminal 16, must be used as the
24 volt AC source for switching the contact to the unit
controller shutdown input. Use of any power source
external to the controller will result in damage to the
unit controller.
Smoke Purge Input
A contact-closure input is provided for a smoke purge
sequence. When a contact-closure occurs at this input,
one of ve purge sequences will be initiated, depending
on unit programming. This input will cause a specic
operation of supply fan, exhaust fans, return dampers,
outside air dampers, and exhaust dampers. The ve
possible smoke purge modes (Shutdown, Pressurization,
Exhaust, Purge, and Purge with Duct Pressure Control)
are described in the controls section of this manual.