York International ZQ Series Installation Manual page 60

Table 51: Smart Equipment™ UCB - refrigerant circuit safety switch and indoor blower overload
connections
Location Label
HPS1
24 VAC hot out for refrigerant circuit 1 High Pressure Switch
(right pin)
24 VAC hot return from refrigerant circuit 1 High Pressure
HPS1
(left pin)
Switch
LPS1
24 VAC hot out for refrigerant circuit 1 Low Pressure Switch
(right pin)
24 VAC hot return from refrigerant circuit 1 Low Pressure
LPS1
(left pin)
Switch
HPS2
24 VAC hot out for refrigerant circuit 2 High Pressure Switch
(right pin)
24 VAC hot return from refrigerant circuit 2 High Pressure
HPS2
J
(left pin)
Switch
LPS2
24 VAC hot out for refrigerant circuit 2 Low Pressure Switch
(right pin)
24 VAC hot return from refrigerant circuit 2 Low Pressure
LPS2
(left pin)
Switch
24 VAC hot out for indoor blower FAN Overload relay contact/
FAN OVR
(right pin)
motor protector switch
24 VAC hot return from indoor blower FAN Overload relay
FAN OVR
(left pin)
contact/motor protector switch
Table 52: Smart Equipment™ UCB - SA BUS connections
Location Label
PWR Power for SA ("Sensor-Actuator") BUS devices
C Common for SA BUS power and communication circuits
K
– Communication for SA BUS devices
+ Communication for SA BUS devices
L J8 6-pin phone jack connector
1 When wiring unit and other devices using the SA Bus and FC Bus, see Cable recommendations.
Table 53: Smart Equipment™ UCB - user interface
Location Label
Display On-board, 2-line x 8-character back-lit display
ENTER Button for display menu acknowledgment and navigation
M
Button for display menu navigation and zeroing of active compressor
CANCEL
ASCD timer
JOY 4-way Joystick for display menu navigation
60 INSTALLATION MANUAL ZQ SERIES 3 - 5 ton 60 Hertz R-410A
Description
Description
Also incorporated in the J8 6-pin phone jack connector at the left-center of the board.
Positive of the 15 VDC (reading to C) circuit for powering an optional netstat and/or Multi
Touch gateway
Also incorporated in the J8 6-pin phone jack connector at the left-center of the board.
Negative of the SA BUS circuits
Also incorporated in the J8 6-pin phone jack connector at the left-center of the board.
Positive of the VDC (typically, a fluctuating 1.5 to 3.5 V reading to C; at least 0.25 V lower
than +) SA BUS communication circuit to optional economizer board, 4-stage board, fault
detection and diagnostics board, netstat and/or Multi Touch gateway
Also incorporated in the J8 6-pin phone jack connector at the left-center of the board.
Positive of the VDC (typically, a fluctuating 1.5 to 3.5 V reading to C; at least 0.25 V higher
than –) SA BUS communication circuit to optional economizer board, 4-stage board, fault
detection and diagnostics board, netstat and/or Multi Touch gateway
Incorporates the SA BUS terminals for convenience/alternate connection of SA BUS devices,
primarily used for temporary service connection of the Multi Touch gateway
Description
Johnson Controls Ducted Systems
Function and comments
Connects through circuit trace to the R terminal
Input is only considered if C1 output is needed; input must be present to allow
C1 output. Three HPS1 trips in a two hour period cause a "High Pressure Switch 1
Lockout" and C1 output is then prevented until alarm reset. Connects through circuit
trace to the right LPS1 pin.
Connects through circuit trace to the left HSP1 pin
Input is only considered after 30 seconds of C1 output; afterwards, input must be
present to allow C1 output. Three LPS1 trips in a one hour period cause a "Low
Pressure Switch 1 Lockout" and C1 output is then prevented until alarm reset.
Not effective for one stage compressor UCBs. Connects through circuit trace to the R
terminal
Not effective for one stage compressor UCBs. Input is only considered if C2 output
is needed; input must be present to allow C1 output. Three HPS2 trips in a two hour
period cause a "High Pressure Switch 1 Lockout" and C2 output is then prevented
until alarm reset. Connects through circuit trace to the right LPS2 pin.
Not effective for one stage compressor UCBs. Connects through circuit trace to the
left HSP2 pin
Not effective for one stage compressor UCBs. Input is only considered after 30
seconds of C2 output; afterwards, input must be present to allow C2 output. Three
LPS2 trips in a one hour period cause a "Low Pressure Switch 2 Lockout" and C2
output is then prevented until alarm reset.
Connects through circuit trace to the R terminal
Input is only considered if FAN output is needed; input must be present to allow
FAN output and unit operation. One FAN OVR trip lasting longer than 5 minutes or
three FAN OVR trips in a two hour period cause a "Fan Overload Lockout" and unit
operation is then prevented until alarm reset.
1
Function and comments
Function and comments
On-board display, buttons and joystick allow access to UCB, economizer, 4-
stage and FDD board parameters