Remote Leaving Chilled Liquid Setpoint; Figure 17 - Remote Leaving Chilled Liquid Temp. Setpoint With 0-10Vdc Signal; Figure 18 - Remote Leaving Chilled Liquid Temp. Setpoint With 4-20Ma Signal - York YZ Wiring Diagrams

SECTION 1 - FIELD CONTROL MODIFICATIONS
REMOTE LEAVING CHILLED LIQUID
SETPOINT
Remote Leaving Chilled Liquid Temperature Setpoint
Reset can be accomplished by a BAS when an SC-EQ
communication card is installed or by a hard-wired an-
alog 0-10VDC, 4-20mA or digital 1-11 second PWM
signal (supplied by others). The OptiView™ Control
Center must be configured appropriately to accept the
desired signal in the Remote Control Screen (Home
>Setpoints>Remote).
The Leaving Chilled Liquid Temperature Setpoint
is programmable over the range of 36°F to 72°F (2.2°C
to 22°C) (water applications) or 10°F to 72°F (-12.2°C
to 22°C) (brine applications). The Remote Input Sig-
nal Min and Max are user definable to allow complete
flexibility for the BAS controls.
0-10VDC - If the Remote Setpoint Min is set to 0
and the Max to 100 then the control signal will set
the setpoint for 0-10VDC 0.1VDC = 1°F (If the BAS
wants a 42 degree setpoint, they should send a 4.2VDC
signal).
If the Remote Setpoint Min is set to 36 and the Max
to 46 then the control signal will set the setpoint for
0-10VDC 1.0VDC = 1°F (If the BAS wants a 42 de-
gree setpoint, they should send a 6.0VDC signal).
Note that this reduced range gives more resolution to
the setpoint and is similar to the previous way the Tem-
perature Setpoint Reset was performed.
As shown in Figure 17 on page 14, connect input
to Microboard J22-3 (signal) and J22-5 (GND). The
Microboard Program Jumper JP24 must be removed
for this.
Signal
+
Common
_
FIGURE 17 - REMOTE LEAVING CHILLED LIQUID
TEMP. SETPOINT WITH 0-10VDC SIGNAL
14
J22
3
5
LD04500
4-20mA - If the Remote Setpoint Min is set to 0 and the
Max to 100 then the control signal will set the setpoint
or 4-20mA 0.16mA = 1°F (If the BAS wants a 42 de-
gree setpoint they should send a 6.7mA signal).
If the Remote Setpoint Min is set to 36 and the Max
to 46 then the control signal will set the setpoint for
4-20mA 1.6mA = 1°F (If the BAS wants a 42 degree
setpoint they should send a 9.6mA signal)
Note that this reduced range gives more resolution
to the setpoint and is similar to the previous way the
Temperature Setpoint Reset was performed.
As shown in Figure 18 on page 14, connect input
to Microboard J22-4 (signal) and J22-5 (GND.). The
Microboard Program Jumper JP24 must be installed on
pins 1 and 2 for this setting.
Signal
+
Common
_
FIGURE 18 - REMOTE LEAVING CHILLED LIQUID
TEMP. SETPOINT WITH 4-20MA SIGNAL
PWM - The Pulse Width Modulation input is in the
form of a 1 to 11 second relay contact closure that ap-
plies 115VAC to the I/O Board TB3-19 for 1-11 sec-
onds. As shown in Figure 19 on page 15, connect
dry closure relay contacts between I/O Board TB3-19
(input) and TB3-1 (115VAC).
The relay contacts should close for 1 to 11 seconds at
least once every 30 minutes to maintain the setpoint
to the desired value. If a 1 to 11 second closure is not
received within 30 minutes of the last closure, the Lo-
cal Cooling Setpoint. A one second signal will set the
setpoint to the Remote Setpoint Minimum value. An
11 second signal will set the setpoint to the Remote
Setpoint Maximum value.
• If the Remote Setpoint Min is set to 0 and the Max
to 100, then the control signal will set the setpoint
for 1-11s 0.1s = 1°F above the min (If the BAS
wants a 42 degree setpoint they should send a 5.2
seconds signal).
FORM 161.01-PW2
ISSUE DATE: 7/18/2018
J22
4
5
LD04501
JOHNSON CONTROLS