208
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 22 - REMOTE SETPOINTS
JCI COMPANY CONFIDENTIAL
JOHNSON CONTROLS
uid Temperature setpoint. These two setpoints share a
single remote input that resets the appropriate setpoint
based on the Heat Pump Operational Mode. When in
Cooling Mode, the signal on this input sets the Leaving
Chilled Liquid Temperature setpoint. When in Heating
Mode, this signal sets the Leaving Condenser Liquid
Temperature setpoint.
The Cooling Mode remote reset of the Leaving Chilled
Liquid Temperature setpoint is explained under “Leav-
ing Chilled Liquid Temperature” above.
The Heating Mode remote reset of the Leaving Con-
denser Liquid Temperature setpoint can be accom-
plished by supplying (by others) a 0 to 10 VDC, 2
to 10 VDC, 0 to 20mA, 4 to 20mA or a Pulse Width
modulated (PWM) signal to the same inputs as used
for the Leaving Chilled Liquid Temperature setpoint
inputs as explained above. The Leaving Condenser
Liquid Temperature setpoint is programmable over the
range of 65°F to 122°F. The remote input signal chang-
es the setpoint by creating an offset “below” the lo-
cally programmed Leaving Condenser Liquid setpoint
value. The setpoint can be remotely changed over the
range of the value programmed for the Leaving Con-
denser Liquid Remote Reset Temperature Range (10,
20, 30, or 40°F). The remote setpoint received through
the COM4B RS-232 serial port is not an offset that
is applied to the Local Setpoint. Rather, it’s an actual
setpoint value.
The OptiView Control Center must be configured ap-
propriately to accept the desired signal type as follows:
• The appropriate Remote Mode must be selected:
1. Analog Remote Mode must be selected when
using a voltage or current signal input.
2. Digital Remote Mode must be selected when
using a PWM input. ISN must be selected
when using a serial communications input.
• If Analog Remote Mode is selected, the Remote
Analog Input Range setpoint must be set to 0 to 10
VDC or 2 to 10 VDC as detailed below, regardless
of the whether the signal is a voltage or current
signal type.
• The Remote Reset Temperature Range in the fol-
lowing descriptions is the Leaving Condenser Re-
mote Reset Range.
0 to 10 VDC
As shown in
, the input is con-
nected to Microboard J22-3 (signal) and J22-5 (GND).
A 0 VDC signal produces a 0 VDC offset. A 10 VDC
signal produces the maximum offset below the Local
Setpoint value (as allowed by the Remote Reset Tem-
perature Range setpoint). Select Analog Remote Mode.
The Remote Analog Input Range setpoint must be set
to 0 to 10 VDC and Microboard JP24 must be removed.
The setpoint is calculated as follows:
Offset (°F) = ( VDC)(Remote Reset Temp Range)
10
Setpoint (°F) = Local Setpoint – Offset
2 to 10 VDC
As shown in
, the input is con-
nected to Microboard J22-3 (signal) and J2-5 (GND).
A 2 VDC signal produces a 0°F offset. A 10 VDC sig-
nal produces the maximum allowed offset below the
Local setpoint value (as allowed by the Remote Reset
Temperature Range setpoint). Select Analog Remote
Mode. The Remote Analog Input Range setpoint must
be set to 2 to 10 VDC and Microboard JP24 must be
removed. The setpoint is calculated as follows:
Offset (°F) = ( VDC-2)(Remote Reset Temp Range
8
Setpoint (°F) = Local Setpoint – Offset
0 to 20mA
As shown in
, the input is con-
nected to Microboard J22-4 (signal) and J22-5 (GND).
A 0mA signal produces a 0°F offset. A 20mA signal
produces the maximum allowed offset below the Local
setpoint value (as allowed by the Remote Reset Tem-
perature Range setpoint). Select Analog Remote Mode.
The Remote Analog Input Range setpoint must be set
to 0 to 10 VDC and Microboard JP24 must be placed
on pins 1 and 2. The setpoint is calculated as follows:
Offset (°F) = (mA)(Remote Reset Temp Range)
20
Setpoint (°F) = Local Setpoint – Offset
4 to 20mA
As shown in
, the input is con-
nected to Microboard J22-4 (signal) and J22-5 (GND).
A 4mA signal produces a 0°F offset. A 20mA signal
produces the maximum allowed offset below the Local
Setpoint value (as allowed by the Remote Reset Tem-
