York OPTIVIEW YK Service Manual

238
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 28 - HEAT RECOVERY
JCI COMPANY CONFIDENTIAL JOHNSON CONTROLS
Setpoints
• Hot Water Control setpoint – (Extended temp
range equals 65.0°F to 125.0°F; default 95.0)
(Standard temp range equals 65.0°F to 112°F;
default 95.0) Sets the temperature that the Leav-
ing Heating Condenser Water Temperature will
be controlled to Displayed as Active Hot Water
setpoint.
FIGURE 92 - HEAT RECOVERY BLOCK DIAGRAM
MICROBOARD
031-02430-000
031-02430-001
I/O
BOARD
031-02895-000
HEATING CONDENSER
FLOW SWITCH -
THERMAL TYPE
LEAVING HEATING
CONDENSER WATER
THERMISTOR
RETURN HEATING
CONDENSER WATER
THERMISTOR
REMOTE HOT WATER
SETPOINT
0-10VDC or 4-20mA
HEATING CONDENSER
WATER FLOW SWITCH
120VAC
NOTE 2
NOTE 2
NOTES:
1. If Head Pressure Control is ENABLED and Hot Water Control is DISABLED or if Hot Water Control is ENABLED
but there is NO water flow in the heating condenser, valve control will automatically switch over to the Head Pressure Control.
2. The chiller could be equipped with either paddle/differential pressure (120VAC) type or Thermal Type (+5VDC) flow
switches. Each Type must be connected as shown.
HEAT RECOVERY
CONTROL VALVE
0-10VDC or 4-20mA
NOTE 1
OUT +5V
RS-485
COM 3
J14
J12
2
3
10 11
J9
4/12
3/11
(-)
(+)
TB2
VALVE
POSITIONING
2
3
AO2
GND
TB9
3
4
AI8
GND
TB20
1
2
DI1+
DI1-
J10
2
1
AI1
5VDC
5
4
AI2
5VDC
HOT GAS BYPASS
CONTROL VALVE
0-10VDC
TB1
2
3
AO1
GND
LD14238

York OPTIVIEW YK Specifications

General

Brand	York
Model	OPTIVIEW YK
Category	Controller
Language	English