York YVAA Style A - Customer Control Wiring Diagram; Control Connections Overview

JOHNSON CONTROLS
48
SECTION 4 - INSTALLATION
Form 201.28-NM1.1
Issue date: 08/06/2021
Figure 17 - Customer control connections
SYS. No. 1
ALARM
CONTACTS
SYS. No. 2
ALARM
CONTACTS
CHILLER
RUN
EVAP. PUMP
START
SIGNAL
SYS. No. 1 RUN PERM
SYS. No. 2 RUN PERM
FLOW SWITCH (-SF)
PRINT (PNT)
LEGEND
TERMINAL BLOCK FOR CUSTOMER CONNECTIONS
TERMINAL BLOCK FOR YORK CONNECTIONS
WIRING AND COMPONENTS BY YORK
OPTIONAL EQUIPMENT
WIRING AND/OR COMPONENTS BY OTHERS
RELAY
BOARD
No. 2
RELAY
BOARD
No. 1
CONTROL
BOARD
Customer control wiring
In subfreezing regions, failure to connect EVAP. PUMP START SIGNAL from terminal 23 and ter-
minal 24 to chilled water pump starter will void warranty, except when the water in the evaporator is
fully dried or appropriate concentration of glycol is reached in the water system.