Nordic ATWC Series, Инструкция по установке и обслуживанию, Страница: 101 / 106

PRELIMINARY: 24-Sep-2021 Page 101 002536MAN-00
TABLE A4 - Control Board Connector Descriptions (Right Side)
Name Description
DI_1 Digital Input1 Unused.
DI_0 Digital Input0 Unused.
PM2 Phase Monitor2 Switch or dry contact from R to activate Summer Setback mode.
PM1 Phase Monitor1 Unused.
Y2A Aquastat Stage2 Unused.
RA* Aquastat Power (24VAC) Optional 24VAC power supply for aquastat used with Signals/Hardwired control.
Y1A* Aquastat Stage1 Optional stage 1 24VAC input for use with Signals/Hardwired control.
CA* Aquastat Power (Ground) Optional 24VAC ground for aquastat used with Signals/Hardwired control.
2 Stage 2 alarm Dry contact to indicate R134a circuit alarm, used with C
1 Stage 1 alarm Dry contact to indicate R410a circuit alarm, used with C
C Alarm Common Used with 2 and 1 above.
AR Airflow Reductions Unused.
24VAC Power 24VAC to indoor flow switch.
ODFLO Outdoor Flow Switch Unused.
IDFLO Indoor Flow Switch Return signal from indoor loop flow switch.
L Thermostat Lockout Indicator 24VAC output for trouble LED
E Thermostat Emergency Heat Unused.
O Thermostat Heat/Cool 24VAC input from external dry contact via terminal strip; activates cooling mode.
W2 Thermostat Auxiliary Heat Unused.
Y2 Thermostat Stage2 Unused.
Y1 Thermostat Stage1 Unused.
G Thermostat Fan Recirculation Unused.
R Thermostat Power (24VAC) Unused.
C Thermostat Power (Ground) Unused.
*NOTE: There is no need for an external aquastat for most systems, since the Setpoint Control Method provides built in aquastat
functionality.