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Premium Commercial Controls
ERV
40
The heating status values are shown. Multiple values may be true.
MESSAGE
MEANING
Heat Locked Out by OA
The heating outdoor air lockout is higher than the OA temperature.
Unit OFF
Unit is off.
6.2.3.2 10–0VDC Hot Water Valve
The mode is determined by the outdoor temperature and the heating lockout
temperature settings.
TEMPERING CONTROL
The hot water valve control is 10VDC for closed and 0VDC for open so that it fails open. This
type of heating will modulate using PI control. The KP and Ti can be adjusted to fine tune
the control. The setpoint is also set here if set for Adjust. The NO1 heating enable contact is
engaged whenever the heating output is at 99% or lower.
NOTE: The valve
control can be set
directly from the
BMS if you change Valve
control to BMS. In this
case all Heating Control
settings from the control-
ler will be ignored.
The heating status can be monitored in the
Unit Status
. The screen shows:
u
Heating Control Variable which will be as selected if in occupied operation
u
Heating setpoint which will be:
u
Heating setpoint if selected adjust
u
Calculated OA reset heating setpoint if selected OA reset
u
Whether heating enable 1 is ON
u
Command (0–100%) to Heater, where 0 = 10VDC output and 100% = 0VDC.
u
Heating Status
