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DN-Series Integrated Programmable Controls
DOAS
TEMPERING CONTROL
6.3.3 Heating Control Types
The following heating types are supported:
u
0–10VDC: Gas or Electric
u
10–0VDC: Hot Water Valve
u
HP 1 Stage: with or without 0–10VDC aux heat—See
Combined Tempering
u
HP 2 Stage: with or without 0–10VDC aux heat—See
Combined Tempering
u
Dual Temp Coil: A coil that is used for both hot and cold water, depending upon season—
See
Combined Tempering
u
VRF—See
Combined Tempering
u
VRF and Mod: VRF with 0–10VDC Aux Heat—See
Combined Tempering
The heating type is either set in the Unit Configuration or at the top of this screen.
6.3.3.1 0–10VDC Gas or Electric Heating
The mode is determined by the outdoor temperature and the heating lockout
temperature settings.
This type of heating will modulate gas or electric heat 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 1% or higher.
A unit-specific electrical schematic is found inside the access door to the core module.
The heating status can be monitored in the
Unit Status
. The screen shows:
u
Heating Control Variable which will be:
u
as selected if in occupied operation
u
RA for unoccupied operation
u
CA in dehumidification mode and heating is used for reheat
u
Heating setpoint which will be:
u
Occupied heating setpoint if selected adjust and in occupied operation
u
Calculated OA reset heating setpoint if selected OA reset and in occupied operation
u
Unoccupied heating setpoint if unoccupied operation
u
Reheat setpoint if dehumidification mode and heating is used for reheat
u
Whether heating enable 1 is ON
