Trane IntelliPak with Symbio 800 - Page 36

36 RT-SVP011E-EN
TD7 Display
Heat Turn Down Limited Manf 1
Flame loss at low fire results in an auto-adjustment that limits the
b u r n e r tu r n d ow n d u ri n g t h e r e s t of t h e cu r r e nt c a ll f o r h e at ( d u e t o L os t
Flame Auto-Adaptation).
Modulating Gas Heat only.
Idle
VVZT, CVZT Units: Occupied/Bypass/Standby, Heat Cool Mode = Heat
o
r Co
ol, supply fan mode is cycling, capacity is 0%, and supply fan is off.
VVDA, CVDA Units: Auto operation has been requested but the fan is
off due to internal fan-off
delays, or the fan has started, but airflow has
not yet proven.
Table 8. Unit operation - top level mode - running
Unit Description
Top Level Mode
Running
The unit’s supply fan is proven and running. Capacity
control c
an be active or inactive.
Running Sub Modes Description
Cool
DX or economizer cooling is active, Heat Cool Mode Status
= C
ool
Cool - Dehumidific
ation
Heat Cool Mode Status = Cool and Dehumidification
Control St
atus > 0%.
Cool – Economizing Cooling Capacity Status = 0%
Heat Cool Mode Status = Cool, Economizer System Status
= T
rue, Outd
oor Air Damper > minimum position setpoint
or OA flow position setpoint.
Cool - Economizing + DX Cooling Capacity Status > 0%
Heat Cool Mode Status = Cool, Economizer System Status
= True, Outd
oor Air Damper > minimum position setpoint
or flow position setpoint.
Cool - Tempering VVDA/CVDA units
Heat Cool Mode Status = Cool and Supply Air Tempering
Status = T
rue
Daytime Warm up VVDA/CVDA units
Daytime Warmup is active. Daytime Warmup Active =
T
rue;
Heat Cool Mode Status = Heat or Max Heat; Heat Cool
Mode Request = Cool
Demand Control Ventilation (DCV)
Supply fan proven On, Feature Installed/Enabled,
CO2 <
Design CO2 Setpoint, Not actively in an Economizing mode.
Demand Limit
Demand Limit Request BAS is set to true and the unit is
actively h
olding or unloading heating or cooling staging to
meet Demand Limit requirements
Emergency Override Mode X
Emergency Override Mode is active. Where X = Pressurize,
Depressur
ize, Purge, Shutdown, or Fire
External Relief Fan Control External control of the relief fan is active.
External Supply Fan Control External control of the supply fan is active.
Fan Only
Only a sub mode when commanded via Heat Cool Mode
Request
= Fan Only. Heat Cool Mode Status = Fan Only
Heat Heat Cool Mode Request = Heat
Morning Warmup Active = False
Max Heat Heat Cool Mode Request = Max Heat
Table 7. Unit operation - top level mode - auto (continued)
Unit Description