46 CNT-SVX17G-EN
Sequence of Operations
Hydronic heat is enabled if there is no valid primary air temperature. Hydronic heat is
disabled if the primary air temperature is greater than the configured reheat enable
setpoint.
Figure 1 shows the primary air temperature status determination.
Air temperature Primary air temperature Configurable points
Hot
Cold
Hot
Warm
Primary air temperature
hysteresis region. No
change in primary air
temperature status.
Cold
Configured reheat enable
setpoint
Configured auto changeover
setpoint
Configured auto changeover
setpoint minus 10°F
Note: For hydronic heat, set the configured reheat enable
setpoint to a very high value so that it does not affect
hydronic heat operation
Figure 1. Primary air temperature status determination
For hydronic heat, the reheat enable setpoint is able to be configured. The hydronic heat
range i
s 70°F to 200°F (21.11°C to 93.33°C). When the primary air temperature is greater
than the configured reheat enable setpoint, reheat is turned OFF until the primary air
temperature drops 5°F (2.78°C) below the configured reheat enable setpoint. When no
primary air temperature is available, the controller checks the configured default primary
air temperature to determine if reheat can operate.
On/Off hydronic heat
The controller supports up to three stages of ON/OFF hy
dronic he
at with no fan and two
stages with a fan (series or parallel). For more information on actuation, refer to
“Appendix D: Reheat Actuation Schedule Tables” on page 97.
To Next Page
Loading...
Need help?
General
