102
106308-05 - 3/23
APEX Installation, Operating, & Service Instructions
Parameter and Description Factory Setting Range / Choices
Fan Speed-Up Ramp
Maximum fan ramp rate when fan speed is increasing.
0 0 to 12,000 rpm
Fan Speed-Down Ramp
Maximum fan ramp rate when fan speed is decreasing.
0 0 to 12,000 rpm
Fan Gain Up
Fan gain when fan speed is increasing.
15 1 to 100
Fan Gain Down
Fan gain when fan speed is decreasing.
5 1 to 100
CH Slow Start Enable/Disable
Enables or disables the slow start limit function for Central Heat and Sequence
Master demand sources. Uses the CH Low Fire Hold Rate parameter as the starting
point for the slow start.
Disabled
Enable
Disable
DHW Slow Start Enable/Disable
Enables or disables the slow start limit function for DHW demand source. Uses the
DHW Low Fire Hold Rate parameter as the starting point for the slow start.
Disabled
Enable
Disable
Slow Start Degrees
If Slow Start is enabled and supply temperature is less than setpoint minus Slow
Start Degrees, then slow start rate limiting is effective. Slow start rate limiting has no
effect when supply temperature is greater than setpoint minus Slow Start Degrees.
20°F
(11°C)
0 to 180°F
(0 to 82.2°C)
Slow Start Ramp
When slow start rate limiting is in effect, the modulation rate will increase no more
than the amount per minute given by this parameter. Although provided as a per-
minute value, the Control will calculate and apply this as a stepped function using
step duration of 10 seconds.
200 % / min. 0 to 1,000 rpm
Select to access the following parameters.
Select to access the following parameters.
Parameter and Description Factory Setting Range / Choices
Sequencer On/Off
Turns control internal sequencer on or off.
On
On
Off
10 Operation (continued)
To Next Page
Loading...
