User Manual

CHS Series Controller and Display │Slant Fin Corp.
7
2.3.1 Forced Rate
Figure 2-5 Forced Rate Test Screen
Forced Rate – test screen, permits the installer to
force the burner to operate at “high fire” or “low fire”
for the purpose of combustion setup and diagnoses.
Set the “Manual firing rate” to high or low fire by
using the up and down (▲▼) buttons to highlight
either “Set high fire” or “Set low fire”; then select it
by pressing the “OK” button.
When the test is complete, select “Stop test” to return
firing rate control to automatic.
The burner MUST be firing
to initiate “Start test”.
Table 2-3 Forced Rate Parameters
Parameter
Description
Set high fire *
When selected, sets “Manual firing rate” setting equal to the maximum modulation rate of the boiler.
Set low fire *
When selected, sets “Manual firing rate” setting equal to the minimum modulation rate of the boiler.
Start test *
When selected, initiates the forced rate test, burner will operate at the “Manual firing rate” setting
indicated on the screen. To stop test select “Stop test”; which will be displayed in place of “Start test”
once the test is initiated.
* = Password protected
State
Firing rate
Fan speed
Outlet temp
Manual firing rate
Test State: Idle
Test Timer: 0 sec
Set high fire
Set low fire
Start test
Standby
0 RPM
Low
71
o
F
1625 RPM
Forced Rate
Burner must be in run state