Form: 2435-3
Arctic Installation and Operation Manual
Revision: 10
P/N 105641-01
Date: 12-1-2018
Thermal Solutions, 1175 Manheim Pike, Lancaster, PA 17601
Web:
Phone:
717-239-7642
Fax:
877-501-5212
Email:
43
Manual
Reset High
Limit
Aquastat
If the boiler water temperature exceeds the adjustable set point, power is interrupted to the
control circuit of the boiler, which prevents the boiler from operating. Power is interrupted
until the control is manually reset pressing the control’s reset button. When the button is
pressed, power will again be supplied to the control circuit, assuming that the boiler water
temperature has dropped below the setpoint minus the differential setting.
Water Flow
Switch
If the water flow through the boiler drops below the fixed flow rate required to move the
control’s paddle enough to close the control’s contacts, power is interrupted to the control
circuit, which prevents the boiler from operating. When the water flow rate increased, the
paddle closes the control’s contacts and power is supplied to the control circuit.
Pressure /
Safety
Relief
Valve
If the pressure inside the boiler exceeds the fixed set point, the valve opens mechanically and
discharges water. The valve remains open until the pressure inside the boiler drops below the
set point.
High and
Low Gas
Pressure
Switches
If the gas pressure reaches a point above or below the adjustable set point, the contacts of
the switch open and power is interrupted to the control circuit that prevents the boiler from
operating. Power is interrupted until gas pressure is between the high and low gas pressure
set points and the control is manually reset moving the switch to the reset position. The
switches will not reset until the gas pressure is within the set point parameters.
Minimum
Air
Pressure
Switch
If the differential air pressure drops below the fixed set point, the contacts of the switch open
and power is interrupted to the control circuit, which prevents the boiler from operating.
Power is interrupted until air flow/pressure increases so that contacts close.
Maximum
Air
Pressure
Switch
If the differential air pressure exceeds the fixed set point, the contacts of the switch open and
power is interrupted to the control circuit, which prevents the boiler from operating. Power
is interrupted until air flow/pressure decreases below the setting so that the contacts close.
5.7
Troubleshooting
Refer to the troubleshooting section in the Concert Boiler Control manual on how to navigate the
Limit String Status screen that shows an active safety limit status and for an in-depth guide to all the
possible lockouts as well as recommended corrective actions for restore boiler operation.
Table 18: General Troubleshooting
INDICATION
POSSIBLE CAUSE
CORRECTIVE ACTION
Boiler is not
responding to a call
for heat, “Status” and
“Priority” show
“Standby”.
Boiler is not seeing
Enable/Disable of
Domestic Demand
Input.
Check wiring for loose connections or wiring errors.
If Domestic Demand is expected check the DHW
Demand/Modulation is selected properly.
Boiler is not
responding to call for
heat, “Status” shows
“Standby” and
“Priority” shows
Central Heat or
Domestic Hot Water.
Boiler is not firing,
or temperature is
greater than
setpoint.
Select display Help icon and review Limit String
Status.
