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Arctic Installation and Operation Manual
P/N 105641-01
If the boiler water temperature exceeds the adjustable set point, power is interrupted to the
Manual
control circuit of the boiler, which prevents the boiler from operating. Power is interrupted
Reset High
until the control is manually reset pressing the control's reset button. When the button is
Limit
pressed, power will again be supplied to the control circuit, assuming that the boiler water
Aquastat
temperature has dropped below the setpoint minus the differential setting.
If the water flow through the boiler drops below the fixed flow rate required to move the
Water Flow
control's paddle enough to close the control's contacts, power is interrupted to the control
Switch
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 /
If the pressure inside the boiler exceeds the fixed set point, the valve opens mechanically and
Relief
Safety
discharges water. The valve remains open until the pressure inside the boiler drops below the
Valve
set point.
If the gas pressure reaches a point above or below the adjustable set point, the contacts of
High and
the switch open and power is interrupted to the control circuit that prevents the boiler from
Low Gas
operating. Power is interrupted until gas pressure is between the high and low gas pressure
Pressure
set points and the control is manually reset moving the switch to the reset position. The
Switches
switches will not reset until the gas pressure is within the set point parameters.
Minimum
If the differential air pressure drops below the fixed set point, the contacts of the switch open
Pressure
and power is interrupted to the control circuit, which prevents the boiler from operating.
Air
Power is interrupted until air flow/pressure increases so that contacts close.
Switch
Maximum
If the differential air pressure exceeds the fixed set point, the contacts of the switch open and
Pressure
Air
power is interrupted to the control circuit, which prevents the boiler from operating. Power
Switch
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
Boiler is not
responding to a call
for heat, "Status" and
"Priority" show
"Standby".
Boiler is not
responding to call for
heat, "Status" shows
"Standby" and
"Priority" shows
Central Heat or
Domestic Hot Water.
43
Thermal Solutions, 1175 Manheim Pike, Lancaster, PA 17601 Web:
Phone: 717-239-7642 Fax: 877-501-5212 Email:
POSSIBLE CAUSE
Boiler is not seeing
Enable/Disable of
Domestic Demand
Input.
Boiler is not firing,
or temperature is
greater than
setpoint.
CORRECTIVE ACTION
Check wiring for loose connections or wiring errors.
If Domestic Demand is expected check the DHW
Demand/Modulation is selected properly.
Select display Help icon and review Limit String
Status.
sales@thermalsolutions.com
Form: 2435-3
Revision: 10
Date: 12-1-2018
www.thermalsolutions.com
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