Overview of Primary Product

Radiant Ready 30E Installation Guide
29
Troubleshooting (continued)
Issue Cause Solution
Low flow 1. Closed manifold valves
2. Closed isolation valves
3. Zoning valves (actuators)
4. Air in the system
5. Faulty pump
1. If the pump is on and there is low flow to all loops or a specific loop,
check the valves at the end of each loop. the return manifold valves
should be fully open and the supply manifold valves should be balanced.
2. If the pump is on and there is low flow to all loops, ensure the isolation
valve on top of the unit is open.
3. This can only happen if the system is zoned and using actuators.
If the thermostat is calling for heat and the valves are not opening
(after 5 minutes), the actuators are probably wired incorrectly or
there isn’t enough power to open the valves.
If the actuators are open and there still is low flow, check to see if
the supply manifold valve is open.
4. If the pump is on, all loops and isolation valves are open and there is
still low flow in the system, there is probably an air lock in the system.
The system must be refilled and purged.
5. If the pump is on, all loops and isolation valves are open and
there is low flow in the system, the pump may be failing and needs
to be replaced.
Unit not
turning on
1. No call for heat
2. Breaker has tripped
3. Faulty controls
4. Faulty wiring
1. If the thermostat(s) setpoint(s) are incorrectly set too low, there will
be no call for heat and the boiler will not turn on.
2. If the breaker is tripped, the display on the unit will be blank,
indicating no power to the unit.
3. If the controls are incorrectly wired, the call for heat from the
thermostat(s) will not reach the boiler.
4. If the incoming power is incorrectly wired, the breaker will keep
tripping and the unit will not function properly.
Blank display
on thermostat
1. No power to the unit
2. Faulty controls
3. Breaker has tripped
4. Faulty wiring
1. If the thermostat is wired directly into the boiler and is blank, this
indicates there is no power to the boiler. Once power is restored, the
display should illuminate.
If the thermostat(s) are independently powered and feed through
a relay into the boiler; the independent power supply may not be
functioning properly or turned off. Once power is restored, the display
should illuminate.
2. If the thermostat is wired correctly, has power and the display is blank,
the thermostat may be faulty and needs to be replaced.
3. If the breaker is tripped, the display on the unit will be blank, indicating
no power to the unit. Reset the breaker. If breaker operation continues,
contact an electrician.
4. If the power coming into the unit and thermostat is incorrectly wired,
the breaker will keep tripping and the unit will not function properly.