Floaire DIRECT FIRED MODULE Manual do Utilizador descarregar pdf (Página 23)

23

Burner Troubleshooting Chart

Problem

Potential Cause

Corrective Action

Pilot Does Not Light/Stay Lit

Main gas if off

Open main gas valve

Air in gas line

Purge gas line

Dirt in pilot orifice

Clean orifice with compressed air

Gas pressure out of range

Adjust to proper gas pressure

Pilot valve is off

Turn pilot valve on

Pilot orifice fitting leak

Tighten pilot orifice

Excessive drafts

Re-direct draft away from unit

Safety device has cut power

Check limits and airflow switch

Dirty flame sensor

Clean flame sensor

Remote panel in “Vent” mode

Change to “Heat” mode

No spark at igniter

Check wiring, sensor, and ignition

controller. Check spark gap as shown

below.

Main Burner Does Not Light

(Pilot is Lit)

Defective valve

Replace combination valve

Loose valve wiring

Check wiring to valve

Defective pilot sensor

Replace pilot sensor

Shut off valve closed

Open shut off valve

Defective flame safety controller

Replace flame safety controller

Pilot fails as main gas valves open

and main gas begins to flow

Plug the first burner port next to the

pilot gas tube with burner cement

Not Enough Heat

Main gas pressure too low

Increase main gas pressure – do not

exceed 14 in. w.c. inlet pressure (5 psi.

on size 4-5 heater)

Too much airflow

Decrease airflow if possible

Burner undersized

Check design conditions

Gas controls not wired properly

Check wiring

Thermostat setting too low

Increase thermostat setting

Thermostat malfunction

Check/replace thermostat

Unit locked into low fire

Check wiring

Too Much Heat

Defective modulating gas valve

Check/replace modulating valve

Thermostat setting too high

Decrease thermostat setting

Unit locked into high fire

Check wiring

Thermostat wired incorrectly

Check thermostat wiring

Proper Spark Gap

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