Detroit Radiant Products Company PT Series - Manual (Page 10)

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PT Series
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4.0 Maintenance • Storage • Troubleshooting Guide
WARNING
!
4.0 Maintenance
Gas hoses that are cut or have abrasions and/or wear may fail and release gas
resulting in fire, explosion, serious injury or death. Replace worn or damaged hoses
before use.
Never operate the heater if repairs are necessary. If the heater has not been in service for an extended
period of time, the following maintenance procedures should be performed before heater operation:
Inspect unit before each use and at least annually by a qualified service person.
Using an air hose from 3-5ft. away, gently blow off any dust or dirt that has accumulated on the heater
ceramics ( do not exceed 30 psi, vacuuming is acceptable) and venturi tube.
NOTE: If the venturi tube still appears dirty, remove the orifice bracket and clean it with a brush.
Clean orifice spud using a soft circular object (toothpick, pipe cleaner).
Wipe the reflector clean using a soap and water solution or a non-abrasive aluminum cleaner.
Store LP gas cylinder in accordance with Chapter 5 of the Standard for the Storage and Handling of
Liquefied Petroleum Gases, ANSI/NFPA 58 and all applicable codes. If the heater is not to be used for
an extended period of time, store it in the original carton or a sealed polyethylene bag. When storing
the heater indoors, disconnect the LP gas supply cylinder and remove the cylinder from the heater.
Symptom Possible Cause Corrective Action
Heater fails to light. • Cylinder gas valve closed.
• Cylinder overfilled.
• Excessive draft.
• Inadequate gas pressure.
• Heater safety gas valve defective.
• Obstruction in orifice spud.
• Open valve.
• See safety warning, page 6.
• Relocate or reposition heater.
• Check gas pressure. See Chart 2.2.
• Replace faulty valve.
• Clean or replace orifice.
Heater lights - flame
extinguishes when releasing
the brass button on the
safety gas valve (NOTE: after
depressing the button for one
minute).
• Inadequate gas pressure.
• Insufficient fuel supply.
• Thermocouple defective or loose.
• Heater safety gas valve defective.
• Check gas pressure. See Chart 2.2.
• Provide adequate fuel supply.
• Replace or tighten connection into valve.
• Replace faulty valve.
Fuel mixture burning within
rayhead assembly.
• Gas connection loose.
• Inlet pressure too high.
• Cracked or broken ceramic.
• Improperly lighting.
• Tighten and check for leaks.
• Reduce to proper range. See Chart 2.2.
• Replace rayhead assembly.
• Light at ceramic burner element, not at
the orifice (see Section 3.0).
Ceramic temperature is below
1700° F (NOTE: no orange
glow during operation).
• Orifice spud misaligned.
• Obstruction in orifice spud.
• Inadequate gas pressure.
• Cylinder gas valve not fully open.
• Kinked or obstructed gas supply line.
• Replace orifice bracket.
• Clean or replace.
• Check gas pressure, See Chart 2.2.
• Open cylinder gas valve completely.
• Straighten or clean.
Chart 4.1 • Troubleshooting Guide
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