Preliminary Start-Up Steps - Temp-Heat THP-400A Installation And Service Manual

Preliminary Start-Up Steps

• Check for proper fuel-supply application, connections, and pressure.
• Check that external regulator has been installed on all natural-gas installations over 4-psi.
• External regulator must be installed on unit on all propane installations.
• Purge gas line of air, as necessary.
• Leak test all gas connections with a 1:3 solution of soap and water.
• Do not operate unit if leaks are present.
• Determine that unit is drawing 100% fresh outside air through its intake grill.
• Check for proper electrical connections and supply voltage.
• Check that the intake and discharge of unit are free from obstructions.
• Reset flame-safety control by pressing reset button on control.
• Reset motor overload.
• Check control settings:
high-temperature limit switch: 270° F
low-temperature limit switch:
THP-400A Switch Panel
THP-500A Switch Panel
40° F
Note: Other switch panel layouts may be
used depending on application.
TEMP-HEAT ®
THP-550 Switch Panel
9