TM 9-2350-247-34FINAL TEST — COOLANT HEATER — Continued 0064 003. Place heater control switch in START position and start timing heater immediately.4. Note multimeter reading. Amperage draw must not exceed 12.8 amps (15.3 amps below 70F (21C)).5. Heater should ignite within 40 seconds from time heater control switch is turned on.6. The flame detector switch must transfer within 200 seconds. Transfer will be indicated by the pilot lamp and a drop inamperage draw. Move heater control switch to RUN. Amperage draw must not exceed 1.5 amps (4 amps below 70F(21C)). While burner is igniting and prior to flame switch transfer, check burner seal for signs of fuel leakage. If leakageis present, replace packing gasket (WP 0070 00).7. If heater fails to ignite or is slow to set flame, clean igniter cavity and install a new igniter (see your -20).8. If flame detector switch does not transfer within the required time limits, the burner is bad. Replace heater if burneris bad.9. Allow heater to burn one minute on HI heat, then move heater control HI-LO switch to LO. Burning and blower speedshould continue, but slow down. If heater goes out, replace fuel control valve (WP 0065 00) and heater end cover.10. Turn heater control switch to OFF. Fuel flow and burning should stop in about 30 seconds. Blower should continue torun from 1 to 3 minutes and then stop. If blower does not work within limits, adjust flame detector switch (see your -20).If blower still fails to work within limits, replace flame detector switch (WP 0066 00).0064 00-5
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