TM 9-2320-361-34 17-19. ENGINE COOLANT HEATER TESTING (Contd) I c. Flame Detector Switch Test 1. Place switch (3) in START position. 2. When indicator lamp (4) illuminates, place switch (3) in RUN position. 3. If indicator lamp (4) does not light, adjustor replace flame detector switch (6) (para. 17-2). 4. Place switch (3) in OFF position. I d. Fuel Control Valve Test 1. Place switch (3) in START position. 2. When indicator lamp (4) illuminates, place switch (3) in RUN position. 3. Check fuel consumption at flowmeter (1). Fuel consumption should be 8-11 cc/min at low heat, and 14-19 cc/min at high heat. Replace fuel control valve (2) if fuel consumption rate is not within limits (para. 17-6). 4. Check operating amperage on ammeter (2). If operating amperage exceeds 4 amperes, check heater wiring. Replace damaged parts (paras. 17-2 through 17-10, as necessary). 5. Move switch (5) from LO to HI position. Burning in heater (8) should intensify or decrease. Replace fuel control valve (7) if burning in heater (8) does not intensify or decrease (para. 17-6). 6. Place switch (5) in LO position. 7. Place switch (3) in OFF position. When indicator lamp (4) illuminates, place switch (3) in RUN position. Allow heater to run for a few minutes. NOTE Purge time is the interval from turning control box to OFF position until the indicator lamp goes out. Place switch (3) in OFF position and record purge time. Burning should stop within thirty seconds; blower motor should continue to run up to three minutes. Replace or adjust flame detector switch (6) (para. 17-2) if purge time exceeds three minutes. I e. Blower Motor Test 1. Place switch (3) in START position. 2. 3. 17-52