14-12. AMBULANCE HEATER FUEL CONTROL VALVE TESTING AND ADJUSTMENT
(MODEL 10530A) (Cont'd)
Make sure power source is disconnected. Turn two dzus fasteners (3) securing guard (2) to
housing (1) and remove guard (2).
Loosen nut (4) securing fuel tube (10) to valve outlet port (6) and disconnect fuel tube (10).
Connect .187 in. (4.7 mm) diameter nonmetallic tubing to control valve outlet port (6).
Disconnect long igniter lead (5) from ignition control unit (11).
Close graduated beaker shutoff valve (17) and open fuel container shutoff valve (18). Connect
Have drainage container ready to catch fuel.
Position toggle switch (13) on control box (16) to START position. Open bleed valve (8) on control
valve (7) to remove air from fuel lines (9). Close bleed valve (8) when fuel from outlet port (6) runs
free and clear of air bubbles. Position toggle switch (13) to OFF position.
Remove nonmetallic tubing from outlet port (6) and connect fuel tube (10) on outlet port (6) with
Disconnect power source, and connect long igniter lead (5) to ignition control unit (11).
Connect power source and place HI-LO switch (15) on control box (16) in LO position.
Ignition time is the interval from activating toggle switch until
indicator lamp illuminates.
Place and hold toggle switch (13) in START position and record ignition time. During ignition
period, check ignition amperage on ammeter (12).
If ignition time exceeds three minutes, or if ignition amperage exceeds 15 amperes, repair heater
When indicator lamp (14) illuminates, place toggle switch (13) to RUN position.