b. Starting
1.
Check expansion tank and external user to be sure that the system is filled If more oil is needed,
add heat transfer oil complying to MIL-L-22851 Type 3.
2.
Check all connections for tightness of joints to protect against leakage.
3.
Check that proper valves are open to provide oil circulation Open one set of valves (Fig 14), E
and F or G and H, on the hot fluid strainers to get flow for system. Keep one set closed. Open
front supply gate valve (Fig 14), marked A, and pump suction gate valve (Fig. 14), marked C.
4.
Connect 3 phase, 60 Hertz, 230 Volt power supply, ref Para. 10, a & d
5.
Check rotation of motors; rotation is indicated by an arrow on pump and burner housing
Momentarily start blower motor and circulating pump motor for this check.
6.
Turn on main circulating pump. Push start button on circulating pump starter (Fig. 11, Item 1).
When pressure is steady at about 35 PSI on pump discharge, open fuel valves (Fig. 13).
7.
Set temperature control to desired temperature 350 to 4500F.
8.
Turn burner switch "ON" (Fig. 11, Item 2) when fuel pressure is established; burner will ignite
and continue fully automatic to satisfy demand for heat.
9.
Observe flame through observation port at rear of heater. Flame should be clean, not smoky.
Observe exhaust stack; stack should have light haze, not smoky.
c.
Operation.
1.
Sequence of Operation After the activation of the program controller, the automatic sequence of
operation is as follows:
The burner controls and mechanisms move into the prepurge stage during which the
blower operates to scavenge all ash, dust, unburned oil vapors, and residue from the
combustion chamber. The prepurge period has a duration of approximately thirty seconds.
Following the prepurge, the control energizes the pilot valves and ignition transformer.
There is a 12 second period of trial for ignition. With ignition, the low fire valve opens and
the oil cylinder drives the air damper to the high fire position. The damper will remain in
the high fire position until the temperature requirement is reached.
When the temperature controller indicates that the required temperature has been reached,
the low and high fire valves close, the burner flame is extinguished, and oil cylinder returns
the air damper to the closed position at which time the unit goes into standby, then only the
circulating pump motor is operating the pump to circulate the heated transfer oil
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