Suburban DYNALINE DL3-0712, Руководство для архитекторов и инженеров

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Suburban Dynaline 3 A&E Manual 12/2016 Rev.1
30
UNIT CONTROLS AND THEIR FUNCTIONS
High Limit Switch
This switch turns the gas to the main burner off if, for any reason,
the heating section of the unit approaches an unsafe temperature level.
Cycling on limit does not always indicate a defective limit switch.
If the circulating air is blocked or only partially so, the limit control will
function and cause the main burner to go off. Cycling on limit may not
be undesirable, particularly if it happens only occasionally and on a
warm day. If cycling happens too often or for an extended period, the
circulating air system should be thoroughly cleaned.
If the limit switch is determined to be defective, it must be replaced.
Never attempt to repair it, and never shunt the limit switch – even for
only temporary operation.
Flue Block Limit Switch
This switch turns the gas to the main burner off if the flow of
exhaust gases through the unit’s vent system is obstructed creating
an unsafe condition.
If the limit switch is determined to be defective, it must be replaced.
Never attempt to repair it, and never shunt the limit switch – even for
only temporary operation.
Pressure Switch
This switch senses the air pressure generated by the combustion air
blower. When the pressure is adequate to support combustion, the
contacts in the switch close, completing the circuit to the input of the
module board. This activates the ignition sequence. If the pressure is not
sufficient to support combustion, the switch will not operate. Possible
causes: (1) slow combustion air motor, (2) restriction in the combustion
air intake, (3) loose hose, or (4) blockage in connecting hose.
Fresh Air Vent
This introduces outside air into the
living area during unit operation.
The control rod is located in the
lower left front corner of the chassis.
To gain access to the control rod,
the cabinet front must be removed.
(See Figure 30 .)
NOTE: Operating the unit with the
vent open could reduce efficiency
of the unit in both heating and
cooling modes.
Figure 30