Nordyne M1B 066, Руководство по установке

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OPTIONAL ACCESSORIES
Necessary when the Furnace is Used with Some
Central Air Conditioners
If an air conditioner is installed that does not use the furnace
blower for air distribution and operates independently of
the furnace, the thermostat system must have an interlock
to prevent the furnace and air conditioner from operating
at the same time. This interlock system usually contains
either a “Heat-Cool” switch which must be turned to one
of the positions to activate heat or cool operation, or a
positive “OFF” switch on the cooling thermostat.
The furnace must also be equipped with an automatic
damper to prevent cold air from being discharged up
around the heat exchanger (NORDYNE p/n 901996 for
furnaces without coil cavity, or p/n 901083 with coil cavity).
See Figure 34 or 35. Cold air may cause condensation
inside the heat exchanger which can rust and lead to
early failure.
Figure 34. Coil Cavity Damper
Figure 35. Damper without Coil Cavity
CONTROL MODULE STATUS INDICATORS - M1M SERIES
Red LED Indicator Status
Steady ON Control OK
Steady OFF No power
Rapid fl ash False fl ame or internal control fault
One fl ash Limit switch is open
Two fl ashes Pressure switch is open
Three fl ashes Pressure switch is stuck closed
Four fl ashes Lockout due to failed ignition
Five fl ashes
L1 neutral reversed or L1 voltage not
present on L1
Flame Status - A Yellow LED labeled “Flame” is provided to indicate
fl ame status. When fl ame is sensed, the fl ame LED is lit. If fl ame sense
is weak, yellow LED will fl ash.
CONTROL MODULE STATUS INDICATOR - M1B
Red LED Indicator Status
One fl ash
The control is in lock-out because the inducer
centrifugal switch is or was stuck closed.
Two fl ashes
The control is in lockout because the signal
was not received by the control that the
inducer centrifugal switch had closed within
the time.
Three fl ashes
The control is in lockout because a failed
ignition attempt, a gas valve error, or a false
fl ame sensed during the warm up period. If
false fl ame has been sensed, the control
will return to normal operation, and repeat
ignition sequence when the false fl ame is
not present.
Four fl ashes
The control is in lockout due to a failure
within the control board
Control Module Status Indicator -
M5S Series Honeywell R7184 Control
Green LED
Indicator
Status
On
Cad cell is sensing fl ame
(could be fl ame or stray light)
Off Cad cell is not sensing fl ame
Flashing - 1/2 sec.
on, 1/2 sec. off
Lockout / Restricted Lockout
Flashing - 2 sec. on,
2 sec. off
Recycle
Beckett 7505 Control
LED Indicator
Color
On Continuously Flashing
Red
Restricted (hard)
lockout
Soft lockout
Green
Cad cell is sensing
fl ame - (could be
fl ame or stray light)
Recycle
Yellow
Pump prime mode
or reset button
currently held for
15+ sec.
N/A
Table 9. Control Module Status Indicators