Intertherm M1B Series, 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 Figure 35 . Cold air may cause
condensation inside the heat exchanger which can rust
and lead to early failure.
Figure 34
Figure 34. coil cavity Damper
Figure 35
Figure 35. Damper without coil cavity
Table 9
contRol MoDulE status InDIcatoRs - M1M sERIEs
RED lED
InDIcatoR
status
Steady ON Control OK
Steady OFF No power
Rapid flash False flame or internal control fault
One flash Limit switch is open
Two flashes Pressure switch is open
Three flashes Pressure switch is stuck closed
Four flashes Lockout due to failed ignition
Five flashes
L1 neutral reversed or L1 voltage not present
on L1
Flame Status - A Yellow LED labeled “Flame” is provided to indicate
flame status. When flame is sensed, the flame LED is lit. If flame sense
is weak, yellow LED will flash.
contRol MoDulE status InDIcatoR - M1B
RED lED
InDIcatoR
status
One flash
The control is in lock-out because the inducer
centrifugal switch is or was stuck closed.
Two flashes
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 flashes
The control is in lockout because a failed
ignition attempt, a gas valve error, or a false
flame sensed during the warm up period. If
false flame has been sensed, the control will
return to normal operation, and repeat ignition
sequence when the false flame is not present.
Four flashes
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 flame
(could be flame or stray light)
Off Cad cell is not sensing flame
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
contInuouslY
ON
FlasHInG
Red
Restricted (hard)
lockout
Soft lockout
Green
Cad cell is sensing
flame - (could be
flame or stray light)
Recycle
Yellow
Pump prime mode or
reset button currently
held for 15+ sec.
N/A
Table 9. Control Module Status Indicators