Broan Norton ECM Serie Mode D'emploi page 5

3. O O
PERATING PTIONS
The furnace is shipped from the factory in a "Standard Heating Mode" (all switches are in the Down position). When the thermostat calls for heat, the automatic
controls will be activated and the furnace turned "ON" .
The blower will run at low speed or higher speed (as selected by S
As the furnace heats up, it automatically switches to the pre-programmed heating speed when additional elements are activated by the electronic control, if
it was initially set to run at low speed. The timing of this blower speed change will depend on whether F
You may, however, change from the Standard Heating Mode by using the controls built into your furnace.
SPEED SELECTOR
H
IGH
L
OW
The S S switch is used to control the fan speed (ventilation).
PEED ELECTOR
Even if there is no call for heat, the ventilation can be controlled by the
thermostat; the fan speed is determined by this switch.
L –
The blower motor will operate at low speed.
OW
H –
The blower motor will operate at a higher speed.
IGH
4. B
REAKERS
ECM Series furnaces are equipped with breakers, located on the front
panel of the unit. These devices protect the heating elements from
overcurrent. If this situation occurs, the breakers will open to cut the power
from the heating elements only.
NOTE: The number of breakers varies according to the furnace
model; 21ECM10 model has no breakers, 21ECM15, 21ECM18
and 21ECM20 models have 2 breakers and 21ECM23 model has
3 breakers. Refer to Section 8 Wiring Diagrams.
Breakers do not cut power to entire furnace, only to the heating elements. Do not use the breakers to turn off the furnace.
The power to the whole unit can only be cut from the main electrical panel.
All manuals and user guides at all-guides.com
S
PEED ELECTOR
!
WARNING
- 5 -
switch).
or S
AST LOW
HEAT ACTIVATION
S
LOW
F
AST
During spring or fall, you may require less rapid response when the
thermostat calls for heat.
When S is selected, it takes more time to bring all the elements online.
LOW
When F is selected, the heating elements come online faster.
AST
Slow (First Stage)
Slow Response Sequence
Element 1 - Heat on instantly
Blower on after a 3-second delay
Elements 3 and 5
after a 1-minute delay
Element 2 after a 2-minute delay
Element 4 after a 3-minute delay
NOTE: Elements 4 and 5 only where applicable.
FD0001
is selected on the H A
EAT CTIVATION
Fast (Second Stage)
Rapid Response Sequence
Element 1 - Heat on instantly
Blower on after a 3-second delay
Elements 3 and 5
after a 10-second delay
Element 2 after a 20-second delay
Element 4 after a 30-second delay
B
REAKERS
switch.