INS_SEFL-I 0610
OPERATING SEQUENCE
Heating mode
1. The thermostat closes the R-W1 circuit, which activates the sequencers and the elements of the first stage one by one. The blower starts-up at the first
selected speed (the lowest speed) as soon as the first element is activated.
2. There is a short time before the activation of a sequencer, which starts the blower at the second selected speed (the highest speed). The elements of the
second stage are then activated one by one (the power selector must be set at High).
Air-conditioning mode
The furnace supplies the necessary 24 V a.c. allowing the thermostat relay to order the air-conditioner’s compressor relay.
Heat pump
If installing a heat pump, you must wire the unit accordingly to prevent simultaneous operation of the electric elements and the heat pump. Refer to the in-
structions supplied with the thermostat or the “Fossil Fuel Kit” to properly connect the furnace and heat pump.
If the electric elements of the furnace and the heat pump run simultaneously, they could overheat. The safety devices of the units would then be activated un-
necessarily.
START-UP PROCEDURE
Please make sure the operating sequence has been duly followed and that all the electric elements operate efficiently.
The blower motor has 4 speeds. They are factory adjusted according to the desired airflow. (Please refer to
appendix 1
for more details)
At any time, you can change the motor speeds according to the desired airflow.
AIRFLOW ADJUSTMENT
When all the heating elements are activated, check the airflow by taking the following measurements.
- Total amperage of all the heating elements
- Voltage at the furnace
- Supply air temperature at a point that is not exposed to the elements’ heat radiation
- Return air temperature
The airflow can be roughly measured using the measurements taken previously. You must use the following formulas :
LitER/s =
0,82 x amp. x voLts
CFm =
3,1 x amp. x voLts
otHER CFm =
kW x 3000
t (°F)
t (°F)
mEtHoD
t (°F)
ANTICIPATOR
If you install a thermostat equipped with a heat anticipator, refer to the user’s guide of the thermostat to adjust it.
Using an ampmeter, measure the current on the single stage thermostat as follows:
1- put the anticipator to its highest setting (ineffective);
2- disconnect the wire from the W1 terminal of the furnace and connect an ampmeter between the W1 terminal and the wire mentioned;
3- increase the temperature set point of the thermostat in order to call for heating and let the furnace run during 3 or 4 minutes in order for it to reach its
maximum capacity;
4- once the current is stable, take the reading and adjust the anticipator to that value. Set the anticipator to a highest value if longer heating cycles are
required.
VERIFYING THE HIGH LIMIT THERMAL PROTECTIONS
When the furnace has run at full capacity for 10 minutes, block the supply and return air openings and measure the supply air temperature at a point that is not
exposed to the elements’ heat radiation. The elements are supposed to shut down one by one before the temperature exceeds 95°C-200°F.
MAINTENANCE
N.B. In order for the warranty to be valid, the unit must be cleaned regularly.
Cut off power supply at circuit breaker/fuse before cleaning the unit. Use a soft rag for dusting. When cleaning, use only a damp rag and non-abrasive dish
soap. Do not use abrasive or chemical cleaners because they may damage the finishing. If the unit is used in a very dusty location, use a vacuum brush to
remove dust and other foreign objects.
Do not use cleaning products identified with these symbols:
N.B.
Note that there is electrical current linked to the unit even if the thermostat is set off. This means that there is a risk of electric shock
as long as the unit is energized.
