Stelpro SFE User manual

SFE SFEX SFECM
WWW.STELPRO.COM
CONT[email protected]
1-844-STELPRO
INS-SFE-1122
ELECTRIC FURNACE
OWNER'S
MANUAL
THANK YOU FOR YOUR PURCHASE!
NEED ASSISTANCE? CONTACT STELPRO CUSTOMER SERVICE.

2
IMPORTANT INSTRUCTIONS
SAVE THESE INSTRUCTIONS
TAKE A FEW MINUTES TO READ THE FURNACE’S INSTALLATION GUIDE
TO ENSURE AN EASY AND SAFE INSTALLATION.
WARNING
If these instructions are not followed, the warranty will be
considered null and void and the manufacturer deems no further
responsibility for this product.
This product must be installed by a qualied person and con-
nected by a certified electrician, according to the electrical and
building codes effective in your region.
The following instructions must be adhered to in order to avoid
personal injuries or property damages, serious injuries and poten-
tially fatal electric shocks.
1. Make sure that all screws and electrical terminal connections are
tightly secured before operating the unit in case they would
have loosened during transportation.
2. Protect the heating unit with the appropriate circuit breaker or
fuse, in accordance with the nameplate.
3. Make sure the line voltage (volt) is consistent with that indicated
on the unit’s nameplate.
4. This unit must be grounded.
5. Switch off the power at the circuit breaker/fuse before installing,
repairing and cleaning the unit.
6. Make sure the unit is appropriate for the intended use (if needed,
refer to the product catalog or a representative).
7. If the unit’s capacity is insufcient for the size of the house, it will
be in operation continuously, and may become prematurely
defective.
8. Respect distances and positions indicated in the installation
section.
9. If the installer or the user modies the unit, they will be held re-
sponsible for any damage resulting from this modication, and
the CSA certication could be void.
10. This unit must not come into contact with a water source and
must be protected from splashes (e.g. a wet mop). Do not use
it if any part has been immersed. Moreover, do not turn it on
or off when standing in water or if your hands are wet.
11. When cutting a piece of steel for the installation of the return
duct, do not damage electrical wiring of the unit.
12. Because this unit is hot when in use, it may pose risks even in
normal operation. Therefore, be careful and responsible
when using it. To avoid burns, do not let bare skin touch hot
surfaces. Let the unit cool down for a few minutes before han-
dling it (it stays warm for some time after shut-down).
13. Never block air vents. This obstruction could lead to overheating,
which could result in a re.
14. Do not insert or allow foreign objects to enter any air vent as this
may cause electric shocks, res, or damages to the unit.
15. This unit has hot and arcing or sparking parts inside. It is not
designed to be used or stored in wet areas or areas contain-
ing ammable liquids, combustible materials or corrosive,
abrasive, chemical, explosive and ammable substances such
as, but not limited to, gasoline, paint, chlorine and cleaning
products.
16. Some areas are dustier than others. Thus, it is the user’s respon-
sibility to evaluate if the filter must be changed based on it.
Accumulated dirt can lead to a component malfunction or dis-
coloration (yellowing). It may cause a re hazard if not installed
and maintained in accordance with these instructions.
17. Thermal protection activation indicates that the unit has been
subjected to abnormal operating conditions. If the thermal
protection remains activated or activates and deactivates
repeatedly, it is recommended that a qualied electrician or a
certied repair centre examine the unit in order to make sure it
is not damaged. (Refer to the limited warranty).
18. If the unit is damaged or defective, cut off power supply at circuit
breaker/fuse and call a certied repair centre. (Refer to the
limited warranty).
19. Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
Note: When a part of the product specication must be changed
to improve operability or other functions, priority is given to the
product specication itself. In such instances, the instruction
manual may not entirely match all the functions of the actual
product. Therefore, the actual product and packaging, as well as
the name and illustration, may differ from the manual.
Please note that each furnace is factory inspected before
shipping in order to ensure that every component is operating
efciently.

3
INSTALLING THE FURNACE
1FURNACE LOCATION
2FURNACE CLEARANCE
CLEARANCE IN
FRONT OF UNIT
24 IN. (60 CM) MIN.
The electric furnace is available in several models with various heating capacities (from 10 to 30 kW). All these models adapt
easily to many applications and are suitable for horizontal, upflow and downflow operations (see the gures below). When
installed in vertical downow position, use only an ‘‘L’’ or ‘‘T’’ shaped plenum without openings or registers directly below the
unit.
You must install the furnace on a dry and solid base, in an area free of ammable liquids or vapors and combustible
materials. You must indicate to the furnace user the location of the switches and disconnects. They must be able to
quickly identify them in case of an emergency. Moreover, the furnace should be located as centrally as possible in the area
to heat in order to optimize air dissipation in all the rooms.
This furnace is approved for ‘‘zero inch’’ clearance. Meaning that you can
install it directly against a wall. Ducts for models of 22.5 kW and less can also
be installed with a zero-inch clearance (0 inch). However, ducts for models of
27.5kW and more must have a 1-inch clearance for the rst 36 inches of duct.
From 37inches, this clearance can be reduced to 0 inch. Please refer to the
codes effective in your region if you have any questions concerning clearances.
Since it is necessary to open the door in the front to perform the furnace
maintenance inspection, you must leave at least a 24-inch clearance in front
ofthisdoor.
AIR RETURN
SEE EFFECTIVE
CODES FOR THE
FLOOR ADAPTOR
COMBUSTIBLE
FLOOR
AIR RETURN
DISCHARGE
DISCHARGE
DISCHARGE AIR RETURN
AIR FILTER
AIR FILTER
AIR FILTER

4
Ducts must be designed to deliver the correct airow at the specied external static pressure . You should insulate the ducts
crossing non-heated areas. Moreover, use exible return and supply connectors in order to avoid vibrations as much as
possible. To make your furnace even quieter, follow these instructions:
1. Cover the vertical return and supply ducts with soundproong material;
2. Install at most one or two elbows between registers and the return and supply connectors;
3. Install exible hangers to suspend the ducts;
4. Install bafes in elbows with a small curvature radius.
All models are equipped with a standard size lter rack that you will nd on the top of the furnace. You can install this rack on
one of the three external sides of the furnace or at its bottom. Using snips, cut the selected rack opening following the slots
and holes, and screw the lter rack on it.
3DUCTS AND FILTERS
The Stelpro electric furnace is equipped with a plenum temperature sensor. You can select the plenum temperature setpoint with a
potentiometer installed on the control card. The default factory setpoint is 60°C (140°F). You can select the setpoint from a temperature
range between 40°C (104°F) and 70°C (158°F).
4PLENUM TEMPERATURE CONTROL POTENTIOMETER
OPTIONAL ACCESSORIES
The furnace is equipped with all the devices required for the addition of an air-conditioner or a heat pump (except the heat-cool
thermostat). The refrigerant and drainage pipes must be installed either in the furnace supply or return duct and should not
prevent you from removing the door in front of the furnace.
You can also install a thermostat with an outdoor sensor or a two-stage thermostat to control your furnace. To do so, you must
refer to the instructions supplied with the thermostat as well as the furnace wiring diagram.
When the electric furnace is used in combination with a wood heating unit, you must connect the thermostat of the wood
heating unit across low voltage terminals R and G of the furnace. This thermostat will automatically turn the blower of the
furnace on.
N.B. Please note that if one of these accessories is installed, you must refer to the appropriate guide.

5
ON OFF
To protect yourself against the risk of electric shock, disconnect
the power supply to the cables at the electrical panel.
WARNING: This product must be connected by a qualified electrician according to the electrical and building codes effec-
tive in your region. For 240 VAC connection, you can use copper or aluminum wire (75°C [165 °F]), except for 27.5 kw and
30 kw models where only copper wire is allowed.
1TURNING OFF THE POWER SUPPLY
2ELECTRICAL CONNECTIONS OF THE FURNACE
ELECTRICAL CONNECTIONS
An optional neutral terminal junction (SCOND) can be installed in the electrical compartment of the furnace. It is used to connect
a neutral line conductor at the entrance. Some auxiliary devices, like a dehumidier, are supplied by a 120 VAC power source.
The neutral connector allows to supply auxiliary devices with a 120 VAC power source from the furnace.
This furnace must be connected to a 240 or 208 VAC power source. If you want to energize the furnace at 208 VAC, you must
change a connection on the 24 V terminal board of the transformer (see the illustration below). Refer to the local and national
electrical codes to know which wire size, fuses and circuit breakers are required.
TRANSFORMER PRIMARY VOLTAGE SELECTION
The transformer primary is connected in factory to operate on 240 VAC (black and white wires)
Orange
Orange 24V
24V
Com
240V
208V
Secondary
Class 2
Transformer
Primary
White
Black
Harness 1 red
Connection for 240V
Connection for 208V
Red
or
Connected to busbar 2

6
ON OFF
3ELECTRICAL CONNECTION OF THE THERMOSTAT
1. Installthe thermostat accordingto the manufacturer'srecom-
mendations.
2. Do not install the thermostat in a location where temperature
measurements could be altered. For example:
• close to a window, on an external wall, or close to a door
leading outside;
• exposed directly
to the light or heat
of the sun, a lamp,
a replace or any
other heat source;
• close or in front of
an air outlet;
• close to concea-
led ducts or a
chimney; and
• in a location with
poor air ow (e.g.
behind a door),
or with frequent
air draft condi-
tions (e.g. head
ofstairs).
3. Seal the wall openings in order to minimize the drafts which
can alter temperature measurements. Read the user’s
guide of the thermostat carefully and refer to the following
illustrations to connect the thermostat.
W1
G
W2
OB
C
R
Y2
Y1
W1
G
W2
OB
C
R
Y2
Y1
OB
C
Y2
Y1
W1
G
W2
OB
C
R
Y2
Y1
W1
G
W2
OB
C
R
Y2
Y1
C
Y2
Y1
THERMOSTAT + ELECTRIC FURNACE + HEAT PUMP CONNECTION
24V THERMOSTAT
Y2 ON SFECM FURNACE ONLY
Y2 ON SFECM FURNACE ONLY
ELECTRIC FURNACE
HEAT PUMP
THERMOSTAT + ELECTRIC FURNACE + AIR CONDITIONING CONNECTION
24V THERMOSTAT ELECTRIC FURNACE
AIR CONDITIONING
W1
G
W2
OB
C
R
Y2
Y1
W1
G
W2
OB
C
R
Y2
Y1
OB
C
Y2
Y1
W1
G
W2
OB
C
R
Y2
Y1
W1
G
W2
OB
C
R
Y2
Y1
C
Y2
Y1
THERMOSTAT + ELECTRIC FURNACE + HEAT PUMP CONNECTION
24V THERMOSTAT
Y2 ON SFECM FURNACE ONLY
Y2 ON SFECM FURNACE ONLY
ELECTRIC FURNACE
HEAT PUMP
THERMOSTAT + ELECTRIC FURNACE + AIR CONDITIONING CONNECTION
24V THERMOSTAT ELECTRIC FURNACE
AIR CONDITIONING
4ELECTRICAL CONNECTION
OF AN ELECTRONIC FILTER
AND A HUMIDIFIER
SFECM MODELS ONLY
* R TERMINAL : 1A MAXIMUM
TYPICAL FURNACE TO AUXILIARY DEVICE CONNECTIONS
ELECTRIC FURNACE
AUXILIARY DEVICE
24 VAC OR
12 VAC OR
120 VAC
LOAD
Restore power to the furnace and make sure the
furnace works by raising the temperature until the unit
starts to heat.
A humidier and an electronic lter can be controlled
directly from the furnace. There is a terminal block for
this purpose in the furnace as shown here in the diagram.
The terminal block is connected to an internal relay that
activates the auxiliary devices when the blower of the
furnace is in operation.
5TURNING THE POWER BACK ON

7
MODES
ECO
STANDARD
HIGH/HAUTE
THERMOSTAT
MAX
MIN
LOW/BASSE
1 3 52 4 6 7
SFE-SFEX-SFECM
CONTINUOUS HEATING
button
Allows the selection of the
continuous heating mode
(p.8) or the installation type
(B "B")
MODE
button
Allows the selection of the
Standard or Eco mode
(p.10) or the installation
type (B "O")
CONTINUOUS VENTILATION
button
Allows the selection of the
speed continuous ventilation
mode (p.8) or the installation
type (A)
CONTROL PANEL
HEATING DEMAND
ONE-STAGE THERMOSTAT
W1 The thermostat closes the R-W1 circuit, which activates 100% of the heating sequence. The blower starts up at
medium speed and the furnace elements are activated one by one to reach the adjustable temperature limit set on the
potentiometer of the furnace control card.
If there is still a W1 heating demand after 30 minutes, the heating sequence continues as per the W2 sequence.
OR
W2 The blower switches to the medium speed and all the furnace elements are activated one by one (100% heating).
The plenum temperature is still limited by the potentiometer of the control card.
1. LOW SPEED CONTINUOUS VENTILATION (GREEN)
Indicates that the low speed continuous ventilation
mode is activated.
2. HIGH SPEED CONTINUOUS VENTILATION (GREEN)
Indicates that the high speed continuous ventilation
mode is activated.
3. STANDARD MODE (GREEN)
Indicates Standard mode is activated.
4. ECO MODE (GREEN)
Indicates that the Eco mode is activated.
5. MIN CONTINUOUS HEATING (GREEN)
Indicates that the minimum of heating capacity is
activated.
6. MAX CONTINUOUS HEATING (GREEN)
Indicates that the maximum of continuous heating
mode is activated.
7. THERMOSTAT (YELLOW)
Indicates that the furnace is receiving a heating
demand from the thermostat.
LED LEGEND
OPERATION

8
TWO-STAGE THERMOSTAT
The control card of the furnace auto-detects the two
stages of the thermostat.
W1 The thermostat closes the R-W1 circuit, which acti-
vates the rst stage of the heating sequence (±50% hea-
ting). The blower starts up at low speed and the furnace
elements are activated one by one to reach the adjustable
temperature limit set by the potentiometer on the furnace
control card.
If there is still a W1 heating demand after 30 minutes, the
heating sequence continues as per the W2 sequence.
AND/OR
W2 If the thermostat closes the R-W2 circuit, the
sequence continues as follows: the blower switches to the
medium speed and all the furnace elements are activated
one by one (100% heating). The plenum temperature is still
limited by the potentiometer of the control card.
The SFECM series allows to adjust the continuous ventilation airows independently from the ventilation airow in
heating mode. Note that it also allows airows as low as 300 cfm in continuous ventilation.
CONTINUOUS VENTILATION
Two ventilation speeds can be selected on the furnace control panel: LOW SPEED CONTINUOUS VENTILATION or
HIGH SPEED CONTINUOUS VENTILATION. The user can select the ventilation speed by pressing the CONTINUOUS
VENTILATION button.
CONTINUOUS HEATING
The continuous heating option allows one or two heating elements to operate continuously. The user can select min (one
element) or max (two elements) continuous heating by pressing the CONTINUOUS HEATING button.* The continuous
heating mode is useful from the beginning to the end of the heating season since it reduces temperature variations into
the house. If the minimum or maximum continuous heating option is activated by the user, the furnace will deactivate it
when the heating season ends (more than two hours without any heating demand). Moreover, it will reactivate it when a
new heating season begins.
HEATING DEMAND, STANDARD MODE
(WITH T-STAT INTELLIGENCE)
Note that the pilot light indicating the heating option will blink if the furnace deactivates this option because the hea-
ting season is over. This indicates that the continuous heating will be activated again at the start of the next heating
season.
*Please note that for model #1021, the minimum and maximum continuous heating are the same (one element).
100% HEAT,
MED SPEED
ADJUST. LIMIT
50% HEAT,
LOW SPEED
ADJUST. LIMIT
1 STAGE W1 2 STAGES W1 W2 W1 > 30 MIN
ACTIVATION OF RELAYS, 3-SEC. INTERVAL
AIR CONDITIONING
The furnace supplies the necessary 24V power for the thermostat relay (R-Y terminals) to control the air-conditioner compres-
sor relay. When the R-Y terminals are activated, the blower starts-up at high speed. See the connection diagram page 6.

9
TYPE A TYPE B
HEAT PUMP
If a heat pump is installed in your central heating system, the Stelpro electric furnace offers the installer two types of
installations: type “A” or type “B”. Installation “A” must be selected when the heat pump is installed After the furnace (air
supply), and installation “B” must be selected when the heat pump is installed Before the furnace (air return), as shown
in the next picture. Once again, when the R-Y terminals are activated, the blower starts-up at high speed.
MIN. 12"
TYPE "A"
AIR RETURN
AIR SUPPLY
HEAT PUMP
HEAT PUMP
AIR RETURN
TYPE "B"
AIR SUPPLY
MIN. 12"
TYPE "A"
AIR RETURN
AIR SUPPLY
HEAT PUMP
HEAT PUMP
AIR RETURN
TYPE "B"
AIR SUPPLY
TYPE A
For Type A installation, whenever the heat pump is in operation (Y demand from the thermostat), no electric heating will
be supplied by the furnace. Type A is the factory default installation type.
TYPE B
The installer must change the furnace installation type to set the default-powered side of the heat pump’s reversible
valve to “O” for priority heating or "B" for priority air conditioning. To change the type of installation, set the lowest circuit
breaker on the furnace door to OFF. Press one of the three buttons on the control panel following the diagram below.
While keeping the selected button pressed, reset the circuit breaker to ON. The indicator light above the selected button
will blink to indicate the type of installation programmed.
INSTALLATION TYPE SELECTION
TYPE “B”, STANDARD MODE WITH TEMPERATURE COMPENSATION (WITH T-STAT INTELLIGENCE)
1 stage W1 2 stages W1 W2 YW1 > 30 min
100% heat,
Med speed
Adjust. limit
50% heat,
Low speed
Adjust. limit
Activation of relays, 3-sec. interval
CONTINUOUS
VENTILATION button
MODE
button
CONTINUOUS HEATING
button
Type A
factory setting
Type B – valve "O"
normally open
(priority heating)
Type B – valve "B"
normally open (priority
air conditioning)

10
OPERATING LOGIC TABLE WITH A THERMOSTAT
CONNECTION – INPUT FURNACE – OUTLET
FUNCTION TYPE VENTILATION
SINGLE-
STAGE
THERMOSTAT
TWO-STAGE
THERMOSTAT COMPRESSOR
HEAT PUMP
REVERSING
VALVE
HEATING
TEMPERATURE
LIMIT IN THE
PLENUM
FAN SPEED** PRIORITY
G W1 W1 W2 Y1 OR Y2* O/B % °C/°F
FAN ONLY ALL 1 0 0 0 0 x 0 none low –
HEATING ALL
x 1 – – 0 x 100 adjustable medium –
x – 1 0 0 x 50 adjustable low –
x – x 1 0 x 100 adjustable medium –
COMPENSATION
(HEAT PUMP/AIR
CONDITIONING)
A
x 0 0 0 1 x 0 none high –
x 1 1 0 1 x 100 35°C/95°F high –
x – x 1 1 x 100 35°C/95°F high –
B
x x x x 1 1 0 none high heating
"O"
x x x x 1 0 100 40°C/104°F high
x x x x 1 1 100 40°C/104°F high air
conditioning
"B"
x x x x 1 0 0 none high
x= signal status not important (0 or 1), 1= signal present, 0= no signal, –= not applicable
* Y2 = maximum flow rate only (not adjustable), ** = Speed adjustable for the SFECM model
The indicator light above the selected button will blink to indicate the type of installation programmed.
A heat pump can operate year round and save you money on heating costs thanks to the Stelpro furnace's unique
plenum air temperature control function. This function always maintains equal air temperature in the plenum and ducts.
In cold weather, the heat pump loses some of its heating capacity, but it is still more economical than electric heating.
The furnace will therefore compensate for the heat pump's loss of output in cold weather. Even when the heat pump is in
defrost mode and tends to cool the air in the house, the furnace will itself increase the heating power quickly to compen-
sate the heat pump's defrosting cooling effect. In this case, the temperature in the plenum is limited to the temperature
indicated in the table above.
ECO MODE
The user can select two different heating modes by pressing the button located in the middle of the control panel
(MODE button). LThe two modes affect the heating demand and the functions when used with the heat pump and the
STANDARD mode described previously. When ECO mode is selected, the heating sequence is longer than STANDARD
and the heating power will ramp-up to 50% heating for ve (5) minutes. If a heating demand lasts 30 minutes, a second
sequence of ve (5) minutes activates a ramp-up of the elements to 100% heating at medium speed. For a two-stage
thermostat, when the W2 is in demand, the furnace waits another ve (5) minutes before ramping-up for ve (5) minutes
until 100% of heating capacity is reached. Also, the temperature compensation option explained previously in installation
type ”B” does not operate in ECO mode.Thus, whenever the heat pump is activated (Y demand), no electric heating will
be supplied by the furnace.
5 MIN 30 MIN 35 MIN
100% Heat,
Med speed,
Adjust. limit
50% Heat,
Low speed
Adjust. limit
5 MIN 10 MIN 15 MIN
100% Heat,
Med speed,
Adjust. limit
50% Heat,
Low speed
Adjust. limit
HEATING DEMAND, ECO MODE, W1 DEMAND
(WITH FURNACE INTELLIGENCE)
HEATING DEMAND, ECO MODE, W2 DEMAND
(WITH FURNACE INTELLIGENCE)