SummerAire SE10I (E) User manual

1
INSTALLATION INSTRUCTIONS
SUMMERAIRE
ELECTRIC
WARM AIR FURNACE
MODELS: SE10I (E) to SE27I (E)
GENERAL INFORMATION page
General Description 2
Installation Overview 2
Installation 3
TECHNICAL DATA
High voltage connections 5
Low voltage connections 5
Commissioning checklist 9
Model specications 10
DRAWINGS and ILLUSTRATIONS
Blower shipping support bracket 2
Installation orientation 4
Two stage heating output 9
Furnace specications 10
Wiring Diagrams 11
For Service Please Call:
INSTALLATION INFORMATION
_________________ _________________
Qualied Contractor Telephone Number
_________________ _________________
Unit Model Number Unit Serial Number
_________________
Date of Installation

2
WARNING
Supporting the fan motor shaft is a metal bracket, which is mounted on the left side of the furnace fan. It is secured
to the fan housing by two (2) thumbscrews. This bracket must be removed after installation and prior to powering the
furnace on. Failure to do so will cause damage to the motor and blower assembly.
SECTION I
GENERAL DESCIPTION
The SUMMERAIRE Warm Air Electric Furnace is a multi-positional design permitting installation in the upow, downow or
horizontal ow positions.
This furnace may be installed with Air Conditioning or heat pumps.
INSTALLATION OVERVIEW
Install this appliance in accordance with these instruction and all national and local building/safety codes and requirements.
Only connect this furnace to a duct system with a maximum static pressure of 0.6”. Static pressures in excess will result in reduced
air ow and potential elevated discharge air temperatures during heating cycles and reduced discharge air temperatures during
cooling cycles.
Do not operate this furnace without both supply and return air ducts installed with air lters in place or with less than 0.20” external
static pressure.
INITIAL INSPECTION
As soon as you receive this unit unpackage and inspect it thoroughly to ensure that no damage has resulted during the shipping
process.

3
SECTION II
INSTALLATION
General
These furnaces must be properly installed in compliance with all national and local safety standard codes.
This appliance requires 240/1/60.
The supply power lead shall enter the control enclosure of the furnace through the knockout provided on the right hand side of the
furnace. This will ensure the required separation between the low voltage and high voltage leads.
Knockouts are provided for 115 vac and 24 vac connections for humidiers and electronic air cleaners on both sides of the
furnace.
Always ensure that the installation protects all electrical components from exposure to water. Particular attention must be given to
the placement of A/C coils and drains.
A non-combustible base is available for counter ow installations on combustibles.
Adequate access must be provided at the front of this furnace for service.
For horizontal installations, it is recommended to use steel angle support brackets with threaded rods supporting the unit from the
bottom. Refer to Fig # 1.
Due to the hazardous nature of electrical and mechanical requirements only trained and qualied personnel should install and
service heating and cooling equipment.
WARNING
It is important to check airow and make sure that the furnace does not operate above the temperatures specied in
the Specications, Fig #5 .This is particularly important if a cooling coil or a heat pump has been installed. High limit
thermal protectors should never be used to engage during normal operation of the furnace. The high Limit protectors
are designed to engage during the improper functioning of the blower or when the air lter has not been kept clean.

4
Fig 1
Selecting a Location
This furnace shall be centrally located in relation to the outlet registers. All ductwork shall be suitably sized with external static
pressure in mind to ensure satisfactory air distribution.
These furnaces are suited to vertical upow, downow and horizontal installations. This furnace shall not be installed on its front or
back. To install this unit on its front or back would result in inadequate access for servicing.
Always ensure that when suspending this furnace that suitable structural support is available and provides adequate access to the
control and fan compartments for service.
Clearances to Combustible Materials
The Furnace - The furnace is approved for zero clearance to combustible materials regardless of the heating capacity.
It is recommended that 24” be provided at the front of the furnace for clear access for servicing.
Supply Air Ducts - Supply ducts for furnaces with a heating capacity up to and including 20kW may be installed with zero
clearance to combustibles.
Heating ducts for furnaces with heating capacities of 23Kw and greater must have a 25MM (1”) clearance to combustibles for
the rst .90m (36”) of duct. Thereafter the clearance can be zero.
Duct Connections
Of utmost importance to ensure the satisfactory performance of this furnace is the ductwork. To reduce the transmission of noise
and vibration it is recommended to use non-ammable exible isolation collars. Correct duct sizing and installation methods will
ensure proper airow providing comfortable balanced delivered air.
All duct work should be designed, fabricated and installed in accordance with all national and/or local codes.
Air Filters.
Included with this furnace is a 20” x 20” x 1” disposable air lter and supporting lter rack. This lter rack shall be secured to the
furnace casing on either side or the bottom. Do not install this lter rack on the front or back of the furnace. Doing so will result
in inadequate air ows. When cutting the return air opening in the furnace, use the square knockouts in the side and bottom panels
as reference. This will provide a free area opening of 18” x 18”. The use of pleated lters is not recommended unless sized to
suit the airow requirements of the installation. Pleated air lters tend to increase total system static pressures. This may result in
reduced airow. As a result, the heating elements may operate at increased temperatures resulting in an overheat situation. Airow
reductions may also occur during cooling cycles resulting in unacceptably low delivered air temperatures.
NOTE: Return air opening must be
cut out to knockouts provided.
Minimum return air opening size,
18” X 18”.
Caution: Return air openings shall not
be installed in back panel.
Supply air plenum must be constructed of
suitable materials and sized by installing
contractor so as to be of sufcient strength to
support furnace and accessory ttings
and materials.
Return air knock out
NOTE: Field selected suspension materials
must be sized by the installing contractor
and be of sufcient strength to support
air handler weight of 100 lbs and connected
accessory ttings and materials.
Minimum 1” x 1” x 1/8” angle
Horizontal Installation
Upow Installation Counterow Installation

5
SECTION III
High voltage connections
Line power 240/1/60 must be brought in to the furnace control compartment via the knockout provided on the right hand or left hand
side of the furnace. The use of any other entry point may result in these high voltage leads coming into contact with low voltage
circuit components resulting in potentially hazardous conditions. Power lines must be connected to the furnace main terminal
block.
Refer to Fig # 5 to determine proper wire sizing. A ground connection is provided in this compartment. Always ensure that the
ground circuit is installed to meet the requirements of all local and national codes.
Fan motor connections.
All furnaces are provided with multi speed direct drive motors or ECM motors.
Furnaces up to and including 23kW outputs are provided with 1/3 hp, 3 speed motors.
27kW furnaces are provided with 3/4hp 4 speed motors. Only 3 speeds are connected to the controller. The fourth speed motor lead,
low speed, is not connected.
Low Voltage
Contained within the control enclosure is the low voltage transformer. This is 240vac primary with 24vac secondary, 40 VA class
2 transformer. It provides power to the furnace controller, thermostat, A/C condenser relay and 24vac external devices. Always
ensure that the load imposed by external devices does not exceed 40 VA.
Fig 2
Low Voltage Control Connections
Terminal Purpose
G FAN RELAY THERMOSTAT INPUT
W THERMOSTAT INPUT STAGE 1 HEATING
W2 THERMOSTAT INPUT STAGE 2 HEATING
R 24 vac OUTPUT TO THERMOSTAT ONLY
Y/Y1 THERMOSTAT INPUT STAGE 1 COOLING
Y2 THERMOSTAT INPUT STAGE 2 COOLING
C 24 vac COMMON OUTPUT TO THERMOSTAT

6
SECTION 1V
Panel Display, Switches and Circuit Breaker
Located in the upper front right-hand side of the furnace is the control panel containing the indicating light (LED).
LED Indications
The green LED on the front of the furnace directly above the thermostat terminal strip displays the current status of the furnace.
A slow blinking LED, once every 3 seconds indicates that the furnace is powered and in standby mode.
A moderately fast blinking LED, once per second indicates that either a heating or a cooling cycle is in progress.
A rapidly blinking LED, 5 times per second indicates that the furnace is completing a heating cycle and that the heating elements
are cooling down.
The upper rocker switch selects our exclusive Comfort Max feature.
Options Dip Switches 1,2,3,4 ( Refer to wiring diagram)
Should the LED located at the top of the thermostat terminal strip display RED, this is an indication that the switch positions on the
options dipswitch on the controller have either been changed or that the switch itself has failed.
Conrm correct setting.
Switch 1 - ON, Switch 2 - OFF, Switch 3 - OFF, Switch 4 - ON
If the switch positions are correct and fully seated and problem persists, replace controller.
Options Dip Switches A,B,C
These switchs are used to select the correct BTUH output of the furnace.
See chart below.
Quiet Comfort Feature
This switch is used to select the Quiet Comfort Feature.
When switch D turned ON and the Continuous Fan switch on the furnace is switched ON, one heating element is operated at 50%
output.
This will provide a slight warming of the recirculated air eliminating the feeling of drafty air being circulated.
When the Quiet Comfort feature has been activated at Switch D, The LED on the front of the furnace will blink Orange.
The lower rocker switch enables continuous low speed fan operation.
The furnace mounted circuit breaker on the right provides fan motor over amp protection to 16 amps.
This circuit protection only applies to the fan motor.
The Heating element circuit breaks provide overload circuit protection in the event one or more of the heating elements should fail.
Should this happen, one or more of the circuit breakers will trip to the off position.
Do not attempt to reset the breaker or access the control panel.
Call a licensed servicing contractor immediately.
Cooling Defrost
When used with a Heat Pump and ice is detected on external unit, this will add a little heat to refrigerant lines to de-ice.
LED: Amber Medium Flash 2 times per second
BTU SETTING TABLE (OPTION SWITCHES)
OPTION 5KW 10KW 15KW 18KW 20KW 23KW 27KW
A OFF ON OFF OFF OFF ON OFF
B OFF OFF ON OFF OFF OFF ON
C OFF OFF OFF ON ON ON ON

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ComfortMAX
The Comfort Max feature is designed to provide automatic system BTUH output sizing when operated by a single stage thermostat.
When using a 2 stage thermostat, the 2nd stage of the thermostat heat call takes priority.
To activate The Comfort Max feature, remove the jumper wire across W and W2 at the thermostat terminals on the furnace and set
the Comfort Max switch on the furnace to ON. This will provide automatic BTUH sizing of the furnace up to the maximum output
of the furnace.
“ComfortMax is a unique feature of the 9400i Electric Furnace Control. Using a single-stage heating thermostat the control will
determine the ideal number of elements to engage on each heating cycle. Comfort is maximized by ensuring that the perfect level
of heat is supplied to satisfy the call for heat in regular intervals. On the coldest of days all available heating elements will be
activated, but on those milder days only a few will come on, thus nding the perfect balance between energy use and homeowner
comfort”
The ComfortMAX Option for Heating is selected by a switch on the front panel of the appliance. When the switch is activated
during a call for heat the control will only activate the number of elements that are estimated to be needed to satisfy the call for heat
within a 13 to 18 minutes.
If the call for heat is satised in less than 13 minutes the number of heating elements activated in the next cycle will be reduce by one.
If the heat cycle has been activated for more than 18 minutes an additional heating element is energized and this number of elements
will be energized on the next heating cycle.
If the heating cycle is still not satised after 23 minutes then all remaining heating elements are energized and a further heating
element is added to the next heating cycle.
Fig 3
Warning
Do not use these circuit breakers as a means to turn the power off to the furnace.
Prior to removing any of the furnace access panels ensure that the power has been safely
Turned off at the main electrical disconnect switch.
Failure to do so may result in serious bodily injury or death.
FAN MOTOR CIRCUIT BREAKER
LED
HEATING ELEMENT CIRCUIT BREAKERS
CONTINUOUS FAN
COMFORT MAX

8
SECTION V (ECM FAN MOTOR DESIGN ONLY)
SE10I to 23I Electric Furnace 1/3 H.P. ECM Air Flow Selectable Options on Motor Tap Select
Note: Tap select board is located centrally on the controller.
WARNING:
WHEN MAKING ADJUSTMENTS CONSIDERATION MUST ALWAYS BE GIVEN TO DELIVERED AIR TEMPERATURE.
YOU MUST ENSURE THAT THE DELIVERED AIR TEMPERATURE DURING A HEATING CYCLE DOES NOT EXCEED
93 C (200F)
All ows shown are approximate. Actual results may vary by installation.
COOLING TAP SWITCH POSITION
NOTE: TURN POWER OFF BEFORE MAKING A SELECTION
COOLING TAP BOARD
SWITCHES #5 AND #6
AIR FLOW CFM
EXTERNAL STATIC PRESSURE *WC
0.2 0.5 0.7
OFF OFF 1120 1400 1400
ON OFF 980 1100 1100
OFF ON 870 890 850
ON ON 700 625 580
NOTE: CHANGES MAY BE MADE WITH POWER ON
ADJUST TAP BOARD
SWITCHES #3 AND #4
NOTE: CHANGING THE ADJUSTMENT TAP SWITCH POSITIONS AFFECTS
BOTH THE HEATING AND COOLING FAN SPEEDS
OFF OFF DOES NOT CHANGE SELECTED AIR FLOWS
ON OFF INCREASES AIR FLOWS APPROXIMATELY 10%
OFF ON REDUCES AIR FLOWS APPROXIMATELY 15%
HEATING TAP SWITCH POSITION
NOTE: TURN POWER OFF BEFORE MAKING A SELECTION
HEATING TAP BOARD
SWITCHES #1 AND #2
AIR FLOW CFM
EXTERNAL STATIC PRESSURE *WC
0.2 0.5 0.7
OFF OFF 1250 1400 1400
ON OFF 1100 1200 1200
OFF ON 900 900 800
ON ON 700 550 -
COOLING PROFILE SWITCH POSITION
NOTE: TURN POWER OFF BEFORE MAKING A SELECTION
DELAY TAP BOARD
SWITCHES #7 & #8
Pre Run
Time
Minutes
Pre Run
Motor
Speed %
Short Run
Time
Minutes
Short Run
Motor
Speed %
Off Delay
Time
Minutes
Off Delay
Motor
Speed %
OFF OFF 0.50 88 0.00 100 1.00 75
ON OFF 0.50 50 0.75 75 2.50 63
OFF ON 0.50 50 0.75 75 2.50 69
ON ON 0.50 50 0.75 75 4.00 69
PRE RUN AND SHORT TIMES ARE PERIODS TO FULL FAN SPEED OPERATION
ALL FLOWS SHOWN ARE APPROXIMATE
ACTUAL RESULTS MAY VARY BY INSTALLATION.
* BOLD SETTINGS REPRESENT FACTORY SETTINGS.

9
SECTION VI
Fig 4
Stage 1 Stage 2 Stage 1 + 2
Furnace Model W1 BTU Output W2 BTU Output W1 + W2 BTU Output
Total Heat Total Heat Total Heat
Voltage 208 240 208 240 208 240
10kW 12975 17072 -17072 25950 34144
15kW 25950 34144 12975 17072 38925 51216
18kW 20760 27315 25950 34144 46710 61460
20kW 25950 34144 25950 34144 51890 68288
23kW 25950 34144 33734 44387 59682 78530
27kW 25950 34144 44114 58045 70064 92190
SECTION VII
Commissioning Checklist
Ensure that
1) Fan motor shipping bracket is removed from left side of furnace.
2) Thermostat is not connected to controller
3) A/C condenser is connected.
4) Ground is securely connected at furnace ground lug and main panel.
5) Incoming power lines are connected and secure at main terminal block.
6) Continuous fan switch is set to off
7) Comfort max switch on furnace side panel is set to OFF.
Sequence.
1)a) Place a jumper across thermostat terminals R and W on terminal strip. Heating cycle starts and fan turns on.
b) Allow this cycle to turn on all elements.
c) Remove jumper. All elements turn off.
2) Place a jumper across R, Y/Y2 & G, fan starts on Cool speed and A/C starts.
3) Remove jumper, fan cycles down and A/C stops.
4) Power furnace down, connect thermostat, turn power to furnace on.

10
SECTIONVIII
Fig 5
Electric Furnace
SPECIFICATIONS
SEI SERIES
RATINGS - kw 10 15 18 20 23 27
OUTPUT - B.T.U.H. 34144 51216 61460 68288 78530 92190
TEMPERATURE RISE - RANGE ºF 40-50 45-60 55-75 55-75 60-80 60-80
TEMPERATURE RISE - RANGE ºC 4-10 7-15 12-23 12-23 15-26 15-26
ELECTRICAL
VOLTS / HZ / PHASE 230 / 60 / 1
ELEMENT NO. 1 ( kW ) 555545
ELEMENT NO, 2 ( kW ) 554555
ELEMENT NO. 3 ( kW ) -55545
ELEMENT NO. 4 ( kW ) - - 4 5 5 4
ELEMENT NO. 5 ( kW ) - - - - 5 4
ELEMENT NO. 6 ( kW ) -----4
MOTOR AMPS @ 230 VAC PSC 2.2 2.2 2.2 2.2 2.2 5.8
HEATING ELEMENT AMPS 40 60 80 89 92 108
TOTAL AMPS 43 63 83 92 95 114
MINIMUM CIRCUIT AMPS 60 85 100 110 125 150
BREAKER SIZE -AMPS 60 90 100 125 125 150
WIRE SIZE ( AWG ) 6 43321
BLOWER DATA PSC Fan motor design only (HEATING)
BLOWER SPEED @ 0.50 “ E.S.P. MED - LOW MED - LOW MED - HIGH MED - HIGH MED - HIGH MED - HIGH
BLOWER SPEED @ 0.20 “ E.S.P. MED - LOW MED - LOW MED - HIGH MED - HIGH MED - HIGH MED - HIGH
MOTOR H.P. -SPEEDS PSC (230V) 1/3 HP
3-SPEED
3/4 HP
4-SPEED
ECM (230V) 1/3 HP 3/4 HP
BLOWER G10-8 GT12-10
GENERAL INFORMATION
DIMENSIONS
WIDTH X DEPTH X HEIGHT
20 “W X 21 “ D “ X 36 “ H
WARM AIR PLENUM 15 “ X 18 “
RETURN AIR PLENUM 18 1/2 “ X 18 1/2 “
AIR FILTER – 1 SUPPLIED 20 “ X 20 “ X 1 “
SHIPPING WEIGHT 48 KG ( 105 lbs. )
AIR CONDITIONING up to 3 TONS up to 5 TONS
Note; One fan speed tap is parked.
Maximum discharge air temperature - 93 C (200 F)

11
SEI SERIES ELECTRIC FURNACE
L2
R
C
W
Y
G
W2
Y2
O
DIAGNOSTICS
R6 R5 R4 R3 R2 R1
ECM
TAP SELECT
ECM FAN
MOTOR INPUT
H2=120V (HUMIDIFIER)
H1=CONTINUOUS FAN LEAD & SELECT SWITCH
220
VAC
L2
{
{
220
VAC
L1
HIGH
MED
ACC
CONT FAN
LEGEND
BR1 CIRCUIT
BREAKER
BR2 CIRCUIT
BREAKER
BR3 CIRCUIT
BREAKER
HL HIGH
LIMIT
EL ELECTRIC
ELEMENT
R ELEMENT
RELAY
OPTIONS
DIP SWITCH
COMFORT MAX
SWITCH
ON
Remove W/W2 jumper
when a 2 stage heating
thermostat is used or
when activating
Comfort Max mode.
Remove Y/Y2 jumper
when a connecting
to 2 stage cooling.

12
1 2
4
6
8
9
1012
13
15
16
14
5
7
3
SE20I ASSEMBLY
EXPLODED VIEW
ITEM NO. PART NUMBER DESCRIPTION
1 2.ELMT4K240, 2.ELMT5K240 4K AND 5K ELEMENTS
2 2.SWITCHRCKR ON/OFF SWITCH
3 2.SWITCHRCKR ON/OFF SWITCH
4 2.BRKR16A 16A BREAKER
5 2.RELAYSEI HEATING ELEMENT RELAYS
6 2.BRD9400I MAIN CONTROL
7
2.CVR9400I CONTROL COVER
8 2.TRANSEB TRANSFORMER
9
2.MTR1972, 2.MTREON
MOTOR
10 2.CAP MOTOR CAPACITOR
11 2.MTRBRKT557 BLOWER MOTOR BRACKET (NOT SHOWN)
12 2.BLWRG10DD BLOWER
13 2.BRKR50 50A CIRCUIT BREAKER
14 2.BRKR25 25A CIRCUIT BREAKER
15 2.LIMCONT120100 HIGH LIMIT
16 2.TBMAIN MAIN TERMINAL BLOCK
Fig. 6

13
F_SEI_INSMAN_EN_REV9
Specications and illustrations subject to change
without notice and without incurring obligations.
Trent Metals Limited,
Summeraire Manufacturing
Peterborough, ON, Canada K9J 7B1
Phone: [phone]
www.summeraire.com