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OWNER`S AND INSTALLER`S MANUAL

1. HEATING ELEMENTS SUPPLY AIR BLOWER STAGING ROW 2 TOP AN HIGH BLACK i ii 350 Le MED HIGH BLUE MED LOW YELLOW RED 3 UU 10 ZN LOW y COM 3 5 350 1 8 TNI SEE d NOTE 1 3 7 350 2 6 TZN M 5 a M s Ea EO 350 Ale 1 5 x d Og 9 a i age ail ER 38 350 WHITE aim gu 2 3 T O 1 2 LN 3 i 350 CORE BLOWER HEAT EXCHANGER LIMIT N C N C YELLOW COM o 135 FAN 80 LIMIT N O CONTROL HIGH RI 135 FAN 125 9 N O c M CONTROL z VIN rs p SoHo 1905 LIMIT 170 DISK N CH N O C Switches to l
2. NOTES 1 SUPPLY AIR BLOWER HIGH BLACK MED HIGH EEL MED LOW HEATING ELEMENTS EMENT OW ERED STAGING NUMBER Ne COM 2 E9 i E8 NC SEE NOTE 1 B B N C 5 E6 N a A M Dia Dio NC mu 1 E5 g 2a Ou Ula N C e Z5 Za za d if 2 E3 N C Is om AR m O e i E N C 3 Ei N C CORE BLOWER 240 NG HEAT EXCHANGER LIMIT YELLOW COM YELLOW 60 180 A cx y 135 FAN l 7 HIGH BLACK CONTROL 125 LIMIT LIMIT l Ree LOW BROWN NO CONTROL RED BLACK N CH N O ET o eta 170 DISK XE Switches to low COM Ko COM on temp rise ior uA X VG c oid 3 We N Een e mm mo Meo we Ul Fo EO Fo wm gee 252 252 255 277 VOLT Bees Q7 97 lt 9 No Boor mee dee eee COM COMMON OZS voa LON LOA AA STAGE 1 Q moo CHARGING SEQUENCER oe C a C amp ejrej H 15 a 1 G m NO gt Q Waser N O ERO a S 60 60 60 75VA 1 I STAGE 2 TRANSFORMER CHARGING SEQUENCER i 240v 24v je fal e 4 N O Chee o d aL N O DEA mut STAGE3 CHARGING SEQUENCER BLACK Oo RED a Coe BLUE OOo GROUND LUGS
3. Supply air blower speed selection terminals wiring 2 Line voltage field wiring connections see Figure 8 Use copper or aluminum conductors rated for 75C or higher for field connection of this device The blowers and the controls circuit MUST be powered with 240V or 208V X SEENOTE2 ect is Installing The Furnace ona Ht LOW VOLTAGE ELECTRICAL CONNECTIONS The outdoor temperature sensor room thermostat and peak control signal are low voltage wire connections to the furnace All low voltage wiring must be segregated from line voltage circuits in the furnace ow Voltage Wiring Diagram FIGURE 12 CHARGE no roLoap _ BLUE WHITE RESISTOR nu BLUE EE NOTE 2 HYDRAULIC SEE NOTE 1 CHARGE CONTROL TO WALL mm o THERMOSTAT YELLOWBRAID THERMOSTAT lbood Sec sg WHITE BLUE R WGC YY2Y3 FRONTVEW ETT OF SFI 1A POWER R1 Sohm 10W GREY OFF PEAK ORANGE HEAT CALL 3A ETS CHRGNG e e STAGE 3 SIGNAL ORANGE BLACK STAGE 2 SIGNAL WHITE BLUE SUOT IOUUOD SULA PRIA 99 3 0A MOT STAGE 2 STAGE 1 SIGNAL ORANGE Z LEVEL 1 SIGNAL SEQUENCOR bis CORE BLOWER 3A e LEVEL3 wo WINTER Auto H O COIL E SUMMER Lo N O Ga rais OVERRIDE Eur ORON STAGE
4. No Voltage Check for 24 VAC Check unit wiring across L1 and L2 on the auxiliary control board Verify polarity of the red and yellow thermocouple wires connected to the auxiliary control board Red should be connected to TC and yellow should be connected to TC Check continuity across Jump TC and TC the red and yellow terminals on auxiliary thermocouple wires Light OFF control board Continuity Incorrect Contact No Continuity Replace the Replace auxiliary CE Steffes thermocouple control relay board Fix wiring Technical Support Troubleshooting Information conta C PROBLEM FURNACE UNDERCHARGES Unit Undercharges on Cold Days Check charge control Unit Undercharges on Warm Days thermostat knob 33 for proper position Less than Max Usage Set the AUTO HIGH LOW toggle switch to the HIGH position Check for proper amperage draw on heating elements 17 DLF30B 117 Amps 240V systems DLF40B 160 Amps 240V systems NOTE Some furnaces may incorporate a Stage II Lockout feature If so the control circuit on these furnaces must be de energized and then re energized to ensure this lockout is deactivated Check daily kWh usage Proper Maximum Usage Less Than Proper Amperage With the AUTO HIGH LOW toggle No Voltage Present Witch still se to HIGH position check for zero voltage on charge control resistor 66 from center to bottom and then center to top on th
5. CORE BLOWER NC N CHEAT EXCHANGER LIMIT YELLOW COM E 135 FAN 80 LIMIT N OLLONTROE m HIGH 135 FAN 125 N OLCoNTROL x LOW go a 3 og m t Sto He 19076 SP LIMIT 170 DISK NCILNO Switches to low dm ds E on temp rise COM E 3 1 pE E WHITE BLACK E a Hi CORE a Eso aT E mowm g 5 mi Un lam c E e 1 n z L I les m a Ma i See N O am co a ua mo 3 Am x QU TIGE 0 m gaS STAGE 1 BO5 gt 85 eE es Ne CHARGING SEQUENCOR z 69208420 20 iu COM BLUE S46 28 x 58 EE o E EE aol BORO RO CR SF HOUSE N C RAS OL n r1 n BLOWER STS IILL S lle ollet RC so E j 15 5 8 8 CIRCUIT a a BREAKERS STAGE2 E CHARGING SEQUENCOR BLUE BLACK N O 240v 24v s 75VA a Sila alle sila IS N O i a U TRANSFORMER o n i LL NO LT LU 9 STAGE3 CHARGING SEQUENCOR BLACK O QO RED Q lololo BLUE NOTES 1 Supply air blower speed selection terminals wiring 2 Line voltage field wiring connections see Figure 8 GROUND LUGS Use copper or aluminum conductors rated for 75C or higher for field connection of this device SEE NOTE 2 Installing The Furnace conta 17 DLF40B 240V OR 208V UNITS ONLY FIGURE 10 Use copper or aluminum conductors rated for 75C or higher for field connection of this device
6. arrow shaped pieces facing inward and with the narrow ends of the deflectors pointing up Step 4 Lower the insulation blankets 3 4 amp 5 back into position one at a time Carefully tuck the sides of this insulation into the edges corners and around the exposed portions of heating elements 17 Step 5 Replace the galvanized front panel utilizing the original 8 x 1 sheet metal screws that were re moved Step 6 Replace the painted front panel 11 using blunt tip screws only 2 DUCTING The Steffes furnace has been specially designed for versatility and may be installed to meet right to left or left to right air flow requirements The furnace is factory configured for a left to right air flow If it is desired to reverse the air flow do the following Step 1 Reroute the supply air blower wiring harness 55 to the opposite side of furnace base by fishing the harness between bottom radiant heat shield 51 and bottom panel 47 Be sure to route the wiring harness away from the heat exchanger and place any excess wiring between the radiant heat shield 51 and bottom panel 47 II Installing The Furnace conta For air delivery the furnace is equipped with a 4 speed supply air blower which is factory wired to operate in medium low speed for heating and in medium high speed for cooling and a fan only thermostat setting The blower speed may be adjusted for lower or higher output requirements To do so change the wiring on the
7. blower speed selection terminals located on the supply air blower See the Line Voltage Wiring Diagrams in this manual for more information on the wiring and Table 3 for information on duct pressure with regard to blower speed TABLE 3 STATIC PRESSURE INCHES WATER SUPPLY AIR BLOWER SPEED 0 10 0 25 0 50 HIGH Not Recommended 1850 CFM 1560 CFM MEDIUM HIGH 1800 CFM 1780 CFM 1470 CFM MEDIUM LOW 1610 CFM 1580 CFM 1420 CFM LOW 1230 CFM 1205 CFM Not recommended 20 Static Maximum Attaching the Ducting Step 1 Remove the supply air blower plenum assembly 60 and filter rack 18 from their boxes Step 2 To access the blower 56 remove the screws from the supply air blower plenum front access cover 60 and detach it from the plenum Step 3 The supply air blower 56 is shipped banded to the plenum assembly 60 Cut the band to remove the blower from the plenum and slide it into the plenum track through the front access Step 4 Attach the front access cover to the plenum Step 5 Attach the supply air blower plenum assembly 60 to the furnace by drilling two 1 8 holes per edge Attach to the furnace supply air side using the blunt tip screws supplied in the hardware package Step 6 Secure the filter rack assembly 18 on the return air side again by drilling 1 8 holes per edge and using the blunt tip screws supplied in the hardware package A filter should already be included and installed in the duct slot o
8. 3 uno SIGNAL SEQUENCOR HOUSE BLOWER le eo el FS NL COIL EN pasci TO OUTDOOR Hes do eae SENSOR E XO T pee STAGE 1 CHARGING SEQUENCOR 24 4v BACK VIEW OF SFIII m SEE N O Q H NOTE N O m N C 3 UTILITY CONTROL T No _ 40VA REVERSING SWITCH STAGE 2 CHARGING TRAN fH J3 1 SEOUENCOR R 240 34v 2 1 FP NO T J4 1 p NO L m 3 JT ii N A Z NO 40VA STAGE 3 CHARGING TRAN 2 SEQUENCOR NOTES 1 Low voltage auxiliary control contacts a Y to Y2 contacts open when load control device closes b Y to Y3 contacts close when load control device closes 2 Auxiliary contacts close during off peak heat calls 3 N O used for open on peak load control device switch closes to charge N C used for closed on peak load control device switch opens to charge 0B Imstalling The Furnace onra Outdoor Temperature Sensor The outdoor temperature sensor provides outdoor temperature information for automatic charge regulation of the furnace In standard configuration from the factory the outdoor sensor is calibrated at 55 F 35 F and 15 F for initiating the level 1 1 3 2 2 3 and 3 maximum brick core charges If outdoor temperature ch
9. B bab a Hi SUMMER Lo SUMMER Lo OVERRIDE OVERRIDE START CAI EI START CAI W GBR W GBR le eos e 9 oS Y Y TO OUTDOOR TO OUTDOOR SENSOR SENSOR NOTES 1 Wiring shown is for use with N O switch closes to charge load control device Y and Y2 would be used with a N C system switch opens to charge 0 Installing The Furnace onra The heating elements in the furnace are controlled on peak not able to store heat in the brick core via low voltage wiring Connecting the furnace to load control signaling device Step 1 Route a low voltage circuit from the power company s load control peak signaling device to the charge control circuit board 30 located inside the electrical compartment of the furnace Never install any wiring in the line voltage compartment of the furnace unless it is rated for line voltage Step 2 Connect the field wiring to the BLUE and BLUE WHITE wires hanging from the back of the charge control circuit board 30 See to the Low Voltage Wiring Diagram in this manual for a depictition of the location of these wires Step 3 Be sure the N O N C slide switch on the back of the charge control circuit board 30 is in the position that matches the input of the power company s load control signaling device N O A closed power company switch will signal an off peak time to the furnace charging is enabled An open power company switch will signal an on peak time to the furnace charging i
10. HAS NO CORE CHARGE l Check power company load control switch amp furnace OFF PEAK light on the charge control circuit board 30 for proper operation Continue following procedures in off peak mode Lights Inoperable Lights Operable Check outdoor temp SENSOR lights on the charge control circuit Check ETS CHARGING Check for 24VAC on board 30 light on the charge control orange wire going to the top circuit board 30 staging sequencer 24 One or More Lights on Voltage Present No Voltage Replace charge Charge trol th Jump charge control thermostat Light ON a 2 ore Check for Check unit wiring 32 brown lead to charge defective charge and or replace control thermostat orange lead sequencers 26 and charge control for defective heating circuit board 30 elements 17 Make sure charge control thermostat shaft is in the full clockwise position Replace charge control Check for 24 VAC between each of the two circuit board 30 bottom 3 amp low voltage fuses and the room thermostat connection C terminal block position on charge control circuit board 30 ae Go to Auxiliary Control Board 1302038 1g Furnace Will Not Charge Continued Voltage Not Present On One or Both Charge Light OFF Jump orange leads Charge Light to the auxiliary OFF control board Both Fuses Energized Check outdoor temperature Above 55
11. circuit board 30 Os ome together to perform the following tests OFF PEAK A Set selector switches to SUMMER and AUTO positions One HEAT CALL outdoor sensor light should be on Check the unit s charging circuits amperages On 240V systems they should read a ci DLF30B 40 Amp DLF40B 53 Amp v Bo oad B Set selector switches to WINTER and AUTO positions Two Me ee outdoor sensor lights should be on Check the unit s charging circuits uc amperages On 240V systems they should read RO O HIGH DLF30B 80 Amp DLFA4OB 106 Amp nm s D O C Set selector switches to WINTER and HIGH position Three outdoor O ser cae sensor lights should be on Check the unit s charging circuits amperages On 240V systems they should read DLF30B 120 Amp DLF40B 160 Amp D Simulate an on peak period by changing the status of the blue and blue white wires All heating elements 17 should cycle off To perform Step 7 the peak override feature must be enabled This feature may not be avail able in your area Please consult your power company if you are unsure of whether this option is available to you If it is available and you desire to enable the feature contact your power company for instructions on how to do so Skip Step 7 if the peak override feature is not avail able to you With unit in the on peak mode depress the override START switch and observe the OVERRIDE indicator light The light should be illuminated Rem
12. manual must be retained by new owners if ownership of the furnace changes Anydeviation from these instructions may void the warranty and could result in hazardous operating conditions The warranty registration card provided as part of the unit documentation set must be completed and returned to Steffes Corporation Failure to do so may adversely affect warranty claims Record the serial number and model number in the spaces provided on the back page of this manual These numbers are located on the right side of the furnace base on the shipping box and on the warranty registration card Retain this manual for a quick reference to these numbers DISCLAIMER Incompiling this manual Steffes Corporation has used its best judgement based upon infor mation available but disclaims any responsibility or liability for any errors or miscalculations contained herein or any revisions hereof or which result whole or in part from the use ofthis manual or any revisions hereof 1 GENERAL OPERATION The Steffes ETS Double Loop Central Furnace DLF utilizes off peak electricity which is available during times ofthe day or night when the power company can supply electricity more economically By using this off peak electricity for heating the power company may offer a special incentive suchas a reduced electric rate anoff peak heating rate atime of use TOU rate or monthly credits on your heating bill When off peak hours are available the fu
13. on the lower edge Rotate bottom edge of panel out to detach it from the cabinet Step 3 On the right side of the cabinet remove the screws around the limit bar louvre panel 63 See Figure 4 for reference to the location of this panel and the screws Step 4 Slide the sides and back painted outer panels 9 71 amp 73 backwards as one assembly and remove from cabinet Step 5 Use the handles on the brick storage cabinet to move it to its installation location Set aside for now Removal of the limit switches 67 on the FIGURE 4 right side of the brick storage cabinet may be necessary to avoid damage to these switches during the move Brick Storage Cabinet Step 6 Remove the base assembly 50 from its box and move ET it to the installation location Discard the wooden the packaging from the top of the base Locate and set d aside the hardware package shipped on top of the base el 7 assembly H Do NOT install the furnace on its e shipping pallet p Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Installing The Heater conta 11 Adjust the leveling legs 48 on the bottom of the base assembly 50 once it is set in final position set securely on all four legs to prevent rocking of the furnace and or twisting of o The leveling legs must not be extended more than one inch The base MUST the heat exchanger Set the brick storage cabinet on the base assembly 50 tak
14. relating to the equipment Enjoy your new purchase Steffes Corporation Steffes warrants that the Steffes Electric Thermal Storage Heating Appliance is free from defects in materials and workmanship under normal use and service Steffes obligation under this warranty is limited to the repair or replacement of the appliance or parts only which prove to be defective under normal use within five 5 years of the date of installation and which Steffes examination of the returned appliance or part s shall verify to Steffes satisfaction that it is defective The user shall be responsible for any labor costs associated with the repair or replacement of the appliance or part s including the cost of returning the defective appliance or part s to Steffes Corporation This warranty is void if the heating appliance is moved from the premises in which it was originally installed This warranty shall not apply to an appliance or part which has been altered in any respect or improperly installed serviced or used or has been subject to accident negligence abuse or misuse THE ABOVE WARRANTY BY STEFFES IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER WRITTEN OR ORAL EXPRESS OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE The user assumes all risk and liability whatsoever resulting from the use of this heating appliance Inno event shall Steffes be liable for any indirect spec
15. 0 F nominal Troubleshooting Information conta TROUBLESHOOTING GUIDES Before starting any of the troubleshooting procedures check voltage on the load side of all the furnace circuit breakers Also check for 24 VAC between each of the 3 amp low voltage fuses and room thermostat terminal block C position on the charge control circuit board These guides are based upon standard configuration of the furnace For cross reference to number coded components in each procedure Refer to the Exploded View Parts Diagram in this manual Air Delivery A PROBLEM SUPPLY AIR BLOWER WILL NOT RUN WITH FAN ONLY ROOM THERMOSTAT CALL Jumper room thermostat connections z b Supply Air Blower Runs R and G terminal block positions in the charge control circuit board 30 Supply Air Blower Check wall thermostat Will Not Run amp field wiring relay operation 34 Check supply air blower Ok Lower relay in panel Check supply air blower relay coil voltage for 24 VAC Check supply air blower limit switch 54 Ok Ok Open Replace supply air Replace supply air blower blower limit 54 Check unit wiring amp relay 34 supply air blower motor 58 Check for 24 VAC between room thermostat connection C terminal No Voltage block position and the two 3 amp low voltage fuses on the charge No Voltage control circuit board 30 Ok Check unit wiring and or Replace charge con
16. 0 F nominal or greater LEVEL 3 Illuminates when the furnace is targeting its maximum heat storage setting 1350 F nominal All outdoor temperature sensor lights will be illuminated when the furnace is targeting its maximum heat storage setting 6 Furnace Control Panel ona SUMMER WINTER Toggle Switch This toggle switch will vary core charging in the furnace It allows for a reduced heating capacity during the summer months if the user prefers to leave the furnace ON for emergency heat purposes during this time Refer to Table 1 Brick Core Charging Schedule in this manual for more information on charging levels in relation to the position of this switch and outdoor temperature AUTO HIGH LOW Toggle Switch This toggle switch can be used to override the automatic outdoor temperature sensing system AUTO Normal operating position The brick core charge level is controlled automatically by the outdoor temperature sensor The furnace will target a level 3 maximum core charge during an off peak time regardless of the outdoor temperature information it is receiving LOW The furnace targets a minimum of a level 1 1 3 core charge during an off peak time unless the outdoor temperature sensor is signaling for a higher charge level HIGH OVERRIDE Light Power Company Permitting This red light illuminates whenever a peak control override is initiated and remains illuminated for the duration of the override perio
17. 0V std 208V amp 277V opt 240V std 208V opt 240 818 880 69 74 35 49 5 18 X 21 15 X 24 642 lbs 2808 lbs 3450 Ibs 111 37 boxes 12 2 boxes ram PA SOOO FIGURE 17 N im gt T RN i Exploded View Parts Dias edo 6 o A y OD s NI S TERT f V tg booo YL AZO be Po Furnace Parts BI o When ordering replacement parts please include model number and serial number of the furnace DESCRIPTION DLF30B DLF40B ITEM NO ITEM NO Painted Panel Top 5940053 5940053 Galvanized Top 5940055 5940055 1 Blanket Insulation Top amp Front Outer 1050030 1050036 2 Blanket Insulation Top amp Front Middle 1050031 1050037 2 Blanket Insulation Top amp Front Inner 1050032 1050038 Aluminized Top 5940062 5940062 Stainless Steel Panel Back 5940179 5940180 Spacer Bracket 5940092 5940092 Painted Panel Left 5940056 5940057 Aluminized Steel Panel Front 5940270 5940271 Painted Panel Front 5940049 5940050 Galvanized Front 5940059 5940060 Galvanized Air Deflector 5940188 5940189 Galvanized Back amp Sides 5940069 5940035 Heat Storage Brick Whole 590300
18. 2 5903002 Heat Storage Brick Half 5903001 5903001 AirFilter 1159012 1159012 Heating Element 240V 3200W 1014016 1014016 Heating Element 208V 3200W 1014018 1014018 Heating Element 277V 3200W 1014020 1014020 Filter Rack Return Air 1022010 1022010 Sequencer Element Wiring Harness 1040021 1040006 Hard Board Insulation Base 1050060 1050061 Tray Assembly 5940151 5940151 Base Panel Left 5940154 5940154 Electrical Panel 5940176 5940176 Stage 2 Time Delay Sequencer 1019000 1019000 Stage 3 Time Delay Sequencer 1019004 1019004 Charging Sequencers 1019002 1019002 Heat Exchanger High Limit Switch Assembly 54 1040058 1040058 75 VA Control Transformer 1017039 1017039 Volt Reduction Resistor Assembly 1040047 1040047 Charge Control Circuit Board SFIID 1023005 1023005 Control Board Mounting Plate 5940140 5940140 Charge Control Thermostat Assembly 1040033 1040033 Charge Control Knob 1154004 1154004 Blower Relay 1018008 1018008 Fan Speed Resistor 1017030 1017030 Core Blower Wheel 1020002 1020002 Core Blower Cover Plate Assembly 5940120 5940120 Core Blower Motor Assembly 1 6 HP 1360 RPM 1040085 1040085 Core Blower Motor Run Capacitor 1018004 1018004 Front Angle Top 5940046 5940046 Circuit Breaker Standoff 5940034 5940034 P ON Bi ee USB pr Furnace Parts List conta 27 When ordering replacement parts please include model number and serial number of the furnace DESCRIPTION DLF30B DLF40B ITEM NO ITEM NO Circui
19. 9 1040049 Main Wiring Harness 1040023 1040024 Painted Panel Right 5940149 5940150 Aluminized Side Right 5940163 5940164 Painted Panel Back 5940049 5940050 2 Blanket Insulation Back amp Sides Outer 1050033 1050039 2 Blanket Insulation Back amp Sides Inner 1050034 1050040 Aluminized Side Left 5940165 5940166 Temperature Sensing Bulb amp Plate Assembly 1040033R 1040033R Auxiliary Control Board 1302036 1302036 Auxiliary Controller Thermocouple Wire 1010380 1010380 When replacing breakers in a Steffes heating system it is important to replace with like brand heaters Rev 5 11 13 2013 28 Troubleshooting Information BRICK CORE TEMPERATURE TESTING An approximate brick core charge level in the furnace can be measured by taking a millivolt reading on the core temperature sensor This sensor is located on the right side of the storage brick cavity in the limit bar louvre area See drawing reference 68 in the Exploded View Parts Diagram The millivolt reading DC can be compared to the Core Temperature Graph below to correlate the reading to an approximate brick core tempera ture This reading is useful in determining proper core charging of the furnace 1400 1200 Lamy o amp 1000 o Pa BE m 800 ra D e S 600 o a e Q 400 200 0 5 10 15 20 25 30 Millivolts DC o Maximum core charge temperature in normal operation is 135
20. DLF4 STEFFES CORPORATION Manufactured in North America OWNER S AND INSTALLER S MANUAL for Double Loop Central Furnaces LISTED Models DLF30B amp DLFAOB ss201024 Can Pat 2060881 l Table of Contents General Information General Operation ence Rea secs eae ceed sae oa ees tte IU 2 PETMAN OLOS ye 4o nuntius uei med deiude 3 Safety Information Safety Precautions x 2o recte dieitur dtl ate Ga The ease aig oh Tae chest hen dhe eek i epee 4 BuiltansatetyDevicess ic suddetto sidus attaiis adstare ta anita dnte 4 Maintenance and Cleaning ees 4 Furnace Control Panel v hv hh hh ahh hh hh hh hh hh es 56 Operating the Furnace F rnace Start Upz icio eed ether YER ERREUR CY ERE Re GREY REIR eed tin ERREUR ECTS ag Eas YER RA 7 Room Temperature Control 5 ccs iege tite deti dette HAG AE ide S T EN 7 Brick Temperature Control Core Charging cccsssccccssscecesseececseneeceseeseeecseneeeeeseaeeeceenaeecesenaeeesseneeecsenseeesseeeeesseeeeeneneeeeess 7 8 How to Turn the Furnace TOPE and CON iicet tp EH ERE sh ego sau sneveteacasht gevsievensdonsnteaaneesseasastbesuaevansedsuseberacevesisass 8 Installing the Furnace SHIPPING ee sede ea 9 Placerient i nio stat eim bet rnb hians hime a anb lambuntepamiu nme tat 9 Clearance Requirements semaines ime sn ie ttes 10 FURNACE Se upse
21. Electronic Air Filter Figure 15 shows the general concept for connecting an electronic air filter to the furnace Refer to installation instructions of the filter prior to making any connections FRONT VIEW 2 CURREN SENSING RELAY CORE BLOWER RELAY HOUSE BLOWER RELAY Jr it BLUE O TB COMMON D i OF SFI SA wince auto sui To sir CANCEL w CBR Se s POWER eur PEAK HEAT CALL ETS CHRGNG ev 1 LEVEL 2 LEVEL 3 H OVERRIDE DLF CONTROL BOARD Installing The Furnace onra 23 FURNACE FINAL TEST PROCEDURE l 10 11 Check all electrical connections for proper termination placement and do a general inspection for tight connections wire routing etc Energize the furnace If the wall thermostat has an anticipator set the anticipator 0 5 amps Turn up wall thermostat to bring on a call for heat Core blower 38 should run on its high speed with a cold brick core Because the brick core is cold the supply air blower 58 will not run in this mode If the thermostat is equipped with a mode selection switch set to FAN ONLY and check for medium high speed cooling supply blower 58 operation See Figure 16 for switch positions to complete steps 6 7 and 8 FIGURE 16 In the off peak mode and with the outdoor air sensor 64 disconnected jumper sensor connection terminals W amp R of the charge control
22. Exchanger High This limit switch monitors the temperature in the heat In the base of the Limit Switch exchanger of the furnace If the normal operating tempera furnace inside the ture is exceeded this switch will interrupt power to the core electrical panel blower Core Blower High This limit switch monitors the discharge air temperature and In the supply air Limit Switch interrupts power to the core blower if this temperature plenum assembly on exceeds 160 F nominal the blower Supply Air Blower This limit switch monitors the discharge air temperature and In the supply air Limit Switch interrupts power to the supply air blower if this temperature plenum assembly on exceeds 180 F nominal the blower Maintenance and Cleaning The filter in the furnace should be replaced on a regular basis General cleaning of the furnace s cabinet should be conducted at the user s discretion No additional routine maintenance is required Furnace Control Panel 5 Furnace operation is automatic however the user can manually operate it by changing settings on its control panel See Figure 1 for reference to location of the control panel and circuit breakers on the furnace FIGURE 1 FURNACE BASE WITH HEAT EXCHANGER SUPPLY AIR BLOWER PLENUM ASSEMBLY FURNACE CONTROL PANEL O POWERON O OFF PEAK HEAT CALL ETS CHARGING x LEVEL nC LEVEL2 SAO LEVEL3 SUMMEI as SUMA HIGH w
23. F Replace charge control Outdoor Check supply circuit board 30 voltage to the Temperature Faisin Below 55 F Defective Outdoor Set the AUTO HIGH LOW ee 28 Temperature toggle switch on charge bn ir control circuit board 30 to R i high position Set the AUTO HIGH LOW toggle switch to AUTO and the Check secondary SUMMER WINTER toggle switch to WINTER positions on the voltage from control harge control circuit board 30 transformer s 28 1 Remove outdoor sensor wire connected to the G terminal No Voltage position Outdoor temp SENSOR LEVEL 1 light should be ON Remove outdoor sensor wire connected to the B terminal Replace charge control position Outdoor temp SENSOR LEVEL 2 light should be ON circuit board 30 Replace 24 VAC control transformer s 28 Replace outdoor air Replace charge control temperature sensor 64 circuit board 30 Troubleshooting Information conta Ee B PROBLEM FURNACE WILL NOT CHARGE FURNACE HAS NO CORE CHARGE continued This portion of the troubleshooting flow chart is to test operation of the auxilairy control board Furnaces built after January of 1998 were produced with this additional control If a system built before 1998 experiences element failure Steffes recommends that the auxiliary control board be added as a supplemental controller for monitoring core temperatures in systems which have ele ment failure i
24. NIERO O TOW O OVERRIDE UTDOOR SENSO P o ISi joe SM S S L A J op Qo BLOWERS FURNACE CONTROLS CORE CHARGING ELEMENT CIRCUIT BREAKER CIRCUIT BREAKERS POWER ON Light This green indicator light illuminates whenever the furnace is energized OFF PEAK Light This red indicator light illuminates during off peak times which are the times when the furnace is allowed to charge Elements can be ON to store heat in the brick core HEAT CALL Light This yellow indicator light illuminates whenever the furnace is receiving a signal from the wall thermostat to deliver heat ETS CHARGING Light This red indicator light illuminates whenever the heating elements in the furnace are ON Furnace is storing heat in its brick core OUTDOOR TEMP SENSOR Lights These red indicator lights illuminate to designate the brick core charge level the furnace is targeting whenever the elements are allowed to be ON Refer to Table 1 Brick Core Charging Schedule in this manual for more informa tion on charging levels in relation to outdoor temperature and the furnace control panel settings LEVEL 1 Illuminates when the furnace is targeting a heat storage setting of approximately 1 3 core charge 500 F nominal or greater LEVEL 2 Illuminates when the furnace is targeting a heat storage setting of approximately 2 3 core charge 90
25. age circuits must be segregated from low voltage wiring in the furnace To determine the correct wire size required for each circuit feeding the furnace refer to the Unit Specifications section in this manual Itis the responsiblity of the installer to follow all applicable electrical codes and regula tions for the installation Step 1 Remove the electrical panel cover 46 Step 2 Route line voltage wiring through a knockout and into the electrical panel of the furnace Step 3 Make the proper field wiring connections to the furnace breakers See the Line Voltage Wiring Diagrams in this manual for more information on these connections To reduce magnetic fields that can be produced by electrical circuits it is rec ommended to alternate the circuit phases in the furnace See Figure 8 for more information on how to phase connect the circuits FIGURE 8 BLOWERS CONTROLS CIRCUIT _ O l CHARGE CIRCUIT 1 Ls D CHARGE CIRCUIT 2 2 gt CHARGE CIRCUIT 3 aA o CHARGE CIRCUIT 4 E MODEL DLF40 ONLY I EXCEL GELS DESEE ub AS unn wu uuu AA YA tj tm Gt tm t ti t t tH tW N N ke N N N oilieiliel leilie leileilelleile 15A 60A 50A 60A OA 2 Io U2 S I IO SU Sj O S Furnace Circuit Breake
26. area it will be heating Although most of the heating requirements of the space will be satisfied by the heat delivered through the duct system a small amount of the heating requirements will also be satisfied through static heat dissipating through the furnace s warm outside panels In situations where the furnace will not be installed in the area it is intended to heat i e garage it is important to account for the heat lost through its panels by making proper adjustments in sizing of the furnace Un 4 WN In addition to the physical space requirements the weight of the furnace must also be taken into consideration when selecting the installation surface A level concrete floor is the best surface on which to place the furnace but most well supported surfaces are acceptable If in doubt about floor load capacity consult a building con tractor or architect See Figure 2 for furnace and ducting dimensions Po Sa FIGURE 2 s TOP VIEW I 60 33 4 ANis DLF 40B 21 69 3 4 roe 4l DLF 308 60 2 30 O 3 Secr SLOT FOR 39 16 X 25 FILTER RETURN AIR DUCT IS 24 1 2 X 15 A IM Installing The Furnace onra FIGURE 3 i CLEARANCE REOUIREMENTS y am creanance The minimum clearances required when installing the furnace into any area are as follows TOP VIEW Back and Sides 3 inc
27. arging set points other than the standard configuration are preferred the sensor must be specially ordered from the factory Outdoor Sensor Placement The outdoor sensor is shipped inside the supply air blower plenum assembly When installing the sensor please follow these recommended guidelines in relation to placement and wiring gt Optimal placement of the outdoor temperature sensor is on an outdoor surface in a location above ground level where it will not be affected by direct sunlight or other sources of heat or cold gt The outdoor sensor has an 8 foot 4 conductor 300V insulated cable I8AWG If this is not long enough for the installation additional wire can be spliced to this wire Since this is a low voltage circuit standard Class II thermostat wire can be used as extension wire provided it does not enter the line voltage areas of the furnace Outdoor Sensor Mounting and Wiring Connections Step 1 Attach the outdoor temperature sensor 64 to an outdoor surface using its four mounting flanges Step 2 Disconnect power to the furnace and route the low voltage wire from the sensor to the furnace Step 3 Route the wire into the furnace s electrical compartment and up to the charge control circuit board 30 Never install any wiring in the line voltage compartment of the furnace unless it is rated for line voltage Step 4 Connect the sensor to the 4 position terminal strip on the bottom front of the charge control cir
28. ced in the rows recommended for each model The rows recommended simply make for the 2 The purpose of the half brick is to make brick loading easier by evening out the best fit Installing The Furnace o Il FIGURE 7 gt The second to last row front middle brick must be the last brick installed A shim may be used to hold the upper brick in place or it is more easily accomplished by leaving the middle brick in the second to last row pulled about 4 forward from its intended SECOND TO LAST ROW position In this position the IDET ERICK brick will act as a support for the top middle brick Push the front middle brick in the second to last row into place which will at the same time push the middle brick that was left forward into place See Figure 7 for a picture depiction of this procedure INSTALLING THE HEATING ELEMENTS Step 1 After all bricks are loaded insert the heating elements 17 between the brick layers with the cold pins facing up See picture depictition of element termination in Figure 6 for reference to cold pin direction LAST TOP ROW Step 2 Make the heating elements 17 to wiring harness 19 amp 65 connections See Figure 6 for a picture depictition of element termination Use two 3 8 wrenches to ensure tight connections and to avoid twisting the threaded element cold pins off Step 3 Replace the front aluminized steel panel 10 This panel MUST be installed with its air deflectors
29. cuit board 30 The wire is color coded to match the terminal position in which it should be connected White W Green G Black B and Red R See the Low Voltage Wiring Diagram in this manual for a depiction of the location of these terminals Room Thermostat A low voltage thermostat is required for room temperature control with the furnace Steffes has both mechani cal and digital configurations with a heating and cooling sub base available for use with this system Some also provide a room temperature set back option Any thermostat used with this system must be 24 VAC and have the ability to switch 1 2 amp minimum at a 5 anticipator setting Contact the factory for more information on the thermostats available from Steffes In applications where an air conditioning system will be used in conjunction with the furnace the furnace can also be used to control the air conditioning system through the wall thermostat during the cooling months See Figure 13 for information as to how to make room thermostat connections Placement Optimal placement of the room thermostat is on an interior wall where it will not be affected by direct sunlight or other sources of heat or cold Installing The Furnace a PA Mounting and Wiring Connections Step 1 Attach the thermostat to a wall Insulate the opening through which the thermostat wires runs Failure to do so may affect the accuracy of the thermostat Step 2 Disconnect powe
30. d The function of the override indicator light works in conjunction with START and CANCEL toggle switches START and CANCEL Toggle Switches Override Feature Power Company Permitting The furnace has a built in peak override feature This feature allows the heating elements in the furnace to come ON during a peak control time provided the power company permits the use of this option Since not all power companies permit use of the override option all furnaces are shipped with this feature disabled If the feature is enabled in the furnace these toggle switches initiate and cancel the override of a peak control time START Initiates an override of a peak control time allowing the heating elements to come ON The furnace targets a level 1 1 3 core charge during an override cycle If initiating the peak control override feature the override will only last for the duration of the peak control period at which time it resets itself automatically unless the user manually cancels it prior to then The override light will illumniate if the START switch is toggled CANCEL Allows for manual cancellation of a peak override any time during an override cycle An override cycle will automatically cancel itself at the start of the next off peak period The peak override option may not be available in your area Please consult your power company if you are unsure of whether this option is available to you If so and you desire to enable the feature co
31. d safety practices Step 3 Remove the aluminized steel panel 10 by pulling out at the top Step 4 Remove the heating elements 17 and the packing material from the brick core cavity To ensure adequate room for brick loading the top or bottom 1 x 4 nominal wooden core spacer can be used to hold inner brick cavity walls apart The core spacer is packaging material and can be discarded after brick loading is complete Step 5 To minimize the amount of brick debris falling into the core blower place the cardboard packaging material found inside the brick cavity over the core blower opening Step 6 Load the brick 15 one row at a time starting at the back working forward Below is a list of installation tips to aid in the brick loading process FIGURE 6 gt Be sure to remove loose brick debris as the furnace is being loaded to prevent uneven stacking of the bricks gt Use the half brick boxes marked in the proper rows and in the correct positions The half bricks should be loaded in rows 4 and 8 in th DLF30 and in rows 5 and 10 for the DLF40 with row 1 being at the bottom See Figure 6 for the correct position of the half bricks EZ A W HALF BRICK DLF 30 LOAD IN ROWS 4 AND 8 DLF 40 LOAD IN ROWS 5 AND 10 7 UW ANY ARY X y 97 WN ELEMENT TERMINATION 71777 A SN amp stacking From an operation perspective it is not essential they be pla
32. e at 15 F At temperatures above 55 F the furnace will not maintain a core charge however if there is a heat call from the thermostat during off peak times 1 3 of the elements will be energized to provide heat for the duration of the heat call Refer to Table 1 Brick Core Charging Schedule for more information on charging levels in relation to outdoor temperature and the furnace control panel settings If outdoor temperature charging set points other than the standard configuration are pre ferred the sensor must be specially ordered from the factory vg Operating the Furnace onra BRICK CORE CHARGING SCHEDULE Table 1 During brick core charging the heating elements are staged ON and OFF in 6 4kW increments maximum SUMMER WINTER OUTDOORAIR CHARGE kWINPUT MAX INPUT SWITCH POSITION TEMP F LEVEL DLF30B DLF40B F N ominaly Winter 00 Winter Summer Summer Sa eile as E If during off peak hours the wall thermostat calls for heat and the outdoor temperature is above 55 F 1 3 of the elements will be energized for the duration of the heat call The AUTO HIGH LOW toggle switch on the furnace control panel will allow the user to override the automatic charge control system of the furnace In normal operation this switch is set to the AUTO postion Regardless of the position of this switch the brick core charging system in the furnace is designed to respond to the coldest temperature signal it is receiv
33. e resistor of all charging sequencers 26 Check for contact closure on all charging sequencers 26 Disconnect outdoor temperature q 26 sensor 64 connection W Replace charge control terminal block position on charge circuit board 30 control circuit board 30 Check heatin eck heating Not All Out ot All Outdoor elements 17 Temperature Lights ON Three Outdoor Temperature Lights ON Check the outdoor Replace charge control temp SENSOR lights on Check outdoor temperature circuit board 30 charge control circuit board sensor 64 in cold place 30 All three must be ON less than 15 F All mercury bulbs should open All Bulbs Closed Defective Check for 24 VAC on base Replace charge control terminals of all charging circuit board 30 sequencers 26 Replace outdoor Replace charge control temperature sensor 64 No Voltage thermostat 32 Voltage Present Check unit wiring and or replace charge control Replace sequencer circuit board 30 Registering your purchase is an essential step to ensure warranty coverage A Warranty Registration card is included with the Owner s Manual Simply complete detach the bottom portion and return the card today Retain the top portion of the card for your files Your Steffes product is protected by one of the most comprehensive warranties and outstanding service networks in the industry We welcome comments you have
34. f the filter rack assembly Step 7 Connect both the return air and supply air house ducts to the furnace the area where the furnace is located must be installed if not already present In addition a 6 x 6 non closing type register must be cut into the return air duct Refer to the Clear 2 If the furnace is installed in a small enclosed area a minimum of a 24 x 24 opening into ance Requirements section of this manual for more information Installing The Furnace oa IR 8 LINE VOLTAGE ELECTRICAL CONNECTIONS In standard configuration the furnace is wired for connection to 240V but are available with 208V or 277V heating elements as special factory orders However the blowers and furnace controls circuit must always be connected to 240V or 208V The furnace is set up for multiple feed circuits The 60 amp breakers located in the electrical compartment at the base of the furnace feed the core charging element circuits The 15 amp breaker feeds the furnace controls and blowers circuit The furnace s elements and blowers controls circuit can be fed with separate circuits or the blowers controls can be fed from one of the element circuits If single feed of the charging element circuits is desired an optional single feed kit is available from the factory Order item 1309000 The single feed kit enables the furnace to be fed with a single circuit which then splits this circuit internally to each breaker All line volt
35. hat senses outdoor air temperature and communicates this information to the furnace for automatic charge control Peak Override Enables electrical usage in a device that is typically controlled by the power company during an on peak time Some power companies may never permit any controlled devices to be used during an on peak time Others that do may penalize the user by charging a premium on energy consumed during this period 4 Safety Information Spiers PRECAUTIONS DO NOT energize the furnace while disassembled or without ceramic heat storage brick in place i As is true with all heating appliances materials that may produce explosive or flammable gases MUST NOT be used or stored near the furnace 3 Be sure the minimum clearance requirements specified in this manual are never violated 4 This unit may be connected to more than one branch circuit Disconnect power to all circuits before servicing BUILT IN SAFETY DEVICES All Steffes Double Loop Central Furnaces incorporate safety devices to ensure normal operating temperatures are maintained The chart below describes these safety devices DEVICENAME FUNCTION LOCATION ONHEATER Core Charging High These limit switches monitor brick core charging and will In the limit bar panel Limit Switches interrupt power to the heating elements if the normal on the right side of the operating temperature is exceeded Each switch controls brick storage cavity two heating elements Heat
36. he furnace on the electrical panel Control Period On peak time in which the furnace is not allowed to store heat in its brick core Heat Call When room temperature falls below the room s thermostat setting the thermo stat signals the furnace to operate its blowers and deliver warm air into the space to raise the temperature to the desired thermostat set point Heat Exchanger Device in the base of the furnace where the stored heat from the brick core transfers to the duct system for delivery into the living space Manual Charge Control Method of brick core charging regulation where the user must periodically adjust the brick core temperature setting in relation to the outdoor temperature Off Peak The time during the day or night when the power company can supply electricity more economically and may offer a special incentive such as a reduced electric rate or billing credits for the electricity consumed during this time Typically uncontrollable electrical usage is allowed during this time Furnace is allowed to charge or store heat in its brick core during this time The time during the day or night when the power company experiences a high demand for electricity To limit demand certain appliances are controlled to avoid usage by them and or a premium for the electricity consumed during this time may be charged Furnace is not allowed to charge or store heat in its brick core during this time Outdoor Temperature Sensor Device t
37. hes from combustible material Top 6 inches from combustible material Front 36 inches for ease of servicing Furnace Right Side and Air Duct 2 inches Furnace Left Side and Air Duct zero clearance Sides of Furnace Ducts zero clearance 36 MIN CLEARANCE 1 2 MIN CLEARANCE The clearance areas must be kept open and free of debris Do not j place anything on top the furnace If the furnace is installed in a CLEARANCE small enclosed area less than 400 square feet the area must be well ventilated For ventilation purposes a minimum of a 24 X 24 opening must be installed if not already present into the area where the furnace is located In addition a 6 X 6 non closing type 4 register must be cut into the return air duct of the furnace to minimize heat build up in the room See Figure 3 for a depictition of clearance specifications 4 FURNACE SET UP For cross reference to number coded components see the Exploded View Diagram and the Furnace Parts List in this manual Refer to Table 2 in the Shipping section of this manual for a list of items each furnace should contain SUPPLY DUCT FRONT VIEW x 6 X 6 REGISTER IN COLD AIR RETURN Step 1 Unbox the brick storage cabinet Step 2 Remove painted front panel 11 of cabinet by removing the sheet metal screws
38. ial or consequential damages or lost profits This Limited Warranty contains the complete and exclusive statement of Steffes obligations with respect to the heating appliance and any parts thereof The provisions hereof may not be modified in any respect except in writing signed by a duly authorized officer of Steffes The equipment described herein is intended for installation in accordance with applicable local state and national electrical codes and must be installed by a qualified electrician This manual should be retained by owner upon completion of the installation and made available to service personnel as required For Customer Use Please record your model and serial numbers below These numbers are located on the lower right side of the furnace base and on its supply air blower plenum assembly Retain this information for future reference Model No Serial No CORPORATION e STEFFES Highway 22 North Dickinson ND 58601 9413 701 483 5400 DOCUMENT 71200054
39. ing As a result if the toggle switch is set to LOW and the outdoor sensor is calling for a higher brick core temperature setting the furnace will respond to the sensor signal Or should the charge level 1 sensor fail to respond to outdoor temperature the charge level 2 or 3 sensors will initiate core charging This feature provides control redundancy which reduces the chance of having an uncharged or undercharged brick core during cold weather 4 HOW TO TURN THE FURNACE OFF AND ON Since heat calls are unlikely during the summer months you may wish to turn the furnace OFF To do so switch all 60 amp core charging breakers located on the front of the furnace s electrical panel to the OFF down position See Figure 1 for reference to the location of the breakers on the furnace The 15 amp breaker should remain ON at all times as this breaker operates the blowers and all other controls in the furnace It MUST remain ON if using the furnace in conjunction with an air conditioning system To turn the furnace ON switch the breakers to the UP position For users who prefer to maintain a reduced heating capacity during summer months rather than shutting the system off completely the SUMMER WINTER toggle switch should be set to the SUMMER position In standard configuration a SUMMER switch setting enables automatic brick core charging but at a reduced level The outside temperature must drop below 35 F before core charging wi
40. ing care not to damage the wiring har nesses 65 amp 70 The rope gasket around the FIGURE 5 heat exchanger inlet and outlet of the base assembly must be properly adhered and free from damage Damage to any gasketing on the furnace will result in improper unit opera tion and or furnace damage Position wiring harnesses 65 amp 70 and temperature sensing bulb and plate assembly 77 to facilitate routing through bottom right side panel cutout See Figure 5 for reference to wiring harness locations on the furnace MAIN HARNESS CUTOUT FIR L ELEMENT HARNESS HARNESS ROUTING Install the sides and back painted AN RABASSA outer panels 9 71 amp 73 on the brick storage cavity Use the screws found in the hardware package to secure the panels to the cabinet by placing them along bottom edge of the panels To avoid internal wire damage use only blunt tip screws in all areas where screw tips could come in contact with wiring Install the temperature sensing bulb and plate assembly 77 by tightening the screws in a cross pattern until gasket is compressed Do not overtighten Make certain that the capillary tube of the temperature sensing assembly 77 does not come into contact with any live electrical terminals Failure to seal the sensing bulb plate will cause abnormal furnace operation and potential component damage Connect the main and element w
41. iring harnesses 65 amp 70 to the limit switches 67 The switches are marked with a red dot on one side Connect the red wires to the red dot marked side of the switches Connect the black wires to the unmarked side of the switches Installing The Heater cont a Step 13 Connect the brown thermocouple lead wire 79 in the wiring harnesses to the core temperature sensor 68 The yellow wire of the thermocouple lead attaches to the screw stud marked with a yellow dot The red wire attaches to the screw stud marked with a red dot The brown thermocouple lead wire must be routed in a fashion that ensures it will be protected from physical damage and does not come into contact with any live electrical connections in the limit bar area Incorrect polarity on the core temperature sensor will cause the furnace to continue to charge even when a high charge level has been achieved Step 14 Carefully install the limit bar channeling plate 61 to provide air seal around wiring harnesses 65 amp 70 Step 15 Install the limit bar louvre panel 63 5 BRICK LOADING Step 1 Remove the sheet metal screws around the outer edge of the galvanized front panel 12 and set the panel aside Step 2 Carefully lift the three insulation blankets 3 4 amp 5 one at a time and drape them over the top of the furnace Use face mask gloves and long sleeved garments when handling insulation o materials in accordance with generally accepte
42. ll occur Refer to Table 2 Brick Core Charging Schedule in this manual for more information on charging levels in relation to outdoor temperature and the furnace control panel settings Installing The Furnace 9 Q SHIPPING The furnace is shipped disassembled for ease in handling and moving into location where it is to be installed Refer to Table 2 for information on the items shipped with each furnace Table 2 MODEL BRICK ELEMENTS DUCTING See Note 1 See Note 2 See Note 3 DLF30B 28 boxes Whole Brick 3 Box 1 Box Return Air Filter Rack 2 boxes Half Brick 6 Box 1 Box Supply Air Blower Plenum Assembly 1 Hardware Package See Note 4 DLF40B 37 boxes Whole Brick 3 Box 12 1 Outdoor Temperature Sensor See Note 5 2 boxes Half Brick 6 Box NOTES 1 The furnace ships in two sections brick storage cavity and base assembly banded to one pallet Each brick box weighs approximately 72 Ibs each The elements are shipped inside the brick storage cabinet of the furnace The hardware package is shipped in the base assembly portion of the furnace The outdoor temperature sensor is shipped in the supply air blower plenum assem bly box PLACEMENT The physical dimensions of the furnace along with the clearances required must be taken into consideration when choosing a location for the furnace The minimum area needed for the installation of a furnace is 100 square feet The best installation location for the furnace is in an
43. ntact your power company for instructions Operating the Furnace 7 Q FURNACE START UP On start up of the furnace you may experience some odors relating to first time operation of the heating compo nents There may also be an odor associated with dust accumulation in the system if the furnace is shut down for an extended period of time Upon restart allowing the furnace to charge to its maximum brick core charge level will help expel these odors in a timely manner During operation it is normal for the furnace like any heating system to produce expansion noises These noises are the result of the internal components reacting to the temperature changes they are exposed to ROOM TEMPERATURE CONTROL Room temperature is adjusted at the wall thermostat With a heat call to the thermostat the core blower in the furnace is energized to circulate hot brick core air through the furnace s heat exchanger The core blower automatically adjusts its speed low or high in relation to the brick core temperature The blower operates in low speed with a hot brick core and in high speed with lower brick core temperatures After the brick core air warms the heat exchanger the supply air blower is energized The supply air blower circulates the room air through the heat exchanger to warm it and then delivers it back into the living space through the duct system The delay between the core blower operating and the supply air blower being energi
44. op and bottom 2 lights on 0 VAC middle to top 24 VAC middle to bottom No Voltage 3 lights on 0 VAC middle to top and bottom Fuse Ok Incorrect on Check for 24 VAC between room thermostat connection C terminal block position and the Replace charge two 3 amp low voltage fuses on the charge control thermostat Check unit wiring and control circuit board 30 the charge control No Voltage circuit board fuses Present Replace charge control Incorrect Wiring circuit board 30 or Open Fuse s Check control transformers 28 Repair wiring or replace fuses Replace charge control circuit board 30 NOTE If fuses open again change charge control circuit i5 board 30 Replace charge control circuit board 30 1 With outdoor temperature sensor wiring disconnected the SUMMER WINTER toggle switch on charge control circuit board 30 set to the WINTER position and the AUTO HIGH LOW toggle switch set to AUTO jumper outdoor sensor terminal block positions W amp R LEVEL 3 OUTDOOR TEMP SENSOR light on charge control circuit board 30 should be off 2 Jumper W R amp B terminal block position LEVEL 2 AND 3 OUTDOOR TEMP SENSOR lights on charge control circuit board 30 should go off Defective Replace charge control Replace outdoor circuit board 30 temperature sensor 64 Troubleshooting Information conta B PROBLEM FURNACE WILL NOT CHARGE FURNACE
45. or 38 amp unit wiring Ok Replace core blower relay 34 Replace charge control circuit board 30 Remove supply air plenum cover Check heat exchanger temperature should be 135 F minimum with core blower running Will Not Close Replace supply air blower switch 52 Check supply air blower limit 54 core blower motor 38 amp voltage between blue amp blue red wires on supply air blower motor 58 supply cable NOTE In heating mode the supply air blower motor 58 runs on the normally closed relay contact Relay is not pulled in for heating Troubleshooting Information conta Core Charging A PROBLEM FURNACE OVERCHARGES ON WARM DAY t All Outdoor Temperature Lights Are ON Regardless of Outdoor Temperature Check operation of outdoor temperature lights on charge control circuit board 30 Lights Work Properly With wires disconnected check ohm Defective M values of the resistor 66 Must be 175 Replace Check AU LOTO OW toggle switch Uni resistor 66 should not be in HIGH mode on warm days ohm center to top amp center to bottom Check for 32 VDC betw een room thermostat Check VAC on resistor 66 from middle to top and middle to connection C terminal block position and top low bottom Reults vary depending on number of charging lights Present voltage 1 2 amp fuse on charge control circuit on board 30 Check fuse 1 light on 24 VAC middle to t
46. ove the jumper between the W and R outdoor sensor connection terminals and reconnect the outdoor air temperature sensor 64 Set the selector switches to the AUTO and WINTER positions Replace the electrical panel cover 46 make certain all fuses and or circuit breakers are labeled in the service panel Present owner with the manual and warranty information The owner s registration card must be com pleted and returned to Steffes Corporation to ensure warranty coverage The owner should retain the top portion of the card for their records Take the time needed to instruct the owner on how to operate the system 4 Furnace Specifications Charging Circuit Service Entrance For 240V Systems Max Blower Load Charging Input Element Voltage Blowers and Furnace Controls Voltage Storage Capacity kWh BTU Furnace Dimensions Height Width without ducting Depth Air Duct Dimensions Supply Air Duct W X D opening Return Air Duct H X D opening Furnace Weight approximate Brick Weight approximate Installed Weight approximate Number of Bricks Whole Brick Half Brick 3 50 Amp circuits 120AmpX1 25 150Amp 6 Amps 240V systems 28 8 kW 240V std 208V amp 277V opt 240V std 208V opt 180 614 160 60 35 49 5 18 X21 15 X 24 590 Ibs 21601bs 2750 Ibs 84 28 boxes 12 2 boxes 4 50 Amp circuits 160AmpX1 25 200Amp 6 Amps 240V systems 38 4 kW 24
47. ow 5 on temp rise COM N O m clois 3 ICOM B WHITE BLACK eal El CORE Ed S No CH z BLOWER a 5 5 n a LAL 2 m m th xe ti 2 ps e e en wh n x e STAGE 1 NO a BE BB fF De a amp SEE NOTE 2 CHARGING SEQUENCER S427 55 65 65 65 y sa COM BLUE seg gs i pi eS o sa e I moO Po po fo tO UH HOUSE N C T nne n On nne pl e B d BLOWER I AM o leifer lete stelle le Boke ER I5A 6 60A 60A 60A STAGE2 aa CHARGING SEQUENCER BLUE BLACK N O 240v 24v t 75VA E bd M TRANSFORMER L An il h EL No j LT oO STAGE 3 CHARGING SEQUENCER BLACK LAC pons BEUE looo BROWN GROUND LUGS NOTES 1 Supply air blower speed selection terminals wiring 2 Line voltage field wiring connections see Figure 8 Installing The Furnace onra DLF30B AND DLF40B 277V UNITS ONLY FIGURE 11
48. r to the furnace and route low voltage wire between the thermostat and the furnace Step 3 Route the wire into the furnace s electrical compartment and to the front of the charge control circuit board 30 Never install any wiring in the line voltage compartment of the furnace unless it is rated for line voltage Step 4 Connect the thermostat to the 4 position terminal strip on the top front left corner of the charge control circuit board 30 labeled R W G and C See Figure 13 for reference to room thermostat connections to the furnace Step 5 Ifthe thermostat has an anticipator set it to 5 amps FIGURE 13 TF TIE Tt TFF zz mm With Uncontrolled m With Utility Controlled 50 60 70 80 Ai C diti E 50 60 70 80 Air Conditioning RWGY ir nditionin RWY o e 0 0 Q TO OUTDOOR AIR CONDITIONING TU OUTDOOR UNIT AIR CONDITIONING UNIT SEE NOTE 1 bodd Bessg Bood Bo osg RWGC YY2Y3X RWGC YY2Y3xX FRONT VIEW x FRONT VIEW OF SFIN OF SFIN A ew BLUE WHITE TH LOAD A POWER BLUE WHITE q0 nap err PEAK BLUE CONTROL DFF PEAK BLUE CONTROL HEAT CALL DEVIGE HEAT CALL DEVICE 3A ETS CHRGNG 3A ETS CHRGNG A LEVEL 1 LEVEL 1 GZ LEVEL 2 LEVEL 2 LEVEL 3 LEVEL 3 3A winger Auto 3 WINTER Auto
49. rnace converts electricity to heat which is then stored inits ceramic brick core The amount ofheat stored in the brick core varies in relation to outdoor temperature owner preference utility peak conditions and the requirements of the space being heated This stored heat becomes available for space heating needs as determined bythe wall thermostat that is strategically located in the living space When the wall thermostat senses a need for heat the core blower and supply blower in the furnace operate The core blower circulates the hot brick air and warms the heat exchanger located in the base of the furnace The supply air blower circulates roomair through the exchanger where it is heated and then delivers it to the conditioned space General Information conta 3 TERMINOLOGY This manual contains terms which may need explanation The table below lists some of these terms and a brief description of each TERM DEFINITION Automatic Charge Control Method of brick core charge regulation where a sensor monitors outdoor temperature to automatically adjust the brick core temperature setting in relation to the outdoor temperature Brick Core Charge Level The amount of heat that is stored in the heater s brick core Charge Period Off peak time in which the furnace is allowed to store heat in its brick core Control Panel Contains the toggle switches to adjust and display lights to indicate furnace operation Located on the lower front of t
50. rs Line oltage Wiring Diagrams DLF30B 240V OR 208V UNITS ONLY FIGURE 9 SUPPLY AIR BLOWER Installing The Furnace onra HIGH BLACK 10uf MED HIGH SELT oW HEATING ELEMENTS Cap MED LOW RED STAGING ROW LOW 350 COM 2 LI LIU TOP 1 8 eo SEE J NOTE 1 3 7 350 2 6 LN a Qly Raq RO 1 5 350 e amp E ba lt Ou Ola Z5 m i A X ge aa 350 WHITE oi ola 2 3 m ee 1 2 law 3 f 350
51. s disabled An open power company switch will signal an off peak time to the furnace charging is enabled A closed power company switch will signal an on peak time to the furnace charging is disabled N C FIGURE 14 ks 24 VAC Te STAT SOLENOID oo SSeog RWGC_ YY2Y3 FRONT VIEW OF SFI L POWER eur PEAK HEAT CALL ers CHRGNG LEVEL 1 LEVEL 2 LEVEL 3 Optional Features SENSING RELAY TO HEATING SPEED ON HOUSE BLOWER J These recommended wiring methods reflect only devices that accept a remote low voltage power source Refer to the specific installation instructions for the device before making any connections to the furnace CORE BLOWER RELAY HOUSE BLOWER RELAY BLUE RED Control of Other Loads The furnace can be used to control other loads in the application To do so connect the other loads using low voltage wire to the Y positions of the terminal block CONTROL RELAY located on the upper right front corner of the charge uu control circuit board See the Low Voltage Diagram in FIGURE 15 24 VAC mood DOOS RWGC YY2Y3Xx the manual for reference to these terminal block posi tions Connecting a Humidifier Figure 14 shows the general concept for connecting a humidifier to the furnace Refer to installation instructions of the humidifier prior to making any connections Connecting an
52. t Breaker Bracket 1024010 1024010 15 Amp Circuit Breaker Siemens Brand 1024000R 1024000R 15 Amp Circuit Breaker GE Brand 1024012R 1024012R Blower Cover Assembly 1190019 1190019 60 Amp Circuit Breaker s 208V amp 240V Siemens Brand 1024002R 1024002 60 Amp Circuit Breaker s 208V amp 240V GE Brand 1024013R 1024013R 60 Amp Circuit Breaker s 277V GE Brand 1024014 1024014 Electrical Panel Cover 5940174 5940175 Bottom Cover Panel Base 5443022 5443022 Leveling Leg 5575010 5575010 Base Panel Right 5940155 5940155 Base Assembly 5941133 5941133 Bottom Radiant Heat Shield 5443030 5443030 135 F Blower Switch 1024008 1024008 170 F Core Blower Limit Switch 1012009R 1012009R 190 F Supply Air Blower Limit Switch 1012012R 1012012R Supply Air Blower Wiring Harness 1040004 1040004 Supply Air Blower Assembly with Wheel 1021000 1021000 Motor Mount Bracket Call Factory Call Factory Supply Air Blower Motor Assembly 1 2 HP 1075 RPM 1040086 1040086 Supply Air Blower Motor Run Capacitor 1018006R 1018006R Supply Air Blower Plenum Assembly 1022008 1022008 Limit Bar Channeling Plate 5940167 5940167 Base Panel Back 5940156 5940156 Limit Bar Louvre Panel 5940152 5940153 Outdoor Temperature Sensor Assembly 1040031 1040031 Element Limit Wiring Harness 1040022 1040005 Charge Control Resistor 1017027 1017027 Core Charging High Limit Switch Assembly 1040012R 1040012R Core Temperature Sensor 1043050 1043050 Core Blower Speed Control Assembly 104004
53. t tt eie e T eS o E ete SAA as ee Sut eio SRA SAAN Ast eive Sa aS ae Ud 10 12 Brick Loading conn dee edv eei erede dede eade 12 13 Installingthe Heating Blements 5 1 ER ao ue d S reps 13 Ducting iocos ac nee eene 13 14 Line Voltage Electrical Connections 5 eee tette te tee iti tidie tene teta 15 18 Low Voltage Electrical Connections n csse needed eie ite idee dede et ee idee eiiis 1922 Purnace Final Test Procedure 1 5 2 bie fene io an biet iint ieiuna etes 23 Furnace Specifications HH HH 24 Exploded View Parts Diagram 25 Furnace Parts List ennn 2627 Troubleshooting Information Brick Core Temperature Testing edo ee GR EGER EGRE HERRERA E Per duad 28 Tioubleshooting Guides ice tete te ente inta de deae S 29 34 Warranty 2 General Information This manual provides information for correct installation procedures and electrical connections for Steffes ETS Double Loop Furnaces Models DLF30B and DLF40B The information in this manual will help you utilize the product s many features and ensure many years of safe reliable operation Read all the information contained within this manual before installing the system Store this manual in a safe place for future reference Assembly of and or service to these units should be performed only by a qualified electrician in accordance with information contained herein and in accordance with national state and local electrical codes This
54. trol replace control circuit board 30 transformer 28 B PROBLEM Core Blower Jumper room thermostat Does Not Run connections R and W terminal block positions on the charge control circuit board 30 Core Blower Runs Repair room thermostat or field wiring Check for 24 VAC between room thermostat connection C terminal block position and the two 3 amp low voltage fuses on the charge control circuit board 30 Check wire connections below charge control circuit board 30 and or change the charge control circuit board 30 Check unit wiring and or replace defective control transformer 28 Low or no core charge or core blower wheel 36 problem 30 Troubleshooting With room thermostat call for heat check Lights Off LED s on charge control circuit board panel 30 POWER ON amp HEAT CALL lights must both be ON Check for contact closure on supply air blower switch 52 Information FURNACE WILL NOT DELIVER HEAT i Lights On Core Blower Does Not Run Core Blower Runs Check for core blower motor 38 operation Check core blower relay operation 34 Top relay in furnace electrical panel Inoperable Check core blower relay coil voltage for 24 VAC Check heat exchanger and core blower limit switches 27 amp 53 amp core blower speed switch 69 Defective Replace defective switch es Check core blower mot
55. zed ensures only warm comfortable even heat is being delivered into the living area Intermittent supply air blower operation may occur with lower brick core temperatures in an effort to maintain a constant temperature and even distribution of heat into the living area Some thermostats incorporate a room temperature set back feature which allows for room temperature to automatically be set back a specific number of degrees at specified times If using a thermostat with this feature in a program where the power company has 8 or more consecutive hours of control it is important to bring the room temperature back to the desired occupied temperature a minimum of three 3 hours before the off peak charge period ends This will ensure optimum heat storage for maintaining the desired room temperature throughout the on peak control period BRICK TEMPERATURE CONTROL CORE CHARGING The amount of heat stored in the brick core of the furnace is regulated automatically in relation to outdoor tem perature and to its control panel settings The outdoor temperature sensor that ships with the furnace as standard equipment MUST be mounted outside It provides temperature information to the furnace for proper brick core charging In standard configuration from the factory the outdoor sensor signals the furnace to maintain a level 1 1 3 brick core charge at a 55 F outside temperature a level 2 2 3 core charge at 35 F and a level 3 maximum core charg

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