315AAV/JAV Variable Speed Induced---Combustion Deluxe 4---Way Multipoise Furnace Installation Start--up, Operating, and Service and Maintenance, Instructions Series 140/E SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 2 Check Safety Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS ! DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify hazards which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. 1. Use only with type of gas approved for this furnace. Refer to the furnace rating plate. 2.
15A A08471 Fig.
INTRODUCTION Boulevard, Etobicoke (Toronto), Ontario, M9W 1R3 Canada Combustion and Ventilation Air The Series 140/E 4--way multipoise Category I fan--assisted furnace is CSA (formerly A.G.A. and C.G.A.) design--certified. A Category I fan--assisted furnace is an appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber and/or heat exchanger. The furnace is factory--shipped for use with natural gas.
(664mm) 26-1/8" (FLUE COLLAR) (733mm) 28-7/8" (641mm) 25-1/4" 22-9/16" (573mm) A JUNCTION BOX LOCATION D F 5-15/16" (22mm) 7/8" DIA ACCESSORY 13/16" (21mm) 4-13/16" (122mm) 2-7/16" (62mm) 1-5/16" (33mm) 1-1/8" (29mm) 8-9/16" (217mm) 1/2" DIA THERMOSTAT WIRE ENTRY AIRFLOW 19" (483mm) OUTLET 1/2" DIA. K.O.THERMOSTAT WIRE ENTRY (13mm) 1-3/4" DIA.
THE BLOWER IS LOCATED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPWARD. 315A THE BLOWER IS LOCATED TO THE RIGHT OF THE BURNER SECTION, AND AIR CONDITIONED AIR IS DISCHARGED TO THE LEFT. THE BLOWER IS LOCATED TO THE LEFT OF THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED TO THE RIGHT. THE BLOWER IS LOCATED ABOVE THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED DOWNWARD A02097 Fig.
! CAUTION PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD Improper use or installation of this furnace may result in premature furnace component failure. This gas furnace may be used for heating buildings under construction provided that: 18-IN. (457.2 mm) MINIMUM TO BURNERS A93044 Fig. 5 -- Installation in a Garage ! --The furnace is controlled by a thermostat. It may not be “hot wired” to provide heat continuously to the structure without thermostatic control.
Table 2 – Minimum Free Area Required for Each Combustion Air opening of Duct to Outdoors FURNACE INPUT (BTUH) 44,000 66,000 88,000 110,000 132,000 154,000 TWO HORIZONTAL DUCTS (1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW) Free Area of Opening Round Duct and Duct Dia. Sq. In. (Sq. mm) In. (mm) 22 (14194) 6 (152) 33 (21290) 7 (178) 44 (28387) 8 (203) 55 (35484) 9 (229) 66 (42580) 10 (254) 77 (49677) 10 (254) SINGLE DUCT OR OPENING (1 SQ. IN./3,000 BTUH) (734 SQ.
A 1 SQ IN. PER 4000 BTUH* INTERIOR HEATED SPACE 1 SQ IN. PER 4000 BTUH* E 12″ (305mm) MAX C DUCT TO OUTDOORS 12" MAX (305mm) 1 SQ IN. PER 1000 BTUH* IN DOOR OR WALL UNCONFINED SPACE 6" MIN (152mm) (FRONT)Ü 1 SQ IN. PER 1000 BTUH* IN DOOR OR WALL G 12" MAX (305mm) 12″ MAX (305mm) CIRCULATING AIR DUCTS VENT THROUGH ROOF CLEARANCE IN FRONT OF COMBUSTION AIR OPENINGS SHALL BE AT LEAST 3 IN. 1 SQ IN.
315A The Known Air Infiltration Rate Method shall be used, if the infiltration rate is known to be: 1. Less than 0.40 ACH and 2. Equal to or greater than 0.10 ACH Infiltration rates greater than 0.60 ACH shall not be used. The minimum required volume of the space varies with the number of ACH and shall be determined per Table 3 or Equations 1 and 2. Determine the minimum required volume for each appliance in the space and add the volumes together to get the total minimum required volume for the space.
Leveling Legs (If Desired) In upflow position with side return inlet(s), leveling legs may be used. (See Fig. 10.) Install field--supplied, 5/16 X 1--1/2 in. (8 X 38 mm) (max) corrosion--resistant machine bolts, washers and nuts. NOTE: Bottom closure must be used when leveling legs are used. It may be necessary to remove and reinstall bottom closure panel to install leveling legs. To remove bottom closure panel, see Item 1 in Bottom Return Air Inlet section in Step 1 above. To install leveling legs: 1.
FURNACE (OR COIL CASING WHEN USED) A COMBUSTIBLE FLOORING PLENUM OPENING D B DOWNFLOW SUBBASE FLOOR OPENING SHEET METAL PLENUM FLOOR OPENING 315A C A96285 A96283 Fig. 12 -- Furnace, Plenum, and Subbase Installed on a Combustible Floor Fig. 11 -- Floor and Plenum Opening Dimensions Roll--Out Protection Provide a minimum 17--3/4--in. X 22--in. (451 X 559 mm) piece of sheet metal for flame roll--out protection in front of burner area for furnaces closer than 12--in.
Table 4 – Opening Dimensions -- In.
Supply Air Connections For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for possible openings using light assistance or a probe can be inserted for sampling the air stream. The cover attachment shall prevent leaks. Upflow and Horizontal Furnaces Connect supply--air duct to flanges on furnace supply--air outlet.
315A METHOD 2 USE (42) #8 x 3/4 (19 mm) SHEET METAL SCREWS TYPICAL FOR EACH STRAPS.THE STRAPS SHOULD BE VERTICAL AGAINST THE FURNACE SIDES AND NOT PULL AWAY FROM THE FURNACE SIDES. METHOD 1 FOLD ALL STRAPS UNDER FURNACE AND SECURE WTH (42) #8 x 3/4 (19 mm) SHEET METAL SCREWS (2 SCREWS IN SIDE AND 2 SCREWS IN BOTTOM). A03176 Fig.
315A A02075 Fig. 18 -- Upflow Return Air Configurations and Restrictions A02163 Fig. 19 -- Downflow Return Air Configurations and Restrictions A02162 Fig.
Table 5 – Air Delivery -- CFM (With Filter)* 070--- 12 †† Operating Mode Low Heat High Heat †† †† 090--- 16 1--- 1/2--- Ton Cooling 2--- Ton A/C Cooling 2--- 1/2--- Ton A/C Cooling 3--- Ton A/C Cooling 3--- 1/2--- Ton A/C Cooling Maximum Low Heat High Heat †† †† 110--- 20*** 1--- 1/2--- Ton A/C Cooling 2--- Ton A/C Cooling 2--- 1/2--- Ton A/C Cooling 3--- Ton A/C Cooling 3--- 1/2--- Ton A/C Cooling 4--- Ton A/C Cooling Maximum Low Heat High Heat †† †† †† 135--- 22 2--- Ton A/C Cooling 2--- 1/2--
Return Air Connections ! WARNING FIRE HAZARD A failure to follow this warning could cause personal injury, death and/or property damage. 315A Never connect return--air ducts to the back of the furnace. Follow instructions below. Downflow Furnaces The return--air duct must be connected to return--air opening (bottom inlet) as shown in Fig. 3. DO NOT cut into casing sides (left or right). Side opening is permitted for only upflow and certain horizontal furnaces.
GAS SUPPLY MANUAL SHUTOFF VALVE (REQUIRED) SEDIMENT TRAP UNION A02035 Fig. 23 -- Typical Gas Pipe Arrangement ELECTRICAL CONNECTIONS ! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Blower access panel door switch opens 115--v power to control. No component operation can occur. Do not bypass or close switch with panel removed. 2” (51mm) A05028 Fig. 21 -- Right Side Gas Entry Example 1 See Fig.
115--V Wiring Verify that the voltage, frequency, and phase correspond to that specified on unit rating plate. Also, check to be sure that service provided by utility is sufficient to handle load imposed by this equipment. Refer to rating plate or Table 7 for equipment electrical specifications. U.S. Installations: Make all electrical connections in accordance with National Electrical Code (NEC) ANSI/NFPA 70--2006 and any local codes or ordinances that might apply.
TWO 315A A02099 Fig. 24 -- Relocating J--Box ! WARNING FIRE OR ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, death, or property damage. If field--supplied manual disconnect switch is to be mounted on furnace casing side, select a location where a drill or fastener cannot damage electrical or gas components. 1. Select and remove a hole knockout in the casing where the electrical box is to be installed.
ACCESSORIES 1. Electronic Air Cleaner (EAC) Connect an accessory Electronic Air Cleaner (if used) using 1/4--in female quick connect terminals to the two male 1/4--in quick--connect terminals on the control board marked EAC--1 and EAC--2. The terminals are rated for 115VAC, 1.0 amps maximum and are energized during blower motor operation. (See Fig. 27.) 2. Humidifier (HUM) Connect an accessory 24 VAC, 0.5 amp.
115 VAC Output to HSI & Inducer ECM Motor harness Connector VS HSI HI LO Future Use PL3 PL2 W2 Y1 DHUM G Com W/W1 Y/Y2 24V R EAC-1 STATUS CODE 315A NEUTRAL-L2 EAC-2 LEDS SEC-2 SEC-1 PL1 COMM SW-1 PL4 SW3 CF L1 12 Pin Inline Connector FUSE 3-AMP PL7 ACRDJ PL9 HUM OAT 24 VAC Hum Output (0.5 AMP MAX) ACRDJ Jumper A B C D Model Plug 1-AMP@115 VAC 115 VAC EAC Input (1.
! WARNING CARBON MONOXIDE POISONING HAZARD 315A Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death. The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation: 1. Seal any unused openings in venting system. 2.
315A See notes 2, 5, 8, 10, 11 and 12 on the page following these figures See notes 1, 2, 3, 4, 6, 8, 9, 10, 12, 13 and 15 on the page following these figures A03179 A03178 Fig. 29 -- Two--Stage Furnace with Two--Speed Air Conditioner Fig. 31 -- Two--Stage Furnace with Two--Speed Heat Pump (Dual Fuel) See notes 1, 2, 4, 11, 14, 15, and 16 on the page following these figures See notes 1, 2, 4, 6, 7, 9, 10, 11, and 15 on the page following these figures A03180 A03181 Fig.
315A 7 See notes 2, 11, and 12 on the page following these figures See notes 1, 2, 3, 4, 12, 13, 14, 15, and 17 on the page following these figures A03182 A03183 Fig. 33 -- Dual--Fuel Thermostat with Two--Stage Furnace and Two--Speed Heat Pump Fig. 34 -- Two--Stage Thermostat with Two--Stage Furnace and Two--Speed Air Conditioner See notes 1 and 2 on the page following these figures A03184 Fig.
4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 27 315A 1. 2. 3. NOTES FOR FIGURES 28--35 Heat pump MUST have a high pressure switch for dual fuel applications. Refer to outdoor equipment Installation Instructions for additional information and setup procedure. If the heat pump date code is 1501E or earlier, select the “ZONE” position on the two--speed heat pump control. Heat pumps having date codes 1601E and later do not have or require a “ZONE” selection.
CHIMNEY INSPECTION CHART For additional requirements refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1 and ANSI/NFPA 211 Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances in the U.S.A. or to the Canadian installation Code CSA-B149.1 in Canada. Crown condition: Missing mortar or brick? Rebuild crown. Yes 315A No Is chimney property lined with clay tile liner? No Yes Is liner and top seal in good condition? No Repair liner or top seal or reline chimney as necessary.
lined with a UL listed (ULC listed in Canada) metal liner or UL listed Type--B vent. Relining with a listed metal liner or Type--B vent is considered to be a vent--in--a--chase. If a metal liner or Type--B vent is used to line a chimney, no other appliance shall be vented into the annular space between the chimney and the metal liner.
Table B—Minimum Allowable Input Rating of Space--Heating Appliance in Thousands of Btuh per Hour The vent connector can exit the door through one of five locations on the door. ! INTERNAL AREA OF CHIMNEY 315A VENT HEIGHT FT. (M) SQ. IN. (SQ.
5A SEE NOTES: 1,2,4,7,8,9 on the page following these figures SEE NOTES:1,2,3,4,5,7,8,9 on the page following these figures A03208 A03210 Fig. 37 -- Upflow Application -- Vent Elbow Up Fig. 39 -- Downflow Application -- Vent Elbow Up then Left SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures SEE NOTES: 1,2,3,4,7,8,9 on the pages following these figures A03209 A03211 Fig. 38 -- Upflow Application -- Vent Elbow Right Fig.
SEE NOTES: 1,2,4,7,8,9 on the page following these figures A03213 315A Fig. 43 -- Horizontal Left Application -- Vent Elbow Left SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207 Fig. 41 -- Downflow Application -- Vent Elbow Left then Up SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03214 Fig. 44 -- Horizontal Left Application -- Vent Elbow Right then Up SEE NOTES:1,2,3,4,5,7,8,9 on the page following these figures.
SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03219 Fig. 48 -- Horizontal Right Application -- Vent Elbow Left then Up SEE NOTES: 1,2,4,5,7,8,9 SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A02068 A03216 Fig. 49 -- Horizontal Right Application--Vent Elbow Left Fig.
1. 2. 3. 4. 5. 6. 7. 8. 9. 315A 10. Venting Notes for Fig. 37--49 For common vent, vent connector sizing and vent material: United States----use the NFGC Canada----use the CAN/CSA--B149.1--05 Immediately increase to 5--in. (102 mm) or 6--in. (152 mm) vent connector outside furnace casing when 5--in. (127 mm) vent connector is required, refer to Note 1 above.
A04129 Fig. 52 -- Knockout Pulled Loose A04128 Fig. 51 -- Rounded End of Knockout 35 315A A04127 Fig.
REGULATOR COVER SCREW PLASTIC ADJUST SCREW ON/OFF SWITCH REGULATOR SPRING 1/2˝ NPT INLET INLET PRESSURE TAP HIGH STAGE GAS PRESSURE REGULATOR ADJUSTMENT LOW STAGE GAS PRESSURE REGULATOR ADJUSTMENT 315A MANIFOLD PRESSURE TAP 1/2˝ NPT OUTLET A04130 A04167 Fig. 53 -- Hammer and Screwdriver Used for Knockout Fig. 55 -- Redundant Automatic Gas Control Valve BURNER ORIFICE A04131 A93059 Fig. 54 -- Remove Knockout with Hammer Fig.
HOOK-AROUND AMMETER R Y W G 10 TURNS FROM UNIT 24-V CONTROL TERMINALS EXAMPLE: 5.0 AMPS ON AMMETER 10 TURNS AROUND JAWS = 0.5 AMPS FOR THERMOSTAT ANTICIPATOR SETTING Component test sequence is as follows: a. Inducer motor starts on high--speed and continues to run until Step d. of component test sequence. b. Hot surface igniter is energized for 15 sec., then off. c. Blower motor operates for 15 sec. d. Inducer motor goes to low--speed for 10 sec., then stops. e.
Table 8 – Furnace Setup Switch Description SETUP SWITCH NO.
Table 9 – Altitude Derate Multiplier for U.S.A. ALTITUDE FT. (M) 0–2000 (0--- 610) 2001–3000 (610--- 914) 3001–4000 (914--- 1219) 4001–5000 (1219--- 1524) 5001–6000 1524--- 1829) 6001–7000 (1829--- 2134) 7001–8000 (2134--- 2438) 8001–9000 (2438--- 2743) 9001–10,000 (2743--- 3048) PERCENT OF DERATE DERATE MULTIPLIER FACTOR* 0 1.00 8–12 0.90 12–16 0.86 16–20 0.82 20–24 0.78 24–28 0.74 28–32 0.70 32–36 0.66 36–40 0.
NOTE: Blower access door must be installed when taking temperature rise reading. Leaving blower access door off will result in incorrect temperature measurements. ! e. Repeat Steps a through c as required to adjust for high heat temperature rise. f. When correct high heat input rate and temperature rise is achieved, turn gas valve ON/OFF switch to OFF. g. Release blower access door switch. h. Remove manometer or similar device from gas valve. i. Re--install manifold pressure tap plug in gas valve.
for Low Speed or High Speed cooling. See Table 5--Air Delivery -- CFM (With Filter ). Depending on the model size, the cooling airflow can be adjusted from 1. tons nominal cooling to 3 ., to 4 or to 6 tons of nominal cooling based on 350 cfm ton. The cooling airflow is adjusted by turning Setup switches SW2--1, SW2--2 and SW2--3 either ON or OFF. Select the required airflow from Fig. 63. Fig. 63 is based on 350 CFM per ton. For airflow at 400 CFM per ton, turn Setup SW1--5 ON (See Table 8 and Fig.
315A A08464 Fig.
SECONDS G FOR 1 REVOLUTION 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 1 Cu Ft. 360 327 300 277 257 240 225 212 200 189 180 171 164 157 150 144 138 133 129 124 120 116 113 109 106 103 100 97 95 92 90 88 86 84 82 80 78 76 75 73 SIZE OF TEST DIAL 2 Cu Ft. 5 Cu Ft.
Table 12 – Orifice Size and Manifold Pressure (In. wc) for Gas Input Rate (Tabulated Data Based on 22,000 Btuh High--Heat/14,500 Btuh for Low--Heat per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea Level) ALTITUDE RANGE FT. (M) 315A USA and Cana da 0 to 2000 (0 to 610) ALTITUDE RANGE FT. (M) USA and Canada U.S.A. Altitudes 2001 to 3000 (610 to 914) or Canada Altitudes 2001 to 4500 (610 to 1372) ALTITUDE RANGE FT. (M) USA Only 3001 to 4000 (914 to 1219) ALTITUDE RANGE FT.
Table 12 -- Orifice Size and Manifold Pressure (In. wc) for Gas Input Rate (Con’t.) (Tabulated Data Based on 22,000 Btuh High--Heat/14,500 Btuh for Low--Heat per Burner, Derated 4 Percent for Each 1000 Ft. Above Sea Level) USA Only 5001 to 6000 (1524 to 1829) ALTITUDE RANGE FT. (M) USA Only 6001 to 7000 (1829 to 2134) ALTITUDE RANGE FT. (M) USA Only 7001 to 8000 (2134 to 2438) ALTITUDE RANGE FT. (M) USA Only 8001 to 9000 (2438 to 2743) USA Only 9001 to 10,000 2743 to 3048) AVG.
315A safeguard switch did not function properly and correct condition. f. Remove blockage from furnace vent elbow. g. Switch will auto--reset when it cools. h. Re--install vent connector. NOTE: Should switch remain open longer than 3 minutes, furnace control board will lockout the furnace for 3 hours. To reset furnace control board, turn thermostat below room temperature or from HEAT to OFF and turn 115--v power OFF, then back ON. 3.
! e. After component test is completed, one or more status codes (11, 25, or 41) will flash. See component test section of service label for explanation of status codes. NOTE: To repeat component test, turn setup switch SW1--6 OFF then back ON. f. Turn setup switch SW1--6 OFF. 7. RELEASE BLOWER ACCESS DOOR SWITCH, reattach wire to “R” terminal on furnace control board, replace blower access door, and replace outer access door.
Table 13 – Orifice Size and Manifold Pressure (In. wc) for Gas Input Rate (Tabulated Data Based on 21,000 Btuh High--Heat/14,500 Btuh for Low--Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) ALTITUDE RANGE FT. (M) 315A USA and Canada 0 to 2000 (0 to 610) ALTITUDE RANGE FT. (M) USA and Canada USA Altitudes 2001 to 3000 (610 to 914)or Canada Altitudes 2001 to 4500 (610 to 1372) ALTITUDE RANGE FT. (M) USA Only 3001 to 4000 (914 to 1219) ALTITUDE RANGE FT.
Table 13 -- Orifice Size and Manifold Pressure (In. wc) for Gas Input Rate (Con’t.) (Tabulated Data Based on 21,000 Btuh High--Heat/14,500 Btuh for Low--Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) USA Only 5001 to 6000 (1524 to 1829) ALTITUDE RANGE FT. (M) USA Only 6001 to 7000 (1829 to 2134) ALTITUDE RANGE FT. (M) USA Only 7001 to 8000 (2134 to 2438) ALTITUDE RANGE FT. (M) USA Only 8001 to 9000 (2438 to 2743) USA Only 9001 to 10,000 (2743 to 3048) AVG.
Table 14 – Filter Size Information -- In. (mm) FILTER SIZE FURNACE CASING WIDTH 14 ---1/2 (368) 17 ---1/2 (445) 21 (533) 24 (610) SIDE RETURN 16 X 25 X 3/4 (406 X 635 X 19) 16 X 25 X 3/4 (406 X 635 X 19) 16 X 25 X 3/4 (406 X 635 X 19) 16 X 25 X 3/4 (406 X 635 X 19) * Recommended 315A Cleaning and/or Replacing Air Filter The air filter arrangement will vary depending on the application. NOTE: If the filter has an airflow direction arrow, the arrow must point towards the blower.
! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, or death. Blower access door switch opens 115--v power to furnace control. No component operation can occur unless switch is closed. Exercise caution to avoid electrical shock from exposed electrical components when manually closing this switch for service purposes. b. Manually close blower access door switch.
315A a. Remove metal screw fitting from wire brush to allow insertion into cable. b. Insert the twisted wire end of brush into end of spring cable, and crimp tight with crimping tool or crimp by striking with ball--peen hammer. TIGHTNESS IS VERY IMPORTANT. NOTE: The materials needed in item 9 can usually be purchased at local hardware stores. (1.) Attach variable--speed, reversible drill to the end of spring cable (end opposite brush). (2.
COOLING TONNAGE VS. AIRFLOW (CFM) AIR CONDITIONING TONS (12,000 BTU/HR) AIRFLOW (CFM) 070 MODEL 090 MODEL 110, 135, & 155 MODELS 1-1/2 525 X2 X 2 700 X X2 2-1/2 875 X X X2 3 1050 X1 X X 3-1/2 1225 X 4 1400 5 1750 X1 6 2100 X X X1 X X X X-INDICATES AN ALLOWABLE SELECTION.
315A seconds after the GVR closes, a 2--second flame proving period begins. The HSI igniter will remain energized until the flame is sensed or until the 2--second flame proving period begins. If the furnace control CPU selects high--heat operation, the high--heat gas valve solenoid GV--HI is also energized. d.
315A vac is detected by the furnace control on the DHUM input, the furnace control operates in Thermidistat mode. If the DHUM input is low for more than 48 hours, the furnace control reverts back to non--Thermidistat mode. The cooling operation described in item 3. above also applies to operation with a Thermidistat. The exceptions are listed below: a.
315A blower airflow after the heating cycle is completed. In high--heat, the furnace control CPU will drop the blower motor BLWM to low--heat airflow during the selected blower--OFF delay period before transitioning to continuous--blower airflow. When the thermostat “calls for low--cooling”, the blower motor BLWM will switch to operate at low--cooling airflow.
A02108A 57 Go to section below for the status code that was flashed. Determine status code.
A02108B 58 24 SECONDARY VOLTAGE FUSE IS OPEN Check for: - Short circuit in secondary voltage (24V) wiring including thermostat leads. Disconnect thermostat leads to isolate short circuit. 23 PRESSURE SWITCH DID NOT OPEN Check for: - Obstructed pressure tube. - Pressure switch stuck closed. 22 ABNORMAL FLAME-PROVING SIGNAL Flame is proved while gas valve is deenergized. Inducer will run until fault is cleared. Check for: - Stuck open or leaky gas valve.
A02108C 59 31 HIGH-HEAT PRESSURE SWITCH OR RELAY DID NOT CLOSE OR REOPENED - Check for: - Control relay may be defective. - Gas valve is miswired. - See status code 32. 25 INVALID MODEL SELECTION OR SETUP ERROR – If status code 25 only flashes 4 times on power-up the control is missing its model plug PL4 and is defaulting to the model selection stored in memory.
315A E2008 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 11/08 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. 60 Catalog No.
