Table of Contents
Advertisement
935SA
Up to 95% AFUE, Single-Stage, Upflow/Horizontal
Ultra Low NOx, 35-in. Tall, Condensing Gas Furnace
(Minor Series B)
Installation, Start-up, Operating and Service Maintenance
NOTE: Read the entire instruction manual before starting the
installation
Approved for installations up to 5,400 feet (1646 meters)
TABLE OF CONTENTS
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 1 - Minimum Clearances to Combustible Materials for All Units
4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 - Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 8
Table 3 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . 10
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CONDENSATE DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . 11
Table 5 - Condensate Trap Configurations . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6 - Evaporator Coil Spacer or Shield Requirements. . . . . 16
Table 7 - Air Filter Selection and Duct Sizing - In. (mm) . . . . . 21
Table 8 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 21
Table 9 - Filter Media Pressure Drop (Clean) Versus Airflow - In.
W.C. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 10 - Filter Media Pressure Drop (Clean) Versus Face Velocity-
In. W.C. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 11 - Air Delivery - CFM (With Filter) . . . . . . . . . . . . . . . 22
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 12 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 24
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 13 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 14 - Vent Termination Kit for Direct Vent (2-pipe) Systems29
Table 15 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 16 - Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 17 - Maximum Allowable Exposed Vent Length in Uncondi-
tioned Space - Ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 18 - Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 38
Table 19 - Deductions from Maximum Equivalent Vent Length - Ft.
Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1E, with permission of National Fire Protection Association, Quincy, MA
02269 and American Gas Association, Washington DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI
on the referenced subject, which is represented only by the standard in its entirety.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . 44
Table 20 - Altitude Derate Multiplier for USA. . . . . . . . . . . . . . 45
Table 21 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 22 - Gas Valve Outlet Pressure for Gas Heat Values at Altitude
- 40,000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 23 - Gas Valve Outlet Pressure for Gas Heat Values at Altitude
- 60,000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 24 - Gas Valve Outlet Pressure for Gas Heat Values at Altitude
- 80,000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 25 - Gas Valve Outlet Pressure for Gas Heat Values at Altitude
- 100,000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 50
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 59
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Carbon Monoxide (CO) is a colorless, odorless, and tasteless poisonous
gas that can be fatal when inhaled. Follow all installation, maintenance,
and service instructions. See additional information below regarding
the installation of a CO Alarm.
Most states in the USA and jurisdictions in Canada have laws that
require the use of Carbon Monoxide (CO) alarms with fuel burning
products. Examples of fuel burning products are furnaces, boilers, space
heaters, generators, water heaters, stoves/ranges, clothes dryers,
fireplaces, incinerators, automobiles, and other internal combustion
engines. Even if there are no laws in your jurisdiction requiring a CO
Alarm, it's highly recommended that whenever any fuel burning product
is used in or around the home or business that the dwelling be equipped
with a CO Alarm(s). The Consumer Product Safety Commission
recommends the use of CO Alarm(s). The CO Alarm(s) must be
installed, operated, and maintained according to the CO Alarm
manufacturer's instructions. For more information about Carbon
Monoxide, local laws, or to purchase a CO Alarm online, please visit the
following website. https://www.kidde.com.
A200352
Advertisement
Table of Contents
Related Manuals for Bryant 935SA
Summary of Contents for Bryant 935SA
-
Page 1: Table Of Contents
935SA Up to 95% AFUE, Single-Stage, Upflow/Horizontal Ultra Low NOx, 35-in. Tall, Condensing Gas Furnace (Minor Series B) Installation, Start-up, Operating and Service Maintenance Instructions NOTE: Read the entire instruction manual before starting the (M) ..........38 installation START-UP, ADJUSTMENT, AND SAFETY CHECK . -
Page 2: Required Notice For Massachusetts Installations
935SA: Installation, Start-up, Operating and Service Maintenance Instructions REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA-54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: a. -
Page 3: Safety Considerations
935SA: Installation, Start-up, Operating and Service Maintenance Instructions NOTE: ALL DIMENSIONS IN INCH (MM) U.S. ECCN: Not Subject to Regulation (N.S.R.) SD5660-4 REV. - A210210 SHIP WT. FURNACE SIZE LB (KG) CABINET WIDTH OUTLET WIDTH BOTTOM INLET WIDTH AIR INTAKE... - Page 4 935SA: Installation, Start-up, Operating and Service Maintenance Instructions NOTICE are used to highlight suggestions which will result in enhanced CAUTION installation, reliability, or operation. 1. Use only with type of gas approved for this furnace. Refer to the FURNACE RELIABILITY HAZARD furnace rating plate.
-
Page 5: Introduction
935SA: Installation, Start-up, Operating and Service Maintenance Instructions This furnace is designed for minimum continuous return-air temperature NOTICE of 60°F (15°C) db or intermittent operation down to 55°F (13°C) db such as when used with a night setback thermostat. Return-air temperature IMPORTANT INSTALLATION AND START-UP must not exceed 80°F (27°C) db. -
Page 6: Codes And Standards
935SA: Installation, Start-up, Operating and Service Maintenance Instructions Safety • Current edition of US: National Fuel Gas Code (NFGC) NFPA 54/ANSI Z223.1 and the Installation Standards, Warm Air Heating and Air Conditioning Systems ANSI/NFPA 90B General Installation • US: NFGC and the NFPA 90B. For copies, contact the National Fire Protection Association Inc., Batterymarch Park, Quincy, MA 02269;... -
Page 7: Accessories
935SA: Installation, Start-up, Operating and Service Maintenance Instructions General body with static electricity (for example; DO NOT move or shuffle your feet, do not touch ungrounded objects, etc.). These furnaces are shipped with materials to assist in proper furnace 4. If you touch ungrounded objects (and recharge your body with installation. -
Page 8: Air For Combustion And Ventilation
935SA: Installation, Start-up, Operating and Service Maintenance Instructions WARNING CAUTION FIRE, INJURY OR DEATH HAZARD FURNACE CORROSION HAZARD Failure to follow this warning could result in personal injury, death Failure to follow this caution may result in furnace damage. and/or property damage. - Page 9 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Indoor Combustion Air© NFPA & AGA The following requirements apply to the Standard Method and to the Known Air Infiltration Rate Method. Standard and Known-Air-Infiltration Rate Methods 1. Adjoining rooms can be considered part of a space if: Indoor air is permitted for combustion, ventilation, and dilution, if the a.
-
Page 10: Condensate Trap
935SA: Installation, Start-up, Operating and Service Maintenance Instructions EXAMPLES: Determining Free Area FURNACE WATER HEATER TOTAL INPUT 60,000 40,000 (100,000 divided by 3,000) 33.3 Sq. In. for each Single Duct or Opening 80,000 30,000 (110,000 divided by 2,000) 55.0 Sq. In. for each two Horizontal Ducts... -
Page 11: Condensate Drain Connection
935SA: Installation, Start-up, Operating and Service Maintenance Instructions appropriate plastic ties. Follow the heat tape manufacturer’s WARNING recommendations. Prime the trap before furnace operation. The condensate drain line must be supported and/or secured per local CARBON MONOXIDE POISONING AND PROPERTY codes. - Page 12 935SA: Installation, Start-up, Operating and Service Maintenance Instructions A200071 Fig. 10 – Example of Field Drain Attachment (Not Allowed) A200074 NOTE: Coil may require metal spacer or shield between furnace and coil. See coil install requirements (Table Fig. 11 – Example of Field Drain Attachment Table 5 –...
-
Page 13: Installation
935SA: Installation, Start-up, Operating and Service Maintenance Instructions NOTICE Upflow installations utilizing the right side air return opening should follow the Upflow Specific Steps - Offset Installation to ensure the full opening is available for return ductwork. INSTALLATION Preparing the Furnace – Before Setting in Place 1. - Page 14 935SA: Installation, Start-up, Operating and Service Maintenance Instructions (see Fig. 19). If the tube is too long, cut any extra length from the tube. Upflow Specific Steps – Offset Installation 1. Trap Offset Adapter Accessory Kit (purchased separately) is required. Instead of installing the trap to the adapter plate, screw the trap offset adapter to the adapter plate (see Fig.
- Page 15 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Alternate Horizontal Option - Remote Trap Installation Specific Steps 1. The trap can be installed using a second adapter plate purchased separately. Install trap adapter to the collector box using provided machine screw (see Fig.
- Page 16 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 7. Connect additional condensate piping to a code-approved drain, or properly shielded. Coils that are only partially shielded should be to a condensate pump approved for use with acidic furnace treated as un-shielded and require a spacer.
- Page 17 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Connect supply-air duct to flanges on furnace supply-air outlet. Bend flange upward to 90° with wide duct pliers (see Fig. 27). The supply-air duct must be connected to ONLY the furnace supply-outlet-air duct flanges or air conditioning coil casing (when used).
- Page 18 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 5/ 16 (8mm) (8mm) 5/ 16 (44mm) (44mm) (8mm) (8mm) 5/ 16 (44mm) 3/ 4 3/ 4 (44mm) A89014 Fig. 30 – Leveling Legs NOTE: Bottom closure must be used when leveling legs are used. It A200426 Fig.
- Page 19 935SA: Installation, Start-up, Operating and Service Maintenance Instructions CAUTION MINOR PROPERTY HAZARD Failure to follow this caution may result in minor property damage. Local codes may require a drain pan under entire furnace and condensate trap when a condensing furnace is used in an attic application or over a finished ceiling.
- Page 20 935SA: Installation, Start-up, Operating and Service Maintenance Instructions the heat exchanger can be viewed for possible openings using light There are no provisions for an internal filter in these furnaces. An assistance or a probe can be inserted for sampling the air stream. The external filter rack is required and is purchased separately.
-
Page 21: Pa)
935SA: Installation, Start-up, Operating and Service Maintenance Instructions Table 7 – Air Filter Selection and Duct Sizing - In. (mm) FILTER SIZE FURNACE CASING WIDTH FILTER TYPE SIDE RETURN BOTTOM RETURN † 16 x 25 x 3/4 (406 x 635 x 19) -
Page 22: Air Ducts
935SA: Installation, Start-up, Operating and Service Maintenance Instructions AIR DUCTS Secure ductwork with proper fasteners for type of ductwork used. Seal supply- and return-duct connections to furnace with code approved tape NOTICE or duct sealer. NOTICE Many states, provinces and localities are considering or have implemented standards and/or restrictions on duct sizing practices, Cabinet air leakage is less than 2% at 1.0 in. -
Page 23: Gas Piping
935SA: Installation, Start-up, Operating and Service Maintenance Instructions Ductwork Acoustical Treatment NOTICE NOTE: Metal duct systems that do not have a 90 degree elbow and 10 ft. (3 M) of main duct to the first branch take-off may require internal In the state of Massachusetts: acoustical lining. -
Page 24: Electrical Connections
935SA: Installation, Start-up, Operating and Service Maintenance Instructions pipe pressure test. After all connections have been made, purge lines and check for leakage at furnace prior to operating furnace. SUPPLY The gas supply pressure shall be within the maximum and minimum... - Page 25 935SA: Installation, Start-up, Operating and Service Maintenance Instructions The J-Box mounting bracket and green ground screw is used as a CAUTION grounding point for all line voltage wiring options. The J-Box cover may be omitted when electrical connections are made inside an external FURNACE MAY NOT OPERATE HAZARD electrical box mounted external to the casing.
- Page 26 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 5. Fasten the external electrical box to the furnace casing using two 2. Route listed power cord through 7/8-in. (22 mm) diameter hole in (2) sheet metal screws. casing and J-Box bracket.
- Page 27 935SA: Installation, Start-up, Operating and Service Maintenance Instructions The HUM 24 VAC terminal is energized when the blower starts could cause this fuse to blow. If fuse replacement is required, use ONLY during a call for heat. (See Fig. a 3-amp. fuse of identical size (see Fig.
-
Page 28: Venting
935SA: Installation, Start-up, Operating and Service Maintenance Instructions Table 13 – Electrical Data OPERATING VOLTAGE MAXIMUM VOLTS- MAXIMUM MINIMUM MAXIMUM FUSE RANGE UNIT WIRE FURNACE SIZE HERTZ- UNIT WIRE SIZE OR CKT BKR † AMPACITY LENGTH PHASE AMPS AMPS Maximum Minimum ‡... - Page 29 935SA: Installation, Start-up, Operating and Service Maintenance Instructions wall straight and flex, and required fittings (elbows, reducers, increasers, NOTICE connectors, adapters) only. NOTE: When using polypropylene venting systems, all venting RECOMMENDED SUPPORT FOR VENT materials used, including the vent terminations must be from the same TERMINATION manufacturer.
- Page 30 935SA: Installation, Start-up, Operating and Service Maintenance Instructions and for Ventilated Combustion Air/Non-Direct/1-Pipe system (see WARNING Fig. 57). Contact Local code authorities for other requirements to and/or exemptions from the National codes shown in the figures. CARBON MONOXIDE POISONING HAZARD...
- Page 31 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Any change in diameter to the pipe must be made as close to the furnace EXAMPLE FOR as reasonably possible (see Fig. 45). UPFLOW INSTALLATIONS. MAY BE APPLIED TO The Maximum Vent Length for the vent and combustion air pipe (when OTHER CONFIGURATIONS.
- Page 32 935SA: Installation, Start-up, Operating and Service Maintenance Instructions MAY NOT be used for venting the furnace. Try the next larger NOTICE diameter pipe NOTE: If the calculated Total Equivalent Vent Lengths results in ADDITIONAL INFORMATION FOR POLYPROPYLENE different diameter pipes for the vent and combustion air, select the larger VENTING SYSTEMS diameter for both pipes.
- Page 33 935SA: Installation, Start-up, Operating and Service Maintenance Instructions can pass through the vent pipe adapter; it cannot pass through the inlet pipe adapter. 2. Align the screw holes in the plastic vent pipe adapter with the Slope vent pipe back to the dimples in the casing.
-
Page 34: Instructions
935SA: Installation, Start-up, Operating and Service Maintenance Instructions 7. Insert the vent pipe into the vent elbow. WARNING 8. Torque clamp on vent elbow 15 lb-in. 9. Torque clamp on vent coupling 15 lb-in. CARBON MONOXIDE POISONING HAZARD 10. Insert the combustion air pipe into the adapter. - Page 35 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Installing the Vent Termination 2. Loosely assemble concentric vent/combustion air termination components together using instructions in kit. Roof Terminations 3. Slide assembled kit with rain shield REMOVED through hole. A roof termination of any type will require a 4-in. (102 mm) flashing for NOTE: Do not allow insulation or other materials to accumulate inside a 2 in.
- Page 36 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Alternate combustion air connection. Rotate vent elbow to required position. Any other unused knockout may be used for combustion air connection. Rotate vent elbow to required position. Vent Pipe A11308A Representative drawing only, some models may vary.
- Page 37 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Notes for venting options ALTERNATE 1. Attach vent pipe adapter with gasket to furnace casing. COMBUSTION AIR CONNECTIONS 2. Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling.
- Page 38 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Table 17 – Maximum Allowable Exposed Vent Length in Unconditioned Space - Ft. Unit Size 40,000 BTUH 60,000 BTUH 3/8-in. 1/2-in. Uninsulated Uninsulated 3/8-in. Insulation 1/2-in. Insulation Pipe Dia. Insulation Insulation Winter 1 ½...
- Page 39 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Venting System Length Calculations The Total Equivalent Vent Length (TEVL) for EACH combustion air or vent pipe equals the length of the venting system, plus the equivalent length of elbows used in the venting system (Table 19).
- Page 40 935SA: Installation, Start-up, Operating and Service Maintenance Instructions No operable windows, doors or Clearance distances for intakes of any type within the items greater than 3 feet shaded areas of Wall A and B. (1 meter ) away from the...
- Page 41 935SA: Installation, Start-up, Operating and Service Maintenance Instructions A12326 Fig. 54 – Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations.
- Page 42 935SA: Installation, Start-up, Operating and Service Maintenance Instructions A12325 Fig. 55 – Ventilated Combustion Air and Non-Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations.
- Page 43 935SA: Installation, Start-up, Operating and Service Maintenance Instructions ¾ in. (222mm) for 3 in. (76mm) ¾ in. (172mm) for 2 in. (51mm) 12 in. (305mm) min. separation between bottom of combustion air and bottom of vent (Typ.) A13305 Fig. 56 – Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System...
-
Page 44: Start-Up, Adjustment, And Safety Check
935SA: Installation, Start-up, Operating and Service Maintenance Instructions 5. Install blower compartment door. Door must be in place to operate Ventilated Combustion furnace. Air intake pipe Start-Up Procedures WARNING Pipe hangar 3” (76 mm) FIRE AND EXPLOSION HAZARD Failure to follow this warning could cause personal injury, death and/or property damage. - Page 45 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Adjustments g. Jumper R and W thermostat connections at the furnace control board. WARNING h. When main burners ignite, confirm inlet gas pressure is between 4.5 in. w.c. (1125 Pa) and 13.6 in. w.c. (3388 Pa).
- Page 46 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 5. Verify natural gas input rate by clocking meter. c. Adjust air temperature rise by adjusting blower speed. Increase blower speed to reduce temperature rise. Decrease blower speed NOTE: Gas valve regulator adjustment cap must be in place for proper to increase temperature rise input to be clocked.
- Page 47 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 5. Verify that the Status LED glows. If not, check that the power THERMOSTAT SUBBASE supply is energized and that the blower door is secure. Interpret TERMINALS WITH THERMOSTAT REMOVED diagnostic codes (see Fig.
- Page 48 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Table 22 – Gas Valve Outlet Pressure for Gas Heat Values at Table 23 – Gas Valve Outlet Pressure for Gas Heat Values at Altitude - 40,000 Altitude - 60,000 (Tabulated Data Based on 40,000 BTUH Input for 0-ft (0m) to 5400-ft...
- Page 49 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Table 24 – Gas Valve Outlet Pressure for Gas Heat Values at Altitude Table 25 – Gas Valve Outlet Pressure for Gas Heat Values at - 80,000 Altitude - 100,000 (Tabulated Data Based on 80,000 BTUH Input for 0-ft (0m) to 5400-ft...
-
Page 50: Service And Maintenance Procedures
935SA: Installation, Start-up, Operating and Service Maintenance Instructions SERVICE AND MAINTENANCE PROCEDURES Electrical Controls and Wiring Untrained personnel can perform basic maintenance functions such as WARNING cleaning and replacing air filters. All other operations must be performed by trained service personnel. A qualified service person should inspect ELECTRICAL OPERATION HAZARD the furnace once a year. - Page 51 935SA: Installation, Start-up, Operating and Service Maintenance Instructions Care and Maintenance SERVICE LED CODES - STATUS WARNING SECTION 1 If status code recall is needed, briefly (2-3 seconds) remove then reconnect one main limit wire to display CONTINUOUS OFF - Check for 115VAC at L1 and L2, stored status code.
- Page 52 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 5. Inspect any accessories attached to the furnace such as a humidifier 4. Remove two screws holding blower assembly to blower deck and or electronic air cleaner. Perform any service or maintenance to the slide blower assembly out of furnace.
- Page 53 935SA: Installation, Start-up, Operating and Service Maintenance Instructions GROMMET WARNING MOTOR SHAFT FLAT MOTOR ARM SCREW ELECTRICAL SHOCK HAZARD SET SCREW Failure to follow this warning could result in personal injury, or death. MOTOR WHEEL HUB Blower access door switch opens 115-v power to furnace control. No component operation can occur unless switch is closed.
- Page 54 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 1. Turn off gas and electrical supplies to furnace. 2. Remove control door. 3. Disconnect igniter wire connection. 4. Check igniter resistance. Igniter resistance is affected by temperature. Only check resistance when the igniter is at room temperature.
- Page 55 935SA: Installation, Start-up, Operating and Service Maintenance Instructions 12. Clean the relief port on collector box and the trap with a small wire. WARNING Shake any water out of the tube. 13. Reconnect relief tube to trap and collector box ports.
-
Page 56: Winterization
935SA: Installation, Start-up, Operating and Service Maintenance Instructions 11. Check furnace operation through two complete heat operating 9. Remove the middle unused rubber plug from the port on the cycles. collector box opposite the condensate trap. 12. Check for gas leaks. - Page 57 935SA: Installation, Start-up, Operating and Service Maintenance Instructions de-energizing the gas valve solenoid GV. The control CPU will BLWM will remain on HEAT tap for the selected blower-OFF repeat the ignition sequence for up to three more delay period. At the end of the blower-OFF delay, the blower motor Trials-For-Ignition before going to an Ignition-Lockout.
- Page 58 935SA: Installation, Start-up, Operating and Service Maintenance Instructions CONNECTION DIAGRAM SCHEMATIC DIAGRAM TO 115VAC FIELD DISCONNECT NOTE #2 EQUIPMENT GROUND NOTE #3 PL17 PL19 PL12 HSIR PL13 PL14 15VDC SUPPLY PL11 PWM SIGNAL NEUTRAL 115 VAC NOTE #5 PCB GROUND...
-
Page 59: Parts Replacement Information Guide
935SA: Installation, Start-up, Operating and Service Maintenance Instructions PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Blower door Burner Bottom plate Flame sensor Control door Gas valve Door knob assembly Hot surface igniter Top filler plate Manifold Electrical Group... - Page 60 935SA: Installation, Start-up, Operating and Service Maintenance Instructions © 2022 Carrier. All rights reserved. Edition Date: 03/22 Catalog No: II935SA-05 REV B A Carrier Company Replaces: II935SA-05 REV A Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Need help?
Do you have a question about the 935SA and is the answer not in the manual?
Questions and answers