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Related Manuals for York Y92E Series
Summary of Contents for York Y92E Series
- Page 1 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces York International Corporation, 5005 6154201-UIM-B-1224 York Drive, Norman, OK 73069 Supersedes: 6154201-UIM-A-0824 2024-12-20 Johnson Controls Ducted Systems...
- Page 2 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 3: Table Of Contents
High-altitude pressure switch conversion....................32 Checking the furnace gas input rate and manifold gas pressure............33 Electrical power connections........................34 Connecting the supply voltage......................35 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 4 Control circuit fuse..........................72 Blower door safety switch........................72 Rollout switch controls........................72 Pressure switches..........................73 Limit controls............................73 Normal operation and diagnostics......................73 Heat staging time..........................74 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 5 Diagnostic fault code storage and retrieval..................78 Fault code retrieval..........................79 Replacement parts............................80 Replacement part contact information.....................81 Wiring diagrams............................. 82 Start-up sheet..............................83 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 6 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 7: General
Understand and pay particular attention to the signal words DANGER, WARNING, or CAUTION, as well as the NOTICE, Important, and Note alerts. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 8 All manuals and warranty information must be given to the user or left near the Indoor Unit. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 9: Safety Rules And Precautions
Only discharge combustion products outdoors. Only connect the furnace to an approved vent system, as specified in this manual. • Test for gas leaks as specified in this manual. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 10 Do not use the top return bend of the heat exchangers as lifting points as the tubes may shift out of position. Important: The doors must remain on the furnace when moving or lifting the furnace during installation. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 11: Safety Requirements
Paper bags, boxes or other paper products. Never operate the furnace with the blower door removed. To do so could result in serious personal injury and/or equipment damage. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 12: Codes And Standards
United States: Section 9.3 of the NFGC, air for Combustion and Ventilation • Canada: Part 8 of NSCNGPIC, Venting Systems and Air Supply for Appliances Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 13: For Furnaces Installed In The Commonwealth Of Massachusetts Only
(30) day period, a battery operated carbon monoxide detector with an alarm shall be installed. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 14 248 CMR 5.08(2)(a)1 through 4. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 15: Inspection
WARNING Liquid anti-freeze will cause damage to internal plastic parts of this furnace. Do not attempt to winterize the furnace using liquid anti-freeze. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 16: Clearances
The duct system must complete a path for heated or cooled air to circulate through the air conditioning and heating equipment, and to and from the conditioned space. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 17 This condition can result in premature heat exchanger failure, which can result in personal injury, property damage, or death. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 18: Using The Duct Flanges
1. Attach the supply plenum to the furnace outlet. Use an approved, flexible duct connector on all installations. 2. Ensure that you seal the connection to prevent air leakage. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 19: Floor Base And Ductwork Installation - Downflow
Follow the instructions supplied with the indoor coil cabinet for installing the cabinet to the duct connector. • Plug intake and vent pipe holes in the bottom panel and move the grommet to the required vent side exit. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 20: Coil Installation
Mount the indoor coil on the supply side of the furnace as shown in Figure 5 Figure 8. Refer to the installation instructions provided with each indoor coil. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 21 Figure 5: Vertical upflow applications with furnaces Figure 6: Vertical downflow applications with furnaces Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 22: Downflow Duct Connectors
Refer to the instructions supplied with the duct connector for correct installation. See the separate accessory parts list at the end of these instructions for the approved accessory duct connectors. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 23: Residential And Modular Home Upflow Return Plenum Connection
Important: It is possible to install this furnace in a horizontal position on either side as shown Figure 9. Do not install this furnace on its back. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 24: Attic Installation
See Figure 11 for details and additional information. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 25: Downflow Application
S1-37348991001 internal vent kit 21.0 in. • S1-37348992001 internal vent kit 24.5 in. Note: There is no kit available for A width cabinet models. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 26 Figure 12: Downflow venting Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 27: Dimensions
131 (59) 100 (29.3) 2000 (56.6) 53.3 19.8 50.5 18.2 46.2 138 (63) 120 (35.1) 2000 (56.6) 24.5 62.2 23.4 59.4 21.7 55.1 147 (67) Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 28: Filter Installation
Locate the L shaped corner locators. These indicate the size of the cutout to be made in the furnace side panel. Figure 14: Side return cutout markings Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 29 The use of straps or supports is required to support the weight of the external filter box. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 30: Gas Piping And Safety
Important: Plan the gas supply routing before determining the correct gas pipe entry. Use 90° conventional elbows and short pipe nipples to enter through the cabinet access holes. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 31: Gas Piping Installation
Placing a wrench to the body of the gas valve will damage the valve causing improper operation and/or the valve to leak. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 32: Gas Orifice Conversion For Propane
A high altitude pressure switch kit may be required. Use the correct kit for the furnace input rate and size. For more information, refer to the Technical Guide for the high altitude kit number or Table Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 33: Checking The Furnace Gas Input Rate And Manifold Gas Pressure
2. Adjust the gas input rate and manifold gas pressure if required by following the procedures in Adjusting the inlet and manifold gas pressure. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 34: Electrical Power Connections
Wire size and overcurrent protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes. • Install the furnace so that the electrical components are protected from water. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 35: Connecting The Supply Voltage
Reposition on the opposite side of the furnace and fasten using the holes provided. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 36: Low-Voltage Control Wiring Connections
Figure 18: Standard ECM furnace and single-stage HP Figure 19: Standard ECM furnace and multi-stage HP Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 37 Note: In applications using a heat pump, the room thermostat must manage fossil fuel operation. Figure 20: Standard ECM furnace and single-stage AC Figure 21: Standard ECM furnace and premium multi-stage AC Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 38: Accessory Connections
For all 40k, 60k, and 80k input furnaces, the main drain is plumbed through the casing right-side opening when viewed from the front of the furnace. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 39 A loop has been added to the pressure switch vacuum hose. However, ensure that all pressure switch hoses are routed so that they prevent any condensate from entering the pressure switch. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 40: Condensate Drain Termination
WARNING Liquid anti-freeze will cause damage to internal plastic parts of this furnace. Do not attempt to winterize the furnace using liquid anti-freeze. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 41 Figure 23: Upflow configuration Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 42 Figure 24: Downflow configuration Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 43 Figure 25: Horizontal left configuration Figure 26: Horizontal right configuration Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 44: Combustion Air And Vent System Safety
Spears Manufacturing LabWaste(R) series. Short radius (plumbing or pressure) elbows are not allowed for venting. The standard dimensions of the acceptable elbows are shown in Figure Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 45: Polypropylene Vent Or Intake Piping
For other PolyPro pipe and fitting part numbers, go to http://www.duravent.com. Centrotherm InnoFlue • Adapter to air intake coupling - ISAGL0202 • Adapter to draft inducer blower - ISAAL0202 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 46 7801 ft to 10100 ft (kBtu/hr) 40A10 60B12 80B12 80C16 100C16 — — 100C20 — — 120D20 — — — — Figure 27: Elbow dimensions Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 47: Example: How To Calculate The Equivalent Length Of Pipe
This is less than the 65 ft maximum equivalent length of 2 in. pipe allowed for that model and is therefore acceptable. Alternatively, using 3 in. pipe and standard elbows, the total equivalent length is: Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 48: Combustion Air And Venting
Important: The vent must be installed with the minimum required clearances, and must comply with local codes and requirements. Vent clearances Figure 28: Home layout Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 49 For clearance above paved sidewalk or paved driveway located on public property, a vent must not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 50: Vent System
Locate the termination where it is not affected by wind gusts, light snow, airborne leaves, or susceptible to recirculation of flue gases. • Locate the termination where it cannot be damaged or exposed to flying stones, balls, and similar. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 51 Proper venting installation (of both intake and exhaust) and sealing any equipment air leaks that might contact the intake pipe will help reduce condensation. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 52: Venting Multiple Units
The combustion air side of the single-pipe configuration shown in Figure 29 Figure 37 referred to in these instructions as ambient combustion air supply. Follow the instructions for Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 53: Downward Venting
• The condensate drain lines must not pass through unconditioned spaces where the temperature can fall below freezing. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 54: Combustion Air Supply
See Figure 38 for attic and crawl space termination. Only the combustion air intake may terminate in the attic. The vent must terminate outside. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 55: Outdoor Combustion Air
Attach the supplied intake coupling and 18 in. (46 cm) of pipe to the furnace to prevent accidental blockage of the combustion air intake. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 56 Rooms communicating directly with the space containing the appliances are considered part of the unconfined space, if doors have openings or louvers. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 57 The following must be considered to obtain adequate air for combustion and ventilation in confined spaces. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 58: Dampers, Louvers And Grilles
4 (10) 60,000 30 (193) 15 (97) 5 (13) 80,000 40 (258) 20 (129) 5 (13) 100,000 50 (322 ) 25 (161) 6 (15) Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 59: Air Supply Openings And Ducts (Canada Only)
The blocking effects of louvers, grilles, and screens must be given consideration in calculating the free area. If the free area of a specific louver or grille is not known, see Table Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 60: Ventilated Combustion Air
A crawl space combustion air installation consists of a straight pipe from the PVC coupling on the burner box that extends into the crawl space and terminates with a 1/4 in. (6.4 mm) mesh screen and no elbows. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 61 Installation Code (latest editions). If the vent system must be resized, follow the appropriate tables in Appendix G of the above codes or for this appliance. Figure 38: Attic and crawl space combustion air termination Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 62: Specially Engineered Installations
The furnace must be isolated from the gas supply piping system by closing the equipment shut-off valve during any pressure testing of the gas supply system. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 63: Running The Ignition System Sequence
Do not bottom out gas valve regulator adjusting screw. This can result in unregulated manifold pressure and result in excess overfire and heat exchanger failures. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 64 Size of test dial revolution revolution 1 ft 2 ft 5 ft 1 ft 2 ft 5 ft 1800 1636 1500 1385 1286 1200 1125 1059 1000 Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 65: Adjusting The Inlet And Manifold Gas Pressure
OFF and turn the electrical supply switch to OFF. Remove the flexible tubing from the gas valve pressure tap and tighten the pressure tap plug using the 3/32 in. (2.4 mm) hex head wrench. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 66 (out), using a slotted screwdriver, to decrease the input rate. Adjust the screw clockwise (in) to increase the input rate. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 67 Failure to follow this warning could result in personal injury, death, and/or property damage. Reinstall the manifold pressure tap plug-in gas valve to prevent gas leak. Figure 39: Reading gas pressure - Manifold pressure U tube connection Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 68: Airflow Settings
In certain circumstances, it may be necessary to move the continuous fan speed to a different speed tap. However, doing so results in higher than normal electrical energy usage and electric utility bills. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 69 Place the unused motor lead on the park terminal. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 70 Figure 40: Furnace control board NOTICE The control board Communicating Control connection is not currently supported. Do not connect anything to this connector. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
- Page 71 Airflow expressed in standard cubic feet per minute (SCFM) • Motor voltage at 115 V • Do not use shaded values as heating speeds. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 72: Safety Controls
Corrective action is required. These are manual reset controls that must be reset before operation can continue. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 73: Pressure Switches
Table 18: DIP switch settings for continuous fan speed DIP switch setting Continuous fan speed Low COOL Hi COOL Low Heat Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 74: Intermittent Blower - Cooling
If the problem has not been corrected the furnace again lockouts after three retries. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 75 10 or on. Figure 41 shows all switches in the 1 or ON positions. Figure 41: Blower delay DIP switches - factory setting Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems...
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Page 76: Troubleshooting
Do not try to repair controls. Replace defective controls with UPG Source 1 Parts. Never adjust pressure switch to allow furnace operation. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 77: Furnace Control Diagnostics
The control enters a hard lockout. Cycle the power off and on to reset the control after the problem has been corrected. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 78: Diagnostic Fault Code Storage And Retrieval
If more than five error codes have occurred, only the five most recent are retained. The furnace control board has a LAST ERROR button, which is used to retrieve error codes. This function only Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 79: Fault Code Retrieval
If there are no fault codes in memory, the LED flashes green twice. To clear the fault code memory, press and hold the SW button until the LED flashes rapid green. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 80: Replacement Parts
Hose, condensate Hose, rain gutter Knob, quarter turn (four required) Motor mount kit Orifice, burner (natural no. 45) Pan, condensate Plug, seal, 7/8 in. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 81: Replacement Part Contact Information
Johnson Controls Ducted Systems Consumer Relations 5005 York Drive Norman, OK 73069 Third-Party Trademarks Notice: For information about third-party trademarks, refer to the relevant company websites. Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 82: Wiring Diagrams
Wiring diagrams Figure 42: Wiring diagram Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... -
Page 83: Start-Up Sheet
Start-up sheet Installation Manual: Y92E Series - Condensing Two-Stage Standard ECM Multi-position Gas Furnaces Johnson Controls Ducted Systems... - Page 84 Subject to change without notice. Published in U.S.A. Copyright © 2024 by Johnson Controls. All rights reserved. Johnson Controls Ducted Systems...
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