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Summary of Contents for York Y91E Series
- Page 1 Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi- Position Gas Furnace York International Corporation, 5005 6125049-UIM-C-0624 York Drive, Norman, OK 73069 Supersedes: 6125049-UIM-B-0623 2024-06-18 Johnson Controls Ducted Systems...
- Page 2 Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
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Page 3: Table Of Contents
Electronic air cleaner connection........23 Fault code retrieval............50 Humidifier connection.............23 Replacement parts..............51 Furnace control twinning wiring..........23 Replacement part contact information......51 Twinning duct system............24 Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... - Page 4 Wiring diagrams..............52 Start-up sheet.................53 Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
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Page 5: General
Note indicates something of special interest or importance. Notes can contain any type of information except safety information. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 6: Safety Rules And Precautions
The furnace operating conditions are verified, • Provide adequate combustion and ventilation air to including ignition, input rate, temperature rise, the furnace space as specified in this manual. and venting. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 7: Safety Requirements
• Antistatic fabric softeners for clothes dryers Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 8: Codes And Standards
American Society of Heating, Refrigeration, and Air detector with alarm and battery back-up may be Conditioning Engineers (ASHRAE) 2021 Fundamentals installed on the next adjacent floor level. Handbook Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 9: Inspection
• Make sure that the furnace does not interfere with adequate air circulation in the confined space. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 10: Ductwork
The safety codes. minimum rectangular duct height is 4 in. (10.2 cm) attached to the plenum. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 11: Using The Duct Flanges
Note: The screws are not provided. Use crosshatched sheet metal to eliminate any popping of the sheet metal when the indoor fan is energized. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 12: Floor Base And Ductwork Installation - Downflow
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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 13: 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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 14: Residential And Modular Home Upflow Return Plenum Connection
Place one support located approximately in the center of the furnace near the blower shelf. Place the third support at the return end of the furnace. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 15: 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. Figure 12: Downflow venting Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 16: 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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 17: Filter Installation
If filters are provided at another location in the return air system, the ductwork can be directly attached to the furnace side panel. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 18: Gas Piping Installation
Gas piping may be connected from either side of the furnace using any of the gas pipe entry plugs on both sides of the furnace. See Downflow application Figure Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 19: Gas Orifice Conversion For Propane
12. Measure the time in seconds for the gas meter to complete one revolution and note the reading. 13. See Table 14 for manifold pressure. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 20: High-Altitude Pressure Switch Conversion
High-altitude pressure switch accessory kit part number 26A08 S1-1PS3313 40A10 S1-1PS3315 60A10 S1-1PS3313 60B12 S1-1PS3313 80B12 S1-1PS3316 80C16 S1-1PS3314 80C20 S1-1PS3314 100C16 S1-1PS3317 100C20 S1-1PS3318 120D20 S1-1PS3314 Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 21: Electric Power
Wire size and over current 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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 22: Connecting The Supply Voltage
See Figure Ensure correct polarity of the power supply and a correct ground connection for the furnace's control system. See Figure Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 23: Accessory Connections
Two 1/4 in. (6.4 mm) spade terminals for humidifier connections, HUM and HUM N, are located on the control board. The terminals provide 115 VAC (1 A maximum) during heating system operation. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 24: Twinning Duct System
If a mixing device is not used, any ducts that are connected downstream from the furnace that is not operating in heat mode supply cold air to the occupied spaces. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 25: Condensate Piping And Furnace Venting Configuration
CAUTION The furnace condensate pan is self-priming and contains an internal trap to prevent flue gas leaking. Do not install an external condensate trap. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... - Page 26 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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
- Page 27 Figure 27: Upflow configuration Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
- Page 28 Figure 28: Downflow configuration Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
- Page 29 Figure 29: Horizontal left configuration Figure 30: Horizontal right configuration Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
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Page 30: Combustion Air And Vent System
7, which lists the maximum equivalent length of pipe allowed for each model of furnace. The equivalent length of pipe for each elbow installed is listed Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 31: Polypropylene Vent Or Intake Piping
5,401 ft to 7,800 ft 7,801 ft to 10,100 ft 26A08 40A10 60A10 60B12 80B12 80C16 80C20 100C16 — — 100C20 — — 120D20 — — — — Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 32: Combustion Air And Venting
Total = 57 equivalent ft of 2 in. pipe This is less than the 65 ft maximum equivalent length of 2 in. pipe allowed for that model and is therefore acceptable. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 33: Vent Clearances
I. Clearance to service regulator vent 3 ft (91.4 cm) 3 ft (91.4 cm) or in accordance with outlet local installation codes and the requirements of the gas supplier Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 34: Vent System
Any fresh air or make up inlet for dryer or furnace installed completely vertical or a combination of area is considered to be a forced air inlet. horizontal, vertical, or offset using elbows. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 35: Vent Applications And Termination
37. The two-pipe system must have a separate combustion air pipe and a separate vent pipe for each furnace. Under no circumstances can the two combustion Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 36: Downward Venting
• The condensate drain line must be primed at the initial start-up before the start of heating season. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 37: Outdoor Combustion Air
Attach the supplied intake coupling and 18 in. (46 cm) of connection pipe to the furnace to prevent accidental blockage of the combustion air intake. Figure 40: Ambient combustion air Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 38: Dampers, Louvers And Grilles (Canada Only)
If the free area of a specific louver or grille is not known, see Table to estimate free area. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 39: Air Supply Openings And Ducts
12 in. (30.5 cm) above the outside grade that extends into the crawl space and terminates with a level. 1/4 in. (6.4 mm) mesh screen and no elbows. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 40: Specially Engineered Installations
Important: You must check all electrical connections made in the field and in the factory for adequate tightness. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 41: Gas Piping Leak Check
Adjusting the manifold gas pressure and input rate to adjust the manifold pressure. Repeat Step 2 to Step 5 until the correct input is achieved. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... - Page 42 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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
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Page 43: Adjusting The Manifold Gas Pressure And Input Rate
This is to obtain the Btu input specified on the rating plate and/or the nominal manifold pressure specified in these instructions and on the rating plate. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 44: 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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... - Page 45 The fan-off timing can be adjusted by positioning the blower delay DIP switches. See Adjustment of blower control settings. Figure 45: Furnace control board Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
- Page 46 The airflow is expressed in standard cubic feet per minute (SCFM). • The motor voltage is at 115 V. • Do not use shaded values as heating speeds. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems...
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Page 47: Safety Controls
Electrical supply to this unit is dependent upon the panel blower motor speed tap wire. that covers the blower compartment being in place and correctly positioned. Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 48: Intermittent Blower - Cooling
The factory setting is 10 or on, off as shown in Figure Figure 46: Blower delay DIP switches - factory setting Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 49: Troubleshooting
An open fuse results five times (four recycles) during the heating cycle. Check in a steady on red LED. Turn power to the furnace off and Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 50: Diagnostic Fault Code Storage And Retrieval
Normal flame sense current is approximately 3.7 μA DC Low flame signal warning starts at 1.5 μA DC Low flame signal control lockout point is 0.1 μA DC Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 51: Replacement Parts
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: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 52: Wiring Diagrams
Wiring diagrams Figure 47: Wiring diagram Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... -
Page 53: Start-Up Sheet
Start-up sheet Installation Manual: Y91E Series - Condensing Single-Stage ECM Multi-Position Gas Furnace Johnson Controls Ducted Systems... - Page 54 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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