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Units must be installed per national and local safety codes, including electrical and fuel gas codes.
Guidelines for selecting a suitable location for outdoor installation, considering air supply and side placement.
Instructions for safely moving and lifting the unit, emphasizing proper sling use and fork-lift operation.
Details required clearances for unit operation and servicing, referencing specific tables for details.
Adaptation for downflow use and requirements for ductwork design and sizing according to ACCA standards.
Requirements for unit positioning on a roof curb to ensure proper fit and alignment.
Information on filter requirements, including single-phase units needing installer-provided filters.
Recommendation for condensate trap installation and proper plumbing to local codes.
Locations for accessing serviceable components like blower, gas control, and refrigerant connections.
Field wiring must conform to NEC/CEC codes; unit must be grounded; fused disconnect switch required.
Details on scroll compressors designed for R-410A, POE oil properties, and handling precautions.
Explanation of three-phase scroll compressor rotation and how to correct misphasing for proper operation.
Proper gas piping sizing depends on flow rate, gas gravity, and run length; follow codes and tables.
Routing the gas supply line through designated holes and typical piping arrangements.
Instructions for installing the flue vent hood to ensure proper unit operation and safety warnings.
Step-by-step process of the unit's heating cycle, including thermostat activation and safety controls.
Description of safety controls like Limit Switch, Pressure Switch, Flame Sensor, Rollout Switch, and Auxiliary Limit Switch.
Step-by-step process of the unit's cooling cycle, including thermostat activation and fan operation.
Description of safety controls for cooling, including High Pressure (HP) and Low Pressure (LP) switches.
Details on how the circulating fan operates during FAN, HEAT, and COOL modes based on thermostat signals.
Essential checks to complete before starting the unit, including gas type and vent hood installation.
Step-by-step guide for safely starting the unit, including thermostat settings and gas valve operation.
Procedure for safely shutting off the gas supply to the unit, typically for maintenance or service.
Checks to perform after the control circuit is energized and heating is operating, focusing on gas leaks and pressure.
Guidance on adjusting manifold gas pressure using the regulator screw on the automatic gas valve.
Procedure for accessing and servicing the burners, requiring shut-off of gas and power.
Instructions for adjusting the pilot flame using the adjustment screw and ensuring proper flame sensor coverage.
Method for determining furnace temperature rise and calculating CFM based on readings.
Information on the direct drive, constant CFM blower motors and their relation to cooling CFM.
Procedure for checking natural gas input by measuring time for meter dial revolutions and using gas rate tables.
Notes regarding field wiring, motor protection, blower speed selection, and specific wiring configurations.
Units must be installed per national and local safety codes, including electrical and fuel gas codes.
Guidelines for selecting a suitable location for outdoor installation, considering air supply and side placement.
Instructions for safely moving and lifting the unit, emphasizing proper sling use and fork-lift operation.
Details required clearances for unit operation and servicing, referencing specific tables for details.
Adaptation for downflow use and requirements for ductwork design and sizing according to ACCA standards.
Requirements for unit positioning on a roof curb to ensure proper fit and alignment.
Information on filter requirements, including single-phase units needing installer-provided filters.
Recommendation for condensate trap installation and proper plumbing to local codes.
Locations for accessing serviceable components like blower, gas control, and refrigerant connections.
Field wiring must conform to NEC/CEC codes; unit must be grounded; fused disconnect switch required.
Details on scroll compressors designed for R-410A, POE oil properties, and handling precautions.
Explanation of three-phase scroll compressor rotation and how to correct misphasing for proper operation.
Proper gas piping sizing depends on flow rate, gas gravity, and run length; follow codes and tables.
Routing the gas supply line through designated holes and typical piping arrangements.
Instructions for installing the flue vent hood to ensure proper unit operation and safety warnings.
Step-by-step process of the unit's heating cycle, including thermostat activation and safety controls.
Description of safety controls like Limit Switch, Pressure Switch, Flame Sensor, Rollout Switch, and Auxiliary Limit Switch.
Step-by-step process of the unit's cooling cycle, including thermostat activation and fan operation.
Description of safety controls for cooling, including High Pressure (HP) and Low Pressure (LP) switches.
Details on how the circulating fan operates during FAN, HEAT, and COOL modes based on thermostat signals.
Essential checks to complete before starting the unit, including gas type and vent hood installation.
Step-by-step guide for safely starting the unit, including thermostat settings and gas valve operation.
Procedure for safely shutting off the gas supply to the unit, typically for maintenance or service.
Checks to perform after the control circuit is energized and heating is operating, focusing on gas leaks and pressure.
Guidance on adjusting manifold gas pressure using the regulator screw on the automatic gas valve.
Procedure for accessing and servicing the burners, requiring shut-off of gas and power.
Instructions for adjusting the pilot flame using the adjustment screw and ensuring proper flame sensor coverage.
Method for determining furnace temperature rise and calculating CFM based on readings.
Information on the direct drive, constant CFM blower motors and their relation to cooling CFM.
Procedure for checking natural gas input by measuring time for meter dial revolutions and using gas rate tables.
Notes regarding field wiring, motor protection, blower speed selection, and specific wiring configurations.
General| Brand | York |
|---|---|
| Model | DNZ 024 |
| Category | Air Conditioner |
| Language | English |
