York 251934-YTG-J-0910 manual Reheat Mode Sequence Of Operation, Normal Mode, Alternate Mode

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251934-YTG-J-0910

Dirty Filter Switch

Double Wall

Phase Monitor

Coil Guard

Powered GFI Convenience Outlet

Non-powered GFI Convenience Outlet

Bas Controls - Simplicity® Intelli-Comfort™, CPC,

JOHNSON, HONEYWELL, NOVAR, YORK COMMERCIAL COMFORT SYSTEM (YCCS)

BAS Ready Economizer (2-10 V.D.C. Actuator Without a Controller)

Hinged Filter Door Access And Tool Free Access Panels

Hinged Tool Free Blower, Blower Motor, Filter And Electrical Access Panels

High Static Drive

Low Static Drive (ZJ/ZR/ZF300 only)

2" Pleated Filters

4" Throw Away Filters

Disconnect Switch

Supply Air Smoke Detector

Return Air Smoke Detector

Reheat Mode Sequence Of Operation

The reheat control board allows the user to select two different modes of operation via a jumper connection on the board. (See Reheat Control Board.) Each mode is described below. Refer to Reheat Controls - Part 1 and Part 2 when reading this section.

“Normal” Mode

When the reheat control board (RCB) detects a need for dehumidification (24VAC) at "HUM" via the field supplied dehumidistat connected to RHTB-1 and RHTB-2 and there is not a call for cooling, it energizes the hot gas relay (HGR), which energizes the 3-way valve (SOL 3), the condenser coil valve (SOL 2), and de-energizes the reheat coil bleed valve (SOL 1). The Y1 signal is passed to the unit control board (UCB), which engages circuit # 1, resulting in circuit #1 reheat mode operation.

When the room thermostat calls for first stage cooling, with or without a call for dehumidification, the RCB senses a signal through "Y1", de-energizing the HGR, which de-energizes SOL

3 and SOL 2, and energizes SOL 1, engaging circuit # 1, resulting in circuit #1 cooling mode operation.

When the room thermostat calls for second stage cooling, the RCB senses a signal through "Y1" & "Y2" and engages circuit #1 and circuit #2 in the cooling mode.

Indoor blower operation is initiated upon a call for first stage cooling, second stage cooling or dehumidification.

Anytime there is a call for 2 stages of cooling, the unit will not operate in the reheat mode, even if there is a call for dehumidification at "HUM".

The unit will not operate in the reheat mode if there is any call for heating.

On units with economizers, the unit will not operate in the reheat mode if there is a call for cooling and the economizer is operating as first stage of cooling.

All safety devices function as previously described.

"Alternate” Mode

When the RCB detects a need for dehumidification (24VAC) at "HUM" via the field supplied dehumidistat connected to RHTB-1 and RHTB-2, and there is not a call for cooling, it energizes the HGR, which energizes the SOL 3, SOL 2, and de-energizes SOL 1. The unit then operates with circuit #1 in reheat mode and circuit #2 in cooling mode.

When the room thermostat calls for first stage cooling while there is still a call for dehumidification, no operational change is made. The call for cooling is ignored and the unit continues to operate with circuit #1 in reheat mode and circuit #2 in cooling mode.

When the room thermostat calls for second stage cooling, the RCB senses a signal through "Y1" & "Y2" and de-energizes the HGR, which de-energizes SOL 3 and SOL 2, and energizes SOL 1. Both circuits operate in the cooling mode.

Indoor blower operation is initiated upon a call for first stage cooling, second stage cooling or dehumidification.

Anytime there is a call for 2 stages of cooling, the unit will not operate in the reheat mode, even if there is still a call for dehumidification at "HUM".

The unit will not operate in the reheat mode if there is any call for heating.

All safety devices function as previously described.

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Johnson Controls Unitary Products

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Contents ZJ/ZR Shown DescriptionTable of Contents Component Location ZJ shownNomenclature Ton Sunline Magnum Model Number NomenclatureFeatures and Benefits Standard FeaturesBalanced Heating Factory Installed Options For 5-hp motor applications Field Installed Accessories Control OptionsGuide Specifications Indoor Evaporator Fan AssemblyGeneral DescriptionOutdoor Condenser Fan Assembly Refrigerant ComponentsUnit Controls Gas Heating Section ZJ/ZR/ZF***N ModelsUnit Operating Characteristics Other Pre-engineered Accessories AvailableElectric Heating ZJ/ZR/ZF***C/E Models Electrical RequirementsReheat Mode Sequence Of Operation Normal ModeAlternate Mode Reheat Control Board Reheat Controls PartRHB Physical Data ZJ180-300 Physical DataFilters ZR180-300 Physical Data No. speeds Number of motors Motor HP each ZF180-300 Physical Data AFUE%ZJ/ZR/ZF180-300 Unit Limitations MinCapacity Performance ZJ180-300 Cooling CapacitiesZJ180 15 Ton 115F 125F ZJ210 17.5 Ton ZJ210 17.5 Ton ZJ240 20 Ton ZJ240 20 Ton ZJ300 25 Ton ZJ300 25 Ton ZR180-300 Cooling and Reheat Capacities ZR180 15 TonZR180 15 Ton ZR180 15 Ton Alternate Reheat Mode 35F 45FSensible Capacity MBh ZR240 20 Ton 115F 125F ZR240 20 Ton Alternate Reheat Mode 75F 85F ZR300 25 Ton 115F 125F ZR300 25 Ton Alternate Reheat Mode 75F 85F ZF180-300 Cooling Capacities ZF180 15 Ton115F 125F ZF210 17.5 Ton ZF210 17.5 Ton ZF240 20 Ton ZF240 20 Ton ZF300 25 Ton ZF300 25 Ton Airflow Performance ZJ180-300 Side Duct ApplicationZJ180 15 Ton Side Duct ZJ210 17.5 Ton Side DuctZJ240 20 Ton Side Duct ZJ300 25 Ton Side Duct ZJ180-300 Bottom Duct Application ZJ180 15 Ton Bottom DuctZJ210 17.5 Ton Bottom Duct ZJ240 20 Ton Bottom Duct ZJ300 25 Ton Bottom Duct ZR180-300 Side Duct Application ZR180 15 Ton Side DuctZR240 20 Ton Side Duct ZR300 25 Ton Side Duct ZR180-300 Bottom Duct Application ZR180 15 Ton Bottom DuctZR240 20 Ton Bottom Duct ZR300 25 Ton Bottom Duct ZF180-300 Side Duct Application ZF180 15 Ton Side DuctZF210 17.5 Ton Side Duct ZF240 20 Ton Side Duct ZF300 25 Ton Side Duct ZF180-300 Bottom Duct Application ZF180 15 Ton Bottom DuctZF210 17.5 Ton Bottom Duct ZF240 20 Ton Bottom Duct ZF300 25 Ton Bottom Duct RPM Selection Additional Static ResistanceDrive Selection Altitude/Temperature Correction Factors Air Temperature ºF Gas Heat Minimum Supply AirFactor CorrectionIndoor Blower Specifications Power Exhaust SpecificationsElectric Heat Minimum Supply Air ZJ/ZR/ZF Indoor Sound Power Levels ZJ/ZR/ZF Outdoor Sound Power LevelsSound Performance Electric Heat MultipliersZJ180-300 Standard Drive Without Powered Convenience Outlet Electrical DataZJ180 MCA ZJ180-300 Standard Drive With Powered Convenience Outlet Model Stages AmpsZJ180-300 Standard Drive With Powered Convenience Outlet Conv YTG-J-0910 ZJ180-300 High Static Drive With Powered Convenience Outlet ZJ180-300 High Static Drive With Powered Convenience Outlet ZJ300 Low Static Drive Without Powered Convenience Outlet ZJ300 Low Static Drive With Powered Convenience OutletZR180-300 Standard Drive Without Powered Convenience Outlet ZR180ZR180-300 Standard Drive With Powered Convenience Outlet YTG-J-0910 ZR180-300 High Static Drive With Powered Convenience Outlet ZR300 Low Static Drive Without Powered Convenience Outlet ZR300 Low Static Drive With Powered Convenience OutletZF180-300 Standard Drive Without Powered Convenience Outlet ZF180Pwr Max Fuse Motors ZF180-300 Standard Drive With Powered Convenience Outlet ZF180-300 Standard Drive With Powered Convenience Outlet ZF180-300 Hi Static Drive Without Powered Convenience Outlet ZF180-300 Hi Static Drive Without Powered Convenience Outlet ZF180-300 Hi Static Drive With Powered Convenience Outlet ZF180-300 Hi Static Drive With Powered Convenience Outlet ZF180-300 Low Static Drive With Powered Convenience Outlet ZJ/ZR/ZF180-300 Wiring Diagrams ZJ180-300 Typical Control DiagramZR180-300 Typical Control Diagram OCC Terminal BlockZF180-300 Typical Control Diagram OCCWeights and Dimensions ZJ/ZR/ZF180-300 Unit WeightsZF Unit 4 Point Load Weight ZF Unit 6 Point Load Weight ZJ/ZR/ZF180-300 Unit Accessory Weights Supply Fan VFD Weights, in LbsUnit Dimensions ZJ/ZR Unit Dimensions Front ViewUtilities Entry Front View ZJ/ZR/ZF Unit Dimensions Rear View For bottom duct applicationsFor side duct applications ZJ/ZR/ZF Unit Dimensions Rain Hood ZJ/ZR/ZF180-300 Unit ClearancesUnit Accessory Dimensions ZJ/ZR180-300, ZF210-300 Roof CurbZF180 Roof Curb ZJ/ZR/ZF180-300 Typical Installation Johnson Controls Unitary Products York Drive Norman, OK

251934-YTG-J-0910 specifications

York 251934-YTG-J-0910 is an innovative climate control system designed for both residential and commercial applications. This unit stands out for its advanced engineering, eco-friendly technologies, and user-centric features. With a focus on efficiency and sustainability, the York 251934-YTG-J-0910 offers a powerful solution for maintaining optimal indoor climates.

One of the main features of the York 251934-YTG-J-0910 is its high-efficiency operation. The unit boasts impressive Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF) ratings, which indicate its ability to provide significant energy savings compared to traditional systems. The use of variable speed technology further enhances its efficiency, allowing the system to adjust its output based on real-time demand, leading to quieter operation and reduced energy consumption.

The York 251934-YTG-J-0910 incorporates cutting-edge inverter technology, which enables smooth transitions between different performance levels. This ensures consistent comfort while minimizing energy usage, making it an ideal choice for eco-conscious consumers. The unit also includes advanced inverter-driven compressors that enable faster cooling and heating capabilities, providing rapid comfort during extreme temperature conditions.

In terms of environmental impact, the York 251934-YTG-J-0910 is designed to operate with lowGlobal Warming Potential (GWP) refrigerants. This not only contributes to reduced greenhouse gas emissions but also aligns with global sustainability efforts. The unit is compliant with various environmental regulations, making it a responsible choice for climate-conscious users.

Another notable characteristic of this system is its intuitive smart controls. The York 251934-YTG-J-0910 is compatible with Wi-Fi-enabled thermostats and smart home systems, allowing users to monitor and adjust their indoor climate remotely. This level of connectivity offers convenience, energy management, and peace of mind.

Durability and reliability are also paramount to the York brand, and the 251934-YTG-J-0910 reflects this commitment. The unit features a robust construction with corrosion-resistant materials, ensuring longevity even in the harshest environments. Comprehensive warranties accompany the product, underlining the manufacturer’s confidence in its performance and durability.

In summary, the York 251934-YTG-J-0910 combines high efficiency, advanced technology, environmental responsibility, and user-friendly features, positioning it as a top contender in the climate control market. With its commitment to comfort and sustainability, it appeals to both residential and commercial users looking for reliable and efficient climate management solutions.