York FC8V*DH, PV8*DH, FL8V*DH Control Board, Heating Airflow, Adjustment of FAN Control Settings

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271015-UUM-A-0407

5.1st and 2nd Stage called simultaneously

•The 1st stage call is processed as described in paragraph 1 above.

•Once Flame Rectification is established, 2nd Stage is entered immediately as described in paragraph 2 above.

6.1st and 2nd Stage satisfied simultaneously

•Both stages of the Gas Valve are de-energized.

•Flame Rectification is lost.

•The Inducer and Hum relays are de-energized after a 15-second post purge.

•30 seconds later the Control shifts the Blower from Heat High to Heat Low.

•After the Blower-Off Delay Circuit is satisfied, the Blower and EAC are de-energized.

7.Manual Fan Operation

•With the thermostat in the Fan On position, a circuit is completed between R and G of the Control.

•The Heat Low and EAC relays are energized by the Control.

8.Call for Cooling

•The thermostat closes two circuits R to Y and R to G. Since the Outdoor Unit is connected to Y and C at the Control, it is ener- gized.

•The Cool and EAC relays are energized by the Control.

•A Blower-Off Delay Timing Circuit is energized by the call on Y.

9.Cooling call satisfied

•The thermostat opens the R to Y and R to G circuits.

•The Outdoor Unit is de-energized.

•The 60-second, Blower-Off Delay, timing circuit is initiated.

•After 60 seconds, the Cool and EAC relays are de-energized.

10.Two-stage cooling. This furnace is equipped to handle a two-stage AC unit.

•The wall thermostat will energize the Y1 circuit for low cooling and the Y2 circuit for high cooling.

CONTROL BOARD

Variable speed motors will adjust the motor speed in order to maintain the indoor fan CFM. The control board is used to control the blower speed thus the CFM when the unit is operating in the heating or cooling modes. The blower CFM for cooling can be modified by changing the jumper pin position on the taps selection marked COOL and ADJ.

The blower CFM for heating can be modified by changing the jumper pin position on the taps selection marked HEAT. The taps selection pins have been preset at the factory to provide the maximum CFM. “Air Flow Data” table in the installation manual list the recommended jumper pin settings.

If a lesser CFM is required for a specific HVAC system the taps selec- tion pins can be moved to the "B", "C", or "D" positions. Pin "A" will pro- vide the highest CFM and "D" will provide the lowest CFM. The taps selection marked DELAY are used for cooling only. The recommended settings for these jumper pins are listed in Delay taps selection.

HEATING AIRFLOW

The heating airflow has been preset at the factory to provide maximum CFM. If a lesser CFM is required for a specific HVAC system the “JUMPER” on the HEAT selection pins on the control board may be moved to tap “B”, “C”, or “D”.

HEAT Taps Selection on the control board. Pin Position A: will provide the highest CFM.

Pin Position B and C: are the medium and medium low CFM settings.

Pin Position D: will provide the lowest CFM.

Refer to “Air Flow Data” table in the installation manual for the proper “HEAT” Taps Selection for the model furnace you are installing.

NOTE: When changing jumper positions, make sure that the jumper is pushed all the way on the pins. If the jumper is not making good contact or is left off completely, the blower will operate as if the jumper were in the “A” position.

NOTE: Power to the blower must be removed for at least 4 seconds after a heat or cool tap selection change, in order for the motor to recog- nize an adjustment. The fixed blower on delay and adjustable blower-off delay will function as described in the “OPERATION AND MAINTE- NANCE" Section in the Users Information Manual.

ADJUSTMENT OF FAN CONTROL SETTINGS

Heating Indoor Fan Off Delay

Changing the blower delay jumper on the Furnace Control Board can change the indoor fan “OFF” time delay. Refer to Figure 6 for the jumper settings to obtain the desired fan OFF delay. The blower off delay must be long enough to adequately cool the furnace, but not so long that cold air is blown into the living space.

The blower on delay is fixed at 30 seconds and cannot be adjusted.

 

HEAT

HI HEAT

CONTINUOUS

BLOWER

DEHUMIDISTAT

FAN SPEED

DELAY

JUMPER

DELAY

JUMPER

OFF DELAY

JUMPER

 

JUMPER

 

JUMPER

 

 

 

LOW

VOLTAGE

TERMINALS

COOLING

PROFILE

JUMPER

BLOWER

SPEED

JUMPERS

FIGURE 6: Furnace Control Board

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Unitary Products Group

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Contents Contact Information Table of ContentsSafety What to do if YOU Smell GASInstructions for Examining the Furnace Installation Fire or Explosion HazardSTART-UP and Shutdown Instructions Furnace User MaintenanceHOW Your GAS Furnace Works Operating InstructionsSafety Section Furnace Maintenance SectionCleaning the Heat Exchanger Furnace Cleaning SectionBurner Removal/Cleaning Sequence of OperationControl Board Adjustment of FAN Control SettingsHeating Indoor Fan Off Delay Heating AirflowTroubleshooting Furnace Control DiagnosticsDiagnostic Fault Code Storage and Retrieval Ignition ControlFurnace Control Event Schedule Section III Replacement Parts List AIR Moving Replacement Part Contact Information Model no Description Used withSection IV Wiring Diagram UUM-A-0407 UUM-A-0407 Unitary Products Group Exclusions Unitary 5005 Norman Products York Group Drive 7306980%

LL8V*DH, LC8V*DH, FL8V*DH, FC8V*DH, PV8*DH specifications

The York FL8V*DH, LC8V*DH, PV8*DH, LL8V*DH, and FC8V*DH series represent a range of advanced heating and cooling solutions tailored to meet the needs of both residential and commercial applications. These units are engineered with cutting-edge technologies that enhance energy efficiency, performance, and user comfort, making them a top choice for HVAC needs.

One of the standout features of these systems is their high-efficiency design, which often exceeds industry standards. The FL8V*DH, for example, boasts an impressive SEER (Seasonal Energy Efficiency Ratio) rating, allowing users to save on energy costs while ensuring optimal heating and cooling comfort. The innovative design minimizes energy consumption without compromising performance, which is critical in today’s eco-conscious market.

Another hallmark of these series is their use of advanced refrigerant technology. Utilizing environmentally friendly refrigerants, such as R-410A, these units deliver excellent heat transfer while reducing the overall carbon footprint. This focus on sustainability ensures that customers can feel good about their choice, contributing positively to the environment.

The technology behind these models extends to their variable-speed blower motors, which provide precise airflow and temperature control. This flexibility allows adjustments based on real-time demand, enhancing comfort and reducing energy usage. The use of smart thermostats with these systems enables users to program schedules, monitor usage, and optimize settings remotely, further improving efficiency.

In terms of durability and reliability, the York series is built from high-quality materials designed to withstand the test of time. Robust construction minimizes maintenance needs, resulting in lower long-term ownership costs. Additionally, many units feature quiet operation technologies, ensuring minimal noise disturbance, which is particularly important in residential settings.

Moreover, installation and servicing of the York FL8V*DH, LC8V*DH, PV8*DH, LL8V*DH, and FC8V*DH systems are made simpler through their user-friendly designs. Easy access points for maintenance staff help to reduce downtime and enhance system longevity.

Overall, the York FL8V*DH, LC8V*DH, PV8*DH, LL8V*DH, and FC8V*DH units stand out due to their efficiency, innovative technology, durability, and user-friendly design, marking them as exceptional choices in the HVAC market. These systems not only provide comfort but also align with energy-saving initiatives, making them a wise investment for the future.
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