Thermo Products PHCFA072DV4R operation manual On and OFF Blower Delay Time Switch Settings

Page 27

Motor Blower Speed

Three interconnected blower speed outputs are provided. A “G” call for fan will provide power to the LOW speed tap only. A “W” heat call will provide power to the Heat speed tap only. A “Y” cooling call will provide power to the Cool speed tap only.

In the case of thermostat calls for “Y” and “W” together, blower speed selection will be determined by the input that was first initiated. In the case where the control is in a cooling mode with both “Y” and “W” inputs energized and then the “Y” input is removed, the cooling blower off time will be executed prior to the control switching into a heating mode. In the case where the control is in a heating mode with both “Y” and “W” inputs energized and then the “W” input is removed, the heating blower off time will be executed prior to the control switching into a cooling mode. In the case where a call for fan “G” already exists and either a “W” or a “Y” call is initiated, the blower speed will switch to the respective “W” or a “Y” speed following the blower on delay for that call.

The speed taps are interconnected and interlocked, only one speed may be powered at any one time. When a speed is to be operated, the speed select relays are operated to select the path to the motor tap and then the enable relay is operated to switch the operating power to the selected motor speed tap. If the speed of the running motor is to be changed, first the enable relay removes power from the motor, the new speed is selected and then power is restored to the motor.

Blower On and Off Delays

Four Heat blower on and four blower off delays are selected by two dip switches for each function. Refer to Table 7 for specific delay values.

DIP SWITCH 2 SECTION STATE

BLOWER DELAY TIMES

 

1

2

3

4

 

ON - SEC

 

OFF - MIN

 

 

 

 

 

 

 

 

OFF

OFF

 

 

 

30

 

 

 

 

 

 

 

 

 

 

ON

OFF

 

 

 

60

 

 

 

 

 

 

 

 

 

 

OFF

ON

 

 

 

120

 

 

 

 

 

 

 

 

 

 

ON

ON

 

 

 

240

 

 

 

 

 

 

 

 

 

 

 

 

OFF

OFF

 

 

 

2

 

 

 

 

 

 

 

 

 

 

ON

OFF

 

 

 

4

 

 

 

 

 

 

 

 

 

 

OFF

ON

 

 

 

6

 

 

 

 

 

 

 

 

 

 

ON

ON

 

 

 

8

 

 

 

 

 

 

 

 

Table 7: ON and OFF Blower Delay Time Switch Settings

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Contents OHCFA072DV4R OIL Fired FurnaceContents = Front = Highboy D = DownflowSafety Section WARNING and CautionsCAUTION do not Attempt to Start the Burner When Page Codes and Clearances OHCFA072DV4R Combustible materialNon-combustible material HighboyII. General Instructions Venting Fig-1 Fig-2 Installation of VentorFig-3 Page Fig-4 Condensate Drain Line ConnectionsDuct WORK/AIR Conditioning Air Filter Mounted External to Furnace Maximum Model Number Filter Type Air Velocity OHCFt/min Fig-7 Burner InstallationBurner Specifications and Applications Limit Position and Location75,000 72,000 OIL Tank and PipingRiello BTU/HR OHCFA072DV4RPage Electrical Wiring Electrical ConnectionsRoom Thermostat Electronic Air Cleaner EAC and Humidifier Installation Post-Purge TimerBlower Motor Speed Selection Thermostat Anticipator SettingAlterations REQ’D for A/C @ Design External Static Pressure OHCFA072DV4Terminal Definitions & Field Wiring Blower Controller Information for ECM MotorInputs Outputs Operating Modes On and OFF Blower Delay Time Switch Settings Trouble Shooting Startup ProceduresDiagnostic Features Sequence of Operation for the OHC To Turn Off Oil to AppliancePage Page Setting Supply Air Temperature Rise Adjustment Of Heat Input RateCheckout Procedure  Caution do not Attempt to Make Repairs Yourself Filter Cleaning and LocationIII. Users Information Section Inspection AreasIV. Installers Instructions to User General Inspection Dealer Maintenance Safety During Servicing and InspectionHeat Exchanger Cleaning Instructions Page Fig-12 Fig-13 SUPPLY/RETURN AIR Filter Filter maintenance procedureElectrical System SUPPLY/RETURN AIR BlowerFilter replacement Extended Appliance ShutdownOn Shutdown On Startup VI. HOMEOWNER/USER Information and Routine Maintenance Fig-16 Page Page Page Page Page Page Customer Appendix a Replacement Parts OHC BF3 Riello Burner Page Appendix B Wiring Diagram

PHCFA072DV4R specifications

The Thermo Products PHCFA072DV4R is a cutting-edge heating and cooling solution designed for modern residential and light commercial applications. This unit stands out due to its efficient performance and advanced technology. One of the most remarkable features of the PHCFA072DV4R is its energy efficiency. It boasts a high SEER rating that ensures reduced energy consumption without sacrificing comfort, making it an environmentally friendly choice for homeowners.

This system utilizes an inverter-driven compressor, which allows for variable speed operation. This means that the unit can adjust its output to match the specific heating or cooling needs of a space, providing more consistent temperatures and enhanced comfort. Additionally, this inverter technology minimizes noise levels, making the PHCFA072DV4R a quieter option compared to traditional fixed-speed systems.

Another noteworthy characteristic of the PHCFA072DV4R is its advanced filtration system. It is equipped with high-efficiency filters that effectively capture dust, pollen, and other airborne particles, ensuring improved indoor air quality. For those who suffer from allergies or have respiratory issues, this feature can provide significant relief.

The unit offers a user-friendly interface with a smart thermostat that enables users to control the system remotely. Through a mobile app, homeowners can adjust settings, set schedules, and monitor energy usage from anywhere, which adds a layer of convenience to the overall user experience.

Additionally, the PHCFA072DV4R is built with durability in mind. Its robust construction and high-quality materials ensure long-term reliability, reducing the likelihood of costly repairs. It also comes with a warranty that reflects the manufacturer's confidence in the product's performance.

Overall, the Thermo Products PHCFA072DV4R encapsulates efficiency, comfort, and advanced technology in a single package. Its ability to adapt to varying conditions, combined with features focused on air quality and ease of use, make it a prime choice for anyone looking for a versatile heating and cooling solution. This unit not only meets the demands of today's consumers but also aligns with sustainable practices, making it an ideal addition to any home or business.
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