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Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with instructions could result in personal injury and/or property damage!
Model PVF
General Safety Information
These indirect gas-fired furnaces are commonly used
in many different manufacturer's ventilating products.
For unit-specific information, refer to the Installation,
Operation and Maintenance manual (IOM) for the unit in
which this furnace is installed.
• Both the furnace units are listed for installation in the
United States and in Canada.
• Installation of gas-fired duct furnaces must conform
with local building codes. In the absence of local
building codes, installation must conform to the
National Fuel Gas code, ANSI Z223.1 or in Canada,
CAN/CGA-B149 Installation codes.
• All electrical wiring must be in accordance with the
regulations of the National Electric Code, ANSI/
NFPA-70.
• Unit is approved for installation downstream from
refrigeration units. In these conditions, condensate
could form in the duct furnace and provision must be
made to dispose of the condensate.
®
Indirect Gas-Fired Heat Modules
Model PVG
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Do not touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
FOR YOUR SAFETY
The use and storage of gasoline or other
flammable vapors and liquids in open
containers in the vicinity of this appliance is
hazardous.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause injury or
death. Read the installation, operating and
maintenance instructions thoroughly before
installing or servicing this equipment.
Indirect Gas-Fired Heat Modules
Document 474645
Model PVF and PVG
Recognized Component
1
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Summary of Contents for Greenheck PVF
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Page 1: General Safety Information
Document 474645 Model PVF and PVG Indirect Gas-Fired Heat Modules ® Installation, Operation and Maintenance Manual Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure... -
Page 2: Receiving, Unpacking, Storage
Mylar data label. See image below. Locate the ETL Listing furnace model number at the top of the label and record Model PVF and PVG furnaces have been ETL tested it here: as gas-fired heat modules intended for installation as a... -
Page 3: Table Of Contents
Table of Contents General Safety Information ....1 Performance Data ......15 Receiving, Unpacking, Storage . -
Page 4: Furnace Control Center
Furnace Control Center Typical Furnace Control Logic In all cases, refer to the unit-specific wiring diagram Each ventilating unit containing a furnace or a pair of located on the unit control center door. furnaces will have a furnace control center located on This illustration is only for a typical 4:1 turndown the furnace vest plate. -
Page 5: Typical Furnace, Electrical And Control Components
Typical Furnace, Electrical and Airflow Switch Control Components Airflow switches are used on both furnaces and are found on the furnace Microprocessor vest plate. If the combustion blower is multi-speed, there will be two of The microprocessor provides them and each will switch in response the call for heat to the ignition to a different pressure. -
Page 6: Gas-Fired Burner Turndown
Gas-Fired Burner Turndown Combinations Various combinations of the methods outlined may be Furnaces are available in single stage, multi-stage or used to accomplish the turndown requested by the electronically modulated configurations. In single stage, customer. the entire furnace is either on or off. In multi-stage Available turndown control options include: furnaces, combustion occurs in stages and is expressed as the number of different stages (example: 8 stage). -
Page 7: Installation Of Venting For Outdoor Units
Installation of Venting for Installation of Venting for Outdoor Units Indoor Units Follow Guidelines WARNING All of the following guidelines must be followed when The following guidelines must be followed for all indoor installing the unit. units: WARNING 1. Installation of venting must conform with local building codes. -
Page 8: Venting Methods
Venting Methods There are three venting methods for indoor mounted Exterior A = 12 inch minimum Wall units. For each method, the units can be vented horizontally through an exterior wall or vertically through the roof. Specific venting instructions are Pitch vent pipe downward provided for each method and shown in the following... -
Page 9: Installation Of Concentric Venting
Installation of Concentric Venting Concentric Venting – Horizontal Refer to the diagram below for venting on horizontal Concentric venting allows the exhaust pipe and concentric systems. Maintain at least 12 inches from combustion air pipe to pass through a single hole in the the combustion air inlet guard to the exhaust vent roof or wall of the building. - Page 10 Concentric Venting – Vertical Install Exhaust Pipe Slide the exhaust pipe through the CVA. Provide enough Refer to the diagram below for venting on vertical exhaust piping to pass through the wall (or floor) and concentric systems. Maintain at least 12 inches provide the minimum clearance of 12 inches between between the top of the combustion air inlet terminals the exhaust pipe termination and the combustion air...
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Page 11: Two-Pipe Venting - Horizontal
Installation of Two Pipe Venting – Install Exhaust Pipe Horizontal Slide the exhaust pipe through the CVA. Provide enough exhaust piping to pass through the roof and provide the Refer to the diagram below for venting on horizontal minimum clearance of 12 inches between the exhaust concentric systems. -
Page 12: Vertical
Install Combustion Air Pipe Vent Length Run a combustion air pipe from the unit’s combustion Refer to table for minimum and maximum vent lengths. air intake through the exterior wall to the outdoors. The The minimum vent length is 10 feet and the maximum combustion air pipe must terminate at least 12 inches vent length is 70 feet. -
Page 13: Installation Of Control Wiring
Installation of Control Wiring Installation of Gas Piping Disconnect power supply before making any wiring IMPORTANT connections to prevent electrical shock and equipment All gas piping must be installed in accordance damage. with the latest edition of the National Fuel Gas All appliances must be wired strictly in accordance with Code ANSI/Z223.1 and any local codes that may the wiring diagram furnished with the unit. -
Page 14: Gas Supply Requirements
Determine the Gas Supply Requirements Install Additional Regulator (if required) The data label located on the face of the furnace lists If the gas supply pressure exceeds 14 in. wg, an the requirements for the gas being supplied to the unit. additional regulator must be installed to reduce the pressure. -
Page 15: Sequence Of Operation
Sequence of Operation 8:1 Stage Control - The furnace controller will ignite Start-Up / Standby the necessary manifolds at 100% for 30 seconds, Prior to start-up, verify that all field-installed sensors after which the unit or furnace controller will operate have been installed. -
Page 16: Gas Valves
Gas Valves Overview of typical Two Stage Valve. Used in eight Overview of typical Single Stage Valve. Used in 4:1 and stage and two stage furnaces. 2:1 Electronic Modulation and in Single Stage Furnaces Gas Control Knob Gas Control Knob (ON / OFF) (ON / OFF) Low Fire... -
Page 17: Start-Up - Furnaces (All Units)
Start-Up - Furnaces (all units) With 4:1 Turndown Electronic Modulation IMPORTANT For the unit to function properly, ALL gas valves must Remote Temperature have their high fire and low fire settings adjusted for Sensor field conditions. FX Controller IMPORTANT Confirm the discharge air sensor is installed at least three duct diameters downstream of the furnace. -
Page 18: Adjust High Fire And Low Fire Settings
At start-up, remove the cover from the circuit board Modulating Valve High Fire Setting housing by loosening the two Phillips head retaining 1. Connect a manometer to the test port on the burner screws. Identify Button #1 and Button #2 and also manifold. -
Page 19: 2:1 Turndown Electronic Modulation
With 2:1 Turndown Electronic Modulation The modulating gas valve and the single stage valve are both controlled by an A1092 Control System. 1. Connect a manometer to the test port on the burner Remote Temperature Sensor manifold. MAXITROL SELECTRA 2. Set the furnace to High Fire by turning the MAXITROL temperature on the remote temperature selector dial SELECTRA... -
Page 20: Stage Combustion
With 8 Stage Combustion 8. Turn off furnace. Reconnect the wire to the high fire terminal. Remove manometer and reinstall plug into manifold test port. 9. Connect manometer to the other manifold test port Remote Temperature and repeat the high fire / low fire set up sequence on Sensor the other gas valve. -
Page 21: Stage Combustion
With 2 Stage Combustion With Combination Turndown Configurations There are several different turndown options that may Remote Temperature be used in the units that are simply combinations of Sensor basic configurations. In all cases, all gas valves must be set for high fire A350 and low fire as part of the Start-Up process. -
Page 22: Ignition Controller
Troubleshooting-Ignition Controller Ignition lockout (1 red flash for start-up, 4 red flashes for during operation) NOTE Possible Cause Solution The green LED light indicates NORMAL operation Manual gas valve Open manual valve. If combination while the red LED light indicates an ERROR operation. not open valves are used, verify that switch on top is in “ON”... -
Page 23: 4:1 Electronic Modulation
Troubleshooting 4:1 Modulating Furnace Will Not Light In all cases, verify correct terminals as shown on the unit-specific wiring diagram. 24 VAC across R and L? Main disconnect (DS1) open or defective Close, repair or replace Main transformer (TR1) fault Replace main transformer 24 VAC across W1 and L? Heat switch (S4) open or not wired... - Page 24 Troubleshooting 4:1 Modulating Furnace Will Not Light In all cases, verify correct terminals as shown on the unit-specific wiring diagram..continued from previous page High limit switch (HLC#) open? Discharge temperature was above high limit setting Let cool then reset high limit. Ignition controller (IC#) red LED blinks 7 times or is on...
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Page 25: 2:1 Electronic Modulation
Troubleshooting 2:1 Modulating Furnace Will Not Light In all cases, verify correct terminals as shown on the unit-specific wiring diagram. 24 VAC across R and C? Main disconnect (DS1) open or defective Close, repair or replace Main transformer (TR1) fault Replace main transformer 24 VAC across W1 and C? Heat switch (S4) open or not wired... -
Page 26: Stage
Troubleshooting 8 Stage Furnace Will Not Light In all cases, verify correct terminals as shown on the unit-specific wiring diagram. 24 VAC across R and C? Main disconnect (DS1) open or defective Close, repair or replace Main transformer (TR1) fault Replace main transformer 24 VAC across W1 and C? Heat switch (S4) open or not wired... - Page 27 Troubleshooting 8 Stage Furnace Will Not Light In all cases, verify correct terminals as shown on the unit-specific wiring diagram..continued from previous page. With the combustion blower (CM) on for at least 30 seconds, is there 24 VAC across T and A or E? Furnace controller (SC1) defective Replace furnace controller (SC1) Ignition controller (IC#)
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Page 28: Single And Two Stage
Troubleshooting Single or 2:1 Stage Furnace Will Not Light In all cases, verify correct terminals as shown on the unit-specific wiring diagram. 24 VAC across R and C? Main disconnect (DS1) open or defective Close, repair or replace Main transformer (TR1) fault Replace main transformer 24 VAC across W1 and C? Heat Switch (S4) open... -
Page 29: Reference: Fx Controller
Reference - FX Controller If the FX controller detects a fault, it will go into alarm condition and a message code will appear on the The FX controller is a programmable electronic screen. Message codes that may appear include: controller that is used on the 4:1 electronically Display Text Significance modulated furnace and the 8:1 staged furnace. -
Page 30: Outside Air Temperature
Field Adjustments Access the Discharge Air Temperature Setting Field adjustments that can be made to the FX controller Go to the Setpoints include: Menu and then scroll up • Go to high fire and return or down until the display •... -
Page 31: Furnace Control With Microprocessor
Furnace Control with Microprocessor Burners and Orifices Control Before each heating season, examine the burners and gas orifices to make sure they are clear of any debris If the unit is equipped with a microprocessor control, such as spider webs, etc. Clean burner as follows: the furnace controller acts as an interface between the microprocessor controller and the furnace. -
Page 32: Maintenance Log
_________________________________________________ _________________________________________________ Our Commitment As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice. Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the Library under Warranties.
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