P/N: MG-511 (Printed Instruction Manual) Note: This page is not to be included as part of printed hard copy. Overall Specifications: Material: white plain paper Printed text: black Binder: staple upper left corner Individual page specifications: Cover page: printed single-side up Warranty page: printed single-side down (facing out as last page of manual) The balance of instruction manual pages to be printed utilizing both front and back side of paper.
GAS FIRED HIGH EFFICIENCY FURNACE DOWN FLOW & DIRECT VENT (SEALED COMBUSTION) MODEL: VMA1-50N & VMA1-75N INSTALLATION AND SERVICE MANUAL For installation in: 1. Manufactured Homes 2. Modular Homes/Buildings 3. Site Constructed—Residential (Single Story Dwellings) FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance.
TABLE OF CONTENTS SECTION I. SAFETY INFORMATION II. BEGINNING PAGE 1 FURNACE SPECIFICATIONS 6 III. GENERAL INSTRUCTIONS AND CLEARANCES 7 IV. GENERAL INSTALLATION A. FURNACE LOCATION B. BASE INSTALLATION C. ALCOVE INSTALLATION D. CLOSET INSTALLATION E. FUEL PIPING F. GENERAL VENTING REQUIREMENTS G. CONNECTING THE EXHAUST VENT, AND COMBUSTION AIR INTAKE H. DIRECT VENTING THROUGH A SIDEWALL I. INSTALLATION OF OUTSIDE EXHAUST/INTAKE TERMINATIONS J.
All installations and services must be performed by qualified service personnel. I. SAFETY INFORMATION This and the following page contain reproductions of the various warning and instruction labels placed on the Condensing Gas Furnaces. Please read and comply with the contents of these labels.
All installations and services must be performed by qualified service personnel. This and the previous page contain reproductions of the various safety and instruction labels placed on the Condensing Gas Furnaces. Please read and comply with the contents of these labels.
All installations and services must be performed by qualified service personnel. The following safety information should be read, understood, and followed by the installer. 1. Use only with type of gas approved for this furnace. Refer to furnace rating plate. 2. Do not install this furnace where it could be exposed to drafts or other wind or moisture conditions. Refer to Section IV of this manual. 3. Provide adequate ventilation air to the furnace space. Refer to Section IV, C and D, of this manual. 4.
All installations and services must be performed by qualified service personnel. : The vent and air intake elbows must be kept away from bushes, shrubs or any vegetation that may restrict the flow of flue products. It must also be kept clear of any leaves, weeds or other combustible materials. Keep the vent hood clear of snow. Avoid locating the terminals in areas where standing water or condensate drippage may be a problem.
All installations and services must be performed by qualified service personnel. : Copper and brass tubing and fittings (except tin lined) shall not be used if the gas contains more than a trace (0.3 grains per 100 cubic ft.) of hydrogen sulfide gas. Check with your gas supplier. : TURN OFF THE ELECTRICAL POWER to the furnace before attempting to change blower speed wiring. : Turn off power to furnace before it is placed into service.
All installations and services must be performed by qualified service personnel. II. FURNACE SPECIFICATIONS - VMA SERIES MODEL INPUT IN BTUH OUTPUT IN BTUH MAIN ORIFICE-NAT. MAIN ORIFICE-LP GAS SUPPLY PRESSURE L.P. MINIMUM NAT. MINIMUM L.P. MAXIMUM NAT. MAXIMUM GAS MANIFOLD PRESSURE L.P. NAT. INTAKE SIZE IN INCHES VENT SIZE IN INCHES NOMINAL TEMPERATURE RISE SEASONAL EFFICIENCY (AFUE*) VMA1-50 VMA1-75 50,000 48,000 75,000 72,000 #42 1.5 mm 11” IN.W.C. 4.5”IN.W.C. 14” IN.W.C. 14” IN.W.C. 10.0” + .03 IN.
All installations and services must be performed by qualified service personnel. INSTALLATION PARTS PACKAGE PARTS PKG# DESCRIPTION J-box cover wire nut 3" stainless steel hose clamp 2-3/8" radiator hose CPVC adapter LP conversion kit VMA*-50 VS00S4182 PART # V350020 V300132 V300276 V410017 V320833 VAOPS7727 QTY 1 2 4 2 1 1 VMA*-75 VS00S4183 PART # V350020 V300132 V300276 V410017 V320833 VAOPS7728 QTY 1 2 4 2 1 1 III. GENERAL INSTRUCTIONS AND CLEARANCES – READ BEFORE START OF INSTALLATION 1.
All installations and services must be performed by qualified service personnel. accordance with the latest edition of the UL Standard for Single and Multiple Station Carbon Monoxide Alarms, UL 2034, or the CSA International Standard, Residential Carbon Monoxide Alarming Devises, CSA 6.19. 5. The installer shall be familiar with and comply with all codes and regulations applicable to the installation of these heating appliances and related equipment.
All installations and services must be performed by qualified service personnel. MODELS VMA FRONT BACK SIDES VENT CONNECTOR(PVC) TOP PLENUM SIDES TOP AND SIDES OF DUCT BOTTOM OF DUCT CLOSET 6” 0” 0” 0” 0” 1” 1” 1” ALCOVE 18” 0” 0” 0” 0” 1” 1” 1” Table 1 This heating appliance must be installed with clearances not less than the minimums shown above as well as ample clearance for easy access to the air filter, blower assembly, burner assembly, controls, and vent connections. IV. GENERAL INSTALLATION A.
All installations and services must be performed by qualified service personnel. Combustible Floor Base Model: V70-BASE Figure 1A. Coil Cabinet Model: VE113S / VE213T Note: Coil Cabinet cannot be utilized as a cottage base. VE113S VE213T Figure 1B.
All installations and services must be performed by qualified service personnel. Cottage Base Model: VCOT-BASE Figure 1C. NOTE: Serves as a plenum for single story applications with exposed supply air systems.
All installations and services must be performed by qualified service personnel. B. BASE INSTALLATION 1. Combustible Floor Base Model: V70-BASE Use the base bottom panel as a template to mark floor opening locations (see Figure 2). Cut a square opening in the floor for the supply air connector duct. Cut the opening 1-inch larger than the square template opening. (duct requires 1-inch clearance to combustible floor). Figure 2. Figure 3.
All installations and services must be performed by qualified service personnel. connector duct. Remove the bottom panel. Cut an opening in the distribution duct slightly larger than the connector duct. (refer to Figure 2 for location of this cut.) Cut the connector duct to length. Install the connector duct. Bend over each tab. Insure an airtight seal by using high temperature sealant or tape on the joint. Reinstall the bottom panel over the connector duct.
All installations and services must be performed by qualified service personnel. D. CLOSET INSTALLATION 1. The return air opening into the closet is to have a minimum free area of 250 sq. in. (see Figure 5). 2. The return air opening may be located in the top, center or (ideally) bottom of the closet door or side wall. Figure 5. : Do not obstruct any return air openings, including the return grille on the furnace. To do so may cause the furnace to activate the high limit and shut down. 3.
All installations and services must be performed by qualified service personnel. E. FUEL PIPING Sizing and installation of fuel lines must be in accordance with Federal, State & Local regulations. Including the National Fuel Gas Code NFPA 54/ANSI-Z233.1 (Latest Edition). NOTE: These furnaces are designed to be gas piped through the left side or the bottom. For service purposes, it is recommended that the gas union be located inside the furnace when possible.
All installations and services must be performed by qualified service personnel. : The furnace and its gas valve must be disconnected from the gas supply during pressure testing of the gas supply system at pressures in excess of 1/2 PSIG or 14 inches w.c F. GENERAL VENTING REQUIREMENTS The VMA furnace venting system must be installed by a qualified service person in accordance with local codes, the National Fuel Gas Code NFPA 54/ANSIZ223.1 (Latest Edition) and these instructions.
All installations and services must be performed by qualified service personnel. MAXIMUM VENT LENGTH VENT SIZE FURNACE MODEL 2 IN. PVC EXHAUST COMBUSTION AIR INTAKE VENT ELBOWS (NO.) ELBOWS (NO.) VMA 30 8* 7** *Note the drain elbow supplied with VMA furnaces count as 1 elbow. **Note the two 45° elbows supplied w/VMA furnace count as 1 elbow. VENT LENGTH (FT.) Table 2 6. A hack saw may be used to cut the PVC pipe. It must be cut smoothly at right angles with all burrs removed.
All installations and services must be performed by qualified service personnel. G. CONNECTING THE EXHAUST VENT AND COMBUSTION AIR INTAKE Figure 6. shows the typical exhaust vent and combustion air intake connection for VMA furnace. Figure 6. (VMA*-75 SHOWN) NOTICE: The exhaust vent pipe must be supported every 4 feet. After making sure the length of the piping is correct glue all connections in place.
All installations and services must be performed by qualified service personnel. NOTICE: The air intake pipe must be supported every 4 feet. After making sure the length of the piping is correct, glue all connections in place except the connection to the burner box. If the combustion air piping is installed in a warm humid place, such as a laundry room or above a suspended ceiling, it must be insulated with a 1.0” foil faced insulation or its equivalent.
All installations and services must be performed by qualified service personnel. Figure 7: Proper Direct Vent Terminations (RH & LH views) and Vent Termination Only w/o Outside Combustion Air Intake (RH view) NOTICE: If exterior sidewall building materials are subject to degradation from contact with flue gases or moisture, a minimum 24-inch diameter shield shall be fabricated from stainless steel or UV-resistant plastic sheet.
All installations and services must be performed by qualified service personnel. Figure 8: Typical Relative Locations of Direct Vent Terminations When Sidewall Venting 3. Exhaust Vent Terminal Location Clearance Requirements a. The vent terminal shall be located at least 3-feet above any forced air inlet located within 10-feet. Refer to Figure 9 for a depiction of the minimum required clearances between vent terminations and building features according to the National Fuel Gas Code (NFGC). b.
All installations and services must be performed by qualified service personnel.
All installations and services must be performed by qualified service personnel. 4. Vent Terminal Location Guidelines : Bushes, shrubs, or any vegetation that may restrict the flow of flue products must be kept away from vent and air intake terminations. Terminations must also be kept clear of any leaves, weeds, combustible materials, snow, and ice build-up. Avoid locating the vent terminal over areas where dripping of condensate, or small pools of acidic condensate, could create a problem.
All installations and services must be performed by qualified service personnel. inlet as shown in Figure 10, making sure that the spacing between the inlet and outlet complies with that noted in Figure 8. Figure 10: Typical Construction Details of Sidewall Vent and Air Intake Terminations 3. Finish the vent installation by caulking the annulus to seal around the two (2) holes where the thermoplastic pipes pass through the wall. 4.
All installations and services must be performed by qualified service personnel. 3. 4. 5. 6. 7. 8. Place second flashing plate on roof over existing hole. Plate must be sealed to roof to ensure a weather proof seal. Secure plate to roof. Drop pvc pipes thru holes in flashing plates. Secure with hose clamps to flashing plate. Seal with silicone type caulk. The furnace may be vented vertically through the roof.
All installations and services must be performed by qualified service personnel. When the PVC vent and combustion air intake pipes pass through a ceiling, and a fire stop is required. Refer to the following: CEILING: Frame out area around where PVC pipe is to penetrate ceiling. Cut a 2-3/8” diameter hole for 2” PVC in the ceiling and a corresponding hole in a firestop to be made of a minimum of 18 gauge galvanized metal large enough to cover the entire framed area.
All installations and services must be performed by qualified service personnel. 3. An optional condensate pump (P/N V350225) is available. This pump will not fit into the vestibule of the furnace and must be installed below the furnace for operation. Instructions will be included with pump if this option is utilized. Figure 14. L. ELECTRICAL WIRING All wiring shall be performed by a qualified electrician or service person.
All installations and services must be performed by qualified service personnel. NOTE: Class 1 thermostat wire must be used inside the furnace burner compartment. a. Insert 24 VAC wires through the plastic grommet on the left side of the furnace casing. b. Connect the thermostat wires to the W/R 50A65-143 control (refer to the wiring diagram). c. Connect the thermostat wires to the room thermostat.
All installations and services must be performed by qualified service personnel. mounted junction box. The hot leg must pass through the disconnect switch in all cases to prevent the hazard of electrical shock when servicing. IMPORTANT: The furnace must be grounded in accordance with local codes and with the National Electrical Code, ANSI/NFPA NO. 70 (Latest Edition) when an external electrical source is utilized. 4. BLOWER MOTOR SPEED WIRING Figure 15.
All installations and services must be performed by qualified service personnel. VMA1-50 ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE COOLING UNIT HTG Speed 24,000 30,000 36,000 Speed Tap \ Static Pressure Low ML MH High Speed Tap \ Static Pressure Low ML MH High Speed Tap \ Static Pressure Low ML MH High Speed Tap \ Static Pressure Low ML MH High Recommended CLG Speed LOW LOW LOW MED-LOW MED-HIGH HIGH Furnace Airflow (CFM) vs. External Static pressure (in. WC.) 0.
All installations and services must be performed by qualified service personnel. VMA1-75 ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE COOLING UNIT HTG Speed 24,000 30,000 36,000 Speed Tap \ Static Pressure Low ML MH High Speed Tap \ Static Pressure Low ML MH High Speed Tap \ Static Pressure Low ML MH High Speed Tap \ Static Pressure Low ML MH High Recommended CLG Speed MED-LOW MED-LOW MED-LOW MED-LOW MED-HIGH HIGH Furnace Airflow (CFM) vs. External Static pressure (in. WC.) 0.
All installations and services must be performed by qualified service personnel. : TURN OFF THE ELECTRICAL POWER to the furnace before attempting to change blower speed wiring. The furnace is factory wired to the ignition control with standard heating and cooling speeds. When changing motor speeds, simply switch the needed speed to either the heating or cooling terminal as applicable on the module to obtain the desired CFM. The unused speeds should then be reconnected to the module in the “park” positions.
All installations and services must be performed by qualified service personnel. V. STARTING THE UNIT A.
All installations and services must be performed by qualified service personnel. MAIN BURNER OPERATION CALL FOR HEAT SATISFIED AFTER DELAY-TO-FAN-ON PERIOD ENDS, CIRCULATING AIR FAN IS ENERGIZED AT HEATING SPEED. THE (OPTIONAL) ELECTRONIC AIR CLEANER AND HUMIDIFIER ARE ENERGIZED. WHEN THERMOSTAT IS SATISFIED, CONTACTS OPEN AND THE GAS VALVE IS DE-ENERGIZED. AFTER PROOF OF FLAME LOSS, INDUCER STARTS 5 SECOND POST SURGE AND (OPTIONAL) HUMIDIFIER ARE DE-ENERGIZED.
All installations and services must be performed by qualified service personnel. B. INITIAL START UP: This furnace does not have a pilot. It is equipped with a hot surface igniter which automatically lights the burner. Do not attempt to light the burner by hand. Check the following items before the initial start-up. 1. Check all wiring for loose connections and proper hook up. 2. Leak test gas piping connections. 3.
All installations and services must be performed by qualified service personnel. C. ADJUSTMENT OF BTU INPUT RATE: The orifice for this furnace was sized: 1) for natural gas having a heating value of 1025 BTU per cubic foot and a specific gravity of .65, or 2) for liquefied propane gas with a heating value of 2500 BTU per cubic foot and a specific gravity of 1.55. The information plate inside the furnace vestibule will specify which gas your furnace is orificed for.
All installations and services must be performed by qualified service personnel. GAS PRESSURE CHART FOR VMA* MODEL FURNACES SUPPLY PRESSURE MANIFOLD PRESSURE NAT MAX 14” WC MIN 4.5” WC 3.5 + .3” WC PROPANE MAX 14” WC MIN 11” WC 10.0” + .3” WC TABLE 3 This gas furnace is equipped with a fixed orifice sized for the manifold pressure shown on the rating label. The input can only be increased, or decreased, by adjusting the manifold pressure.
All installations and services must be performed by qualified service personnel. flames should be clear, blue and almost transparent in color. (see Figure 16). NOTE: It is not unusual to have orangish flames visible in the tube for LP gas. Figure 16. : The VMA furnace models are direct vent design and do not require an air shutter adjustment (air shutters are not used) for proper flame characteristics.
All installations and services must be performed by qualified service personnel. control, with one of the higher speed blower leads attached to a terminal marked “Park”. Be sure to attach any unused blower leads to a terminal marked “Park”. Replace the blower door and turn on the power supply. F. FURNACE CHECKOUT PROCEDURE Before any system of gas piping is finally put into service, it shall be carefully tested to assure that it is gas tight as indicated in the Fuel Piping Section of this Furnace Manual.
All installations and services must be performed by qualified service personnel. VI. INSTALLER'S INSTRUCTIONS TO USER: After completing the installation, the installer shall inform and/or demonstrate to the homeowner: 1. The location of all the instructions in the furnace and that the instructions must be kept along with instructions for any accessories in the plastic pouch. 2. The location and use of the manual gas shut off valve and furnace electrical disconnect switch.
All installations and services must be performed by qualified service personnel. A. ELECTRICAL: 1. Check diagnostic code through view port prior to removing access door. 2. Check all wiring for loose connections and any signs of damage or unusual wear. 3. Check for correct voltage at the furnace when operating. 4. Check amp-draw on blower motor and inducer motor to assure they are not exceeding name plate amp rating. 5.
All installations and services must be performed by qualified service personnel. 5. GASKETS/SEALING MATERIALS Inspect all visible gaskets for signs of degradation or liquid seepage, especially any seals which were removed as part of the inspection. Replace any suspect gaskets. C. HEAT EXCHANGER Inspect for corrosion, pitting, warpage, deterioration, carbon build-up and loose gaskets in the flue pipe, burner box and accessible areas of the heat exchanger. 1. CLEANING THE COIL AIR SIDE a.
All installations and services must be performed by qualified service personnel. FILTER MAINTENANCE PROCEDURE The filter is located inside front door of the VMA. Remove filter retaining rod and remove dirty filter. Clean the filter by vacuuming, rinsing with tap water, hosing or dipping in an ordinary detergent solution. After cleaning, replace the completely dry filter and retain with retaining rod. If the filter has a mesh, the mesh side of the filter must be towards the furnace.
All installations and services must be performed by qualified service personnel. 3 flashes, then pause 4 flashes, then pause 6 flashes, then pause 7 flashes, then pause 8 flashes, then pause pressure switch stuck open open high limit switch 115 volt AC power reversed low flame sense signal check ignitor or improper grounding Continuous flashing Flame has been sensed when (no pause) no flame should be present (no call for heat) The LED will also flash once at power-up.
All installations and services must be performed by qualified service personnel. TROUBLESHOOTING GUIDE THE SYSTEM IS STARTED BY SETTING THE THERMOSTAT TO CALL FOR HEAT. THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF MALFUNCTION OR DEVIATION FROM THE NORMAL OPERATION. TO USE THIS DIAGRAM, YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES. NOTE: CHECK DIAGNOSTIC CODE THROUGH VIEW PORT PRIOR TO REMOVING ACCESS DOOR.
All installations and services must be performed by qualified service personnel. Yes Yes No IS THERE LINE VOLTAGE ACROSS INDUCER POWER TERMINALS "IND" & "IND N" AT THE INTEGRATED CONTROL? Yes CHECK THE INTEGRATED CONTROL DIAGNOSTIC LED LAMP. RESET BY INTERRUPTING POWER TO CONTROL FOR MORE THAN ONE SECOND. IF LED STAYS ON CONTINUOUSLY, REPLACE INTEGRATED CONTROL. CHECK WIRING TO INDUCER AND IF OK, REPLACE INDUCER ASSEMBLY.
All installations and services must be performed by qualified service personnel. Yes AFTER GAS VALVE OPENS, DO THE BURNERS IGNITE? No CHECK FOR PROPER MANIFOLD PRESSURE. ADJUST TO 3.5" FOR NATURAL GAS OR 10.0" WC FOR LP GAS Yes Yes IS IGNITOR POSITIONED CORRECTLY? No REPOSITION TO CORRECT LOCATION. DO BURNERS STAY LIT PAST PROOF OF FLAME CHECK? Yes DOES THE INTEGRATED CONTROL ENERGIZE THE CIRCULATING AIR BLOWER AFTER THE 45 SECOND TIME DELAY.
All installations and services must be performed by qualified service personnel. Yes DOES SYSTEM RUN UNTIL THERMOSTAT IS SATISFIED? No IS LED LIGHT ON INTEGRATED CONTROL FLASHING? No CHECK ALL WIRING FOR LOOSE CONNECTIONS. Yes Yes DOES BURNER SHUT OFF WHEN THERMOSTAT IS SATISFIED? No CHECK FOR SHORT IN WIRE TO THERMOSTAT AND CORRECT IF NECESSARY.
All installations and services must be performed by qualified service personnel.
All installations and services must be performed by qualified service personnel.
All installations and services must be performed by qualified service personnel.
All installations and services must be performed by qualified service personnel.
All installations and services must be performed by qualified service personnel.
