INSTALLER/CONSUMER SAFETY INFORMATION PLEASE READ THIS MANUAL BEFORE INSTALLING AND USING APPLIANCE WARNING! If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. Oxford Direct Vent / Natural Vent Gas Heater Models: OXDV30NV FOR YOUR SAFETY Installation and service must be performed by a qualified installer, service agency or the gas supplier. WHAT TO DO IF YOU SMELL GAS: • Do not try to light any appliance.
Oxford Direct Vent / Natural Vent Gas Heater Table of Contents PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE. Thank you and congratulations on your purchase of an MHSC stove. IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fire hazard and will void the warranty. Installation & Operating Instructions General Information........................................................
Oxford Direct Vent / Natural Vent Gas Heater General Information The Oxford Direct Vent/Natural Vent Room Heater, Model No. OXDV30NV, is a vented gas appliance listed to the ANSI standard Z21.88-2009 and CSA-2.33-2009 for Vented Room Heaters, and CSA 2.17-M91, Gas-Fired Appliances For Use at High Altitudes. The installation of the Oxford Direct Vent/Natural Vent Room Heater must conform with local codes, or in the absence of local codes, with National Fuel Gas Code, ANSI Z223.
Oxford Direct Vent / Natural Vent Gas Heater Installation Requirements Requirements for the Commonwealth of Massachusetts All gas fitting and installation of this heater shall only be done by a licensed gas fitter or licensed plumber.
Oxford Direct Vent / Natural Vent Gas Heater Oxford Direct Vent / Natural Vent Dimensions Refer to Page 6 for Flue Collar Centerline Dimensions 6 6M" (172mm) CL Valve Inlet 2456O" (622mm) 28 6 " (721mm) C Valve 4 6 " L Inlet (111mm) 1256O" (318mm) 23" (584mm) 17" (419mm) Fig. 1 Oxford dimensions. 5123 Oxford dims Attention The Oxford stove is shipped from the factory as a Direct Vent Gas Heater. This heater may be converted into a Natural Vent unit in the field.
Oxford Direct Vent / Natural Vent Gas Heater Installation Requirements The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest edition. (EXCEPTION: Do not derate this appliance for altitude. Maintain the manifold pressure at 3.5” w.c. for Natural Gas, and 10” w.c. for Propane). In Canada, installation must be in accordance with the current CSA B-149.1 Installation Codes and/or local codes.
Oxford Direct Vent / Natural Vent Gas Heater Parallel Installation: Minimum Clearance and Flue Centerline, Direct Vent and Natural Vent Wall Centerline from Floor C L C A D A C L B Stove Clearances Pipe Centerlines A: 4” (102 mm) B: 4” (102 mm) C: 15Z\x” (395 mm) D: 9” (229 mm) ST128b ST1121 ST128c Fig. 3 Parallel installation, minimum back and side clearStardance ances and flue centerlines.
Oxford Direct Vent / Natural Vent Gas Heater Horizontal Termination Direct Vent ONLY Gas Specifications Model Fuel Gas Control 2465 Nat Millivolt 2466 Prop Millivolt Max. Input BTU/h 28,000 28,000 Min. Input BTU/h 20,000 19,000 Weight: Fully assembled; 202 lbs. Gas Inlet and Manifold Pressures Inlet Minimum Inlet Maximum Manifold Pressure Natural 5.5” w.c. 14.0” w.c. 3.5” w.c. LP (Propane) 11.0” w.c. 14.0” w.c. 10.0” w.c.
Oxford Direct Vent / Natural Vent Gas Heater Vent Termination Clearances Vertical Termination - Direct Vent ONLY A vertical vent system must terminate no less than 8’ (2.44 m) and no more than 40’ (12 m) above the appliance flue collar. A 2Z\v” restrictor plate (supplied) must be used where specified in all vertically terminated vent systems. (Fig. 8) NOTE: The restrictor plate supplied with the vertical termination should be discarded. Install restrictor plate supplied with stove directly at stove outlet.
Oxford Direct Vent / Natural Vent Gas Heater Venting Termination Clearances Your stove is approved to be vented either through the side wall, or vertical through the roof. • • • • • 10 This unit does not require any opening for inspection of vent pipe. Only MHSC and Simpson DuraVent venting components specifically approved and labelled for this stove may be used. Minimum clearances between vent pipes and combustible materials is one (1”) inch (25 mm), except where stated otherwise.
Oxford Direct Vent / Natural Vent Gas Heater General Venting Information - Termination Location INSIDE CORNER DETAIL G V H A N N D L V E C B B V F Ýi` Ãi` Ope ra B V Operable ble V B CFM145a V VENT TERMINATION B V V Fixed Closed B J X X AIR SUPPLY INLET M I A V K X AREA WHERE TERMINAL IS NOT PERMITTED Canadian Installations1 US Installations2 A = Clearance above grade, veranda, porch, 12” (30cm) 12” (30cm) CFM145a DV Termin Location deck, or balcony 5/01/01
Oxford Direct Vent / Natural Vent Gas Heater Termination Clearances Termination clearances for buildings with combustible and noncombustible exteriors. Alcove Applications* Inside Corner Outside Corner G= Combustible 6" (152 mm) G F= Combustible 6" (152 mm) Noncombustible 2" (51 mm) V Noncombustible 2" (51 mm) V C V E O F Balcony with perpendicular side wall Balcony with no side wall D C E = Min. 6” (152 mm) for non-vinyl sidewalls Min. 12” (305 mm) for vinyl sidewalls O = 8’ (2.4 m) Min.
Oxford Direct Vent / Natural Vent Gas Heater Venting Requirements and Options Direct Vent ONLY Approved Vent System Components The heater must be vented to the outdoors through an adjacent exterior wall or through the roof. The venting system must be comprised of the appropriate listed venting components specified on this page. These parts are available from DuraVent Corporation or your MHSC Dealer. Refer to Figure 4 for dimensions relevant to the standard minimum-vent kits.
Oxford Direct Vent / Natural Vent Gas Heater • Remove retaining nut from shaft of rheostat. (if Install the Optional Fan If you are installing the optional convection Fan Kit #2767 (FK26), continue here. If you are not installing a Fan Kit, go to Page 15, Venting System Assembly. 1. The fan kit includes a Blower Assembly and a Rheostat Assembly, connected by a cable. (Fig. 12) The Blower Assembly mounts to the bottom rear of the stove, and the Rheostat mounts to the valve coverplate.
Oxford Direct Vent / Natural Vent Gas Heater Venting System Assembly - Direct Vent General Information The Oxford is approved for installation only with the vent components listed on Page 13. Follow the vent component instructions exactly. For U.S. installations: The venting system must conform with local codes and/or the current National Fuel Gas Code, ANSI Z223.1/NFPA 54. 5. Install the Outer Adapter Pipe. Apply a 1/4” bead of cement around the inside wall of the pipe, about 1” from the end.
Oxford Direct Vent / Natural Vent Gas Heater Install the Vent Adapter Pipe Side Wall Termination Assembly (Simpson Dura-Vent Components) 1. Install the Restrictor Plate. Consult Page 9 to determine whether the restrictor plate is needed. If so, place the restrictor plate into the inner flue collar. (Fig. 16) 2. Discard the inner starter pipe shipped with the logset. Using the starter pipe assembly listed on Page 7, slide the inner section out to allow access.
Oxford Direct Vent / Natural Vent Gas Heater For DuraVent pipe only: Install vent pipe by aligning the locking system together, sliding the pipes together and twisting clockwise. • Install 90° elbow. Twist lock as before. • Slide the wall plate over horizontal run before attaching the horizontal run to the elbow. Fasten wall plate to wall. 4.
Oxford Direct Vent / Natural Vent Gas Heater Vent Termination Below Grade Recessed Wall Install Snorkel Kit #7FSDVSKS when it is not possible to meet the required vent termination clearances of 12” (305 mm) above grade level. The snorkel kit will allow installation depth of down to 7” (178 mm) below grade level. The seven inches is measured from the center of the horizontal vent pipe as it penetrates the wall.
Oxford Direct Vent / Natural Vent Gas Heater 8. Install appropriate pipe sections until the vent run reaches above the flashing. The enlarged ends of the vent sections always face downward. 9. Install the storm collar and seal around the joints. (Fig. 31) 10. Add additional vent lengths to achieve the proper overall height. 11. Apply cement to the inner and outer termination collars and install the terminal cap.
Oxford Direct Vent / Natural Vent Gas Heater Attach the first section of venting to the draft hood. Depending on the length of the individual venting sections and the lengths of the decorative pipe (if installed), you may need to slip the decorative pipe over the venting sections before attaching upper sections to lower ones. The sections of decorative pipe should be oriented with their seams (if any) toward the wall; sections usually do not need to be fastened at each joint, other than slip sections.
Oxford Direct Vent / Natural Vent Gas Heater In the U.S.; Gas connection should be made in accordance with current National Fuel Gas Code, ANSI Z223.1/NFPA 54. Since some municipalities have additional local codes, be sure to consult your local authority. In Canada; consult the local authority and CSA-B149.1 installation code. Always check for gas leaks with a mild soap and water solution. Do not use an open flame for leak testing.
Oxford Direct Vent / Natural Vent Gas Heater 8. The air shutter is located on the bottom of the burner to the left. (Fig. 37) Unfasten the two nuts holding the shutter in place. The shutter may be adjusted between the factory adjusted 1/2” to fully open. Reassemble the shutter to allow the rear injector air inlet to close from the minimum 1/2” opening to fully open. (Fig. 39) You may have to try more than once to find the correct air shutter opening for best results depending on your altitude.
Oxford Direct Vent / Natural Vent Gas Heater Thermostat Connection (optional) Use only a thermostat rated for 500 millivolts. Check the table below for the appropriate gauge thermostat wire to use for the length of lead required in your installation. Thermostat Wire / Gauge 18 16 14 3/8” Locking Nut Maximum Run 20 feet 20 - 40 feet up to 60 feet 1. Install the wall thermostat in the desired location and run the wires to the stove location. Terminate these leads with 1/4” female connectors. 2.
Oxford Direct Vent / Natural Vent Gas Heater Operation Flame & Temperature Adjustment Read these instructions carefully and familiarize yourself with the burner controls. Locate the pilot assembly, Figure 45. Follow the lighting instructions on Page 25 exactly. For stoves equipped with HI/LO valves, flame adjustment is accomplished by rotating the HI/LO adjustment knob located near the center of the gas control valve. (Fig.
Oxford Direct Vent / Natural Vent Gas Heater Lighting and Operating Instructions FOR YOUR SAFETY READ BEFORE LIGHTING WARNING:If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This heater has a pilot which must be lit manually. When lighting the pilot follow these instructions exactly. B. BEFORE LIGHTING smell all around the heater area for gas.
Oxford Direct Vent / Natural Vent Gas Heater Troubleshooting the Gas Control System SIT NOVA 820 MILLIVOLT VALVE NOTE: Before trouble shooting the gas control system, be sure external gas shut off is in the “On” position. Symptom Possible Causes Corrective Action 1. Spark ignitor will not light A. Defective or misaligned electrode at pilot Using a match, light pilot. If pilot lights, turn off pilot and push the red button again.
Oxford Direct Vent / Natural Vent Gas Heater Fuel Conversion Instructions PIL OT O H PILOT ADJ ON I L ST770 Gas Supply Inlet Main Gas Line Fig. 48 Attach the gas line to the left side of the valve. Conversion Precautions Before proceeding, turnST770 control knob on valve to OFF and turn gas supply OFF. Turn OFF any electricity that DW may be going to the appliance. attach gas line 5/15/03 djt Conversion Procedure Left & Right Log Bracket Assembly ST768 Fig.
Oxford Direct Vent / Natural Vent Gas Heater E Pilot type 2 • Loosen pilot hood turning counterclockwise using a 7/16” wrench. (Fig. 54) NOTE: You may use penetrating oil to prevent pilot hood threads from seizing up. • Remove pilot orifice with needlenose pliers. (Fig. 55) NOTE: Use a wrench to hold pilot tube in place while removing the orifice. • Install the conversion orifice. • Reinstall pilot hood and tighten until mark on pilot hood aligns with mark on pilot bracket.
Oxford Direct Vent / Natural Vent Gas Heater 25.Replace logs. 26.Replace glass and stove front. Conversion is complete. Left Burner Leg Injector Shoulder 90¡ ST353 Fig. 56 Be sure to maintain 90° angle at left burner leg. ST353 air shutter adjust burner replace 3/20/00 djt Table 2. Injector Orifice Size Matrix Kit # 30005155 Conversion to Natural Gas Front Part # Rear Part # #54 / .055” 30000514 #44 / .
Oxford Direct Vent / Natural Vent Gas Heater Maintenance Your Gas Heater will provide years of service with minimal upkeep. The following procedures will help ensure that your stove continues to function properly. Annual System Inspection Have the entire heater and venting system inspected annually by a qualified gas technician. Replace any worn or broken parts. CAUTION TURN THE PILOT OFF BEFORE PAINTING. ALLOW THE HEATER TO COOL COMPLETELY BEFORE PAINTING.
Oxford Direct Vent / Natural Vent Gas Heater Inspect the Vent System Annually ST208 Have the vent system inspected annually by a qualified technician. Shut off the main gas supply before inspecting the system. Both the inner exhaust pipe and the outer combustion supply pipe must be checked to confirm that they are unblocked and in good condition. Fig. 58 Release the latches to release the glass frame.
Oxford Direct Vent / Natural Vent Gas Heater Wiring Diagrams OFF On/Off Switch Wiring FAN POWER CORD ON BLK Thermopile Black WHT BL TP/TH Millivolt Gas Valve TP Chassis Ground GRN BL Black TH K K BLK ST124b Thermostat TP/TH TP TH FAN JUNCTION BOX Thermostat (Optional) Strain Relief Thermopile Black Optional Thermostat (Optional) Wiring St124b on/off/switch wiring 1/11/00Blackdjt ON / OFF Rheostat Millivolt Gas Valve ST124c Snapstat Fig.
Oxford Direct Vent / Natural Vent Gas Heater 2 1 7 3 6 4 1a 1c 5 1b 12 10 16 21 13 8 17 14 9 11 18 22 15a,b, c,d 23 19 20 25 27 24 28 26 31 29 32 33 36a,b 30 35 NT E EM C 34 37 MHSC reserves the right to make changes in design, materials, specifications, prices and discontinue colors and products at any time, without notice. 5123 Oxford parts Oxford Direct Vent / Natural Vent Gas Heater Models OXDV30NV Ref. 1. 1a. 1b. 1c. 2. 3. 4. 5. 6. 7. 8. 9.
Oxford Direct Vent / Natural Vent Gas Heater Oxford Direct Vent / Natural Vent Gas Heater Models OXDV30NV (continued) Ref. 10. 11. 12. 13. 14. 15a. 15b. 15c. 15d. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36a. 36b. 37. 38. 39. Description Glass, DV25 Glass Frame Assembly - SDV30 Gasket, Glass - Med. Knit - RDV40 Pilot Top Convertible Pilot Assembly 3Way N/DV RN 0.199.706 Pilot Assembly 3Way N/DV RP 0.199.
Oxford Direct Vent / Natural Vent Gas Heater Optional Accessories Fan Kits FK26 Fan The FK26 fan helps distribute heated air from within the firebox out into the room. The fan is controlled by a snapstat that turns power on and off as the firebox temperature rises above and falls below a preset temperature. A rheostat provides for variable fan speeds. Specifications Remote Controls The remote control allows you to turn the heater on or off from anywhere in the room. Refer to Page 32 for wiring diagrams.
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Oxford Direct Vent / Natural Vent Gas Heater LIMITED LIFETIME WARRANTY PRODUCT COVERED BY THIS WARRANTY All MHSC gas stoves equipped with an Insta-Flame Ceramic Burner. BASIC WARRANTY MHSC (hereinafter referred to collectively as the Company) warrants that your new MHSC Gas Fireplace/Stove is free from manufacturing and material defects for a period of one year from the date of purchase, subject to the following conditions and limitations.
Efficiency Ratings Model OXDV30NV OXDV30PV EnerGuide Ratings Fireplace Efficiency (%) 63.0 63.0 MHSC 149 Cleveland Drive • Paris, Kentucky 40361 www.mhsc.