Installation & Operating Manual The Harman Built Serenity III HB 38 DV “Ce manuel est disponible en Français sur demande” SAFETY NOTICE PLEASE READ THIS ENTIRE MANUAL BEFORE YOU INSTALL AND USE YOUR NEW ROOM HEATER. FAILURE TO FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY, OR EVEN DEATH.
Page 2
W ARNING: 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. FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Victorian Face Venting Damper Settings Changing to LP Log Placement Option Installation Thermostat Remote Control Remote Register Kit Maintainence Wiring Diagram Trouble Shooting Warranty Manufactured by The Harman Stove Company 352 Mountain House Rd. Halifax PA 17032 M :PM 65-FILES\M ANUALS\HBF\hb38dvR6.p65...
The Harman Serenity III Direct Vent Gas Fire- place is a listed gas-fired direct vent room fireplace tested by Intertek Testing Services/Warnock Hersey to ANSI Z21.88-2002/ CSA2.33-M02. CAN-CGA-2.17- M91. The installation of the Serenity III Direct Vent Gas Fireplace must conform with local codes, or in the ab- sence of local codes, with National Fuel Gas Code, ANSI Z223.1 —...
Page 5
IMPORTANT FEATURE 200% To 300% More Air Air Gate Blower System Typically in gas fireplaces the blower (which is usually an option) is placed to blow air up the back of the firebox without any method to keep the air pressure from being lost. This method allows air to flow freely around the blower when the blower is off but gives up a large percentage of the blowers efficiency when it is on.
OPERATION High-Low Gas Control ON-OFF/ THERMOSTAT Switch Three Speed Rear Burner Blower Switch ON/OFF Switch Piezo Ignitor Button PILOT Operation HOW TO LIGHT THE FIRE 1. STOP! Read the safety information on the front cover. 2. If using the optional thermostat, set thermostat to the lowest setting.
Page 7
Bottom rear view of burner module. Rear Burner Front Burner Adjuster Adjuster Normal Flame pattern. Note: Flames will vary in height and position depending on the placement and the amount of ember wool. OPERATION room temperature. 15. Set the High-Low Regulator to desired setting: Turn fully counterclockwise for High and fully clockwise for Low.
Electrical Box RATINGS Input Rating (Btu/hr)(0-4500 ft.)(0-1375 m) Min. Input Rating (Btu/hr)(0-4500 ft.)(0-1375 m) Orifices (DMS)(front/rear)(0-4500 ft.)(0-1375 m) Manifold Pressure (in w.c./kPa) Min. Manifold Pressure (in w.c./kPa) Min. Inlet Pressure (in w.c./kPa) Max. Output (Btu/hr)(0-4500 ft.)(0-1375 m) (Blower Off) Max. Efficiency (Blower On) top vent 84.5%, rear vent 75% SPECIFICATIONS Top Standoffs Vent Collar...
Page 9
MINIMUM CLEARANCES FROM COMBUSTIBLE CONSTRUCTION Unit to floor 0 in. Face to side wall 7 in. Unit to top stand-offs 0 in. Unit to side stand-offs 0 in. Unit to rear stand-offs 0 in. Top of Glass to 7” Mantel 26in.
Only For Qualified Installers Shown is the M2 Mantel Cabinet with marble finish facing, raised marble finish hearth and a gold plated Arch face with Arch hood. Typical Tile Facing Sectional View INSTALLATION Installation Options This section deals with basic installation of and Arch face and a Victorian face.
Page 13
Only For Qualified Installers Placement Here are some of the things that will effect the exact placement of the fireplace. 1. Top or rear flue 2. Arch face or mantle face. Arch face - Must decide on mantel and front facing material.
Page 14
Only For Qualified Installers Installing fireplace in a wall with an arch face, ceramic tile facing, and a face mantel. Noncombustible Noncombustible material such as Dura-rock must be used as facing on the front of the fireplace cabinet. Ceramic tile, marble or other decorative noncombustible material may be used in front of the Dura-rock.
Only For Qualified Installers Latch Handles Face Hooks Slots for face latches Slots for face hooks INSTALLATION Installing The Arch Face To install the arch face, place the hooks on the bottom rear of the face into the hook slots on the fireplace.
Only For Qualified Installers INSTALLATION Assembling the Victorian Face 1. Position the mantel face down on the floor. 2. Place the left piller over the two studs on the left side of the mantel. Install two washers and nuts and tighten. 3.
Only For Qualified Installers Drywall Bracket Nails Drywall Bracket Standoff INSTALLATION Installing Fireplace To use Victorian Face Nails When installing the fireplace to use the Victo- rian Face the unit must be positioned back 1/2 inch farther than with an arch face. A special drywall bracket must be used to allow the drywall to extend down far enough so the face will cover the drywall.
Page 18
Only For Qualified Installers Mounting Holes INSTALLATION Mounting The Victorian Face 1. Place fiberglass rope in sealing angle with angle mounting bolts loose. 2. Place the face on the fireplace starting at the bottom. 3. Slide the face into place and install the four bolts as shown at left.
Page 19
Only For Qualified Installers Burn Only the Fuel for which the Heater is Equipped The Serenity III Direct Vent will burn either natural gas or propane, but requires a change over kit for propane. The label on the burner system mod- ule indicates the fuel for which it is equipped.
Only For Qualified Installers Use Only Approved Venting This appliance has been tested and is listed for installation with Simpson Duravent GS venting com- ponents. The Simpson Duravent GS warranty will be voided, and serious fire, health, or other safety hazards may result from any of the following actions: •...
Page 21
Only For Qualified Installers This appliance must not be connected to a chimney flue serving a separate solid fuel burning appliance. VENTING Venting with 8” x 5” Pipe Maximum of four 45 elbows allowed. Subtract three feet of total horizontal pipe length for each of the 3rd and 4th 45 used.
Page 22
Only For Qualified Installers Use Adaptor (Part No. 1222D ) to reduce to 6 VENTING ” x 4” Pipe Venting with 6 Maximum of four 45 elbows allowed. Subtract three feet of total horizontal pipe length for the 3rd and 4th 45 Maximum of two 90 elbows allowed.
Page 23
Only For Qualified Installers Requirements for Terminating the Venting WARNING: Venting terminals must not be recessed into a wall or siding. In addition, the following must be observed: A. The clearance above grade, or a veranda, porch, deck or balcony must be a minimum of 12" (30 cm).
Only For Qualified Installers Maximum Draft Minimum Draft A vent damper is provided on top vent models to allow fine tuning of the draft. Too little draft will cause flames to be too long with black tips and too much draft will cause flames to be short and blue. To adjust the damper, burn the unit on high with both burners for 10 minutes or more.
Only For Qualified Installers Remove Orifice Cover Remove Rear Burner by Remove Screw sliding to the left. Remove Flame Bridge INSTALLATION Changing to LP Remove screw Remove Air Deflector Lift up on front of burner/grate/ screen assembly and then slide left about 1/2”.
Page 26
Only For Qualified Installers Remove Orifices with a 1/2” wrench or deep well socket. The larger orifice always goes to the front. Replace Orifices with the proper size shown in the Orifice Chart. Remove two screws and place Control Panel to the left. INSTALLATION Vent Rear...
Only For Qualified Installers Rear Log Side Log Top Log Locate two holes in bottom of rear log. Place the rear log down over the two pins to locate the log. Place the side log as shown with the notch in the log behind the angled grate bar.
Only For Qualified Installers Thermostat Front Burner Button Rear Burner Button INSTALLATION (Options) Connecting the Optional Thermostat If the optional thermostat is used, it must be plugged into the terminal strip located in the lower left front corner of the heater. When installing a millivolt control system, use only a special low resistance thermostat.
Only For Qualified Installers Optional Remote Register Kit Register Kit Includes remote register box with blower, speed control, two 8 foot sec- tions of 6” flex pipe, 6” round to 3” x 10” transition, and automatic damper assembly. Floor Register Floor Kit Includes floor register and floor mounting bracket for blower box.
Page 30
Only For Qualified Installers INSTALLATION (Options) Optional Wall Register Kit The Serenity is designed for use with one or two register kits. Each kit can have twenty feet of duct between the fireplace and the register box. The registers can be mounted one floor above or below the fireplace.
Page 31
Only For Qualified Installers Wall Mounting Brackets Install wall mounting brackets to side of blower box with three screws. Blower Box Blower Assembly Box Cover Register Install blower box between wall studs as shown. Run 3” x 10” duct to blower box and secure. Do not use the wall cavity as a duct.
Page 32
Only For Qualified Installers Speed Control Access Door Blower Cover Blower Assembly INSTALLATION (Options) Floor Register Installation The difference between the wall register and floor register is the register itself and the mounting brackets. The wall register mounts on the wall with two screws.
Page 33
Only For Qualified Installers Breakoff Tabs Tilt Blower Box Mounting Screws INSTALLATION (Options) Installing the Floor Register The blower box mounting bracket is designed to allow mounting into an existing floor. However, it is easier to in- stall all components at the time of house construction.
Page 34
Only For Qualified Installers Blower Assembly Ready to Install. Blower Assembly Installed. Speed Control Knob INSTALLATION (Options) 6. Place the blower assembly into the blower box. You may need to tilt the assembly to get it through the opening in the blower box. Make sure the wires do not get pinched.
A qualified service person recommended by your Harman dealer should conduct an annual in- spection and maintenance of your fireplace, its vent- ing, and the installation to keep it running safely and efficiently. The following procedures should be per- formed only by a qualified service person. The gas supply should be turned off whenever a maintenance procedure is performed.
Page 36
Air Out Air In The flow of combustion and ventilation air must not be obstructed MAINTENANCE Air Flow It is essential the air flows freely into the bot- tom grill and out of the top grill. Do not place ob- jects in front of the grills.
TROUBLE SHOOTING Only For Qualified Installers Natural Gas Manifold Pressure Inlet Pressure 3.5 inches 5 to 7 inches Pilot Adjuster Propane Manifold Pressure Inlet Pressure 11 10 inches to 13 inches Pilot Adjuster...
Page 42
Only For Qualified Installers Look through hole in end of log to see if a spark jumps from the ignitor electrode to the pilot when the ignitor button is pushed. Is gas turned "on"? Is there gas in tank (LP) or line (NG) Purge gas line to stove Check pilot orfice and pilot line for blockage.
Page 43
Only For Qualified Installers Check inlet pressure Good Check size of pilot flames Good Check Milivolt output of thermocouple. Should be 10 or more MV. Good Replace Valve TROUBLE SHOOTING Pilot does not stay lit Correct inlet pressure Adjust pilot adjustment to achieve proper flame.
Page 44
Only For Qualified Installers Is Pilot lit Check Thermopile voltage at terminals marked TP on valve. too low Should be approximately 200 mv with switch "on" and approximately 400 mv with switch "off". Check switch, wires, and wiring connectors. Replace valve TROUBLE SHOOTING Main Burner will not light (with valve...
Page 45
Only For Qualified Installers Do you hear a click sound when you move the rear burner switch back and forth from “off” to “on”. Check batteries Good Check wire connections Good Check rear burner switch Good Replace solinoid TROUBLE SHOOTING Rear burner does not light Check rear orifice for blockage...
L IFE TIM E Harman Built Fireplaces warrants its products to be free from defects in material or workmanship, in normal use and service, for a period of 6 years from the date of sales invoice and for mechanical and electrical failures, in normal use and service, for a period of 3 years from the date of sales invoice.