DIRECT-VENT FIREPLACE OWNER’S OPERATION AND INSTALLATION MANUAL Patent Pending NATURAL GAS Models (V)KC42N Series PROPANE/LP GAS ModelS (V)KC42P Series 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. — 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 Safety Information................................................ 2 Product Identification............................................ 4 Local Codes......................................................... 4 Product Features.................................................. 5 Pre-Installation Preparation.................................. 5 Location of Termination Cap................................. 8 Venting Installation Instructions............................ 9 Fireplace Installation..
Safety information Continued This fireplace must be installed by a qualified (certified or licensed) service person. It has a sealed gas combustion chamber that uses a coaxial pipe (pipe within a pipe and having the same center) venting system. It brings in fresh air for combustion through the outer pipe and combustion gases are exhausted through the inner pipe. If the glass door assembly and venting pipe are not properly seated, connected and sealed, carbon monoxide leakage (spillage) can occur.
Safety information Product Identification Continued 2. If you smell gas • shut off gas supply • do not try to light any appliance • do not touch any electrical switch; do not use any phone in your building • immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier's instructions • if you cannot reach you gas supplier, call the fire department. 3.
Product Features These are a few facts that can help you understand and enjoy your direct-vent fireplace: • The venting system may be routed to the outside of your home in several ways. It may vent through the roof (vertical) or it may vent to an outside/exterior wall (horizontal). The vent pipe installation is very important to allow for proper operation. You must follow the venting instructions very carefully for either vertical or horizontal applications.
Pre-Installation Preparation Continued • When locating termination cap, it is important to observe the minimum clearances shown in Figure 7, page 8. • If recessing into a wall, you can avoid extra framing by positioning your fireplace against an already existing framing member. • Do not recess termination cap into a wall or siding. • You may paint the termination cap with 450º F (232º C) heat-resistant paint to coordinate with the exterior finish.
Pre-Installation Preparation 1 2 Continued 3 A 4 B D 1/2" 13 B 5/8" 21 41A5/8" 1 58 C /2" 5 C D 6 E 7 F E F 48" 1 G /4" 48 81 / " H1 2 G Top of Louver Opening 16 / " 3 4 Wall Nailing Nailing Tabs Tabs Figure 5 - Framing Clearances for Corner Installation Ref. Mantel Depth Ref. Mantel from Top of Louver Opening 1 14" A 16" 2 12" B 14" 3 10" C 12" 4 8" D 10" 5 6" E 8" 6 4" F 6" 7 2" G 4" Figure 6 - Clearances for Combustible Mantels 116239-01F www.
Location of Termination Cap N N D H V L E B C Fixed Closed F B Openable Fixed Closed V Openable V I V G B V B B J V G X G M A V K X V A V TERMINATION CAP X AIR SUPPLY INLET G GAS METER RESTRICTED AREA (TERMINATION PROHIBITED) A = clearance above grade, veranda, porch, deck, or I = clearance to service regulator vent outlet [*72" (182.9 cm) balcony [*12" (30.
Venting Installation Instructions NOTICE: Read these instructions completely before attempting installation. These models are tested and approved for use with DESA (direct-vent) pipe components and terminations. The venting system must terminate on the outside of the structure and can not be attached to a chimney or flue system serving a separate solid fuel or gas burning appliance. A direct-vent appliance must have its own venting system. DO NOT common vent this appliance.
Venting Installation instructions Continued INSTALLATION PLANNING There are two basic types of direct-vent installation: • Horizontal Termination • Vertical Termination Horizontal Termination Installation IMPORTANT: Horizontal square terminations require only inner portion of wall firestop. Horizontal installations using round termination require exterior portion of wall firestop (see Figure 14, page 12). 1.
Venting Installation instructions Apply Mastic to All Four Sides Continued Vent Cap WARNING: Do not recess vent termination into any wall. This will cause a fire hazard. 6. Noncombustible Exterior Wall: Position the horizontal vent cap in the center of the 8 1/2" round hole and attach to the exterior wall with four wood screws provided.
Venting Installation instructions Continued Minimum Pipe Overlap 11/4" Direct-Vent Pipe Siding Standoff Screws Wall Firestop Maintain 1" Minimum Air Space Around Outer Pipe When Penetrating a Wall GROUND FLOOR INSTALLATION Recommended Applications: • Installation using cabinet surrounds • Through the wall using round or square termination (up to 12" horizontal pipe) • NOT FOR CORNER INSTALLATION Adjustable Horizontal Pipe 12" Max.
Venting Installation instructions Continued CORNER INSTALLATION Recommended Applications: • Corner ground floor installation • Ground floor installation where pipe vents horizontally through wall (over 12" horizontal pipe) • Basement installation where one foot clearance from ground to termination is possible Not to Exceed (H) Limits 90° Elbow Square Termination Not to Exceed (H) Limits 90° Elbow Wall Firestop As Required for (V), See Chart for Pipe Section Required 12" Min.
Venting Installation instructions Continued HORIZONTAL SYSTEM INSTALLATION USING TWO 90° ELBOWS The following configurations show the minimum vertical rise requirements for a horizontal system using two 90° elbows. 45° Elbow Venting with Two 90° Elbows Horizontal (H1) + Vertical (V) Horizontal (H1) Horizontal (H2) 5' min. 6' min. 7' min. 8' min. 20' max. 2' max. 4' max. 6' max. 8' max. 8' max. 6' max. 12' max. 18' max. 20' max. 20' max.
Venting Installation instructions Continued installation for vertical termination Note: Vertical restrictor must be installed in all vertical installations. 1. Determine the route your vertical venting will take. If ceiling joists, roof rafters or other framing will obstruct the venting system, consider an offset (see Figure 19) to avoid cutting load bearing members.
Venting Installation instructions Continued 5. Place the flashing over the pipe section(s) extending through the roof. Secure the base of the flashing to the roof and framing with roofing nails. Be sure roofing material overlaps the top edge of the flashing as shown in Figure 19, page 15. There must be a 1" clearance from the vent pipe to combustible materials. 6. Continue to add pipe sections until the height of the vent cap meets the minimum building code requirements described in Figure 7 on page 8.
Venting Installation instructions Continued Vertical Venting V = 40' max. Note: Install restrictor into inner collar of fireplace as shown. Note: Install restrictor into inner collar of fireplace as shown. 45° Elbow 45° Elbow Venting with Two 90° Elbows Vertical (V1) Horizontal (H) 5' min. 6' min. 7' min. 8' min. 6' max. 12' max. 18' max. 20' max. Note: Vertical (V1) + Vertical (V2) = 40' max.
Venting Installation instructions Number VKR-58 Continued 45° Starter Elbow VKC-58 12" Extension HHTK-58 Figure 25 - Recommended 12" Extension for High Altitude Installation parts list for venting kits and components DESA (5"/8") Pipe & Vent Kits Number Description P58-6 6" Section Double Wall Pipe, Galvanized P58-12 12" Section Double Wall Pipe, Galvanized P58-24 24" Section Double Wall Pipe, Galvanized P58-36 36" Section Double Wall Pipe, Galvanized P58-48 48" Section Double Wall Pipe, Galvanized PA5
Fireplace Installation CHECK GAS TYPE Use proper gas type for the fireplace unit you are installing. If you have conflicting gas types, do not install fireplace. See retailer where you purchased the fireplace for proper fireplace according to your gas type or to purchase gas conversion kit (see Accessories, page 42). Installing optional blower accessories NOTICE: If installing blower in an existing fireplace with gas connections, shut off gas supply and disconnect heater from gas supply.
Fireplace Installation Continued CAUTION: Never touch the blower wheel while in operation. 9. Check to make sure that the power cord is completely clear of the blower wheel and that there are no other foreign objects in blower wheel. Turn blower on and check for operation. Turn blower off by turning knob fully counterclockwise before continuing. 10. Peel off the backing paper and stick the supplied wiring diagram decal on the firebox bottom approximately 12" in front of the blower (see Figure 28).
Fireplace Installation Installing Gas Piping to Fireplace Location Continued 7. Check to make sure that the power cord is completely clear of the blower wheel and that there are no other foreign objects in blower wheel. Also double check all wire leads and make sure wire routing is not pinched or in a precarious position. Correct accordingly. 8. Turn on power to duplex outlet if previously turned off per the warning in column 1, page 19. 9. Plug in blower power cord to duplex outlet. 10.
Fireplace Installation Continued CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas volume to fireplace. If pipe is too small, undue loss of volume will occur. Installation must include an equipment shutoff valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from fireplace (see Figure 32).
Fireplace Installation Continued To Gas Supply (Natural) Equipment Shutoff Valve To External Regulator (Propane/LP) Flexible Gas Line Do NOT Kink Control Valve Figure 33 - Connecting Flexible Gas Line to Millivolt Valve CHECKING GAS CONNECTIONS WARNING: Test all gas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once. 4. Check all joints of gas supply piping system. Apply noncorrosive leak detection fluid to all joints.
Fireplace Installation Installing Optional Wireless hand-held REMOTE CONTROL HRC100 and HRC200 Series Continued Pressure Testing Fireplace Gas Connections 1. Open equipment shutoff valve (see Figure 34, page 23). 2. Open propane/LP supply tank valve for propane/LP fireplace or main gas valve located on or near gas meter for natural gas fireplace. 3. Make sure control knob of fireplace is in the OFF position. 4.
Fireplace Installation Continued Installing 9-Volt Alkaline Battery in HandHeld Remote Control Unit 1. Remove battery cover on back of remote control unit. 2. Attach terminal wires to a 9-volt alkaline battery (not included). Place battery into the battery housing. 3. Replace battery cover onto remote control unit.
Fireplace Installation Continued 4. Remount the new frame at the hinge with five new screws before closing door. This will ensure seating of the gasket. 5. Close glass door frame. Lock latches by placing the bar under the tab on door and pushing down and back on latch (see Figure 42, page 25). 6. Replace screen/rod assembly by reversing step 1. 7. Replace louvers by reversing procedure under Removing Louver Panels, page 25. Cleaning Glass Door See Cleaning and Maintenance on page 31.
Fireplace Installation Operating Fireplace Continued 8. Install rear brick panel first. Rest bottom edge of panel on back edge of burner assembly (see Figure 44). 9. Install left side brick panel by sliding it between the burner assembly and the side of the firebox (see Figure 44). 10. Install the right brick panel using the same method described in step 6 for left brick panel. 11. Replace deflector shield using screws removed in step 7. 12.
OPERATIng fireplace Gas Control Variable Control Knob Knob Piezo Ignitor IH ON OFF PILOT LO Figure 45 - Control Valve TO TURN OFF GAS TO APPLIANCE 28 Blower Control Knob (Optional Accessory) OFF Variable Control Knob ON Selector Switch in Remote Position N O Shutting Off Burners Only (pilot stays lit) You may shut off the burners and keep the pilot lit by doing one of the following: 1. Turn gas control knob clockwise to the PILOT position. 2. Set selector switch in the OFF position.
OPERATIng fireplace Continued On/Off Series Model HRC100 Hold the control button on the hand-held remote until burner turns on. Hold the control button again until burner turns off (see Figure 47). To Lock press both buttons on hand-held remote control until light stops flashing. Handheld remote control is now locked. If the fire is on it will be turned off automatically. In the locked state, the light will not light up when any button is pressed.
OPERATIng fireplace Continued Key Pad Lock Feature This feature allows the user to lock/unlock the keypad on the hand-held remote in the MANU or AUTO mode to prevent inadvertent operation (i.e. children operating the hand-held remote control, etc.). The keypad is locked in either on or off. Press the POWER and LOCK buttons together to turn the unit on or off. operating optional GWMT1 - Wall Mounted Thermostat WARNING: Do not connect the thermostat to a power source.
Inspecting Burners Continued BURNER FLAME PATTERN Burner flames will be steady; not lifting or floating. Flame patterns will be different from unit to unit and will vary depending on installation type and weather conditions. If the vent configuration is installed incorrectly, the flames will lift or "ghost". This can be dangerous. Inspect the flames after installation to ensure proper installation and performance. Figure 50 shows a typical flame pattern.
Cleaning and Maintenance Continued CAUTION: Do not vacuum if pieces are hot. Use only the tempered glass door replacement intended for this fireplace (see Replacement Parts, page 37 for detail on ordering). No substitutions may be made. See Removing/Replacing Glass Door, page 25 for instructions for replacing glass door. WARNING: Do not operate fireplace with the glass door unlatched, removed, cracked or broken.
Troubleshooting WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle or similar object to clean pilot. This can damage pilot unit. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE When ignitor button is pressed, there is no spark at pilot 1. Ignitor electrode not con- 1. Reconnect ignitor cable nected to ignitor cable 2. Ignitor cable pinched or wet 2.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Pilot lights but flame goes out 1. Gas control knob not fully 1. Press in gas control knob when control knob is released pressed in fully 2. Gas control knob not pressed 2. After pilot lights, keep gas in long enough control knob pressed in 30 seconds 3. Equipment shutoff valve not 3. Fully open equipment shutoff fully open valve 4. Pilot flame not touching 4.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces a whistling noise 1. Turning gas control knob to 1. when burner is lit HI position when burner is cold 2. Air in gas line 2. Turn gas control knob to LO position and let warm up for a minute Operate burner until air is removed from line. Have gas line checked by local propane/ LP or natural gas company 3. Dirty or partially clogged 3.
TROUBLESHOOTING Continued WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Fireplace produces unwanted 1. Gas leak. See Warning 1.
Replacement Parts Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. Parts Under Warranty Contact authorized retailers of this product. If they can not supply original replacement part(s), call DESA’s Customer Service Department at 1-866-672-6040.
Illustrated Parts Breakdown Models KC42N, VKC42N, KC42P and VKC42P Series 21 24 22 6 7 23 8 4 1 9 11 3 20 18 12 10 19 17 13 2 14 16 15 5 38 www.desatech.
PARTS LIST Models KC42N, VKC42N, KC42P and VKC42P Series This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 37 of this manual. KEY NO.
illustrated parts breakdown Burner assembly for models KC42N, VKC42N, KC42P AND VKC42P Series 12 1 2 7 10 20 15 3 19 18 17 12 13 4 5 9 22 17 18 21 TPTH TP TH 14 11 12 8 40 6 14 16 www.desatech.
PARTS LIST Burner assembly for models KC42N, VKC42N, KC42P AND VKC42P Series This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 37 of this manual. KEY NO.
Accessories Notice: All accessories may not be available for all fireplace models. Purchase these fireplace accessories from your local retailer. If they can not supply these accessories, call DESA’s Sales Department at 1-866-672-6040 for information. You can also write to the address listed on the back page of this manual.
Accessories Continued Receiver and Hand-Held on/off Remote Control Kit - HRC100 Series Allows the fireplace to be turned on and off conveniently. A wall-mounted docking station is included. Wall mounted thermostat control kit - gwmt1 (Not Shown) Allows easy wall access for thermostatic operation of your fireplace. Wall mounted on/off switch gwmS2 (Not Shown) Allows burner system to be turned on and off with a wall switch. 116239-01F www.desatech.
Warranty Information KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied.
