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Hearth & Home Technologies • Fireside Burner/Hearth Kits • 4004-304 Rev C • 08/2010

1

TM

Models:

MHK18NG

MHK24NG

STMHK18NG

STMHK24NG

Fireside Burner/Hearth Kits

For Natural Gas Use Only

Installation

 Instructions

Check with your local building code agency before you begin installation to ensure compliance with local codes, including 

the need for permits and follow-up inspections. If you encounter any problems regarding code approvals, or if you need 

clarification of any of the instructions contained here, contact the Technical Services Dept., Hearth & Home Technologies 

Inc., phone 1-888-427-3973 or 1-800-927-6841.

Note: 

An arrow (

) found in the text signifies change in 

content.

DO NOT DISCARD THIS MANUAL

CAUTION

•  Important  operating 

a n d   m a i n t e n a n c e 

instructions included.

• 

Leave this manual with 

party  responsible  for 

use and operation.

• 

Read,  understand 

and  follow  these 

instructions  for  safe 

i n s t a l l a t i o n   a n d 

operation.

DO

NO

T

DIS

CA

RD

If the information in these instruc-

tions is not followed exactly, a 

fire may result causing property 

damage, personal injury, or death.

 

•  Do not store or use gasoline or other flam-

mable 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.

-  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.

•  Installation and service must be performed 

by a qualified installer, service agency, or 

the gas supplier.

WARNING

HOT! DO NOT TOUCH

SEVERE BURNS MAY RESULT.

CLOTHING IGNITION MAY RESULT.

WARNING

•  Keep children away.  

•  CAREFULLY SUPERVISE children in same room as 

appliance.

•  Alert  children  and  adults  to  hazards  of  high 

temperatures.

•  Keep  clothing,  furniture,  draperies  and  other 

combustibles away. 

Glass  and  other  surfaces  are  hot  during 

operation and cool down.

Installation  and  service  of  this 

appliance should be performed by 

qualified personnel. Hearth & Home 

Technologies suggests NFI certified 

or factory-trained professionals, or 

technicians  super-

vised  by  an  NFI 

certified  profes-

sional.

In the Commonwealth of Massachusetts:

•  This appliance must be installed by a licensed plumber 

or gas fitter.

•  The chimney flue damper, when used with gas logs, will 

be welded open or completely removed.

•  A CO detector shall be installed in the room where the 

appliance is installed.

Summary of Contents for MHK18NG

Page 1: ...ors 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 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 Installation and service must be performe...

Page 2: ... noted otherwise applies to all models and gas control sys tems Your new gas log set will give you years of durable use and trouble free enjoyment Welcome to the Hearth Home Technologies family of appliance products Listing Label Information Location The model information regarding your specific gas log set can be found on the rating plate Congratulations Homeowner Reference Information Model Name...

Page 3: ... Left Side Gas Piping 7 C Gas Pressure 8 4 Installation Instructions A Install the Damper Stop 9 B Install the Burner Pan Assembly 9 C Install the Grate 9 D Place Sand and Rockwool 9 E Install the Logs 10 F Adjust the Burner Flame 10 G Inspect the Venting System 10 5 Operating Instructions A Lighting Instructions 11 B Glass Doors 12 C Important Safeguards 12 6 Maintaining and Servicing the Applian...

Page 4: ...e Technical Services Department at 1 888 427 3973 or 1 800 927 6841 B Table 1 Improper installation adjustment alteration service or maintenance can cause injury or property damage Refer to the owner s information manual provided with this appliance For assistance or additional information consult a qualified installer service agency or the gas supplier WARNING Fire Risk Exhaust Fumes Risk Do NOT ...

Page 5: ...equired for installation Pliers Phillips screwdriver Tape measure Crescent wrenches Gas shutoff valve Non corrosive leak check solution 3 4 in wrench 7 16 in wrench Sharp Edges Wear protective gloves and safety glasses during installation CAUTION D Inspect the Appliance and Components Remove the contents from the carton Attached to the burner are tags identifying the manufacturer name serial numbe...

Page 6: ...r Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water WARNING Inspect appliance and components for damage Damaged parts may impair safe operation Do NOT install damaged components Do NOT install incomplete components Do NOT install substitute components Report damaged parts to dealer W...

Page 7: ... the gas supply line installed in accordance with local building codes if any If not follow ANSI 223 1 Installation should be done by a qualified installer approved and or licensed as required by the locality In the Common wealth of Massachusetts installation must be performed by a licensed plumber or gas fitter Note A listed and Commonwealth of Massachusetts approved 1 2 in 13 mm T handle manual ...

Page 8: ...ak Test Make sure the gas connections are tight Turn on the gas and coat each joint with a non corrosive gas leak check solution Air bubbles will form indicating any leaks DO NOT USE A FLAME OR ANY TYPE OF IGNITION SOURCE TO CHECK FOR LEAKS All leaks must be corrected before proceeding with installation The appliance must only be installed in a solid fuel burning fireplace with the flue damper cla...

Page 9: ...connector to the brass elbow or safety pilot fitting Attach the other end to the brass adapter at the gas tube C Install the Grate The grate should be centered over the burner pan side to side If the grate sits toward the front of the burner pan the flames will be larger coming through the logs If the grate sits toward the back of the burner pan the ember bed will be more prominent Refer to Figure...

Page 10: ...e Do not operate this appliance Cleaning Periodic examination and cleaning of the venting system of the fireplace should be done before initial use and at least annually by a qualified agency Fire Risk Explosion Risk Inspect external vent cap regularly Ensure no debris blocks cap Combustible materials blocking cap may ignite Restricted air flow affects burner operation WARNING Fire Risk Explosion ...

Page 11: ...ome gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS 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 C Do not use this appliance if any part has bee...

Page 12: ...nd ventilation air is not obstructed front grilles and vent caps Before installing into a solid fuel burning fireplace the chimney and firebox should be inspected and cleaned to remove soot creosote ashes paint bird nests etc Annual examination of the chimney must be performed by a qualified agency to ensure proper ventilation of flue gases created by this appliance Have the chimney and adjacent s...

Page 13: ...technician recommended Check Condition of doors surrounds and fronts Obstructions of combustion and ventilation air Condition of logs Condition of firebox Gas connections and fittings Obstructions of termination cap Clean Glass Logs Burner burner ports Risk of Fire Delayed ignition or explosion Exposure to combustion fumes Odors WARNING Repair and replacement work should be done by a qualified ser...

Page 14: ... 2010 14 7 Reference Materials A Replacement Parts Exploded Parts Diagram MHK NG Service Parts Fireside Hearth Kits Beginning Manufacturing Date 8 1 2010 Ending Manufacturing Date Active TM MHK Hearth Kit Assembly 1 MHK Burner Pan Assembly 2 MHK Grate Assembly 3 7 6 5 4 8 ...

Page 15: ... Burner Pan Assy SRVAGLBP14 SRVAGLBP18 1 2 Grate Assy SRVAG16 SRVAG18 1 3 Orifice BPO 2 26 BPO 2 20 1 4 Connector Tube SRV3814NXN SRV3814NXN 1 5 Damper Stop Assy SRV500 SC SRV500 SC 1 6 Elbow 3 8 MFL x 3 8 FPT Brass 01 1050 01 1050 1 7 Elbow 3 8 Flare x 1 2 FIP Brass 10 1037 10 1037 1 8 Cap 1 2 Malleable Pipe 10 1053 10 1053 1 Sand SRVACC15 SRVACC15 1 Lava Rock SRVACC10 SRVACC10 1 Glowing Embers S...

Page 16: ...urner Hearth Kits 4004 304 Rev C 08 2010 16 Exploded Parts Diagram STMHK NG Service Parts Fireside Hearth Kits Beginning Manufacturing Date 8 1 2010 Ending Manufacturing Date Active TM 1 STMHK Burner Pan Assembly 2 STMHK Grate 3 4 5 6 7 ...

Page 17: ...TMHK18NG STMHK24NG Qty 1 Burner Pan Assy SRVOBP18ST SRVOPB20ST 1 2 Grate Assy SRVAG16 SRVAG18 1 3 Orifice BPO 2 26 BPO 2 20 1 4 Connector Tube SRV3814NXN SRV3814NXN 1 5 Damper Stop Assy SRV500 SC SRV500 SC 1 6 Elbow 3 8 MFL x 3 8 FPT Brass 01 1050 01 1050 1 7 Elbow 3 8 Flare x 1 2 FIP Brass 10 1037 10 1037 1 Sand SRVACC15 SRVACC15 1 Lava Rock SRVACC10 SRVACC10 1 Glowing Embers SRVACC12 SRVACC12 1 ...

Page 18: ...Hearth Home Technologies Fireside Burner Hearth Kits 4004 304 Rev C 08 2010 18 ...

Page 19: ...Hearth Home Technologies Fireside Burner Hearth Kits 4004 304 Rev C 08 2010 19 ...

Page 20: ...rns For the number of your nearest Hearth Home Technologies dealer please call 1 800 927 6841 or 1 888 427 3973 NOTES DO NOT DISCARD THIS MANUAL CAUTION Important operating and maintenance instructions included Leave this manual with party responsible for use and operation Read understand and follow these instructions for safe installation and operation D O N O T D I S C A R D TM ...

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