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BEFORE YOU BEGIN 

Read this entire manual before you use your new fireplace insert (especially the section “Safety Precautions”).  Failure to 
follow the instructions may result in property damage, bodily injury, or even death. 

 

Remote Control Transmitter Functions 

 

NOTE

: The Wall Receiver will “beep” once every time 

a Remote Transmitter Key is pressed, signaling that 
the command has been received. 

Identify the four function buttons on the Remote 
Transmitter:

 

 

1. 

ON/OFF KEY

: This button turns the 

system ON or OFF. When this but-
ton is pressed and the system is 
OFF, the pilot light will stay ON if 
the “Standing Pilot Switch” is in the ON position. 

2. 

THERMOSTAT KEY

: This button, when pressed after the ON/OFF KEY is pressed and the sys-

tem is ON, will allow the selection of three modes: Manual Operation, Normal Thermostat and 
Smart Thermostat. 

a. 

Manual Mode

: In this mode, the room temperature is ignored and the fireplace can be turned ON indefinitely. The 

room temperature rise has no effect on this mode.  All other functions such as fan speed control, flame height 
control, secondary burner On/OFF control and Accent Light ON/OFF controls will be manually controllable. 

b. 

Normal Thermostat

: In this mode, the fireplace will 

stay functioning until the room temperature increases 
1

o

F above the Set Point Temperature. To increase the 

Set Point Temperature, Press the UP button until the 
desired temperature is displayed in the SET POINT 
TEMPERATURE window. The fan will turn on 5 
minutes after fireplace startup and will turn off 12-1/2 
minutes after the flames turn off, in this mode. The 
flame height can be adjusted while the fireplace is func-
tioning, fan speed can be adjusted after 5 minutes of 
startup. Secondary burner can be turned On or Off at 
any time after startup. The Accent Light can be turned 
on or off any time after startup. 

c.

 

Smart Thermostat

: In this mode, all other functions 

except the flame height adjustment are allowed. Manu-
al flame height adjustment is not allowed in this mode.  
The Smart Thermostat function adjusts the flame height in accordance to the difference between the set point 
temperature and the actual room temperature.  As the room temperature gets closer to the set point temperature, 
the Smart Function automatically modulates the flame down.

  

3.

 

UP/DOWN KEY

: This key is used to increase or decrease the Set Point Temperatures, Flame Height 

and Fan Speed and to toggle between Accent Light ON/OFF and Secondary Burner ON/OFF. 

MODE SELECTION KEY

: This key is used to toggle between the various function icons: Set Tempera-

ture, Flame Height and Secondary Burner.

  

 
Setting Pilot to IPI versus CPI mode: 

With the remote transmitter OFF, press the MODE button. You will see 
either “CPI” or “IPI” displayed on the transmitter screen. Press the UP 
arrow button to set “CPI” mode and press the DOWN arrow button to set 
“IPI” mode. One set to the desired setting, press On/Off button to acti-
vate the fireplace. 

SMART

ON

OFF

SMART

MODE

NORMAL

THERMOSTAT

MANUAL

MODE

68

Hi

MAX

MAX

Hi

OFF

76°

F

F

76°

ON

SMART

76°

F

Summary of Contents for m91

Page 1: ...fire department Installation and service must be performed by a qualified installer service agency or the gas suppli er WARNING Do NOT use this appliance if any part has been under water Immediately c...

Page 2: ...nt avec les types de gas indiqu s sur la plaque signal tique Ne pas l utiliser avec d autres gas sauf si un kitde conversion certifi est install SAFETY AND WARNING INFORMATION READ and UNDERSTAND all...

Page 3: ...d d installer une barri re physique si des personnes risques habitent la maison Pour emp cher l acc s un foyer ou un po le installez une barri re de s curit cette mesure emp chera les tout petits les...

Page 4: ...position See page 52 for details SECONDARY AIR INTAKE ADJUSTMENT DAMPER This is located above the glass frame in the top convec tion air cavity Adjustment is to be made by loosening the securing nut t...

Page 5: ...25 TEMPERATURE INDICATOR O F OR O C 27 KEY LOCK FUNCTION 27 LOW BATTERY POWER DETECTION 27 OPERATING DURING POWER OUTAGES 27 FIRST TIME PILOT LIGHTING INSTRUCTIONS 28 INITIALIZING THE REMOTE CONTROL...

Page 6: ...WEIGHT 165 lbs SAFETY AGA CERTIFIED ELECTRONIC IGNITION IPI SYSTEM ACTIVATED WITH THERMOSTATIC REMOTE CONTROL GAS REQUIREMENTS SUPPLY PRESSURE GAS INLET 3 8 N P T NAT GAS 7 W C 5 0 W C MIN 11 W C MAX...

Page 7: ...ding Code 3 A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a min imum height of eight 8 feet above grade directly in line with the exhaust vent...

Page 8: ...ds of high surface temperature and should STAY AWAY to avoid burns or clothing ignition Young children should be CAREFULLY SUPERVISED when they are in the same room as the appliance These units MUST u...

Page 9: ...e person More frequent cleaning may be required due to excessive lint from carpeting bedding material carbon build up etc It is imperative that control com partments burners and circulating air passag...

Page 10: ...16 in front of the fireplace when this insert is installed at floor level VENTING REQUIREMENTS Use only Mendota specified vents and vent caps when installing your fireplace insert All vent pipe secti...

Page 11: ...1 7 8 15 3 4 Minimum Fireplace Depth Required 17 3 8 27 5 8 VISIBLE GLASS SIZE 398 SQ IN ACTUAL GLASS SIZE 468 SQ IN B A 22 3 16 MINIMUM FIREPLACE WIDTH REQUIRED AT REAR WALL 12 7 8 9 5 8 15 3 4 MINIM...

Page 12: ...E NO HEARTH PROTECTION PAD IS REQUIRED 8 0 12 1 1 0 4 5 6 7 8 9 10 11 12 7 6 5 4 3 2 1 0 8 APPROVED MANTEL PROFILES MANTEL DEPTH IN FIREPLACE FACE MUST BE COVERED W NONCOMBUSTIBLE FACING IN THIS AREA...

Page 13: ...e damper in open position NOTE Massachusetts requires that the flue damper must be re moved or permanently welded in the open position 6 If damper opening is too small for the 4 3 flue liners it will...

Page 14: ...COMPONENTS AS LISTED IN FIGURES BELOW The solid fuel fireplace chimney must be clean and in good working order and is constructed on non combustible materials Chimney cleanouts must fit properly The r...

Page 15: ...of the liner s and tie a rope to it Two installers should proceed to the roof and drop the rope with weight on the end to make sure it goes all the way down and insert the liner s past the flexible po...

Page 16: ...Adapter forward between guide rails Vent Adapter s front flat section should contact insert top as you slide the Vent Adapter forward 18 Use Glass Latch Tool to grab Vent Adapter through slot and hole...

Page 17: ...leveling the unit may need to be shimmed with washers under the bottom corners of insert 20 The proper Insert Faceplate can now be placed in position Assemble surround by following instructions suppli...

Page 18: ...t surface of the door glass If a raised hearth extends less than 16 refer to the diagram above and the following procedure to see if additional floor protection is required Project a line using string...

Page 19: ...rs PIPE LENGTH FEET SCHEDULE 40 PIPE INSIDE DIA TUBING TYPE L OUTSIDE DIA NAT L P NAT L P 0 10 1 2 1 3 cm 3 8 1 0 cm 1 2 1 3 cm 3 8 1 0 cm 10 40 1 2 1 3 cm 1 2 1 3 cm 5 8 1 6 cm 1 2 1 3 cm 40 100 1 2...

Page 20: ...URAL GAS 7 0 W C 1 75 kPa 5 0 W C 1 12 kPa 11 W C 2 61 kPa L P GAS 12 0 W C 2 99 kPa 12 W C 2 99 kPa 13 0 W C 3 24 kPa TURN GAS VALVE KNOB TO HIGH POSITION GAS PRESSURES MAY VARY PLUS OR MINUS 5 NOTE...

Page 21: ...des a 4XAA Battery Pack and a connector wire harness that is designed to be used as the 6V DC power source during electrical power outage conditions Planning for AC 120 VAC connection Two options exis...

Page 22: ...formation sticker must be filled out by the installer and adhered to the appliance at the time of conversion Cet appareil est equip pour des altitudes compries entre 0 et 2000 pieds 0 610 m seulement...

Page 23: ...in this appliance including field installed supply line fittings and all factory installed gas train connections between the gas valve and the burner orifice s and pilot light must be leak tested prio...

Page 24: ...t at top of glass frame 2 Pull Glass Latch Tool outward about 3 8 3 Rotate Glass Latch Tool 90 degrees 4 Release Glass Latch Tool 5 Remove Glass Latch Tool To Latch Glass Frame Latches reverse steps 5...

Page 25: ...closed fully For LPG applications start with air shutter open to 3 8 After burner has been properly installed and operated for 20 minutes small additional adjustments to the air shutter may be necess...

Page 26: ...in the SET POINT TEMPERATURE window The fan will turn on 5 minutes after fireplace startup and will turn off 12 1 2 minutes after the flames turn off in this mode The flame height can be adjusted whi...

Page 27: ...1 and the Down but ton is pressed all burners will turn OFF If in IPI mode the pilot light will also extinguish If in Standing Pilot Mode the pilot light will remain ON Note If in SMART model the flam...

Page 28: ...e batteries used and how long the batteries have been installed in the wall receiver These batteries are only utilized during power outages Replace these batteries every heating season even if you hav...

Page 29: ...til the pilot flame lights and the pilot is burning steadily 7 Once the pilot flame is lit and well established close glass door WARNING NEVER IGNITE MAIN BURNERS WITH GLASS DOOR REMOVED OR OPEN Doing...

Page 30: ...the main fireplace burners are operating IPI Mode This mode turns the pilot light OFF when the fireplace is not functioning and only lights the pilot light automat ically when a call for heat is made...

Page 31: ...de or CSA C22 1 Canadian Electrical Code Caution Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and danger ous operation and Verify proper operation af...

Page 32: ...x replace if necessary D Periodically check to verify that the vent system and vent cap are open and free of blockage E Before re installing glass have qualified service person check the operation of...

Page 33: ...y having jurisdiction If the information in these instructions is not followed exactly a fire explosion or production of carbon monoxide may result causing property damage personal injury or loss of l...

Page 34: ...located on backside of burner 8 Locate and Identify the Burner Orifice Spud The Orifice Spuds can be removed and installed using a deep well socket and ratchet WARNING Make certain to Secure the Bras...

Page 35: ...is set to burn NG Push Clip in so that NAT is not visible 12 Tighten down Hex shaped base of pilot using a open end wrench 13 Before reinstalling the burner loosen the screw that secures the rotary a...

Page 36: ...ure Regulator to the gas valve body and remove NG Pressure Regulator see following page for detailed instructions Note Be careful when remov ing or tightening the screw on the back side of the pressur...

Page 37: ...ailure to use only parts specifically ap proved with this appliance may result in property damage or personal injury AVERTISSEMENT Risque de dommages ou de blessures si les pi ces ne sont pas install...

Page 38: ...ing the conversion process check for gas leaks with soap and water solution at all plumbing joints prior to placing this appliance into operation It is recom mended that all gas plumbing joints factor...

Page 39: ...t for varying altitudes the information sticker must be filled out by the installer and adhered to the appliance at the time of conversion Cet appareil est equip pour des altitudes compries entre 0 et...

Page 40: ...run at their maximum speed for two 3 hour periods The burner flames may be on or off during these cycles The blowers in a few inserts may take longer to break in and may require addi tional operation...

Page 41: ...ceplate is available in three designs and various sizes consult with your dealer on the various sizes available The three Faceplate Surround designs are A outer edge return B flat no return outer edge...

Page 42: ...when it may be dark to the Back up DC Power Inlet port is more important than aesthetic appeal at oth er times Mendota recommends that you move the Backup DC Power Inlet Port to the front face or the...

Page 43: ...rear of the Backup DC Inlet Port fitting 3 Loosen and remove the securing nut for the Inlet Port fitting then lift it up and out carefully while guiding the wires through the open slot 4 Carefully pul...

Page 44: ...lange MOUNTING THE COVER PLATE 1 Insert the stud on the back of the cover plate through the small knock out hole above the DC Inlet 2 Obtain a 5 16 box wrench Hold the 6 lock nut on the backside of th...

Page 45: ...off and the local Mendota dealer promptly informed Mendota products are designed and tested to operate without producing any sooting when installed and operated correctly Mendota dealers will correct...

Page 46: ...ONDARY AIR INTAKE DAMPER The SECONDARY AIR INTAKE DAMPER is located in the convection air cavity on top of the firebox It is accessible through the slot that is located directly above the glass frame...

Page 47: ...ge 2 If flame is too orange and has sooty tips pull air shutter knob out open in small increments until sooting stops IF SOOTING DOES NOT STOP TURN OFF UNIT AND CALL YOUR MENDOTA SERVICE PERSON to ins...

Page 48: ...ailable through Johnson Gas Appliance Company Con tact your dealer for more detailed ordering information GLASS RETAINER TABS GLASS FRAME ASSEMBLY HA 82 00403 REPLACEMENT PARTS LIST ITEM PART NUMBER D...

Page 49: ...and manufacturer s specifications CHECK FOR PROPER CLEARANCES TO COMBUSTIBLES Per pipe manufacturer s specifications INSTALL PROPER SIZE GAS LINES CHECK FOR GAS LEAKS Per Manual CHECK FOR CORRECT GAS...

Page 50: ...49 TAPE SHUT JOHNSON GAS APPLIANCE COMPANY 520 E AVENUE N W CEDAR RAPIDS IA 52405 POSTAGE NEEDED...

Page 51: ...ranty does not cover glass or log breakage Mendota has the right to investigate and inspect the exact original fireplace and materials in the event a claim is made without alterations or tampering to...

Page 52: ...Johnson Gas Appliance Company 520 E Avenue N W Cedar Rapids IA 52405 Website www johnsongas com or www mendotahearth com...

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