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Congratulations on your purchase of a Montigo Fireplace.  
With over 30 years of experience, Montigo is committed 
to providing 

you  with  a  gas  fireplace  that  is  not  only  a 

beautiful addition to your space, but that is also designed 

and manufactured to the highest safety, reliability and 

engineering standards.  
We strongly encourage you to read and carefully follow 
the instructions laid out in this Installation, Operation and 

Maintenance Manual and retain it for your future reference.  

Pay special attention to all cautions, warnings, and notices 

throughout this manual intended to ensure your safety.
This manual covers installation, operation and maintenance.  

Lighting, operation and care of this fireplace can be easily 

performed by the homeowner.  All installation and service 

work should be performed by a qualified or licensed installer, 

plumber or gasfitter as certified by the state, province, region 

or governing body where the fireplace is being installed.

Warranty and Installation Information

: (See Appendix B)

The Montigo warranty will be voided by, and Montigo disclaims any 

responsibility for the following actions:

►   Modification of the fireplace and/or components including 

Direct-Vent assembly or glass doors.

►     Use of any component part not manufactured or approved 

by Montigo in combination with this Montigo fireplace system.
►     Installation other than as instructed in this manual.

Consult your local Gas Inspection Branch on installation 

requirements for factory-built gas fireplaces. Installation & repairs 

should be done by a qualified contractor.

This installation, operation and maintenance manual is 

applicable to the models described below.  Refer to your 

rating plate to verify included options.  Throughout this 

manual instructions are applicable to all models designated 

as L52DF-ST* unless otherwise noted.  

L52DF-STN

X

40,000

X

X

L52DF-STL

X 40,000

X

X

L52DF-STN-F X

40,000

X

X

L52FDF-STL-F

X 40,000

X

X

MODEL

Natural Gas Liquid Propane

Gas Rating 

(BTU hr)

Linear Burner w/ Glass 

Accessories

Standard Pilot Ignition SIT Electronic Ignition

Young children should be carefully supervised when they are 

in the same room as the applicance. Toddlers, young children 

and others may be susceptible to accidental contact burns.  A 

physical barrier is recommended if there are at risk individuals 

in the house.  To restrict access to a fireplace or stove, install 

an adjustable safety gate to keep toddles, young children and 

other at risk individuals out of the room and away from hot 

surfaces.

CAUTION

Safety Alerts

Introduction

XG0811 - 151126

L52DF*ST Indoor Gas Fireplace

Safety Alert Key

Introduction

Summary of Contents for L52DF-ST

Page 1: ...urface General Warning Blank Gas bottles Watch for falling objects Electricity Danger for cutter Entrapment hazard Battery hazard Rotating parts Low temperature Strong magnetic field Optical radiation Non ionizing radiation Radiation Hazardous to the Environment Danger of harming your hands Irritant Cutting Watch your step Slippery floor High temperatures Glass hazard Danger of suffocation High vo...

Page 2: ...Cable Installation only available for SIT Electronic Ignition Systems 17 Section 5 Installing the Gas Line 18 Section 5 1 Fuel Conversion 18 Section 5 2 Gas Pressure 18 Section 5 3 Gas Connection 18 Section 6 Finishing 19 Finishing Around the Fireplace 19 Mantels Surrounds 19 Section 7 Screen Installation and Removal 20 Section 8 Installing Removing the Door 21 Section 9 Installing the Accessories...

Page 3: ...ors Use of any component part not manufactured or approved by Montigo in combination with this Montigo fireplace system Installation other than as instructed in this manual Consult your local Gas Inspection Branch on installation requirements for factory built gas fireplaces Installation repairs should be done by a qualified contractor This installation operation and maintenance manual is applicab...

Page 4: ...stalledinaccordance with these Instructions Carefully read all the Instructions in this manual first Consult the Local Gas Branch to determine the need for a permit prior to starting the installation It is the responsibility of the installer to ensure this fireplace is installed in compliance with the manufacturers instructions and all applicable codes Due to high operating temperatures this appli...

Page 5: ...L52DF ST Indoor Gas Fireplace Page 5 XG0811 151126 Rating Plate Sample Figure A Rating Plate for L52DF ST LBL1205 V6 1 Stand Pilot Screen DEC06 2014 Teklynx LabelView Demo Installation ...

Page 6: ...tion that maintains proper clearances to air conditioning ducts electrical wiring and plumbing Safety as well as efficiency of operation should be considered when selecting the fireplace location Select a location that does not interfere with room traffic has adequate ventilation and offers an accessible path for Direct Vent installation The fireplace dimensions are shown below 47 1194 21 3 4 553 ...

Page 7: ...ver Fireplace Non Combustible Materials Only 33 1 4 door opening 39 Combustible Header Min 1 10 Top vent N G L P 84 Min Ceiling Frame in the enclosure for the unit with framing materials The framed opening for the assembled fireplace is 59 wide x 39 high x 23 3 4 deep see Figure 2 NOTE When constructing the framed opening please ensure there is access to install the gas line when the unit is insta...

Page 8: ...bustible shelf materials MODEL Top Top vent Sides Floor Mantel L52DF ST 30 1 0 See Section 6 Finishing around the fireplace NOTE Clearance from top of fireplace to a ceiling within the fireplace enclosure Clearances to Combustibles 1 clearance is maintained on sides and bottom of vent runs and 2 above horizontal vent runs to any combustible material Installation ...

Page 9: ...t 1 offset two 90 bends PVTK1 Termination Section 3 2 Installing a Roof Mounted Direct Vent Termination PVTK 1 This section applies to installations where the direct vent termi nation will be roof mounted Section 3 2 1 Venting Layout Selection of components and details of venting lay out should adhere to the following guidelines The maximum termination point is 32 above the fireplace NOTE if the m...

Page 10: ...1126 Figure 6b Top vent Roof mounted with 2 offsets 1 offset two 90 bends PVTK1 Termination Note Images are shown without screens for clarity purposes However your fireplace should not be operated without proper installation of screens Installation ...

Page 11: ...frame as shown here from the inside and attach to the MOSR by installing a min quantity of 4 bolts into the threaded nuts on the MOSR Frame Installation of termination frame at time of framing in Masonry Terminations with a BSR frame allow the installation of the frame in masonry prior to the installation of the termination 1 Frame the BSR opening to 12 x 12 2 Secure the BSR Frame to the exterior ...

Page 12: ... venting graph see Figure 9 Wall mounted Terminations The following details are some possible configurations for Wall mounted terminations Figure 9 L52DF ST Top Vent Venting Graph for wall mounted terminations Figure 9a Top Vented wall mounted installation with 1 elbow The vent run must comply with Venting Graph for Top vent wall mounted terminations Figure 9 Figure 9b Top Vented wall mounted Mult...

Page 13: ...d Retracted Multi elbow installation See Venting Graph for Top vent wall mounted terminations Figure 9 Heat Shield 96 Min 120 Max Note Images are shown without screens for clarity purposes However your fireplace should not be operated without proper installation of screens Installation ...

Page 14: ...of overlap Ensure all horizontal runs are supported with a minimum of 3 supports per 10 of venting Whenhanging supportingventing ensurethat1 clearance ismaintainedonsidesandbottomofventrunsand2 above horizontal vent runs to any combustible material Rigid pipe may be cut less than half way from the female end only Ensure when cutting sections of rigid pipe to maintain integrity of internal supports...

Page 15: ... RHS101 Installation Installing a Wall Mounted RHS101 Heat shield The RHS101 Heat shield MUST be used where the RHS8 Termination Figure 10 CANNOT be used To install the RHS101 Slide the Inner Section over the vent pipe that will connect to the fireplace Then fasten the vent pipe to the back of the fireplace with a minimum of three sheet metal screws From the outside slide the RHS101 outer section ...

Page 16: ...erate its own power on a millivolt circuit or will draw its power from an AC Connection inside the fireplace depending on the model of the unit Use only low voltage wire and DO NOT connect any external power to the remote switch Refer to Figure 12 or 13 for wiring requirements NOTE The switch location must not exceed 30 from the fire place NOTE If any of the original wire supplied with the applian...

Page 17: ...pt to re light a second or third time depending on prevailing temperatures or altitude When in CPI mode the pilot also keeps the system warm During a cold start condensation will normally form on the inner glass surface of the door This condensation will quickly dry however the condensation tends to run down the glass and cause some streaking CPI mode helps to resolve this issue If CPI mode is use...

Page 18: ...of any kind to test for leaks The manifold outlet pressure is set from the factory to the appropriate pressure but should be verified To check pressures control valves have a provision to remove a 1 8 N PT plug to be fitted with a hose barb Montigo requires a service shut off valve be located in an accessible location to isolate the gas supply Only install gas shut off valves approved for use by t...

Page 19: ...ogy to meet consumer and government demands for the wise use of energy has prompted us to manufacture many models of fireplaces which are hot fuel and energy ef ficient Please be aware temperatures over the mantel will rise above normal room temperature and walls above fireplace may be hot to touch Side wall clearances are 3 Combustible surrounds may be installed with 3 clearance to the side of th...

Page 20: ... top outer corner of the screen with your thumb and finger and pull towards yourself When the up per Screen Studs are free lift the screen at an angle from the lower slots from which the Screen Bottom Tabs are held Place the screen in a safe place To Install Screens Hold the screens at an angle away from the fireplace and locate the Screen Bottom Tabs at the lower corners of the screen Place the s...

Page 21: ... Ensure the tool is firmly in the lower end of the slot as shown Then pull toward you Caution hold the tool securely 3 Step 6 Pull hard if necessary to release the spring ten sion Caution The latch springs back with force hold the tool securely 4 Step 7 Remove the tool from the latch slot Ensure the latches are hanging freely the hook end is released from the bottom of the door Repeat all 4 steps ...

Page 22: ...the Door Section 9 Installing the Accessories Installing the Firestones The L52DF ST is supplied with Firestones Remove the door s as shown on page 21 Place the firestones randomly across the media tray as shown in Figure 19 Do not place any firestones on top the burner or pilot Figure 19 Installation with glass Firestones Optional Cultured Rocks The L52DF ST has the option of installing cultured ...

Page 23: ...urned from PILOT to OFF unless knob is pushed in slightly Do not force Standing Continuous Pilot Ignition SIT NOVA 820 with American Flame Electronic Ignition For Your Safety READ BEFORE LIGHTING phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the Fire De partment C Use only your hand to push in or turn the gas control knob Never use tools If the knob will n...

Page 24: ...next step 6 Turn fireplace ON using wall switch or remote control 7 If the Fireplace does not light the System will cycle through two trials one minute audible clicking thirty seconds of silence and then another one minute of audible clicking If the system locks out due to inadequate gas flow refer to Troubleshooting in instruction guide 8 After completion of the information in the Troubleshooting...

Page 25: ...is provided to index between the features and a Thermostat Key is used to turn On Off or index through Thermostat functions see Figure 20 Additionally a Key Lock feature is provided The Proflame 2 System consists of the following ele ments 1 Pilot Assembly 2 Proflame Gas Valve 3 Proflame 2 Control Module 4 Wiring Harness 5 Variable Speed fans 6 Variable Accent Lights 7 Proflame 2 remote control 8 ...

Page 26: ...the LCD screen on the Remote Control to verify that a C or F is visible to the right of the Room Temperature display Turn On the Fireplace With the system Off turn the master override switch to on and press the On Off Key on the Remote Control The Remote Control display will show some other active Icons on the screen At the same time the Control Module will activate the fireplace A single beep fro...

Page 27: ...mote control will change to show that the room thermostat is On and the set temperature is now displayed To adjust the set tem perature press the Up or Down Arrow Keys until the desired set temperature is displayed on the LCD screen of the Transmitter Smart Thermostat Remote Control Operation The Smart Thermostat function adjusts the flame height in ac cordance to the difference between the set po...

Page 28: ...n use the Mode Key see Figure 20 to index to the accent light icon see Figure 20m Pressing the Up Arrow Key will turn the light on at the lowest setting Continue pressing up to get brighter Pressing the Down Arrow Key will turn the lights down until you get to the off posi tion A single beep will confirm the reception of the command Disabling Thermostat Some jurisdictions and bedroom installations...

Page 29: ... the same time see Figure 20o To de activate this function press the Mode and Up Keys at the same time Remote Control When the Remote Control batteries are low a Battery Icon will appear on the LCD display of the Remote Control see Figure 20p before all battery power is lost When the batteries are replaced this icon will disappear Control Module When the back up batteries are low a double beep wil...

Page 30: ...is Kel Kem Silicone seals on inner door during initial firing will off gas leaving a visual deposit of a white substance on combustion chamber walls This can easily be removed from the chamber walls using normal household products Use a vacuum cleaner or whisk broom to keep the control compartment burner and firebox free from dust and lint Clean the primary air openings from lint embers dust etc H...

Page 31: ...re main power is ON or new batteries are installed in the remote control and backup battery pack if available 3 Check the 3 15A fuse in the con trol box and replace if necessary Pilot Igniter sparking but Pilot burner will not light 1 Verify the Inlet and Manifold Gas Pressure are within acceptable limits 2 Check all connections to gas valve 3 Check connection to stepper motor if available Pilot l...

Page 32: ...PIEZO Pilot Tubing RPTA03 Door RDTL52 Replacement Screen RSCP52 SIT IPI Proflame 2 Replacement Parts List L52DF ST NG Gas Valve Hi Low RGC3044 LP Gas Valve Hi Low RGC3045 NG Gas Valve with stepper motor RGC3033 LP Gas Valve with stepper motor RGC3034 NG Pilot Assembly RPA035 LP Pilot Assembly RPA036 Ignitor Probe Assembly RGC3075 Flame sensor rod assembly RGC3076 Pilot Tubing RPTA03 Door RDTL52 Co...

Page 33: ...0 000 BTU H 30 KW 12 inches 12 inches M clearance to forced air supply inlet 6 feet 3 feet above air inlet N clearance above paved sidewalk or paved driveway located on public property 7 feet 7 feet P clearance under veranda porch deck or balcony 22 inches to combustibles 16 inches to non combustibles 22 inches to combustibles 16 inches to non combustibles Q clearance above roof 2 feet 2 feet R cl...

Page 34: ...al use The Gas Appliances are designed to burn gas only Burning conventional fireplace fuels such as wood coal or any other solid fuel will cause damage to the Gas Appliance will produce excessive temperatures and will result in a fire hazard Limitations On Liability It is expressly agreed and understood that The Companies sole obligation and purchaser s exclusive remedy under this Warranty under ...

Page 35: ... line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the instal lation unless upon inspection th...

Page 36: ...XG0811 151126 L52DF ST Residential Gas Fireplace ...

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