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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

5

Millivolt appliances are fi tted  with  an  OFF/ON 
Rocker Switch located behind the control 
compartment access panel, below the appli-
ance front glass enclosure panel (see 

Figure 1

  

for location).  Once the pilot is lit, the OFF/ON 
rocker switch will control the appliance OFF/ON 
burner operation.  To operate:  Toggle the switch 
between its ON and OFF positions.

If your millivolt appliance is equipped with an 
optional remote switch kit (wall switch or remote 
control) and the pilot is lit, the appliance main 
burner may be turned on and off using the 
optional switch. When using an optional remote 
switch, turn off the standard OFF/ON switch.

Note:

 To prevent excessive resistance in burner 

circuit (which can cause burner operation prob-
lems), only one burner control switch should be 
wired to valve.  Therefore, if an optional control 
switch is installed, the standard Off/On switch 
and wires should be removed.

Electronic Appliances -

To light electronic appliances refer to the 
detailed lighting instructions found  on 

 Pagex 

19.

  

Electronic appliance lighting instructions 

may also be found on the pull out lighting instruc-
tion labels attached to the gas control valve

.  

Once the pilot is lit, if your electronic appliance 
is equipped with an optional burner control 
switch kit the appliance main burner may be 
turned on and off using the optional switch 
(See 

Optional Accessories

 on 

Pagex 15

  - wall 

switch, or remote control Receiver). 

Figure 3

Honeywell Electronic  Gas Valve

F

F

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NI

P

S

I

N

O

L

O

R

T

N

O

C

GI

N
TI

ER

Manifold
Pressure
Port

ON / OFF Switch

Inlet 
Pressure
Port

Electronic Gas 
Control Valve

2.

 During the fi rst initial burns of these appli-

ances, there will be some odor emitted (see 

Burn-In Period

 on 

Page 3 

). 

3.

 Keep the lower control compartment clean 

by vacuuming or brushing at least twice a 
year.  More frequent cleaning may be required 
due to excessive lint from carpeting, bedding 
materials, pet hair, etc. 

It is very important 

that the control compartments, burners 
and circulating air passageways of the 
appliance are kept clean.

4.

 Always turn off gas to the pilot (millivolt 

appliances) and let the appliance cool down 
before cleaning. Before re-lighting, refer 
to the lighting instructions in this manual.  
Lighting instructions may also be found 
on the pull out lighting instruction labels 
attached to the gas control valve. 

5.

 Always keep the appliance area clear and 

free from combustible materials, gasoline 
and other fl ammable liquids.

6.

  Remember, Millivolt appliances have a con-

tinuous burning pilot fl ame.  Exercise cau-
tion when using products with combustible 
vapors.

VENT OPERATION TEST 

A vent operation test is required as part of the 
installation to verify that proper venting condi-
tions exist and should be done periodically to 
ensure nothing has changed that would affect 
proper venting of the appliance.

Procedure:

1. 

ENSURE APPLIANCE IS OFF (PILOT ONLY) 

AND COOL. 

2. Open both latches on one of the glass 

enclosure doors and slightly prop it open at 
the bottom (approx. 1/4” gap). See 

Figure 

6 on Page 9.

 

3.  Turn on all the exhaust fans in the dwelling 

(and any other appliances which remove 
air from the dwelling, such as a furnace or 
clothes dryer, etc.).  

4. Ensure that all the doors and windows in 

the room where the fi replace is located are 
closed.

5. Light the appliance (see 

Lighting Instruc-

tions

Pages 18 & 19

 ).  Adjust fl ame 

height to highest setting and operate for 
approximately 5-10 minutes.  Do not leave 
appliance unattended.

6.  Take a smoke producing device and move it 

along the bottom edge of the glass door (where 
it is cracked open).  If smoke is drawn into the 
fi rebox, the vent operation is adequate.

 

 

  IF THE SMOKE IS NOT DRAWN INTO 

THE FIREBOX, TURN THE APPLIANCE 
OFF AND CALL A QUALIFIED SERVICE 
TECHNICIAN.

Variable Flame Height Adjustment 
( Millivolt Appliances only) 

1

. All Millivolt appliances are equipped with a 

variable gas control valve. Flame height for 
these models may be adjusted through a 
range between fi xed low and high settings 
while the appliance is in operation. Adjust 
the fl ame height as desired after lighting the 
appliance by rotating the variable adjustment 
control knob (HI/LO) located on the front of 
the valve (refer to 

Figure 2 

). 

SPILL SWITCH OPERATION

Manual-Reset (safety limit) Spill Switch

This appliance is equipped with a 

(safety limit) 

spill switch 

that is designed to "trip" and discon-

nect the burner circuit if fl ue spillage occurs  
(because of improper venting of combustion 
products or vent blockage).  If, during appliance 
operation, the burner fl ame goes out (indepen-
dently of the burner OFF/ON wall switch), it may 
be due to the operation of this 

(safety limit) spill 

switch

.  If this switch "trips" it will need to be 

manually reset by pressing the reset button on 
switch (see 

Figure 4 

).

Procedure to Reset (safety limit) Spill Switch

ALLOW APPLIANCE TO COOL COMPLETELY 
BEFORE ACCESSING AND RESETTING

To access the spill switch:

1.  Pull off the top louvered panel.
2.  Locate and  press the red reset button on 

the switch (it will click & lock in).

The appliance should then relight and remain 
lit.  If this does not occur, 

turn off the appliance 

and call a qualifi ed service technician

.

Press Reset Button on 
Spill Switch

Remove Top 
Louvered 
Panel (or 
optional 
radiant panel, 
if applicable)

Figure 4  -  Spill Switch

Summary of Contents for Merit Plus MPB35ST-NE

Page 1: ...ot store or use gasoline or other flammables or liquids in the vicinity of this or any other appliance FOR YOUR SAFETY What to do if you smell gas DO NOT light any appliance DO NOT touch any electrica...

Page 2: ...Electronic models have a fixed rate gas valve Input of electronic models is shown in the following table INTRODUCTION The millivolt appliances have a millivolt gas controlvalvewitha piezoignitionsyste...

Page 3: ...ngappliance voiding its warranty Any change to this appliance and or its operating controlsisdangerous Improper installation or use of this appli ance can cause serious injury or deathfromfire burns e...

Page 4: ...alve shown in Figure 3 Gas Control Compartment Access The gas controls can be found behind the control compartment access panel To open the control compartment access panel actuate the spring loaded m...

Page 5: ...ng pilot flame Exercise cau tion when using products with combustible vapors VENT OPERATION TEST A vent operation test is required as part of the installationtoverifythatproperventingcondi tions exist...

Page 6: ...d service technician should follow vent installation instructions for proper reassembly and proper sealing of the venting system components However more frequent periodic inspections and cleanings sho...

Page 7: ...s properly installed Generally the glass enclosure panels should not be removed except to gain access to the components within the firebox and the appliance may only be operated without the front glas...

Page 8: ...ulite Bag 2 liters F D Bottom View of Logs in packaging Top View of Logs C E A B Glowing Embers Bag of Glowing Embers rockwool Separate into Quarter Size separate Pieces Top View of Logs Installed E B...

Page 9: ...tted Distribute these pieces over the surface of the burner as shown in Figure 8 Do not use more than is necessary Ensure that the main burner ports remain uncovered by the ember material Note This ap...

Page 10: ...ar sooty Air Shutter Adjustment Guidelines Amount of Primary Air Flame Color Air Shutter Adjustment If air shutter is closed too far Flame will be orange Air shutter gap should be increased If air shu...

Page 11: ...box Clean firebox walls and log grate Replace logs embers rockwool and vermiculite as detailed in this manual see Pagexs 8 10 Check Flame Patterns and Flame Height Homeowner Refer to Figurex 15 on Pag...

Page 12: ...ual Reset Spill Switch has Tripped or is defective Follow Manual Reset procedure on Page 6 Once the redresetbuttonisfullydepressedandclicksin check continuity with a multimeter between switch terminal...

Page 13: ...V common leads to valve control Mustmeasureatleast19 5VACwith igniter powered see insert A To identify proper lead this check must be done with the valve control con nected and igniter powered NO Chec...

Page 14: ..._____ The Date On Which Your Fireplace Was Installed___________________________ The Type of Gas Your Fireplace Uses ____________________________________ Your Dealer s Name ____________________________...

Page 15: ...on near the fireplace WhiteWallSwitchKit Cat No ModelNo Description 85L87 FWSK OFF ONWallSwitchKit ref Form 750 127M Touch Up Paint Kit Repair of minor scratches and discoloration of theappliancecharc...

Page 16: ...58 AD35C 35 Arch Doors Charcoal H0859 AD35TI 35 Arch Doors Textured Iron H0860 AD35SP 35 Arch Doors Satin Pewter H0861 AD35AB 35 Arch Doors Antique Brass Arch Pane Design Kits H0930 APD35C 35 Arch Pan...

Page 17: ...to previously installed Multi Open Series appliances The decorative arch kits can not be used in conjunction with the screen panel kit 35 Arch Door Kits Cat No Model No Description 26M43 ADK35CMPB Arc...

Page 18: ...AT TO DO IF YOU SMELL GAS Extinguish any open flame Open windows Do not light any appliance Do not touch any electrical switches TO TURN OFF GAS TO APPLIANCE 1 Turn remote wall switch OFF The pilot wi...

Page 19: ...s been under water 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 LIGHTING INSTRU...

Page 20: ...l 11 H3358 1 Grate Assembly All 12 69L2101 4 Latch Glass Enclosure Panel All 13 H3354 1 Firebox Sub floor All Item Part Cat Qty Description Where Used Misc Replacement Parts 14 H3210 1 Log Set All 15...

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