MrHeater MHVFRD20NG Operating Instructions And Owner'S Manual Download Page 7

7

Operating Instructions and Owner’s Manual

Mr. Heater | Unvented Natural Gas Fired Room Heater

NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!

NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!

NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!

Figure 9

Figure 8

Figure 10

Figure 11

Figure 7

Horizontal 
Slots

Mounting 
Bracket 
mounted 
to wall

Mark mounting hole locations and drill 
holes where indicated. Allow for minimum 
clearances.

See clearance 
specs on Pg. 3

A

djoining W

all

16” (Lg)
12-9/64” (Sm)

18” Min.

3.  Insert mounting screws through 

bracket and into wall studs.

4.  Tighten screws until mounting bracket 

is firmly fastened to wall studs.

Attaching to Wall Anchor

This way allows you to attach 
mounting bracket to hollow walls (wall 
areas between studs) or to solid walls 
(concrete or masonry).
1.  Tape mounting bracket to wall where 

heater will be located. Make sure 
mounting bracket is level. For wall 
stud mounting locate one end of the 
mounting bracket over a wall stud.

2.  Mark screw locations on wall.  

See figure 7.

3.  Remove tape and mount bracket to 

wall.

Note:

 Wall anchors, mounting screws, 

and spacer are in hardware package. 
The hardware package is provided with 
heater.

4.  Drill holes at marked locations using 

5/16” drill bit. For solid walls (concrete 
or masonry), drill at least 1” deep.

5.  Fold wall anchor as shown in Figure 8 

below.

6.  Insert wall anchor (wings first) into 

hole. Tap anchor flush to wall.

7.  For thin walls (1/2” or less) insert red 

key into wall anchor. 

8.  Place mounting bracket onto wall. 

Line up holes on each end of bracket 
with wall anchors.

9.  Insert mounting screws through 

bracket and into wall anchors.

10. Tighten screws until mounting bracket 

is firmly fastened to wall.

Placing Heater on Mounting Bracket

1.  Locate two horizontal slots on back 

pane of heater. See Figure 9.

2.  Place heater onto mounting bracket. 

Slide horizontal slots onto stand-out 
tabs on mounting bracket.

Installing Bottom Mounting Screws

1.  Locate two bottom mounting holes. 

These holes are near bottom on back 
panel of heater. See Figure 10.

2.  Mark screws locations on wall.
3.  Remove heater from mounting 

bracket.

WARNING: 

Maintain minimum 

clearances shown in Figure 7. If you 
can, provide greater clearances from 
the floor and joining wall. 

Screw Hole

Screw Hole

4.  If installing bottom mounting screw 

into hollow or solid wall, install wall 
anchors. Follow steps 1 through 4 
under Attaching to Wall using Anchor. 
If installing bottom mounting screw 
into wall stud, drill holes at marked 
locations using 9/64” drill bit.

5.  Re-place heater onto mounting 

bracket.

6.  Place spacers between bottom 

mounting holes and wall anchor or 
drilled hole.

7.  Hold spacer in place with one hand. 

With the other hand, insert mounting 
screw through bottom mounting 
hole and spacer. Place tip of screw in 
opening of wall anchor or drilled hole.

8.  Tighten both screws until heater is 

firmly secured to wall. Do not over 
tighten.

Note:

 Do not re-place front panel at 

this time. 

9.  Replace front panel after making gas 

connections and checking for leaks.

Floor Mounting Away From Wall

Installing Support Feet (See Figure 11):
1.  Lay heater onto table on its back with 

bottom edge overhanging table edge.

2.  Securely attach feet to bottom of 

heater using 2 – self-tapping screws 
each.

Note:

 Feet should have long end going 

out the front of heater, and the edge 
coinciding with side of heater. If feet 
overhang side of the heater, switch leg 
location.

3.  Place heater on non-combustible 

surface (see Locating Heater, page 
6) before proceeding with gas 
connection. If this will be a permanent 
location, heater may be locked into 
position using anchoring holes in 
mounting feet.

Note:

 Use of floor mounting feet will 

require you to use a 3/8 NPT street 
elbow to make gas connection.

INST

ALLATION

Summary of Contents for MHVFRD20NG

Page 1: ...r 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 Do not touch any electrical switch do not use any phon...

Page 2: ...erating the heater Installation and repair should be done by a qualified service person The appliance should be inspected before use and at least annually by a professional service person More frequen...

Page 3: ...air If heater keeps shutting off it requires servicing 5 Turn off and let cool before servicing Only a qualified service person should service and repair heater 6 Do not run heater Where flammable liq...

Page 4: ...plied to heater for shipment 3 Check heater for any shipping damage If heater is damaged promptly inform dealer where you bought heater FRESH AIR FOR COMBUSTION AND VENTILATION Establishing Adequate V...

Page 5: ...ect vent draws combustion air from the outdoors and vents to the outdoors Example Gas water heater 40 000 Btu hr Vent Free Heater 20 000 Btu hr Total 60 000 Btu hr 4 Compare the maximum Btu hr the spa...

Page 6: ...to Natural Gas Equipment shutoff valve Ground joint union Test gauge connection Sediment trap Tee joint Pipe wrench A CSA AGA certified equipment shutoff valve with 1 8 NPT tap is an acceptable altern...

Page 7: ...of heater See Figure 9 2 Place heater onto mounting bracket Slide horizontal slots onto stand out tabs on mounting bracket Installing Bottom Mounting Screws 1 Locate two bottom mounting holes These ho...

Page 8: ...odes WARNING This appliance requires a 3 8 NPT National Pipe Thread inlet connection to the pressure regulator Use of floor mounting feet will require you to use a 3 8 NPT street elbow to make gas con...

Page 9: ...one in your building Figure 13 Figure 14 Equipment Shutoff Valve Open Closed To gas meter Control Valve Equipment Shutoff Valve Immediately call you gas supplier from a neighbor s phone Follow the gas...

Page 10: ...gandproperty damage WARNING Turn off heater and let cool before servicing CAUTION You must keep control areas burner and circulation air passageways of heater clean Inspect these areas of heater befor...

Page 11: ...company b Clean ODS pilot see Cleaning and Maintenance page 10 9 Thermocouple damaged 9 Replace thermocouple 10 Control Valve damaged 10 Replace control valve REMEDY SYMPTOM Burner does not light afte...

Page 12: ...ice is clogged 2 Clean burner orifice see Cleaning and Maintenance on page 10 or replace burner orifice 1 When heated vapors from furniture polish wax carpet cleaners etc turn into white powder residu...

Page 13: ...nd remove foreign matter 2 Gas leak See WARNING statement at top of page 11 2 Locate and correct all leaks see Checking Gas Connections page 8 REMEDY SYMPTOM SYMPTOM Heater shuts off in use ODS operat...

Page 14: ...Regulator Mounting Bracket 1 9 80009 06 Orifice 1 10 80172 Selector Valve Adapter 2 11 80173 Aluminum Valve 1 12 80171 Valve Bracket 1 Item Part No Description 13 80058 Floor Mounting Feet Beige 1 802...

Page 15: ...Front Panel Beige 1 80208 Front Panel White 1 3 80023 Reflector 1 4 80057 ODS Assembly w Thermocouple NG 1 5 80109 Burner Assembly 1 6 80082 Regulator 1 7 NA Regulator Connection 1 8 80055 Regulator M...

Page 16: ...M 5 00 PM EST Monday through Friday Please include the model number date of purchase and description of problem in all communication LIMITED WARRANTY Mr Heater Inc warrants its heaters and accessories...

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