Qmark QFG User Manual

G Series

Fan Forced Wall Heaters

US Patent No. 6,172,343

Dear Owner,
Congratulations! Thank you for purchasing this new heater manufactured by Marley Engineered Products. You have made

a wise investment selecting the highest quality product in the heating industry. Please carefully read the installation and
maintenance instructions shown in this manual. You should enjoy years of efficient heating comfort with this product from
Marley Engineered Products... the industry’s leader in design, manufacturing, quality, and service.

... The Employees of Marley Engineered Products

Read Carefully - These instructions are written to help you

prevent difficulties that might arise during installation of
heaters. Studying the instructions first may save you consid­erable time and money later. Observe the following proce­dures, and cut your installation time to a minimum.

CAUTION - TO REDUCE RISK OF FIRE AND ELECTRIC
SHOCK:

1. Disconnect all power coming to heater at main service panel
before wiring or servicing.

2. All wiring must be in accordance with the National and Local
Electrical Codes and the heater must be grounded.

3. Verify the power supply voltage coming to heater matches the
ratings printed on the heater nameplate before energizing.

4. This heater is hot when in use. To avoid burns, do not let bare
skin touch hot surfaces.

5. Do not insert or allow foreign objects to enter any ventilation or
exhaust opening as this may cause an electric shock, fire, or
damage to the heater.

6. Do not block air intakes or exhaust in any manner. Keep com­bustible materials, such as crates, drapes, etc., away from
heater. Do not install behind doors, furniture, towels, or
boxes.

7. A heater has hot and arcing or sparking parts inside. Do not use
it in areas where gasoline, paint, or flammable liquids are used
or stored.

8. Use this heater only as described in this manual. Any other use
not recommended by the manufacturer may cause fire, electric
shock, or injury to persons.

9. This heater is not approved for use in corrosive atmospheres
such as marine, green house, or chemical storage areas.

10. Heater must only be installed in a horizontal direction (motor &
thermostat to right) as shown in this manual. Do not install side­ways or upside down.

11. Heater must be installed with Back Box.

12. For wall mounting only. The following minimum clearances must
be maintained: Heater to floor - 4 in. (102 mm); Heater to any
adjacent wall - 6 in. (152 mm); Heater to ceiling - 36 in. (915 mm).

13. When wiring, power supply must enter through knockouts in
right end of back box. Do not use the knockouts in left end of
back box.

14. Do not operate heater without grille installed.

15. Do not use heater for dry out. Paint, plaster, sawdust, and dry­wall sanding dust will damage heater and must be kept out of
heater.

16. Grille and discharge air are hot when in use. Do not install or
use heater in any area where the airflow from heater may be
obstructed. Hot air may damage certain fabrics and plastics.
Always keep electrical cords, bedding, furniture, and other com­bustibles away from heater.

Installation & Maintenance Instructions

SAVE THESE INSTRUCTIONS

FILE #E21609

16-7/8”

(429mm)

14-3/8”

(365mm)

7-3/4”

(197mm)

10-5/8”

(270mm)

6-5/8”

(168mm)

4-3/8”

(111mm)

(BACK)

2-1/2”

(64mm)

1-1/16”

(27mm)

NOTE: Knockouts in
top - same dimensions
as bottom

1-1/2”
38mm

7/8”

(22mm)

1-3/16

(30mm)

BOTTOM VIEW (BACK)

WARNING

!

FRONT VIEW

SIDE VIEW

BOTTOM VIEW

The “G” Series heaters are designed for recessed installation in standard
2 x 4 (50mm X 100mm) or larger stud walls with the back box mounted
as shown in either Fig. 1, or Fig. 2.

NOTE: Heater should be controlled by either built-in thermostat or remote
wall thermostat.

This heater may be wired with standard building wiring (rated minimum
60° C). Refer to Table 3 for appropriate wire size for the heater to be
used.

TO INSTALL BACK BOX (Model RBB)

IN NEW CONSTRUCTION - WALL STUDS 16” OC.

(REFER TO FIG. 1)

NOTE: Please review warning 12 on page 1.

1. Locate back box (model RBB) and back box support brackets (2).
Back box must be installed with mounting rails to the top (see Fig.
1B).

2. Install back box support brackets with foot tabs directed towards the
center of the back box as shown in Fig. 1A and 1B. It may be nec­essary to bend up slightly the tab on the back box support bracket
to allow insertion under the mounting lances on the bottom of the
back box.

3. Determine which knockout in back box will be used for field wiring
and remove (see back box drawing pg.1). Install strain relief (field
supplied). See warning No. 13.

4. Fish field wiring through strain relief leaving 6” of wire inside box.

5. Insert back box assembly into wall. The front of the back box should
be flush with the finished wall surface or it may protrude slightly. The
back box should never be recessed into the wall. (see Fig. 1C). The
back box support brackets should be resting on the sole plate of the
stud wall to insure proper spacing and leveling (see Fig. 1B).

6. Using four (4) wood screws or drywall screws or four (4) nails (field
supplied), secure back box to studs (see Fig. 1B). Back box support
brackets can now be removed. If not removed, secure to sole plate.

TO INSTALL BACK BOX IN NEW CONSTRUCTION -

WALL STUDS SPACING GREATER THAN 16” OC.

(REFER TO FIG. 2)

NOTE: Please review warning 12 on page 1.
NOTE: Fig. 2 depicts the back box installed with the left side adjoining

stud. For a box with the right side adjoining a stud, reverse the directions
shown below.

1. Locate back box and back box support brackets (2). Back box must
be installed with mounting rails to the top (see Fig. 2B)

2. Determine which side of the back box will adjoin stud and insert back
box support bracket on that side with foot tab directed towards cen­ter of back box. On the side of the back box that will not adjoin stud,
install back box support bracket on that side with foot tab directed
towards end of box and secure to box with 3/8” long sheet metal
screw (provided).

3. Determine which knockout in back box will be used for field wiring
and remove (see back box drawing pg. 1). Install strain relief (field
supplied).

4. Fish field wiring through strain relief leaving 6” of wire inside box.

5. Insert back box assembly into wall. The front of the back box should
be flush with the finished wall surface or it may protrude slightly. The
back box should never be recessed into the wall. (see Fig. 2). The
back box support brackets should be resting on the sole plate of the
stud wall to insure proper spacing and leveling (see Fig. 2B).

6. Use two (2) wood screws or drywall screws or two (2) nails (field
supplied) to secure the side of the back box that adjoins a stud. Use
one (1) wood screw or drywall screw or one (1) nail (field supplied)
to secure the foot tab of the back box support bracket (that is on the
end opposite the stud) to the sole plate (see Fig. 2B).

TO INSTALL BACK BOX IN
EXISTING CONSTRUCTION

NOTE: Please review warning 12 on page 1.

1. Locate wall studs to be sure that entire cut-out can be made
between studs. At least one side of the cut-out must be flush with
side of the stud. Bottom of cut-out must be 4” above finished floor
minimum. Make a cut-out in wall 14-1/2” wide X 6-3/4” high (368mm
X 171mm) (see Fig. 3).

2. Determine which knockout in back box will be used for field wiring
and remove (see back box drawing, pg.1). Install strain relief (field
supplied).

3. Fish field wiring through strain relief leaving 6” of wire inside box.

4. Insert back box into cut-out. The front of the back box should be
flush with the finished wall surface or it may protrude slightly. The
back box should never be recessed into the wall. (see Fig. 1C or
2C).

2

Figure 1A

Figure 1B

Figure 1C

Figure 2A

Figure 2B

Figure 3

CORRECT

CORRECT

INCORRECT

Figure 2C

CORRECT

CORRECT

INCORRECT

The “IF” models do not include a backbox. The Backbox is
ordered separately. In the parts bag for “IF” models, there is a
white label that indicates multiple wattage and must be place
in the backbox on the bottom right-hand side. When making
wattage changes, the installer must circle the wattage on the
white label before installing the heat deck.

NOTE TO INSTALLER

STUD

BACK BOX

TOP VIEW

INSERT FAN DECK

THIS SIDE

DRY WALL

STUD

INSERT FAN DECK

BACK BOX

TOP VIEW

THIS SIDE

BACK BOX (FRONT VIEW)

MOUNTING RAILS

STUD

NAIL OR SCREW

4 PLACES

SUPPORT BKTS.

SOLE PLATE

STUD

INSERT FAN DECK

DRY WALL

BACK BOX

BACK BOX

TOP VIEW

THIS SIDE

STUD

DRY WALL

STUD

INSERT FAN DECK

BACK BOX

TOP VIEW

DRY WALL

THIS SIDE

STUD

BACK BOX

TOP VIEW

INSERT FAN DECK

THIS SIDE

STUD

DRY WALL

BACK BOX (FRONT VIEW)

MOUNTING RAILS

NAIL OR SCREW

BACK BOX

SUPPORT BKTS.

SOLE PLATE

STUD

BACK BOX

TOP VIEW

INSERT FAN DECK

THIS SIDE

DRY WALL

STUD

NAIL OR SCREW