Sun Heat F-15 Gen IV Assembly instructions

F-15 Gen IV Fireplace
Repair Guide
!! Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
A. Remove Center From The Wood Mantle
B. Remove Center Top Cap
C. Remove Front Glass
D. Remove Fire Log Set & Firelight Screen
E. Replace Heat Tubes
F. Replace High Limit Switch (120c)
G. Replace Flame Effect On/Off Switch
H. Replace Flame Effect Fuse (1 amp)
I. Replace Master Reset Breaker (16 amp)
J. Replace Heat Exchanger Circulation Fans (12 volt)
K. Replace Tip Over Switch

L. Replace Power Routing Board
M. Replace Circuit Board
N. Replace Display Screen
O. Replace Air Temperature Sensor
P. Replace Flame Effect Light Bulb Socket
Q. Replace AC Case Fan
R. Replace Fire Light Drive Rod Motor
S. Replace Power Cord
T. Replace Center Mounting Anchors
U. Wiring Diagram
Questions: Call
Customer Service
1-877-467-8643

A
Remove Center From The Wood Mantle
Unscrew the 4 wing bolts that hold the fireplace center into the wooden mantle
(See Wing Bolt Locations Below). After the removal of the wing bolts, slide the
fireplace center out the front of the mantle. Note: Be careful to protect the lower
lip of the mantle with a piece of cardboard or sheet of heavy plastic. There are
screw heads on the bottom of the metal center that will damage the finish on the
wood if not protected.
Wing Bolts

B
Remove Center Top Cap
With the center removed from the mantle, lower the front grill to gain access to
the (switch/fuse/reset) panel. This panel is located on the left side. Remove the 4
screws that hold this panel in place.
After the removal of the 4 screws that hold this panel in place, tilt the panel at a
slight angle and place into the hole that the panel covers.

B
Remove the 11 perimeter screws that hold the center top cap in place.
Perimeter Screws
Perimeter Screws
Perimeter Screws

B
Lift the top cap upward from the front. NOTE: Be careful not to lift the top cap too
far or damage may occur to the wires that connect the display screen to the circuit
board.
Disconnect the wire harness that runs from the display screen to the circuit board.

C
Remove Glass
You are able to remove the glass without having to completely dismantle the unit.
Loosen the 4 wing bolts that hold the center unit into the wood cabinet and push
the center forward slightly.
You will remove 2 screws on each side of the grill hinge in order to remove the
grill. Remove the 2 screws that hold the metal glass cap down (See Screw
Locations Below).
Remove the 2 screws hold the metal glass cap in place.
metal glass cap

C
Remove the 2 metal “U”clips that hold the glass into its channel. The “U”clips are
located to the left and right under the metal glass cap.
Slide the glass up and out from the guide channel.
“U” Clip

D
Remove Fire Log Set & Fire Light Screen
Remove the 4 screws that hold the fire log set in place. There are 2 screws at each
end of the fire log set. These screws are accessed through holes in the metal case
(See Screw Locations Below).
Screws
Screws

D
Lift the fire log set up at one end. The log set may be wedged into the case. As you
remove, you may have go wiggle it slightly to free it.
NOTE: The log set is made out of fiberglass. Applying excessive force may cause
damage.

D
Remove the 6 screws that hold the fire light screen into the fireplace (See Screw
Locations Below).
Removing the fire light screen will give access to the fire light drive rod, drive rod
motor and the AC case fan.
Screws
AC Case Fan
Drive Rod
Drive Rod Motor
Bulb Sockets

E
Remove Heat Tubes
After determining which of the 3 heat tubes has failed, use a 7mm wrench to
loosen the nuts on each end of the heat tube that holds the power wires in place.
**ALLOW ELEMENTS TO COOL BEFORE REMOVING**
Remove the 2 screws that hold the heat tube access plate in place.
Remove Screws

E
After removing the heat tube access plate, slide the malfunctioning heat tube out
of the heat exchanger.

F
Replace High Limit Switch (120c)
To gain full access to the high limit switch, the heat exchanger assembly needs to
be removed. Remove the 4 anchor screws that hold the heat exchanger assembly
in place (See Screw Locations Below).
Anchor Screws
Anchor Screws

F
Flip the exchanger box over so that the black mounting plate is facing up. Remove
the 2 bolts from the fan closest to the high limit switch.
After removing the 2 bolts, flip the exchanger box over so the black mounting
plate is lying on the bottom. Remove the 2 nuts that are holding the fan in place
and remove the fan.
High Limit Switch
Mounting Plate

F
Using needle nose pliers, hold the nut that holds the high limit switch in place from
the inside of the heat exchanger. Use a screwdriver on the other side to remove
the screw.
After removing the screw & nut, remove the 2 screws that hold the Mica insulator
plate in place (See Screws Locations Below). Once the plate is removed, you will
have access to the High Limit Switch and can then replace with new switch.
Insulator Plate Screws
Mica Insulator Plate

G
Replace Flame Effect On/Off Switch
Remove the 4 screws that hold the (switch/fuse/rest) panel in place.
NOTE: Mark all of the wires so you know the order to reattach to the new switch.
After removing the wires that connect to the switch, use pliers to compress the
tabs that lock the switch into the metal plate (See Below).

G
After compressing the locking tabs on the switch, remove the switch through the
front of the plate (See Below).
NOTE: Be sure to hook the wires back in the correct order. Failing to do so will
result in Switch damage.

H
Replace Flame Effect Fuse (1 amp)
Place a small flat screwdriver under lifting tab.
Carefully lift up fuse holder to gain access to the 1 amp fuse.

I
Replace Master Reset Breaker (16 amps)
Remove the 4 screws that hold the (switch/fuse/reset) panel in place.
Hold the master reset breaker from the back as you loosen the threaded securing
nut from the front (See Below).
Securing Nut