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)
This unit has a grey remote, 1 bottom fan for
the flame effect and 2 top circulation fans

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: Please Call
Customer Service
1-877-467-8643

A
Remove Center From The Wood Mantle
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
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
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
With the center removed from the mantle, lower the front grill to gain access to the power
switch/fuse/reset button 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
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
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
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
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 to wiggle 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 (bottom flame effect fan).
Screws
AC Case Fan
Drive Rod
Drive Rod Motor
Bulb Sockets

E
Remove Heat Tubes
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
You are able to inspect the elements to see which one needs to be replaced. 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.
Make sure the nut that secures the wire to the element is tightened securely.

F
Replace High Limit Switch (120c)
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
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
Once the heat exchange box is free, flip it over so that the black mounting plate is facing up.
Remove the 2 bolts from the fan that is 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 secure that 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. Slightly bend each prong on the switch to 90° in order for it to fit properly.
(bend to look like the one you removed).
Insulator Plate Screws
Mica Insulator Plate

G
Replace Flame Effect On/Off Switch
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
Remove the 4 screws that hold the power switch/fuse/reset button 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)
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
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)
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
Remove the 4 screws that hold the power switch/fuse/reset button panel in place.
Mark the wires so that you know which way they reattach. Hold the master reset breaker
from the back as you loosen the threaded securing nut from the front (See Below).
Securing Nut