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Sunheat F-15 Gen IV Repair Manual
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Sunheat F-15 Gen IV Repair Manual

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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

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Summary of Contents for Sunheat F-15 Gen IV

  • Page 1 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.
  • Page 2 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.
  • Page 3 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.
  • Page 4 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.
  • Page 5 Remove the 11 perimeter screws that hold the center top cap in place. Perimeter Screws Perimeter Screws Perimeter Screws...
  • Page 6 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.
  • Page 7 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.
  • Page 8 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. “U” Clip Slide the glass up and out from the guide channel.
  • Page 9 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).
  • Page 10 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.
  • Page 11 Remove the 6 screws that hold the fire light screen into the fireplace (See Screw Locations Below). Screws Removing the fire light screen will give access to the fire light drive rod, drive rod motor and the AC case fan. AC Case Fan Drive Rod Drive Rod Motor...
  • Page 12 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.
  • Page 13 After removing the heat tube access plate, slide the malfunctioning heat tube out of the heat exchanger.
  • Page 14 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...
  • Page 15 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. Mounting Plate High Limit Switch After removing the 2 bolts, flip the exchanger box over so the black mounting plate is lying on the bottom.
  • Page 16 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).
  • Page 17 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).
  • Page 18 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.
  • Page 19 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.
  • Page 20 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...
  • Page 21 Replace Circulation Fans (Top Fans) To gain access to the circulation fans, the heat exchanger must be removed from the fireplace. Remove the 4 anchor screws that hold the heat exchanger assembly in place (See Screw Locations Below). Anchor Screws Anchor Screws Heat Exchanger Box...
  • Page 22 Flip the exchanger box over so that the black mounting plate is facing up. Remove the 4 bolts from the defective fan. Mounting Plate After Removing the 4 bolts, flip the exchanger box over so the black mounting plate is lying on the bottom. Remove the 4 nuts that are holding the fan in place.
  • Page 23 Replace Tip Over Switch The Tip Over Switch is located to the right of the Heat Exchanger Box. Remove the wires from the tip over switch. NOTE: Mark the wires so you know the order to reattach to the correct location. Tip Over Switch After removing the wires from the tip over switch turn the fireplace around so that you are facing the rear.
  • Page 24 Replace Power Routing Board The Power Routing Board is located to the right of the Heat Exchanger Box & to the rear of the main circuit board. Remove the Fan Power plugs and the main Power Supply to the board (See Locations Below). Fan Power Plugs Power Supply Using a 7/32 nutdriver, remove the 4 nuts that hold the power routing board...
  • Page 25 Replace Circuit Board The Circuit Board is located to the right of the Heat Exchanger Box and square in shape. Remove the Circuit Board by removing the 4 screws that hold it in place. These screws are located on all four corners of the board. NOTE: Keep wires attached to old board Put the new board in place.
  • Page 26 Replace Display Screen Remove the 4 screws holding the access panel in place and unplug Display Screen from the Circuit Board. Remove the 4 screws that hold the function display screen into place on the front cover. Remove the display screen through the front of the cover.
  • Page 27 Replace Air Temperature Sensor The air temperature sensor is located on the bottom right hand side of the fireplace. Unplug from the circuit board and pull the wire through the guide channel. Replace with new temperature sensor and make sure it is plugged in to circuit board.
  • Page 28 Replace Flame Effect Light Bulb Socket There are 2 light sockets located behind the lower access panel. Hold the base of the light socket with one hand while unscrewing the anchor ring. Remove the light socket from its metal bracket and trace the wire back to its connection location. Lower Access Panel AC Case Fan Drive Rod...
  • Page 29 Replace AC Case Fan (Bottom Fan) To gain access to the AC Case Fan follow steps (A), (B), (C) & (D). After gaining clear access to the AC Case Fan, hold each one of the 4 lock nuts in place with a 7mm wrench.
  • Page 30 Replace Fire Light Drive Rod Motor To gain access to the drive rod motor, follow steps (A), (B), (C) & (D). After gaining clear access to the fire light drive rod motor, manually rotate the drive rod counterclockwise to gain access to the Cotter Key that holds the drive rod collar onto the drive rod motor.
  • Page 31 After removal of the nuts & screws that hold the Drive Rod Motor bracket in place, rotate the Drive Rod Motor assembly to gain access to the wiring. Clip the wire tie that holds the wires together. NOTE: Take Care Not To Clip The Wires Drive Rod Motor Assembly After manipulation of the drive rod motor &...
  • Page 32 Replace Power Cord Remove the 2 black power leads. 1 wire is attached to the bottom terminal of the Tip Over Switch. The other is attached to the “ACL” screw terminal on the circuit board. (Both wires are black and universal. It will not matter which goes to which location) Power Cord Leads Tip Over Switch...
  • Page 33 Once the glass and screen are removed, use a 7mm wrench to hold the lock nut that holds the ground wire in place from the underside of the metal case. Use a 3mm Allan wrench to loosen the screw the runs through the ground wire & metal panel.
  • Page 34 Replace Center Mounting Anchors To gain clear access to the 4 center mounting anchors, follow steps (A), (B), (C) & (D). Using two sets of pliers, hold the mounting anchor from the inside of the fireplace metal case. Loosen the mounting anchor from the back side of the fireplace case (See Below).

  • Page 35: Wiring Diagram

    WIRING DIAGRAM...
  • Page 36 WIRING DIAGRAM...