Sun Heat SH1500RC BB Assembly instructions

SH1500RC BB
Repair Guide
The Unit Does Not Turn On
1. Make sure that the power cord is plugged into an
energized outlet.
2. Make sure you have turned the power on by pressing
the on/off button on the front display screen. The
screen will light up if the screen is on.
3.Make sure there are no timers set on the front display
screen.
A. How To Remove The Center Unit From Wooden Cabinet
B. How To Replace The Front Display Screen
C. How To Replace The Power Cord
D. How To Replace The High Limit Switch
E. How To Replace The Temperature Sensor
F. How To Replace The Fan Switch (45c)
G. How To Replace Reset Button
H. How To Replace The Quartz Infrared Heat Tubes
I. How To Replace The 12volt Fan
J. How To Replace The Circuit Board
K. How To Replace The Power Routing Board (PRB)
L. Wiring Diagram
PLEASE CALL CUSTOMER SERVICE
FOR ASSISTANCE:
1-877-467-8643

A
How To Remove The Center From The Wooden
Cabinet
!!Unplug The Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Remove the front display screen by pushing up and pulling out on the bottom. Unplug the
black quick connect.
NOTE: When putting the display screen back, make sure you insert the top first then push the
bottom into place.

A
Remove the 6 screws on the back of the heater. (SEE PHOTO BELOW FOR SCREW
LOCATIONS).
Turn the heater on its side and remove the outer corner screws on each caster mounting bracket.
These screws will be about 1½ inches long (SEE PHOTO BELOW FOR SCREW
LOCATIONS). After removing all of the anchor screws, the center unit will slide out easily.
**You may use the power cord to gently pull the metal center unit out of the wooden cabinet.

B
How To Replace The Front Display Screen
!!Unplug The Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Remove the front display screen by pushing up and pulling out on the bottom. Unplug the
black quick connect. NOTE: When putting the display screen back, make sure you insert the
top first then push the bottom into place.

C
How To Replace The Power Cord
!!Unplug Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Remove all of the screws that hold the right & the left side panels on to the heater. Remove the
6 remaining screws that hold the rear panel in place. There are 3 located on the top panel and 3
on the bottom portion of the back panel (SEE PHOTO BELOW FOR SCREW LOCATION
& PANEL IDENTIFICATION).
Remove the power cord retaining grommet using a pair of pliers. Squeeze the cord strain relief
and pull out it from the back.
NOTE: IT IS RECOMMENDED THAT YOU REMOVE THE QUICK CONNECTS FROM
THE HEATER AND DIRECT WIRE TO THE POWER ROUTING BOARD. PLEASE
REFER TO INSTRUCTIONS ON HOW TO ELIMINATE THE QUICK CONNECTS IF YOU
HAVE THEM.
Quick Connect

C
Disconnect the green ground wire. Install the new power cord and directly attach the two wires
to the circuit board. Reattach the green ground wire.
NOTE: The two black wires to power cord are universal so it doesn’t matter which goes to
which location.
Close up of circuit board and 2 power cord wires attached

D
How To Replace The High Limit Switch
!!Unplug Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Lay the metal unit on its right side (when you are looking at the back of the unit). Remove the
screws on the left side and lift the panel off. You should now see the 3 round copper heat
exchangers, 5 short quartz infrared heat tubes suspended inside of the copper exchangers, 1 long
heating element, and the circulation fan (Fan will be to your right). The High Limit Switch is a
thin black wire with a metal end. To replace the High Limit Switch you will need to unplug it
from the “SP2 PT” terminal on the circuit board. Remove the faulty switch and replace. Make
sure it is plugged back into the correct location (SEE PHOTO BELOW FOR HIGH LIMIT
SWITCH LOCATION).
Heating elements
High Limit Switch
Copper Heat Exchanger
Fan Switch
Fan
Power Routing Board
Circuit Board (not pictured)
High Limit Switch
Temperature Sensor

E
How To Replace The Temperature Sensor
!!Unplug Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
Remove 3 screws from each panel to remove the back panel. There are 3 screws on the top,
bottom, and each side panel. There will be 12 screws total (SEE PHOTO BELOW FOR
SCREW LOCATION & PANEL IDENTIFICATION).

E
NOTE: The Temperature Sensor could be located in 3 different places.
1) Underneath the SUNHEAT temperature sensor cover.
2) Sticking out from a hole in the back panel.
3) Sticking out the side of the back panel.
Unplug the Temperature Sensor from the “SP2 ROOM” terminal on the circuit board. Remove
the faulty sensor and replace. Make sure it is plugged back into the correct location.
Temperature Sensor
High Limit Switch
1
2
3

F
How To Replace The Fan Switch
(Fan Switch will be labeled 45c)
!!Unplug The Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Lay the metal unit on its right side (when you are looking at the back of the unit). Remove the
screws on the left side and lift the panel off. You should now see the 3 round copper heat
exchangers, 5 short quartz infrared heat tubes suspended inside of the copper exchangers, 1 long
heating element, and the circulation fan (Fan will be to your right). The Fan Switch is a black
oval-shaped switch. To replace the Fan Switch you will need to remove the wire leads from the
faulty switch and the 2 screws which hold the switch in place. Remove the faulty switch and
replace with a new one. Remember to replace the wire leads back on the new switch (SEE
PHOTO BELOW FOR FAN SWITCH LOCATION).
Heating elements
High Limit Switch
Copper Heat Exchanger
Fan Switch
Fan
Power Routing Board
Circuit Board (not pictured)

G
How To Replace The Reset Button
!!Unplug Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Remove 3 screws from each panel to remove the back panel. There are 3 screws on top,
bottom, and each side panel. There will be 12 screws total (SEE PHOTO BELOW FOR
SCREW LOCATION & PANEL IDENTIFICATION).

G
Unscrew the reset button from its location and replace with new reset button.
Make sure you place the 2 wires on the reset button correctly.
LINE goes to ACL on circuit board.
LOAD goes to “F” or Fuse on circuit board.
This screws the reset button in place on the outside of the back panel
This goes on the inside of the back panel and will hold the reset button in place
LINE
LOAD

H
How To Replace The Quartz Infrared Heat Tubes
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
Remove both left & right cover panels from the unit. To see exactly which heat tube is burned out you will have
to plug the heater in and turn it on. Wait until the heat tubes start to glow an orange color. The heat tubes are
wired in series of 2 so if one tube burns out, it may cause the heat tube that it is wired with to stop working as
well. After determining which heat tubes are not working shut unit off & unplug. Wait until the unit has cooled
off enough to be worked on. (Keep Track Of How The Wires Are Connected So You Can Reconnect Them
The Same Way Later). From the right side of the unit (Right & left sides are determined when looking at the
unit from the back panel). Find the wires that belong to the heat tubes that are not working. Unscrew the wing
nuts that connect these two lamps together. Then from the left side (The side with the copper ovens) find the
wires that belong to the heat tubes that are not working and unscrew the wing nuts. Remove the screws that hold
the heat tube suspension brackets in place & remove the heat tube. At this point you can inspect the condition of
the heat tubes that you removed to determine which heat tube needs to be replaced. (If unsure of the heat tube
that is burned out go ahead and replace both lamps) Install the new heat tube(s) in the same way you
removed the old ones.
Replace Front (Long) Heat Tube
Both side panels and rear panel need to be removed. The removal of 5 additional screws from the top of the
unit will need to be done as well (See photo below for screw location). After the removal of the side panels,
rear panel and the 5 screws from the top, the entire mainframe can be slid back to allow access to the front heat
tube (See photo on next page). After gaining access to the front heat tube, remove the screws from 1 of the 2
brackets that hold the heat tube in place. Disconnect wires & replace the burned out tube with a new one.
TOP
REAR

H
(Remember That the Edges of the Metal Are Sharp. Use Caution)
You may have to remove the baffle to gain enough clearance to
change the long heat tube in the front.
Support bracket
Heating Element Wing Nuts
This picture shows the wiring connections on the other side for the heating elements

I
How To Replace The 12volt Fan
!!Unplug The Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
Both side panels and rear panel need to be removed for easier access to the fan. The fan has two
wires running out of its housing. The fan wires will plug into the Power Routing Board (Refer
to wiring diagram). Unplug the fan power wires from the PRB. Use a pair of pliers to hold the
locknut and a #2 Phillips screwdriver to loosen the anchor screws that hold the fan into place.
Make sure that when you install the new fan that the label faces towards the front of the heater
(See photo below for fan direction).
NOTE: YOU MAY HAVE TWO FAN TERMINAL PLUGS.
These are universal and will not matter which plug you use.
FAN
LABEL
12 volt DC
Fan Power Wire

J
How To Replace The Circuit Board
!!Unplug The Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
NOTE: IT IS RECOMMENDED THAT YOU REMOVE THE QUICK CONNECTS FROM THE HEATER
AND DIRECT WIRE TO THE POWER ROUTING BOARD. PLEASE REFER TO INSTRUCTIONS ON
HOW TO ELIMINATE THE QUICK CONNECTS IF YOU HAVE THEM.
Remove both left & right access panels from the metal center unit along with the rear panel.
You will need a 5/64 Allen wrench to remove the circuit board. Hold bolts in place with a pair
of pliers while using the wrench to remove the 4 screws that hold the circuit board in place on
the other side. Note: Keep wires attached to old board.
Quick Connect

J
Put new board in place. Disconnect 1 wire at a time from old board and connect it to the
appropriate location on the new board. Rerun Display Wire through to the front of unit.
**If you disconnect all wires at once, please refer to wiring diagram for wire location.
Display wire runs from the back of the unit up
to the front using the 2 holes to guide it.

K
How To Replace The Power Routing Board (PRB)
!!Unplug The Heater Before Servicing!!
(Remember That the Edges of the Metal Are Sharp. Use Caution)
NOTE: IT IS RECOMMENDED THAT YOU REMOVE THE QUICK CONNECTS FROM THE HEATER
AND DIRECT WIRE TO THE POWER ROUTING BOARD. PLEASE REFER TO INSTRUCTIONS ON
HOW TO ELIMINATE THE QUICK CONNECTS IF YOU HAVE THEM.
Remove the four (4) –7/32 nuts that hold the PRB in place. Remove the wires from the
original wire anchor blocks one at a time & install into the wire block anchors on the new PRB.
Note: Keep wires attached to old board.
Use a 1/8th slotted screwdriver or screwdriver bit to secure the wires into the anchor blocks.
When reattaching the wires into the anchor blocks, make sure that the connections are tight.
(Do Not Over Tighten the wire anchor block screws or thread stripping may occur)
**If you disconnect all wires at once, please refer to wiring diagram for wire location.
7/32
Nuts
Quick Connect

L
Wiring Diagram
**THERE ARE 3 DIFFERENT WIRING CONFIGURATIONS FOR THIS MODEL. PLEASE FIND THE
DIAGRAM THAT MATCHES YOUR HEATER.
A.

A. CONTINUED