WSK-MLT MULTIFUNCTION WALL SWITCH
- INSTALLATION AND OPERATING INSTRUCTIONS -
Introduction
CONTROL
WIRE
The WSK-MLT multifunctional wall switch is designed to
control flame height, blower speed, and auxiliary functions
on your gas fireplace. For models equipped with the
Intellifire system (IPI), the cold climate function can control
the pilot flame as well. The wall switch is equipped with
thermostat functions which can automatically control the
temperature in the room in which it is installed. The wall
switch interfaces with both intermittent and standing pilot
systems. An auxiliary function provides 110-120 VAC
source for added features the fireplace may have installed.
Electrical ratings for the control box are 110 VAC, 60 Hz,
and is required for operation of this device.
WALL SWITCH
FLAME
SOLENOID
COVER
PLATE
Installation precautions
This remote is tested and safe when installed in accordance
with this installation manual. It is your responsibility to
read all instructions before starting installation and to
follow these instructions carefully during installation. Do
not install any components that may be damaged. Do not
modify, disassemble, or substitute any of the components
included with this kit. Installation of this unit must be done
by a qualified service technician.
CONTROL
BOX
Figure 1.
1.0 Installation instructions
1.1 Determine location
Placement of this wall switch may affect performance
or accuracy of the automatic (thermostat) control. An
assessment of the space should be done prior to installation
for optimal performance. See the installation instructions
section I for recommendations.
Determine the location for the wall switch. The chosen
location should provide an accessible location in the
same space as the gas fireplace. Never place this unit in
a separate room. The control wire supplied with this switch
is 33 ft (10M) in length. The distance from the fireplace to
the switch may be lengthened provided that the wire used
never exceeds 50 ft, and that the distance from the fireplace
to the switch never exceeds 30 ft.
NOTE: The electrical junction box provided with the fireplace
must be wired with 110 VAC before installing this kit. See
owners manual for details.
The switch should be mounted into a listed electrical junc-
tion box. The junction box should be dedicated to this wall
switch. Never install this wall switch into a junction box
that is shared with other electrical service or devices. If
possible, install this unit on an interior wall of the residence
at a recommended height of 5 ft from the flooring. Should
the switch be installed on an exterior wall, be certain wall
insulation is kept intact and not damaged or dislodged dur-
ing the installation of the electrical junction box.
All wiring should be done by a qualified electrician and
shall be in compliance with local codes and with the
National Electric Code ANSI/NFGA No. 70- current (in the
United States), or with the current CSA C22.1 CANADIAN
ELECTRIC CODE (in Canada).
WARNING
Shock Hazard
For exterior wall installations, it is recommended that the
junction box be sealed with caulking material. This will
minimize heat loss through this location and improve the
accuracy of the automatic (thermostat) operation.
Do not provide any power to this unit until all
wiring is completed. Failure to do so may destroy
parts of this device and render it unusable, and
may lead to possible electrical shock.
Fire Hazard
Modification of any parts or installation of
damaged components will void the warranty,
and you may possibly cause a fire hazard.
Copyright 2007
Hearth & Home Technologies Inc.
20802 Kensington Blvd., Lakeville, MN 55044
130-911G 12/07
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1.3 Installing the control box
For units WITHOUT factory installed rocker switch.
CAUTION
Standing Pilot Ignition:
Find these parts packed with WSK-MLT:
• Rocker switch
• Do NOT install the control box when fireplace is hot.
• Do NOT plug control box in until all connections are
complete.
• Rocker switch bracket
• Strips of Velcro
1. Place control box into the base pan area of the fireplace.
Place unit as close to the louvers or decorative front as
possible and to either the left or right side.
• Black and white wire pigtails - (2)
• Female ends (only used on Standing Pilot
applications) - (2)
2. Connect the red, yellow or white, and green wires to the
appropriate labeled terminals on the control box.
Cut male ends off black wires on each pigtail. Strip each
end of wire approximately 1/4 inch. Slide each stripped
wire into a female end and crimp. Slide rocker switch into
bracket until it snaps into place. Attach end of each pigtail
to each side of rocker switch. Find the top (brown) and
bottom (red) wires from the control box and attach to white
wires from rocker switch.Attach one black wire to the TH/TP
side of gas valve and the other to the TH side of the gas
valve. Attach the Velcro to the bottom of the rocker switch
bracket and mount in a convenient location next to gas
valve. (Refer to Figure 4).
For units WITH factory installed rocker switch.
3. Find the red and brown pigtail wire (labeled “ FOR USE
WITH REMOTE OR WALL SWITCH ONLY”) which are
attached to the fireplace ON/OFF rocker switch.
Standing Pilot Ignition: Connect these wires with the
red and brown wires extending from control box (Fig 2).
Intellifire (IPI): Connect these wires with the brown
wires extending from the control box (see Figure 3).
For units WITHOUT factory installed Rocker Switch
YELLOW
BLACK
VALVE
WHITE
RED
REAR VIEW
GREEN
To
RED
NOT
Thermopile
USED
BLACK
G W* R
BROWN
BROWN
RED
NOT
USED
BLACK
WHITE
WHITE
RED
RED
FRONT VIEW
FLAME
BLACK
SOLENOID
ORANGE
ORANGE
SWITCH AND WIRE
ASSEMBLY SUPPLIED
WITH WSK-MLT
FLAME HIGH/LOW
FACTORY
CONNECTED
TOGETHER
BLACK
YELLOW
YELLOW
AC PLUG
FAN THERMOSTAT
BLACK
AUX
CONNECTION
* May be labeled as “W” or “Y”.
FAN
CONNECTION
GROUND PIGTAIL
GREEN
BLACK
Figure 4. Standing Pilot Wiring Diagram
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For units WITHOUT factory installed Rocker Switch
BLACK
BATTERIES
SWITCH AND WIRE
ASSEMBLY
SUPPLIED
WITH WSK-MLT
WHITE
BROWN
YELLOW
or
BLACK RED
GREEN
ORANGE
WHITE
RED
REAR VIEW
GROUND
BLACK
GREEN
IPI
VALVE
1
2
G
W*
R
IPI
MODULE
3
4
5
6
7
8
BROWN
BROWN
RED
3V DC
FLAME
BLACK
SOLENOID
FRONT VIEW
RED
RED
FLAME ON
ORANGE
ORANGE
FLAME HIGH/LOW
YELLOW
YELLOW
FACTORY
CONNECTED
TOGETHER
AC
PLUG
ADAPTER WIRES
BLACK
FAN THERMOSTAT
BLACK
AUX
CONNECTION
GROUND
FAN
CONNECTION
PIGTAIL
GREEN
* May be labeled as “W” or “Y”.
BLACK
Figure 5. Intellifire (IPI) Wiring Diagram
Intellifire (IPI):
4. If equipped with a fan, plug the fan cord into the power
cord labeled “FAN”. Disconnect the two wires from the
fan thermostat switch on the fireplace. Disconnect the
two yellow wires from each other and connect them to
the fan thermostat switch. Use one of the existing wires
on the thermostat to connect to the proper end on the
male terminated yellow wire.
Find these parts packed with WSK-MLT:
• Rocker switch
• Rocker switch bracket
• Strips of Velcro
• Black and white wire pigtails - (2)
• Female ends (not used on IPI applications) - (2)
Slide rocker switch into bracket until it snaps into place.
Attach one pigtail to one side of rocker switch and the other
pigtail to the other side of the rocker switch. Find the two
brown wires from IPI module and attach them to the two
black wires from the rocker switch. Find the two brown
wires from the control box and attach them to the white
wires from the rocker switch. Attach the Velcro to rocker
switch bracket and place rocker switch next to control box.
(Refer to Figure 5).
Note: The fan rheostat has now been removed from the
circuit and is inoperable. Use the wall switch to change fan
speeds. The fan temperature sensor is still operable and
will turn the fan on and off when the fireplace heats up and
cools down.
5. Remove the screw and knob from the variable regulator
and discard.
6. Unscrew the nut from the regulator and discard.
Proceed to Step 4.
7. Remove the bag containing a washer and blue and red
plungers from the side of the flame control solenoid.
8. Place washer on flame control solenoid (see Figure 6).
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GAS CONTROL
VALVE
KNOB
SCREW
NUT
VARIABLE REGULATOR
WASHER
WASHER
VARIABLE
REGULATOR
SOLENOID
VARIABLE
REGULATOR
JAM NUT
FLAME CONTROL
SOLENOID
PLUNGER
Figure 6.
9. Insert the correct plunger (blue - natural gas, red - pro-
Intellifire (ipi) models only
pane) into the flame control solenoid (see Figure 6).
For units with factory installed rocker switch see Fig. 3.
10. Thread the flame control solenoid with correct plunger
into the thread hole in the variable regulator. Turn into
valve approximately two full turns. Do not tighten or
damage may occur.
For units without factory installed rocker switch see
Fig. 5.
14. Disconnect main valve wire (green) from the front of
the valve. Connect red control wire to red adapter wire
containing one large male end and one small female
end and connect to valve terminal (see Figure 3).
Connect the other red control wire to red adapter wire
containing one large female end and one small male
end and connect the green module wire (previously
disconnected from valve front).
11. Set the valve manifold pressure to the proper setpoint.
The setpoint is adjusted by rotating the solenoid to
adjust its depth into the valve. Using a manometer
to monitor pressure, rotate the solenoid so that the
output is set to proper range.
12. Tighten the jam nut on the threaded shaft of the
solenoid against the valve regulator. Use an open-
ended ½” wrench to tighten the nut, while holding
the solenoid in the proper position. This step will en-
sure that the solenoid remains locked into the proper
position.
15. Carefully unplug battery pack wires from IPI module.
Plug battery pack into red and black battery wires
(labeled “Battery”).
16. Plug red and black wires from control box (labeled
“3V DC”) to the red and black wires extending from IPI
module (labeled “3V DC”). Red connects to red, black
connects to black.
13. Connect orange wires from control box to the flame
control solenoid.
14. Ground the control box by attaching the green ground
wire (has round ring-terminal on end) to the fireplace
base pan or appropriate ground.
NOTE: Transformer supplied with the IPI system is NOT
used. Disconnect the transformer from the electrical junction
box. Transformer may be removed from the fireplace, but we
recommend leaving it connected to the IPI module.
CAUTION
Lay the control box and wires flat on the base pan to avoid
potential overheating problems.
13. Connect auxiliary functions. This unit is equipped with
a 110 VAC supply cord (labeled “AUX”) for controlling
auxiliary functions such as an electric ember bed.
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• Once pressure is achieved spin jam-nut on solenoid stem
tight against regulator face to prevent rotation. Do not
overtighten.
2.0 Operating Instructions
For units WITH factory installed rocker switch.
The ON/OFF rocker switch on the fireplace (located near
the gas valve) must be in the “OFF” position for use with
the WSK-MLT system. The ON/OFF rocker switch will NOT
function with this device on Intellifire (IPI) models except
during a power outage.
• Press flame button twice to turn fireplace off.
• Remove manometer tube and tighten or close pressure
tap. Use a soap solution to carefully check the pressure
tap for leaks.
For units WITHOUT factory installed rocker switch.
The ON/OFF rocker switch now installed on the fireplace
must be in the OFF position for use with the IPI or stand-
ing pilot system. The ON/OFF rocker switch will only be
used to control the fireplace in a no-power condition. For
standing pilot systems use the rocker switch to turn the
fireplace on and off. When power is restored switch the
rocker switch to OFF. For IPI system refer to “Operation
Under Battery Power” for instructions.
2.2 Wall Switch Button Operation
(Refer to Figure 7)
Flame Button
• Button Press: Unit On / Flames High, Turns on auxiliary
power
• Button Press: Flames Low
• Button Press: Unit Off / Flames Off, Turns off auxiliary
power
After all connections are made and the control box is
grounded, plug power cord into the fireplace junction box.
The wall switch will be functional at this time.
Fan / Blower Button
• Button Press: Fan High (“3”)
• Button Press: Fan Medium (“2”)
• Button Press: Fan Low (“1”)
• Button Press: Fan Off
NOTE: The temperature displayed by the wall switch may
take up to 30 minutes to stabilize on initial power-up.
NOTE: Check control box and assure switch is in the “OFF”
position. This switch is only used on Intellifire (IPI) control
systems under battery operation.
Temperature Button
• Button Press will toggle between Automatic and Manual
Operation
• Press and Hold the button for 3 seconds to toggle between
Fahrenheit and Centigrade Temperature Display.
Automatic Operation: Controller will monitor temperature
and control unit according to the set point.
Manual Operation: Controller will not automatically change
settings.
SET Set Temperature Button
• Button Press: Displays Set Point
• Use Up and Down Arrows to Adjust Set Point
• Press Set Button to Store New Set Point
Temperature Set Point can be adjusted between the ranges of:
45-900 Fahrenheit or 7-320 Centigrade
Figure 7.
NOTE: The controller will turn off the fireplace at 20 F over
set point and turn it back on at 20 F below set point.
2.1 Setting Flame Height/manifold pressure
(To be done by a qualified service technician). Upon initial
power-up of this device, valve pressure must be set for
flame adjustment.
Up and Down Arrows
• Push to adjust set point temperature under automatic
control.
• Loosen output pressure tap on valve and connect with
pressure manometer.
AUX Auxiliary Button
• Press flame button once (Fig. 7); fireplace will light with
flames on high.
• Button Press: Turns on auxiliary power
• Button Press: Turns off auxiliary power
Can be operated independently of all functions.
• Turn solenoid clockwise to increase pressure, counter-
clockwise to decrease pressure until manifold pressure
on high is 3.5” water column for natural gas (NG), 10.0”
water column for propane (LP).
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Child Proof Mode
To Enter Child Proof Mode:
• Press the UpArrow Button twice and DownArrow Button
once. The unit will send out 3 beeps and an indicator in
the LCD panel will show that the child proof is on.
BATTERY
OPERATION
SWITCH
To Leave Child Proof Mode:
CONTROL
BOX
• Press the UpArrow Button twice and DownArrow Button
once. The unit will send out 3 beeps and the indicator in
the LCD panel that shows that the child proof is on will
disappear.
“OFF”
POSITION
“BATTERY ON”
POSITION
NOTE: When in Child Proof Mode, only the arrow buttons
will have functionality. Unit can enter Child Proof when the
fireplace is on or off.
Figure 8
SERVICE PARTS LIST
INTELLIFIRE (IPI) MODELS ONLY
Cold Climate Button
DESCRIPTION
SOLENOID
SERVICE PART NO.
HTI-17-006
• Button Press: Turns on Climate Control
• Button Press: Turns off Climate Control
WALL SWITCH/KEY PAD
CONTROL WIRE
COVER PLATE
HTI-12-007
HTII-23-007
HTI-21-007
This allows the pilot flame to stay lit when activated, a ben-
efit of this is reduced condensation on the glass at start-up
in colder climate conditions.
CONTROL BOX
ACTUATOR PINS
SWITCH KIT
HTI-13-007
HTI-17-116
HTI-25-007
Operation Under Battery Power
A switch on the control box allows for battery power under
no-power conditions (see Figure 8). By controlling the
power supply with this switch, the batteries are supplying
power only when needed, thus extending battery life. The
switch also provides a convenient means for switching to
battery power should there be a loss of 110 VAC power to
the control box.
• In the event of a power failure, switch the battery
operation switch to the “Battery ON” position.
• The fireplace can now be turned on and off with the ON/
OFF rocker switch located near the gas valve.
• The wall switch functions will not operate under battery
power.
• Under battery control the only available function is flame
“On” and “Off” in the high position.
• To maximize battery life, and to restore full function
capability of the wall switch, flip switch to “OFF” position
after 120 VAC power is restored.
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