READ CAREFULLY
tion should be directed to the warnings provided below which identify certain precautions and special instructions for safe and efficient installation and use. Studying these instructions first may save you considerable time and money later and keep your installation time to a minimum. If you are not familiar with electricity or feel uncomfortable in working with electricity, refer the installation of
this product to a licensed electrician or qualified person.
- This manual provides instructions for the correct installation, safe use, and care of this product. Special atten-
WARNING
!
14-3/8"
(365mm)
1-21/32"
(42mm)
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR
INJURY TO PERSONS:
READ ALL INSTRUCTIONS
1.
heater.
ELECTRICAL SHOCK HAZARD:
2.
power coming to heater at circuit breaker box or main
disconnect switch and lock in OFF position before wiring.
All wiring must be in accordance with The National Electrical
Code and applicable local codes and ordinances.
The heater must be properly connected to an effective
building ground.
3. Verify the supply voltage coming to heater is the same as
shown on the heater nameplate before energizing.
Energizing at a voltage in excess of nameplate voltage will
damage heater and void warranty.
4. This heater has hot and arcing or sparking parts inside.
Do not install or use in areas where gasoline, paint, or flammable liquids are used or stored.
5. Do not install this heater upside down, sideways, in ceiling,
or floor. Install only as shown in this manual. Refer to
Mounting Clearances
must be maintained.
6. The heater assembly must be installed in the back box provided. Do not operate the heater without the grille installed.
7. This heater is not approved for use in corrosive
atmospheres such as marine, green house or chemical
storage areas.
, page 2 for minimum clearances that
before installing or using the
Disconnect all electrical
8. Do not use outdoors.
9. Extreme caution is necessary when any heater is used by or
near children or invalids and whenever the heater is left
operating or unattended.
10. This heater is hot when in use. To avoid burns, do not let
bare skin touch hot surfaces. Keep combustible materials,
such as furniture, pillows, bedding, papers, clothes, and
curtains away from heater. Do not block air intakes or
exhaust in any manner. For efficient and safe operation, we
recommend keeping all items at least 3 feet from front of
heater.
11. Do not insert or allow foreign objects to enter any ventilation
or exhaust opening as this may cause an electric shock, fire,
or damage the heater.
12. Should the heater become blocked or otherwise overheat, it
is provided with a manual-reset thermal safety switch and
alarm light that will activate to alert that the heater has
cycled off. If warning light is on, check to see if the reason
for the overheating can be identified. Remove any
blockage, allow heater to cool, then press Reset button.
Heater should return to normal operation. Do not continue
to use heater if it repeatedly cycles off. Have it inspected
and repaired by a qualified repair person.
13. Use this heater only as described in this manual. Any other
use not recommended by the manufacturer may cause fire,
electric shock, or injury to persons.
: NV suffix indicates heater with Navajo White grille, SB suffix indicates
tatuary Bronze grille, example: HTWH4008NV or HTWH4008SB
S
Supply
INSTALLATION
FOR SAFE OPERATION AND REDUCED RISK OF FIRE,
INJURY OR HEATER DAMAGE, OBSERVE THE
FOLLOWING:
1. Do NOT use a remote thermostat with this heater. Built in
thermostat cycles the heating element only. Fan delay control automatically turns fan ON and OFF, and provides a fan
delay OFF feature to remove residual heat after thermostat
has turned heating elements off. Wiring of heater in any
manner which defeats the fan delay OFF feature can result
in overheating and permanent damage to heater, and will
void the warranty.
2. For wall mounting only with air discharge downward. Do
NOT install in floor, ceiling, upside down (air discharge
upward), or sideways.
3. Do NOT operate heater without grille installed.
4. This heater is hot when in use. Do NOT install heater
behind door, behind towel rack, inside closet, where drapery could touch heater or be damaged by heat, or where airflow to heater may be obstructed. Keep electrical cords,
bedding, furniture, and other items away from heater.
5. Heater must be cleaned periodically (at least annually) to
assure proper performance and prevent overheating.
See section on cleaning and maintenance.
The heater is designed for recessed installation in 2” x 4” (50
mm x 101 mm) stud or larger wall sections using the back box
provided. The heater may be wired with standard building wire
(60°C). Refer to “Specifications” and heater nameplate for
correct supply voltage and wire size.
NOTE:
(450 to 600 mm) from floor to bottom of back box. DO NOT
install closer than 12” (305 mm) from the floor.
Mounting Clearances
Wall Mounting Only:
The optimum mounting height for this heater is 18” to 24”
TO PROVIDE FOR SAFE OPERATION, THE FOLLOWING
CLEARANCES MUST BE MAINTAINED.
a. Minimum twelve (12) inches (305 mm) to floor;
b. Minimum twelve (12) inches
(305 mm) to adjacent walls;
c. Minimum thirty six (36) inches
(915 mm) to ceiling.
TO PREVENT HAZARD OF FIRE OR ELECTRICAL SHOCK,
DO NOT INSTALL WITHOUT BACK BOX.
TO PREVENT POSSIBLE DAMAGE TO POWER WIRING,
USE ONLY THE KNOCKOUTS PROVIDED IN BACK BOX.
Mounting Back Box in New Construction (See Figure 1).
NOTE:
tions for “Installation of Back Box in Existing Construction”.
1. Place the back box between two 16" (406 mm) center-to-
Note:
tional framing supports may be necessary.
2. Align back box such that the bottom and sides will be flush
3. Secure the back box in position with wood screws or nails as
4. Run a power supply cable into the knockout area in the
5. Remove disconnect switch bracket by loosening two screws
6. Install a cable clamp in the “knockout” in the top of the back
7. Insert power supply cable through cable clamp, allowing at
NOTE:
sheathed cable (Romex) and the supply voltage is 240 or 208
volts (two power wires), the white wire color must be changed
using black electrical tape to comply with the NEC. White is
only allowed for a Neutral conductor.
8. Connect building ground conductor to the back box using the
9. Secure disconnect switch bracket in place by tightening
If the finished wall surface is already up, follow instruc-
center wall studs at the desired mounting height but no closer than 12" (305 mm) to adjacent wall or floor. .
If wall studs are spaced greater than 16” on center, addi-
with finished wall surface (top flange of back box should protrude approximately 1/2" (12.7 mm) from finished wall surface (You must know the thickness of the finished wall when
installing).
shown in Figure 1.
Ground screw
Back Box
12” Min.
(305 mm)
Cable
clamp
Power supply cable
Lead wires (Blue)
Disconnect switch
bracket with switch
and leads
12” Min.
(305 mm)
Nail or screw (2
each side)
Figure 1: Locating Back Box in New Construction
upper right hand corner of the back box (see Figure 1). All
wiring must be in accordance with National and Local
Electrical Codes. Refer to Specifications for correct wire
size.
on the right side.
box.
least 6" (152mm) of leads to extend inside the back box.
Connect the blue lead wires of disconnect switch to the supply wire leads using wire connectors (see Figure 4, Wiring
Diagram).
If power supply is provided by standard non-metallic
green screw located in the inside top of the back box.
screws.
2
Page 3
Installation of Recessed Back Box
CONTROL BOARD
DISCONNECT SWITCH
RED JUMPER WIRE FOR
BUILDING MANAGEMENT
SYSTEM CONNECTION
THERMISTOR
MFQC
FQCI
FI
FI
FI
MOTOR
MOTOR LEAD
MOTOR LEAD
BLUE
MFQCMFQC
FAN
DELAY
MANUAL
RESET
BLUE
RED
BLACK
BLACK
RED
L2/N
L1
LIGHT
ELEMENT
YELLOW
BLUE
BLACK
VDR1
S1
S2
B
W6
E1
E2
E3
W4
A
FAN-N
FAN-A
W6W5
Transformer
MFQC
RED
DATA CABLE
Field Connections
in Existing Construction
1. Provide a wall opening 14-1/2" (362mm) wide by 18-1/2"
(470mm) high at the desired mounting height, but no closer
than 12" (305 mm) from floor. (See Figure 2.) Locate so at
least one side of opening is at wall stud.
2. Run a power supply cable into the knockout area in the
upper right hand corner of the wall opening (see Figure 2).
All wiring must be in accordance with National and Local
Electrical Codes. Refer to Specifications for correct wire
size.
12” Min.
(305 mm)
14 1/2” Min.
(362 mm)
12” Min.
(305 mm)
Ground screw
Cable
clamp
Power supply cable
Lead wires (Blue)
7. Secure disconnect switch bracket in place by tightening
screws.
8. Insert back box in wall opening being careful not to damage
the supply wiring. Secure the back box in place with wood
screws or nails.
Installation of Back Box with Optional
Surface-Mounting Frame WHSM
1. Position back box to wall with knockouts in upper right hand
corner and secure using screws and anchors (see Figure 3).
2. Hang the surface-mounting frame on the back box. Ensure
MOUNT BACK BOX
TO WALL USING
REAR MOUNTING
HOLES.
HANG FRAME
ON BACK BOX.
Figure 3: Surface Mounting
Installation
15-5/32 "
(385mm)
3-13/16"
(97mm)
19"
(482mm)
Disconnect switch
bracket with switch
Back Box
and leads
Nail or screw (2
each side)
Figure 2: Locating Back Box in Existing Construction
3. Remove disconnect switch bracket by loosening two screws
on the right side.
4. Install a cable clamp in the “knockout” in the top of the back
box.
5. Insert power supply cable through cable clamp, allowing at
least 6" (152mm) of leads to extend inside the back box.
Connect the blue lead wires of disconnect switch to the supply wire leads using wire connectors (see Figure 4, Wiring
Diagram).
NOTE:
If power supply is provided by standard non-metallic
sheathed cable (Romex) and the supply voltage is 240 or 208
volts (two power wires), the white wire color must be changed
using black electrical tape to comply with the NEC. White is
only allowed for a Neutral conductor.
6. Connect building ground conductor to the back box using the
green screw located in the inside top of the back box.
that the back edge of the surface-mounting frame is flush
against the wall.
Note:
If heater is located in a high traffic area, where it may be
subjected to vandalism or abuse, take extreme care to see that
the box is firmly attached to the wall.
3 Run a power supply cable to the top right corner of the
mounting frame. Arrangement of wiring to this point must be
in accordance with National and Local codes. Refer to
Specifications for proper wire size.
Note:
If the wiring is to run through the wall, cut a hole in the
wall in the area of the top right corner of the back box. Run the
supply wire through this hole. Then remove the “knockout” from
the back of the box and proceed to step 3.
4. Remove the “knockout” on the top side of the frame.
5. Remove disconnect switch bracket by loosening the two
screws on the right side.
6. Feed the power supply cable through the frame allowing 6"
(152mm) of lead to remain inside the back box. Secure the
power supply cable to the back box (using cable clamp, connector, or other suitable strain relief).
7. Connect supply wires to blue wires of disconnect switch
using wiring connectors (see Figure 4, Wiring Diagram).
Figure 4- Wiring Diagram
3
Page 4
8. Connect building ground conductor to the back box by
connecting the supply ground leadwire to the green ground
screw located in the inside top of the back box.
9. Secure disconnect switch bracket in place.
Installation of Heater Assembly
Carefully position the heater assembly, with fan on top, and element on bottom into the back box.
NOTE:
The heater assembly must be carefully positioned to
ensure the wires and wire connector are not trapped between
the heater assembly and the back box.
Once the heater assembly is positioned correctly in the back
box, fasten securely using the four screws provided, one in each
corner
Figure 5- Installation of Heater Assembly
Wiring of Heater
Refer to wiring diagram Figure 4
POWER SUPPLY VOLTAGE MUST BE THE SAME AS
HEATER VOLTAGE RATING SHOWN ON HEATER NAMEPLATE. CONNECTING TO A VOLTAGE IN EXCESS OF
NAMEPLATE RATING WILL DAMAGE HEATER AND VOID
WARRANTY.
ALL CONNECTIONS MUST BE MADE WITH APPROPRIATELY SIZED LISTED WIRE CONNECTORS.
1. Connect the black (L1) heater pigtail from disconnect switch
to the black power lead on the heater assembly.
2. Connect the red (L2) heater pigtail to the other black power
lead.
3. If not already done, connect building ground condutor to
green ground screw in heater back box.
Installation of Grille and Control Wire Connector
1. Position the grille in front of the heater assembly, extend the
wire connector from the heater assembly to the matching
connector from the back of the electronic control, behind the
grille. The connector is keyed so it will fit only one way.
NOTE:
Press the connector gently and firmly, but do not force,
making sure the clip on the connectors engage.
2. Once connected, position the grille over heater back box
assembly aligning top of grille with the flange along top of
back box.
3. Attach the grille using the 4 mounting screws provided.
USE CARE AND DO NOT OVER TIGHTEN THE MOUNTING
SCREWS FOR THIS MAY DAMAGE THE GRILLE.
OPERATION
Initial Setup Instructions (Performed by Installer)
NOTE:
ing procedures to ensure proper operation of the heater.
1. Turn Unit ON: When the heater is first powered up the
2. Modes of Operation: The heater has five modes of operation.
3. Heat Mode: When the power icon is ON, the first time you
After installation, the installer should perform the follow-
buzzer beeps for one second and displays all icons in high
luminance and ON/OFF icon in half blue luminance for 3
seconds, then the unit will go to Stand-by Mode. In this mode
only the ON/OFF icon illuminates in orange color in half luminance and all other icons will be OFF.
On Standby mode, when the ON/OFF button is touched, all 4
buttons will illuminate a bright blue color indicating the heater
is ON and the display board is powered up.
Heat Mode, Ventilation Mode, Lockout Mode, Centigrade or
Fahrenheit Mode, and Volume Adjustment Mode.
touch the Mode button the unit will go to the HEAT Mode.
The screen is activated (heat icon blinking) and you can set
the set point temperature (blinking) by raising or decreasing
to your desired set point temperature. Touch mode button
again to lock the desired temperature in place. Or, wait 30
seconds and it will lock in place automatically. If the screen
is in the activated state, and there isn’t any button pressed in
30 seconds the display illumination is cut in half.
Temperature
Centigrade /
Fahrenheit Setting
Down Button
Up Button
Building Management systems (BMS)
The red jumper wire connected between terminals A and B on
the control terminal board (Figure 4, Wiring Diagram) can be
used for connection to a Building Management System (BMS).
Replace the red jumper with a dry contact (no voltage) switch:
When switch is open
BMS light on the heater touchscreen blinks.
When switch is closed
switch opened.
, BMS controls heater. Heater will not work,
, heater operates at same setting as when
Automatic mode
indicator
Heat control
indicator
Figure 6 - Control panel
4
Fan Speed
indicator
Power Button
Building Management
System mode indicator
Mode Button
Page 5
Red Warning
Light
Manual Reset
Safety Limit
Figure 7- Reset Button Location
4. Ventilation Mode: (HEATER MUST BE IN THE STAND-BY
MODE FOR THIS FEATURE). In this mode the elements will
not be energized and only the single speed fan will run.
When screen is in activated state, it should display: current
temperature and its symbol, Ventilation mode icon, or lock
icon. If no button is pressed in 30 seconds, it should illuminate a half blue color.
5. Lockout Mode: Press and hold ON/OFF and down buttons
simultaneously for 1.5 seconds, the lockout symbol will illuminate. Press both buttons again to toggle lockout symbol
on or off.
Tip:
In the lockout mode, only ON/OFF button is available. After
the power is turned on again or service is restored after a power
failure, the previous setting on lockout mode is active.
6. Fahrenheit or Centigrade Mode: Press and hold MODE and
DOWN buttons simultaneously for 1.5 seconds, the °C or °F
symbol will illuminate. Press both buttons again to toggle
between °C to °F.
7. Volume Adjustment: Press the UP and DOWN buttons simul-
taneously for 1.5 seconds and then press UP or DOWN to
set volume of Beeper: Hi(2), Low (1), and OFF(0), screen
displays different number for different volume of sound of
the beeper. Press Mode to lock in your choice.
8. Failure Codes for Temperature Control Operation Display
shows failure code: E1: Thermistor OPEN E2: Thermistor
SHORT. If the heater is in working heat mode or vacation
mode, and if there is a temperature sensor failure then the
heater will stop working. It will provide 10 alert sounds and
the failure code will blink continuously in bright blue light.
The ON / OFF icon will be displayed in blue light. All other
icons will be turned OFF and will not be displayed.
Immediately turn heater OFF at the service panel.
Investigate whether the thermistor cable is plugged in or not
on the power board. If it is plugged in, check if it has opened
or shorted. An open or shorted thermistor should be
replaced. Call the factory for assistance or call a licensed
electrician to inspect the heater.
9. Safety Alert Status for Thermal Limit Operation: If Alarm red
light comes ON, (visible by looking through grille) this means
the Safety Limit has functioned. Turn the heater OFF at the
service panel. Investigate whether or not the heater’s inlet or
outlet air openings are clear. Call the factory for assistance
or call a licensed electrician to inspect the heater.
10.BMS (Building Management System): This feature is for
optional use by building management systems. A red jumper
wire connecting terminal A and B on the electronic power
board can be removed and replaced by a Building
Management System Switch. DO NOT REMOVE THE RED
JUMPER UNLESS CONTROL BY A BUILDING MANAGEMENT SYSTEM IS BEING USED. A remote “dry contact”
switch connected to terminals A-B on the control power
board enables or disables control of the heater. Only a “dry
contact” is required since it will not carry any load. This contact if “open” puts the heater in a standby “BMS” mode and it
cannot be operated at the heater. When the heater is in the
standby “BMS” mode, the element and fan is not operable
and only displays the ambient temperature. BMS ICON
(RED) will blink, (1) one second ON, (2) two seconds OFF.
All other icons are turned off, and all buttons are disabled.
When the remote dry contact is “closed” the heater returns to
normal operation and all touch button functions are available
at the heater. With nobody to control the heater functions at
the heater location, the next ON cycle for the heater (when
the BMS dry contact is closed) the heater automatically
defaults back to the last setting prior to the time when the
Red jumper was removed from the terminal block or when
the dry contact was last opened. The desired set point temperature of the unit on BMS control should be adjusted and
leave the unit powered up and not on Standby Mode before
giving “automatic” heating control to the Building
Management System.
11.Restore Factory Settings (HEATER MUST BE IN THE
STAND-BY MODE, ON/OFF icon is amber color)
The factory settings are: Heat mode, set point is 70ºF (21ºC),
Beeper volume is low.
In the STAND BY MODE, press the MODE and DOWN buttons simultaneously for 1.5 seconds, the beeper sounds a
beep and factory settings are restored.
Operational Notice
This heater is equipped with a manual-reset safety limit control
that will automatically turn off the heater if it overheats to prevent a fire. A red warning light will illuminate (visible through the
grille) to alert that this control has activated. See Figure 7 for
the location of these devices.
THE ACTIVATION OF THE SAFETY LIMIT CONTROL AND
RED WARNING LIGHT OCCURS WHEN THE HEATER
OVERHEATS. CHECK HEATER TO MAKE SURE IT IS NOT
BLOCKED – IF SO, REMOVE THE BLOCKAGE. IF THERE IS
NO BLOCKAGE, IT IS RECOMMENDED THAT THE HEATER
BE INSPECTED BY A REPUTABLE ELECTRICIAN OR
REPAIR SERVICE TO ENSURE THE HEATER IS NOT
DAMAGED. DO NOT CONTINUE TO USE HEATER IF IT
REPEATEDLY CYCLES OFF ON THIS SAFETY LIMIT.
TO RESET SAFETY LIMIT (SEE FIGURE 7)
The manual reset button is located behind the front grille above
the element on the left side. Once the heater has cooled, push
the reset button through the grille. The heater should return to
normal operation.
5
Page 6
MAINTENANCE
Your heater is designed for years of trouble-free operation and
requires no special maintenance other than occasional cleaning.
The motor is permanently lubricated.
Cleaning
At least once each year (or more often in dirty environments),
the heater should be cleaned to remove dust and other foreign
material which has collected during the heating season, as
follows:
THE OUTSIDE SURFACES MAY BE CLEANED WITH MILD
DETERGENT AND A DAMP CLOTH BY THE USER.
ALL OTHER SERVICING SHOULD BE PERFORMED BY AN
ELECTRICIAN OR QUALIFIED PERSON
1. Turn power off at main switch.
NOTE:
right corner of heater may be used to turn off power to heater
during cleaning and servicing.
2. Remove front grille by removing the four screws in each
3. Use vacuum cleaner with brush attachment to remove dust
4. Replace grille.
5. Wipe grille clean with a damp cloth. DO NOT use waxes or
6. Turn the main line switch on at the switch panel to restore
With grille removed, the ON/OFF switch located in upper
corner.
and dirt that has accumulated in heater (especially around
element and blower blade). Do not use water or any cleaners
to clean heater components.
any cleaners that leave a residue since these may discolor
during heater operation.
power to heater. The heater is now ready for another season
of operation.
All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for one year from date of installation, except
LIMITED WARRANTY
heating elements which are warranted against defects in workmanship and materials for five years from date of installation. This warranty does not apply to damage from
accident, misuse, or alteration; nor where the connected voltage is more than 5% above the nameplate voltage; nor to equipment improperly installed or wired or
maintained in violation of the product’s installation instructions. All claims for warranty work must be accompanied by proof of the date of installation.
The customer shall be responsible for all costs incurred in the removal or reinstallation of products, including labor costs, and shipping costs incurred to return products
to Marley Engineered Products Service Center. Within the limitations of this warranty, inoperative units should be returned to the nearest Marley authorized service center or the Marley Engineered Products Service Center, and we will repair or replace, at our option, at no charge to you with return freight paid by Marley. It is agreed that
such repair or replacement is the exclusive remedy available from Marley Engineered Products.
THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE AFORESAID EXPRESSED WARRANTIES ARE HEREBY DISCLAIMED AND EXCLUDED FROM
THIS AGREEMENT. MARLEY ENGINEERED PRODUCTS SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES ARISING WITH RESPECT TO THE
PRODUCT, WHETHER BASED UPON NEGLIGENCE, TORT, STRICT LIABILITY, OR CONTRACT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you. This warranty gives
you specific legal rights, and you may also have other rights which vary from state to state.
For the address of your nearest authorized service center, contact Marley Engineered Products in Bennettsville, SC, at 1-800-642-4328. Merchandise returned to the factory must be accompanied by a return authorization and service identification tag, both available from Marley Engineered Products. When requesting return authorization,
include all catalog numbers shown on the products.
HOW TO OBTAIN WARRANTY SERVICE AND
WARRANTY PARTS PLUS GENERAL INFORMATION
1. Warranty Service or Parts
2. Purchase Replacement Parts
3. General Product Information
Note:
When obtaining service always have the following:
1. Model number of the product
2. Date of manufacture
3. Part number or description
1-800-642-4328
1-800-654-3545
www.marleymep.com
470 Beauty Spot Rd. East
Bennettsville, SC 29512 USA
Part No. 5200-11065-001
ECR 39154
06/11
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