Qmark MWUH User Manual [en, es, fr]
MWUH
Horizontal / Vertical
Unit Heater
Installation, Operation & Maintenance Instructions
Table 1. Specifications
Amps BTU/hour
40V
08V
2
WUH5004A
M
* 5000 W @ 240/208V - 1 - 60 20.9 24.0 270 60˚F 17,065 12,799
4165 W @ 240/208V - 1 - 60 17.4 20.0 270 60˚F 14,215 10,659
3332 W @ 240/208V - 1 - 60 13.9 16.0 270 60˚F 11,365 8,533
2500 W @ 240/208V - 1 - 60 10.4 12.0 270 60˚F 8,533 6,393
MWUH5008A
5000 W @ 208V - 1 - 60 - 24.0 270 60˚F - 17,065
*
165 W @ 208V - 1 - 60 - 20.0 270 60˚F - 14,215
4
3332 W @ 208V - 1 - 60 - 16.0 270 60˚F - 11,365
2500 W @ 208V - 1 - 60 - 12.0 270 60˚F - 8,533
*Heater is shipped from factory wired for these wattages. Heater can be field adjusted to the
other wattages.
Can be operated at 208V See Table 2 for output ratings)
(
2
FMRise
C
40V
2
08V
2
IMPORTANT INSTRUCTIONS
WARNING
WHEN USING ELECTRIC APPLIANCES, BASIC PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE THE
RISK OF FIRE, ELECTRIC SHOCK, AND INJURY TO PERSONS, INCLUDING THE FOLLOWING:
1. Read all instructions before installing or using this heater.
2. 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, etc. and
curtains at least 3 feet (0.9 m) from the front of the heater.
3. Extreme caution is necessary when any heater is used by or
near children or invalids and whenever the heater is left
operating and unattended.
4. Do not operate any heater after it malfunctions. Disconnect
power at service panel and have heater inspected by a reputable electrician before using.
5. Do not use outdoors.
6. To disconnect heater, turn controls to off, and turn off power
to heater circuit at main disconnect panel.
7. Do not insert or allow foreign objects to enter any ventilation
or exhaust opening as this may cause an electric shock, fire,
or damage to the heater.
!
8. To prevent a possible fire, do not block air intake or exhaust
in any manner.
9. A heater has hot and arcing or sparking parts inside. Do not
use it in areas where gasoline, paint, or flammable liquids
are used or stored.
10. 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.
11. This heater is intended for comfort heating applications and
not intended for use in special environments. Do not use in
damp or wet locations such as marine or greenhouse or in
areas where corrosive or chemical agents are present.
12. When installing, see INSTALLATION INSTRUCTIONS for
additional warnings and precautions.
13. For safe and efficient operation, and to extend the life of your
heater, keep your heater clean - See MAINTENANCE
INSTRUCTIONS.
SAVE THESE INSTRUCTIONS
ECR 39427 09/12 5200-11173-000
INSTALLATION
SIDE VIEW
MOUNTIN G
LOCA TIO N
5 1 / 2 in.
1
/ 2 in., 3 / 4 in .
1 3 / 4 in.
14 in.
12 1 / 2 in.
FRONT VIEW
11 1 / 4 in.
MINIMUM
DIST ANC E
TO FlOOR
6 ft.
MINIMUM
DIST ANC E
TO WA LL
13 in.
7 3 / 8 in .
MAXIMIUM MOUNTING HEIGHT FOR:
V ertical air delivery unit = 11 ft.
Horizontal air delivery unit = 8 ft.
Note: Min. clearance to ceiling
when not using mounting brackets
is 1
5
/ 8 in.
36 in.
MINIMUM
DIST ANC E
FRO M
DISCHARGE
TO ANY
OBJECT
INSTRUCTIONS
To prevent a possible fire, injury to persons or damage to the
heater, adhere to the following:
1. Disconnect all power coming to heater at main service
panel before wiring or servicing.
2. All wiring procedures and connections must be in accordance with the National and Local Codes having jurisdiction and the heater must be grounded.
3. Verify the power supply voltage coming to heater matches
the ratings as shown on the heater nameplate.
CAUTION: ENERGIZING HEATER AT A VOLTAGE GREATER
THAN THE VOLTAGE PRINTED ON THE NAMEPLATE WILL
DAMAGE THE HEATER AND VOID THE WARRANTY AND
COULD CAUSE A FIRE.
4. CAUTION - High temperature, risk of fire, keep electrical
cords, drapery, furnishings, and other combustibles at least
3 feet (0.9 m) from front of heater. Do not install heater
behind doors, below towel racks, or in an area where it is
subject to being blocked by furniture, curtains or storage
materials. Hot air from the heater may damage certain fabrics and plastics.
5. To reduce the risk of fire, do not store or use gasoline or
other flammable vapors and liquids in the vicinity of the
heater.
6. When heater is to be wall or ceiling mounted, the anchoring
provisions must be of sufficient strength to support the total
weight of the heater plus the weight of the mounting provisions. Failure to properly secure the supporting members
of the building structure could allow the heater to fall.
7. The following minimum clearances must be maintained:
For Vertical Airflow, Bottom of Heater to Floor:
6’ (1829 mm) minimum, 11’(3353 mm) maximum
Horizontal Aiflow, Bottom of Heater to Floor:
6’ (1829 mm) minimum, 8’(2438 mm) maximum
Sides of heater to adjacent wall :
Airflow from Horizontal to 45° downward: 13” (330 mm) Airflow from 45° downward to straight down 48”
(1219 mm).
Discharge to any object: 36” (915 mm) minimum
8. Do not use this heater for dry out as the paint, plaster, sawdust and drywall sanding dust will permanently damage the
heater and must be kept out of the heater.
Unpacking Your New Heater
Remove the heater from the box and inspect it for any damage.
If it appears to be damaged, immediately return it to the store
from which you purchased it.
Tools Needed
You will need the following tools to install your MWUH
electric heater:
• Screwdriver • Needle nose pliers • Pliers
• Electric Drill and 1/4" (6.35 mm) bit •Adjustable wrench
Hardware Needed
You will also need the following hardware for installation:
• Enough 10 ga. min. insulated copper conductor (with ground)
wire to run power from the breaker/ fuse to the heater. Only
use copper wire rated at least 75° C. Do not use aluminum
wire with this unit.
• Proper size fuses and circuit breakers in accordance with the
National Electrical Code. Also see Table 2 Heat Output
Adjustments
• Screw wood, 3/8" x 2" (9.5 mm x 50 mm) Lag bolts (Qty. 1 or 2).
• Washer, 3/8" (9.7 mm) (Qty. 2)
• Wire connectors sized to your application.
NOTE: For certain applications, conduit may be required (see
Figure 2). Check local electrical codes. If wiring is run in conduit,
be sure there is enough flexible conduit to allow the heater to be
turned if necessary.
Conduit
Conduit
Connector
Flexible Conduit
Flexible NM Cable
1
3
Flexible Conduit Connector
1
Flexible NM Cable Connector
2
2
4
Figure 2 - Connectors, cable, and hardware used to wire
the MWUH
Locating the Heater
The heater should be installed out of traffic areas and at least 6'
off the floor. The direction of air flow should not be restricted (ie:
by columns or machinery) and the air flow should wipe exposed
walls, rather than blowing directly at them. When more than one
heater is used in an area, the heaters should be arranged so
that the air discharge of each heater supports the air flow of the
others to provide best circulation of warm air, as indicated in
Figure 3, below.
Figure 1 - Dimension Data
Figure 3
2
Mounting
CEILING JOIST
WASHER
3
/8" DIAGONAL
BRACKET
C
EILING JOIST
WASH ER
3
/8" DIAGONAL
L
AG BOLT
BRACKET
BLK
1
2
3
4
5
6
ELEMENT
HI
LIMIT
FAN
CONT.
7
8
9
10
11
12
C D A B
WATTAGE CHANGE
TERMINAL BOARD
GROUND
THERMOSTAT
L1 L2
POWER
TERMINAL
BLOCK
FIELD
WIRING
FAN
ALARM LIGHT
MOTOR
RD
YL
BLU
G
R
EEN
(or
Ba
r
e
Coppe
r
)
W
HI
T
E
B
L
A
C
K
L
1
L
2
B
OT
T
OM
V
I
E
W
P
OW
E
R
T
E
RMI
NA
L
B
L
OC
K
1. Remove the mounting bracket from the heating unit by loosening the bracket screws with a wrench and slipping the handle off over the screw heads.
2. Locate a stud in the ceiling and attach the mounting bracket
to the ceiling joist as shown in Figures 4-A or 4-B. Place a
washer on the screw between the bracket and the ceiling to
act as a spacer and screw them into the stud. Tighten the
screws enough to securely hold the heating unit with the air
flow pointed in the proper direction.
Figure 6
*
*NOTE: 240/208 volts. When wiring with a two conductor cable
with ground, the white wire must be marked black.
Figure 4-A
Figure 4-B
Single-Screw Mounting
Double-Screw Mounting
3. Lift the heater up and into the mounting bracket. Align the
screws on each side of the heater with the keyhole slots in
the mounting brackets. If the heater is to be tilted, it must be
positioned in the lower keyhole slots (see Figure 5). Tighten
the bracket screws so the unit is securely suspended at the
desired position.
USE BOTTOM KEYHOLE
SLOTS IF HEATER IS
TO BE TILTED DOWN
Figure 5
REMOVE SCREW TO OPEN DOOR
Wiring
1. To connect the power to the heater, simply remove the screw
from the front of the unit. This allows the hinged bottom to
open, providing access to the electrical wiring and connectors. (See Figure 5)
2. Attach the cable connectors to the unit (See Figure 2) and
slide the 10 gauge wire through the cable connector. Pull
NOTE: Wiring compartment volume: 370 in
enough wire through the connector to work with when making the the connections.
3. Connect the wire to the power terminal block located in the
base of the heater (See Figure 6).
NOTE: Unit is 240/208 volts. When wiring a two conductor cable
with ground the white wire must be marked black by adding a piece
of black electrical tape to the wire near the point of connection.
NOTE: To decrease the heat output of the heating unit, see
Adjusting the Heat Output, Table 2 and Wiring Diagram Figure 7.
3
(6063 cm3)
TO PREVENT POSSIBLE ELECTRIC SHOCK, DISCONNECT
POWER TO THE HEATER AT THE MAIN SERVICE BOX
BEFORE ATTEMPTING TO ADJUST THE HEAT OUTPUT OF
THIS UNIT.
Adjusting the Heat Output
Heat output can be increased or decreased by switching wires at
the wattage change terminal board. The heater is factory wired
to deliver a heat output of 17,065 BTU per hour. Should your particular application require less heat output, refer to Table 2
below and change the wires at the wattage change terminal
board as shown in Wiring Diagram Figure 7.
TABLE 2. HEAT OUTPUT ADJUSTMENTS
MAX
BTU/HR VOLTS WATTS SIZE AMPS C-D TO A-B
MODEL NO. MWUH5004A
17065 240 5000 30 20.9 None
14215 240 4165 25 17.4 Blue
11365 240 3332 20 13.9 Blue & Yellow
8533 240 2500 15 10.4 Blue, Yellow & Red
12799 208 3750 25 18.0 None
10659 208 3123 20 15.0 Blue
8533 208 2500 15 12.0 Blue & Yellow
6393 208 1874 15 9.0 Blue, Yellow & Red
MODEL NO. MWUH5008A
17065 208 5000 30 24.0 None
14215 208 4165 25 20.0 Blue
11365 208 3332 20 16.0 Blue & Yellow
8533 208 2500 15 12.0 Blue, Yellow & Red
Figure 7 - Wiring Diagram
3
FUSE HEATER MOVE JUMPERS FROM
208/240V - MWUH 5004A
208V - MWUH5008A
OPERATING
INSTRUCTIONS
1. Heater must be properly installed before operation.
2. After heater is completely assembled, rotate thermostat knob
counterclockwise until control stops. This is the minimum
heat setting.
3. Turn power supply to heater “ON” at main switch panel.
4. Heater should not operate. If it operates disconnect power
and recheck wiring.
5. Rotate thermostat clockwise until it stops (maximum heat setting).
6. Heater should turn on after a brief delay (see Automatic Fan
Delay below). If heater and fan do not come on, disconnect
power and check wiring.
NOTE: The first time you operate the unit, it may smoke slightly.
This is due to the residual cleaning agents used to clean the element when the heater is manufactured. This is normal and does
not indicate a problem with the unit. This condition will stop after
the heater has been in operation for a few minutes.
7. Allow heater to continue to operate until room temperature
reaches desired comfort level. Then rotate thermostat knob
counterclockwise slowly until thermostat clicks off. (Note that
the fan delay will keep the fan running until the elements
cool.) Heater will cycle on and off to maintain room temperature.
8. It may be necessary to readjust thermostat a time or so until
exact comfort level is attained. Rotation in the clockwise
direction will increase the amount of time the heater will produce heat. Rotation in the counterclockwise direction will
reduce the amount of time the heater is on.
Automatic Fan Delay: The MWUH has an automatic fan delay.
When the thermostat calls for heat, fan action is delayed
momentarily until the heating elements warm. This prevents the
circulation of cold air. When the heater raises the temperature of
the room to the thermostat set point, the heating element is
turned off but the fan will continue to run until the heating element cools down. This prevents exposing the unit to residual
heat, provides a higher comfort level and prolonged element life.
Automatic Thermal Limit: The MWUH is equipped with a thermal limit which will automatically shut off the heater in the event
of overheating. The heater will turn on when the operating temperature returns to normal. Should the unit overheat and activate
the thermal limit, the cause of the overheating should be determined before further operation.
NOTE: If the unit is installed in an area where the temperature is
below 50° F, the fan may cycle on and off until the temperature
in the room rises above 50° F, this is normal and does not indicate a problem with the unit. As soon as the heater warms the
air in the room above 50°, the fan will operate continually until
the thermostat has reached the room set point.
Adjusting Air Flow Direction
You can adjust the direction of air flow by:
1. Turning the unit. If the unit has been installed with a single
lag bolt, as shown in Figure 4-A, simply turn the entire unit as
needed to adjust air flow.
2. Tilting the unit. Loosen the bracket screws, tilt the heater to
the desired position, and re-tighten the bracket screws (see
Figure 4).
NOTE: To tilt the heater it must be mounted in bottom key hole
slots of mounting bracket to maintain adequate clearance and
prevent possible overheating.
3. Adjusting the louvers to the desired position.
NOTE: The louvers are designed so they can not be completely
closed. Do not attempt to defeat this feature, damage to the unit
can result.
It is important to keep this heater clean. Your heater will give you
years of service and comfort with only minimum care. To assure
efficient operation follow the simple instructions below.
ALL SERVICING BEYOND SIMPLE CLEANING THAT
REQUIRES DISASSEMBLY SHOULD BE PERFORMED BY
QUALIFIED SERVICE PERSONNEL.
TO REDUCE RISK OF FIRE AND ELECTRIC SHOCK OR
INJURY, DISCONNECT ALL POWER COMING TO HEATER
AT MAIN SERVICE PANEL AND CHECK THAT THE ELEMENT
IS COOL BEFORE SERVICING OR PERFORMING
MAINTENANCE.
User Cleaning Instructions:
1. After the heater has cooled, a vacuum cleaner with brush
attachment may be used to remove dust and lint from exterior
surfaces of the heater including the grille openings.
2. With a damp cloth, wipe dust and lint from grille and exterior
surfaces.
3. Return power to heater and check to make sure it is operating properly.
DO NOT TAMPER WITH OR BYPASS ANY SAFETY LIMITS
INSIDE HEATER.
CAUTION - DO NOT CONTINUE TO ATTEMPT TO USE THE
HEATER IF THE THERMAL LIMIT REPEATEDLY OPERATES.
TO DO SO COULD PERMANENTLY DAMAGE THE HEATER
OR CREATE A FIRE OR SAFETY HAZARD.
Maintenance Cleaning Instructions:
(To be performed only by Qualified Service Personnel)
At least annually, the heater should be cleaned and serviced by
a qualified service person to assure safe and efficient operation.
After completing the cleaning and servicing, the heater should
checked for proper operation.
4
MAINTENANCE
INSTRUCTIONS
It is important to keep this heater clean. Your heater will give you
years of service and comfort with only minimum care. To assure
efficient operation follow the simple instructions below.
ALL SERVICING BEYOND SIMPLE CLEANING THAT
REQUIRES DISASSEMBLY SHOULD BE PERFORMED BY
QUALIFIED SERVICE PERSONNEL.
TO REDUCE RISK OF FIRE AND ELECTRIC SHOCK OR
INJURY, DISCONNECT ALL POWER COMING TO HEATER
AT MAIN SERVICE PANEL AND CHECK THAT THE ELEMENT
IS COOL BEFORE SERVICING OR PERFORMING
MAINTENANCE.
User Cleaning Instructions:
1. After the heater has cooled, a vacuum cleaner with brush
attachment may be used to remove dust and lint from exterior
surfaces of the heater including the grille openings.
2. With a damp cloth, wipe dust and lint from grille and exterior
surfaces.
3. Return power to heater and check to make sure it is operating properly.
Maintenance Cleaning Instructions:
(To be performed only by Qualified Service Personnel)
At least annually, the heater should be cleaned and serviced by
a qualified service person to assure safe and efficient operation.
After completing the cleaning and servicing, the heater should
be checked for proper operation.
5
Notes/Notas/Notes
6
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