Submittal Sheet

The electric unit heater(s) shall be as manufactured by QMark, A Marley
Engineered Products Brand, Bennettsville, SC. Heater(s) shall be fully UL
approved, designed for either wall or ceiling mounting without modification
and operate at either 208 or 240 VAC and have field-adjustable capacity
from 1.875 to 5 KW (Model MWUH5004) and 2.812 to 7.5 KW (Model
MWUH7504).
HOUSING: The cabinet shall be of heavy gauge steel, welded and
phosphatized; then completely painted desert tan by a baked enamel
painting process. Front and back panels shall be removable to gain full
access to element, motor and fan area. Fan guard shall be painted to
match heater for appearance and durability. Heater(s) shall be furnished
with attached ceiling mounting bracket and shall be capability of full
horizontal and vertical position. Heater(s) shall be so designed as to
permit mounting within two inches of the ceiling in full horizontal mode.
CONTROL BOX: The control box, housing all heater wiring and controls,
shall be located at the bottom of the heater and equipped with a swing
down hinged cover to permit full access for installation and servicing
without dismounting the heater.
WIRING:All heater and control wiring connections shall terminate in the
control box. Proper wiring diagram shall be attached to the inside of the
control box cover. 60° C wire may be used to bring entry wiring into
compartment.
FAN MOTOR: Fan motor shall be totally enclosed, impedance protected
and of unit bearing design suitable for horizontal or vertical operation with
high starting and running torques. Fan motor and controls shall operate
directly from the line voltage.
HEATING ELEMENT: The heating element shall be warranted for five
years and shall be of non-glowing design consisting of a special
resistance wire enclosed in the steel sheath to which steel plate fins are
brazed. The heating element shall cover the entire air discharge area for
uniform heating.
THERMAL CUTOUT: Thermal cutout shall be built into the system to
automatically shut off heater in event of overheating and reactivate the
heater when temperatures return to normal.
* QMark reserves the right to change specifications without prior notice.
ARCHITECT’S AND ENGINEER SPECIFICATIONS*
DIMENSIONS
MWUH SERIES
470 Beauty Spot Rd. E, Bennettsville, SC 29512
CONTROL
BTU FAN CIRCUIT & FAN AIR MIN. MIN.
CATALOG PER MOTOR FAN MOTOR MOTOR VOLUME. MFG. HEATER CKT. WT.
NUMBER VOLTS WATTS HR. PHASE WATTS VOLTS RPM CFM THROW HT. AMPS AMPS (LBS.)
1874 6396 9.0 11.3
208
2500 8553
208
12.0 15.0
3123 10659 15.0 18.5
MWUH5004
3750 12799
16 1350 270 16’ 6’
18.0 22.5
24
2500 8533 10.4 13.0
240
3332 11365
240
13.9 17.4
4165 14215 17.4 21.8
5000 17065 20.9 26.1
2812 9598 13.5 16.9
208
3750 12799
208
18.0 22.5
4685 15990 22.5 28.1
MWUH7504
5625 19198
16 1400 270 18’ 8’
27.1 33.9
27
3750 12799 15.6 19.5
240
5000 17065
240
20.8 26.0
6250 21331 26.0 32.5
7500 25598 31.3 39.1
CATALOG NO. DESCRIPTION
DS-30 3-pole power disconnect switch for
field installation. Complies with
“positive off” requirements.
CONTROLS AND ACCESSORIES
208
3332 11365
208
16.0 15.0
4165 14215 20.0 20.0
MWUH5008
5000
17065
61 1400
208 16’
8’
24.0 26.0
26
2500
8533
12.0
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