Qmark QWD - Washdown Corrosion Resistant Unit Heaters - Manual (Page 3)

small rooms can be heated by one unit heater. Where two walls
are exposed, the heater should be mounted as shown in
figure 1.
Large rooms require multi-unit installations. Number and capaci-
ty of units will be determined by volume of building and square
feet of floor area to be heated. Arrange units to provide perimeter
air circulation where each unit supports the air stream from
another.
Mounting Heaters with supplied Universal
Mounting Bracket
NOTICE — These heaters are designed for wall and ceiling
mounting with horizontal air discharge only. other modes of
mounting voids factory warranty.
1. Height above floor
A. in areas where ceiling height is more than 12 feet (3658
mm), recommended mounting height is approximately 10
feet (3048 mm) to underside of heater.
B. for ceiling heights of 12 feet (3658 mm) or less, maximum
mounting height is determined by use of the mounting
bracket offered for these heaters. Minimum spacing to ceil-
ing is 9” (229 mm). (see figure 2.)
C. in either case the minimum mounting height is 7 feet (2134
mm) from floor to bottom of heater. (figure 2)
2. spacing to adjacent walls (see figure 2).
A. rear of case to back wall 6” (152mm) minimum.
B. side of case to side wall 8” (203 mm) minimum.
NOTE: if two or more units are operated in the same enclosed
air space, their discharges should be directed to aid in develop-
ment of mass air movement for uniform heat dispersal.
Wiring
Refer to wiring diagram included with the unit.
The wiring diagram can be found on the inside of the door to the
wiring compartment. should you have any questions, please
contact Technical service at 800-642-4328. Have your model
number found on the name plate for reference.
NOTE: All electrical wiring must be done according to National
Electrical and local codes by a qualified person.
IMPORTANT NOTE - Installation Screw Lug Torque: During
transportation it is possible screw lug connections can loosen.
After installation, before power is turned on to the heater, check
all screw lug connections for tightness to a recommended mini-
mum torque of 35 in-lbs. (3.9 N-m). A tool is included for tighten-
ing lugs in hard to reach locations
1. Connect heater according to the voltage and frequency spec-
ified on the nameplate.
2. All units are provided with control and power terminal blocks
for customer’s connection.
3. Protection against overheating is provided by an internal
automatic thermal cutout (manual reset cutout optional)
which opens the electric circuit if the normal air-flow is
restricted or stopped. Cutout automatically energizes heater
on removal of the obstruction. if optional manual reset is
tripped, determine cause before re-energizing.
ELECTriC sHoCK HAzArD. ANy iNsTALLATioN iNVoLV-
iNg ELECTriC HEATErs MusT BE PErforMED By A
quALifiED PErsoN AND MusT BE EffECTiVELy
grouNDED iN ACCorDANCE WiTH THE NATioNAL
ELECTriCAL CoDE To ELiMiNATE sHoCK HAzArD.
ALL ELECTriCAL CoNDuiT AND fiTTiNgs MusT BE LisTED
for WATErTigHT APPLiCATioNs To MAiNTAiN THE NEMA
4X ENCLosurE CLAssifiCATioN To PrEVENT HosE
DirECTED WATEr froM ENTEriNg ELECTriCAL BoX.
THE sysTEM DEsigNEr is rEsPoNsiBLE for THE
sAfETy of THis EquiPMENT AND sHouLD iNsTALL
ADEquATE BACK-uP CoNTroLs AND sAfETy DEViCEs
WiTH THEir ELECTriC HEATiNg EquiPMENT. WHErE THE
CoNsEquENCEs of fAiLurE CouLD rEsuLT iN
PErsoNAL iNJury or ProPErTy DAMAgE, BACK-uP
CoNTroLs ArE EssENTiAL.
3
Dimensions Inches (mm)
kW A B C D
2-10 13 (330) 19.5 (495) 18 (457) 19.5 (495)
12.5-39.0 20 (508) 31 (787) 27 (686) 24.2 (615)
A
Wall
Ceiling
Floor
6" Min.
(152 mm)
D
Ceiling
Wall
8" Min.
(203 mm)
B
Floor
7' Min.
(2134 mm)
7' Min.
(2134 mm)
9" Min.
(229 mm)
Wall
6"
(152 mm)
C
Ceiling
Floor Figure 2
45° Minimum
Angle
Figure 3 - Louver Adjustment