Sterling QVSF 100, Installation Instructions & Parts List

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5
INSTALLATION
Do not install unit heaters in corro-
sive or fl ammable atmospheres! Premature failure
of, or severe damage to the unit will result!
Avoid locations where extreme
drafts can affect burner operation. Unit heaters
must not be installed in locations where air for
combustion would contain chlorinated, halogenated
or acidic vapors. If located in such an environment,
premature failure of the unit will occur!
Since the unit is equipped with an automatic gas ignition
system, the unit heater must be installed such that the
gas ignition control system is not directly exposed to water
spray, rain or dripping water.
NOTICE: Location of unit heaters is related directly to
the selection of sizes (refer to Figure 2). Basic rules
are as follows:
Figure 2 - Heater Location
MOUNTING HEIGHT:
Unit Heaters must be installed at
a minimum of 8 feet (2.4m) above the fl oor, measured to
the bottom of the unit. At heights above 8 feet (2.4m), less
efficient air distribution will result. Occasionally unit
heaters must be mounted at heights of 12 to 16 feet (3.66
to 4.88m) in order to clear obstacles. When this is the
case, it is advisable to use centrifugal blower unit heaters.
If the unit heater to be mounted below 8 feet (2.4m) above
the
fl oor, the unit heater must be equipped with an OSHA
approved fan guard.
AIRCRAFT HANGARS: Unit Heaters must be installed in
aircraft hangars and public garages as follows: In aircraft
hangars, unit heaters must be at least 10 feet (3.0m)
above the upper surface of wings or engine enclosures
of the highest aircraft to be stored in the hangar and
8 feet (2.4m) above the
fl oor in shops, of fi ces and other
sections of the hangar where aircraft are not stored or
housed. Refer to current ANSI/NFPA No. 409, Aircraft
Hangars. In Canada, installation is suitable in aircraft
hangars when acceptable to the enforcing authorities.
PUBLIC GARAGES:
In repair garages, unit heaters must
be at least 8 feet (2.4m) above the fl oor. Refer to the latest
edition of NFPA No. 88B, Repair Garages.
In parking structures, unit heaters must be installed
so that the burner flames are located a minimum of
18 inches (457mm) above the floor or protected by a
partition not less than 18 inches (457mm) high. However,
any unit heater mounted in a parking structure less than
8 ft. (2.4m) above the floor must be equipped with an
OSHA approved fan guard. Refer to the latest edition of
NFPA 88A, Parking Structures.
In Canada, installation must be in accordance to the
latest edition of CGA-B149 “Installation Codes for Gas
Burning Appliances and Equipment.”
AIR DISTRIBUTION:
Direct air towards areas of
maximum heat loss. When multiple heaters are involved,
circulation of air around the perimeter is recommended
where heated air
fl ows along exposed walls. Satisfactory
results can also be obtained where multiple heaters are
located toward the center of the area with heated air
directed toward the outside walls. Be careful to avoid
all obstacles and obstructions which could impede the
warm air distribution patterns. Heat throw distances are
presented in Table 2, and Figure 2A.
Figure 2A - Heat Throw Distances
ft. 100,000 125,000 150,000 175,000 200,000 225,000 250,000 300,000 350,000 400,000
(m) (29.3) (36.6) (43.9) (51.2) (58.6) (65.9) (73.2) (87.8) (102.5) (117.1)
8 60 65 70 75 80 85 90 105 110 120
(2.4) (18.3) (19.8) (21.3) (22.9) (24.4) (25.9) (27.4) (32.0) (33.5) (36.6)
10 54 56 60 64 68 72 78 90 95 100
(3.0) (16.5) (17.1) (18.3) (19.5) (20.7) (21.9) (23.8) (27.4) (29.0) (30.5)
12 44 46 49 57 61 65 68 80 84 90
(3.7) (13.4) (14.0) (20.7) (17.4) (18.6) (19.8) (20.7) (24.4) (25.6) (27.4)
15 NR NR 45 49 52 56 60 70 74 80
(4.6) (22.6) (14.9) (15.8) (17.1) (18.3) (21.3) (22.6) (24.4)
20 NR NR NR NR 46 50 54 63 66 70
(6.1) (14.0) (15.2) (16.5) (19.2) (20.1) (21.3)
UNIT SIZE BTU/Hr (kW)
“H”
NR = Not recommended H = Distance from fl oor to bottom of the unit.
D2787
“H”
Unit
Heater
Floor Line
Table 2 - Standard Applications Heat Throw Distances (see fi gure 2A)