Venting - HeatStar HSU100NGPALP Operating Instructions And Owner's Manual

FRONT VIEW OF HEATER
FIGURE 2
18. For installations in aircraft hangers, parking garages and repair
garages refer to the following standards:
• ANSI/NFPA 409 Standard on Aircraft Hangers
• ANSI/NFPA 88A Standard for Parking Garages
• ANSI/NFPA 88B Standard for Repair Garages
• CSA B149.1 Natural Gas and Propane Installation Code
19. To prevent damage to the heater, fully support the bottom of the
heater with wood, the shipping pallet or other suitable material
when using machines or forklifts to lift the heater into position.
20. The heater is to be suspended from above and is not for
installation on a combustible surface (wood, drywall, plastic). On
models HSU100 to HSU400 there are four mounting holes on top
of the heater for 3/8"-16 threaded rod. Locking nuts and washers
should be used to lock the threaded rod tightly into the heater
mounting holes.
21. The threaded rod should be threaded all the way through the
threaded hole on the top of the unit until the rod is visible inside
the heater. Usually a minimum of 6 turns.
22. The structure supporting the heater must have adequate strength
to hold the weight of the heater without distortion or damage.
Refer to Table 1 for unit weights.
23. For proper operation, the unit must be installed in a level
horizontal position.
24. If the heater is mounted too high, the hot air may not reach
the work area. Mount the heater as low as possible considering
local/national codes. Consider clearances for equipment (such as
forklifts) and other guidelines from this manual for the minimum
distance/clearance to the floor, materials or personnel.
Optional Low Clearance Mounting For HSU100 & HSU125
25. The optional low clearance mounting brackets, part number
60470 in Figure 2A can be used to mount the heater directly to
the ceiling. ONLY USE THESE BRACKETS ON MODELS HSU100
AND HSU125.
26. Remove the #10 screws as indicated in Figure 3A. KEEP THESE
SCREWS. There are 3 on the front and 4 on the back.
27. Place the low clearance mounting brackets on the heater as
shown in Figure 2A.
28. Use the screws removed in the steps above to attach the low
29. This will provide the 1" (2.54 cm) of clearance required to the
30. Using properly sized fasteners (nuts and bolts for steel or lag
31. Secure the heater to structural supports capable of holding the
Low Clearance Mounting Bracket Hole Spacing

VENTING

WARNING: If an existing heater is being replaced, it may be
necessary to resize the venting systems. Improperly sized
venting systems can result in death or injury.
WARNING: If the optional inlet air pipe is used, it must be
located in the same plane as the vent pipe on the exterior of
the building. Failure to have the vent pipe and inlet air pipe
located in the same plane (roof or wall) could result in injury
or death.
6
Compact Unit Heater
clearance mounting brackets to the heater. Do not over tighten
the screws or you will strip out the holes.
ceiling for the MHU100 & 125.
bolts for wood) secure the heater to the ceiling. 3/8" diameter
fasteners are recommended for most applications.
weight of the heater (Table 1) and with spacings shown in Figure
2B.
Low Clearance Mounting Brackets
FIGURE 2A
FIGURE 2B
Operating Instructions and Owner's Manual
#10 - 1/2 screw