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8. SUSPENDING THE SYSTEM - GENERAL - details in Section 9
Inadequate or improper suspension of the tube heater can result in collapse of
the system, property damage, and personal injury or death.
It is the installer's responsibility to ensure that the hardware and structural sup-
ports from which the heater is suspended are sound and of adequate strength
to support the weight and expansion forces of the heater.
Consider that the heater will expand in length as much as 1/2 inch (12.5 mm) or more for every
10 ft (3 m) of system length – typically the greater the firing rate, the greater the expansion.
1) Survey the available structural supports, considering the system configuration and heat re-
quirements of the area to establish the optimum heater location.
a) Locating a heater directly under joists or beams, or installing supplemental steel support
rail or angle iron can substantially reduce labor and materials
2) Tube system hangers must be located: A) straight in line; B) at a common height (level);
and C) at appropriate distances along the heater length - see Figure 7 page 15.
a) NOTE: It is important that the tubes in the system are installed in alignment horizontally
(level) and vertically (in line) – this will ensure system integrity
3) Hardware with a minimum 90 lb. (41 kg) work load must be used at the first burner end
hanger, and with a minimum 60 lb. (27 kg) at all other hanger suspension points. A #2 Lion
Chain (equivalent or heavier gauge) is typically used to suspend the heater.
a) Connect to the structure using typical hardware as illustrated in FIGURE 5 (below) or by
other mechanically sound means
b) If rigid devices such as 3/8" threaded rods are used for suspension, swing joints or other
means must be provided to allow for system expansion - approximately ½ inch to 1 inch
for every 10 ft (1 cm to 2.5 cm for every 3 m) of system length.
FIGURE 5 TYPICAL MOUNTING HARDWARE
HOOK OR EYE BOLT / SCREW
NOTE: It is the installer's responsibility to ensure that mounting hardware and fas-
tening to structure are of sufficient strength to support the system.
4) Hangers are provided to suspend the tube/reflector system – see FIGURE 6
The hangers supplied with the heater must be used for heater suspension
To orient the reflector from horizontal to 30°, hangers can be suspended from either of
two eye loops in the hanger - see FIGURE 6
Hangers are positioned along the system length as indicated in FIGURE 7
Dimensions from air intake to vent end are listed in TABLE 3
PIPE RING/CLEVIS
13
Refer to Sections 13 & 14
OR OTHER
ACCEPTABLE
MECHANICAL
FASTENING
BAR-JOIST CLAMP
UHE / EIH I&O Manual
IM100205
RD: MAY 2013
RL: 03D
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