21
2.2.4 Couplers
There are two types of 3” and 4” couplers for
joining radiant tubes, bends or optional bend
kits as detailed in Table 8 opposite.
A high temperature stainless steel coupling.
Slide the coupler over the tube ensuring that
the rivet stop has butted up to the tube ends.
Using an Allen wrench, tighten the pins.
Moving between the two set pins, tighten both
ensuring that equal pressure is applied to each
set pin in turn. Complete assembly by drilling
and screwing self tapping retention zip screws.
A standard stainless steel coupling which is
used for all other connections.
Slide the coupler over the tube ensuring that
the tube stop has butted up to the tube ends.
Using a 5/16” drive or flat blade screwdriver,
tighten the bolts.
Moving between the two band coupling bolts,
tighten both ensuring that equal pressure is
applied to each in turn. Complete assembly by
drilling and screwing self tapping retention zip
screws.
DO NOT OVERTIGHTEN!!
2.2.5 Reflectors.
U-Tube models only.
After removing the
protective plastic coating, slip the first reflector
through the brackets until the locating slots align
with the type A bracket fixing points.
* Note: the first suspension bracket may not
necessarily be a fixed type ‘A’ bracket.
Slide the next reflector backwards through the
brackets and overlap the existing reflector until
the locating slots line up with the type ‘A’
bracket.
Continue along the heater where necessary.
Table 8. Coupler positions (from burner)
STAINLESS
STEEL
SPACER
SELF TAPPING ZIP
SCREWS
DRAW BAND COUPLING
BOLTS
Draw Band Coupling
Bolts
Stainless
Steel
Spacer
Self Tapping Zip
Screws
All reflectors must be positioned/
attached to the brackets exactly as
detailed in the assembly drawings.
U-Tube 1st coupler 2nd coupler
40-100
Standard
Standard
125-200 Hi-temp Standard
Linear 1st coupler 2nd coupler
125-150 Hi-temp Standard
170-200 Hi-temp Hi-temp
40-100
Standard
Standard
Remainder
Standard
Standard
Remainder
Standard
Standard
Standard
At this point raise the tube assembly into
position and suspend from previously
fixed chains (2/0 min. gauge), or attach to
wall mounting brackets. Wall mounting
brackets must support heater at an angle of
inclination of 45° ± 10°. Longer tube
assemblies may be raised in more than one
sub-assembly with final tube connection
made in the air.
It is recommended that the heater be
suspended to slope slightly - refer to note in
figure 1 for details
All reflectors are shipped with a
protective plastic coating which
MUST be removed before use.