Reznor VR Unit Installation Manual - Manual (Page 10)

Form I-VR, P/N 205202 R13, Page 9
6. Mechanical
 Each straight tube section must have a suspension point. Straight sections
adjacent downstream to a “U” or “L” tube require two suspension points.
 There must be a suspension point within 12 inches (305mm) of every
coupler.
 Since the heater must be level, a turnbuckle is recommended at each
suspension point. Turnbuckles must be of steel or malleable iron. Use
either an optional turnbuckle kit or field-supplied equivalent. Turnbuckle
Option 15-22 Kits include the quantity of turnbuckles required by length of
heater.
 Refer to Paragraph 2 for recommended minimum mounting heights. The
installer is responsible for properly and adequately fastening the chains
to the building and supporting the weight of the heater. Depending on
the type of building construction, either attach the chain support directly
to the building or attach and extend a support to the location needed.
SUPERSTRUT ® brackets or a comparable metal strut material is well
suited as a support structure that requires numerous suspension points.
Straight System Length Expansion
ft M inches mm
70 ft 21.3 2-3/4 70
60 ft 18.3 2-3/8 60
50 ft 15.2 2-1/8 54
40 ft 12.2 1-7/8 48
30 ft 9.1 1-1/2 38
20 ft 6.1 1-1/8 29
6.1 Prepare the Burner/Control Box
There are very important steps that must be followed to prepare, assemble,
and suspend these tubular radiant heaters. Preparing the heater, suspension,
and field assembly are the responsibility of the installer. Follow all instructions
carefully.
All burner/control boxes require some field preparation. The type of preparation
depends on how the unit was ordered and where it will be installed. Determine
which of these two situations match your application and follow the appropriate
instructions. (Refer to Paragraph 3 for explanation on packaging.)
• The unit was ordered as a specific size OR as a VR 75/100, VR
125/150, or VR 175/200 and is being installed as a Size 75, 125, or 175.
Proceed to STEP 2) of the Preparation Instructions. (Skip STEP 1.)
• The unit was ordered as a VR 75/100, VR 125/150, or VR 175/200 and
is being installed as a Size 100, 150, or 200.
Proceed to STEP 1) of the Preparation Instructions. Complete both STEP 1
and 2.
Preparation
INSTRUCTIONS:
STEP 1) Change Components to Field Convert the Model VR
Burner/Control Box Size 75,000 to 100,000; Size 125,000 to
150,000; or Size 175,000 to 200,000.
Parts Required: Conversion kit shipped with the burner/control box. All kits
include a burner orifice, a combustion air restrictor plate, and conversion label.
A Size 200 kit also includes a pressure switch.
1. Conversion Size Label - Fill-in the label stating that the burner/control box
has been converted to either a Size 100,000, 150,000 or 200,000.
2. Change Air Restrictor Plate - Refer to FIGURE 4 and identify the com-
bustion air restrictor plate on the side of the burner box. Remove the three
or four nuts holding the factory-installed restrictor plate; save the nuts and
discard the restrictor plate. Using the same nuts, attach the combustion air
restrictor plate shipped in the parts bag.