Reznor VR Unit Installation Manual - Manual (Page 21)

Form I-VR, P/N 205202 R13, Page 20
Angle Reflectors on Straight Systems or Angle “U” Configuration Systems
45° Hanging Hole
30° Hanging Hole
15° Hanging Hole
15° Hanging Hole
30° Hanging Hole
45° Hanging Hole
End of wire with sharper 45° bend
must be at the lower side.
Instructions for Angling Reflectors on a
Straight System:
1) If the tube brackets are fastened tightly, loosen
the nuts so that the “U” bolt will rotate with the
wire retainer.
2) Move the “S” hook to another hole in the
hanger bar. The first hole will angle the reflector
15°, the second 30°, and the third 45°. Adjust
chain length as needed.
3) Verify that the end of the wire retainer on the
lower side is the one with the sharper (45°)
bend. If not, remove the retainer wire and
reverse it.
4) Verify compliance with the requirements above.
Tighten the nuts on all tube brackets.
FIGURE 22 - Adjust reflector angle by changing the location of the “S” hook on the
hanger bar.
6.2.5 Recheck
Couplings and Tube
Brackets, Level the
System, Check the
Chains, and Close
“S” Hooks
Verify that all couplings and tube brackets are tightened securely.
Tubes must be level. Use a spirit level and adjust the turnbuckles or chain
links. Chains must be plumb with the suspension point.
Close all “S” hooks being careful not to change the chain length.
Straight systems should be straight; systems with “L” tubes should be at right
angles; and “U” shaped systems should be parallel.
6. Mechanical
(cont’d)
6.2.4 Install Reflectors and Optional Side Shield and/or End
Covers (cont’d)
6.2 Assemble and
Suspend the
Heater (cont’d)
6.3 Gas Piping and
Pressures
All piping must be in accordance with requirements outlined in the National
Fuel Gas Code NFPA 54 / ANSI Z223.1 (latest edition) or CAN/CSA-B149.1
(latest edition). Gas supply piping installation should conform with good prac-
tice and with local codes.
Heaters for natural gas are orificed for operation with gas having a heating
value of 1000 (± 50) BTU per cubic ft. If the gas at the installation does not
meet this specification, consult the factory for proper orifice.
Gas Supply Pressure Table
BTUH Input Gas Type
Supply Pressure
Minimum Maximum
50,000 - 150,000 Natural 4.5” w.c. 14” w.c.
175,000 - 200,000 Natural 6” w.c. 14” w.c.
50,000 - 200,000 Propane 11” w.c. 14” w.c.
• Reflectors on straight systems with a side shield may be angled 15° or 30°.
The side shield must hang vertically.
• Reflectors on “U” systems without a side shield may be angled 15°, 30° or
45° or 15° or 30° with a side shield. Follow option installation instructions.
• If the system includes an “L” heat exchanger tube, the reflectors cannot be
angled.
The gas supply must have sufficient pressure to
supply the burner plus any other gas-fired appli-
ances. Gas supply pressures required (measured
with a manometer) are listed in the table on the
left.