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Form I-VR (10-14), P/N 205202 R14, Page 6
4.1 Configuration
Requirements
Depending on the length and size of the heater, the heat exchanger sections
may be installed in various configurations. Optional “L”-shaped, 5-foot, and
“U”-shaped heat exchanger tubes are available to adapt the heaters to these
configurations (Option UC2 for “L”; Option UB3 for “U”; Option UA1 for 5-foot
heat exchanger tube).
Model VR/GVR heaters may be installed in the configuration lengths shown
in the table on page 7. Only straight tubes are used to identify length. The
combustion chamber is always the first 10 ft (3.1M) length. The straight heat
exchanger tubes represent each additional 10-ft (3.1M) or 5-ft (1.5M)
Comply with the requirements listed below and the lengths in the table.
• Sizes 100 and 125 require
15 ft (4.6M) of straight tube length before installing an
optional “U” or an “L” tube.
• Size 150 requires 20 ft (6.1M) of straight tube length before installing an optional
“U”, “L”, or 5-ft (1.5M) tube.
• Sizes 175 and 200 require 30 ft (9.1M) of straight tube length before installing an
optional “U”, “L”, or 5-ft (1.5M) tube.
• Maximum of one “U” tube per system (do not use with “L” tubes).
• Maximum of two “L” tubes per system (do not use with “U” tube)
• Maximum of two 5-ft (1.5M) tubes; 5-ft tubes may be used in a layout with a “U” or
“L” tube
• On a “U” configuration, the straight tube length on the burner side of the “U” must
be equal to or longer than the tube length on the exhaust side.
• Exhaust tube must always be a 10-ft (3M) tube.
4. Configurations, Dimensions, and Clearances
FIGURE 1 - Tube
Cartons include
Tubes, Reflectors,
Hangers, Brackets,
Couplings, and
Hardware
Important NOTE:
Before
installation, wipe any
excess corrosion inhibitor
from the heat exchanger
tubes. Failure to do so
could result in excessive
smoke from the surface
of the tubes on first
startup.
3. Uncrating/
Packaging
(cont’d)
CK11) and/or a turnbuckle kit (Option CK12-18) or field-supplied hardware. See sus -
pension requirements in Paragraph 5.)
Accessory Cartons - All field-installed options are shipped in separate car -
Packaging Scheme for 10’ Straight Tubes
Pkg ID* Pkg P/N Contents
VRE 205204 (1) Combustion Chamber Tube; (1) Heat Exchanger Tube
VRF 205205 (1) Combustion Chamber Tube; (2) Heat Exchanger Tubes
VRG 205206 (2) Heat Exchanger Tubes
VRH 205151
(3) Heat Exchanger Tubes
Tube Packages Required by Length of System Each tube package includes
required hardware for tubes and
reflectors . Extra hardware packages
are available as parts.
Length Qty Pkg P/N Qty Pkg P/N
20 ft system requires 1 205204 -- --
30 ft system requires 1 205205 -- -- Pkg ID Pkg P/N Hardware Pkg
40 ft system requires 1 205204 1 205206
VRE
205204 P/N 209401
50 ft system requires 1 205204 1 205151 VRF 205205 P/N 209402
60 ft system requires 1 205205 1 205151 VRG 205206 P/N 209403
70 ft system requires 1 205205 2 205206 VRH 205151 P/N 209404
tons. Be sure all parts are at the installation site.
WARNING: Do not
install a heater in a
length or configu -
ration that is not
permissible for the
Size. See Hazard
Levels, page 2.
Refer to Form T-VR-
CNFG (available from
your distributor), for a lay -
out view of all allowable
configurations.
* Tube Package ID is the
same for Model VR and
Model GVR heaters.