12
UHE
-
F / EIH
-
F I&O Manual
IM100205
RD: APR 2019
RL: 02C
7.
SYSTEMS INCORPORATING 90° ELBOWS AND 180° ELBOWS
The radiant tube heater can be installed in configurations as illustrated in FIGURE 4 (below)
with a maximum of two 90° tube system elbows per heater. The use of elbows reduces the to-
tal maximum vent allowable by 5 feet for each 90°. (See Section 11 : Flue venting)
The 90° elbow kit (JS
-
0528
-
UE) is complete with one 90° elbow, one tube coupler, and one re-
flector end cap. For a 180° elbow two x 90° kits combine to create a 180°. The reflector must
be end
-
capped each side of an elbow
-
See FIGURE 6
IMPORTANT
:
Location of Elbow vs. Input
: A minimum length of straight radiant tube must be
connected to the burner prior to any elbow as follows:
•
200 Mbh (60 kW) = 30 ft (7.6 m) prior to elbow
•
160 Mbh (45 kW) & 130 Mbh (38 kW) = 20 ft (6 m) prior to elbow
•
90 Mbh (23 kW) = 15 ft (4.6 m) prior to elbow
•
60 Mbh (18 kW) a minimum of 10 ft (3 m) straight tube before elbow.
System Configuration
1 Straight line
2 “
U
”
tube with 2 x 90° elbow kits
3 “
L
”
tube with one 90° elbow kit
4 Twinned tubes into common TEE flue vent
FIGURE 3 SYSTEM ELBOW KIT
FIGURE 4 SYSTEM CONFIGURATIONS
4”
x
4”
x
6”
Vent Tee
JS
-
0508
-
UL
See
Figure 8
for installed
orientation dimensions
