Schwank 2-Stage Series User Manual
Page 12
12
SET(U)-F / ITT(U)-F Manual
IM091221
RD: FEB 2014
RL: 8B
*
RECOMMENDED MOUNTING HEIGHTS are typical to provide optimum comfort in general
space heating applications. Variance to these typical heights can occur in some applications:
Higher mounting heights due to structure or application requirements
Lower mounting heights for area or ‘spot’ heat, or in areas with greater infiltration losses
(near overhead doors, etc)
IMPORTANT: Single or multiple heater placement must be such that continu-
ous operation of heater(s) will not cause combustible material or materials in
storage to reach a temperature in excess of ambient temperature plus 90F°
(50C°).
It is the installer’s responsibility to ensure that building materials with a
low heat tolerance which may degrade at lower temperatures are pro-
tected to prevent degradation. Examples of low heat tolerance materials
include vinyl siding, fabrics, some plastics, filmy materials, etc.
Refer to “Clearance to Combustibles” information on pages 6 to 8, and
Figure 1 and Table 1.
MODEL
“Straight” or
“U-Tube”
MOUNTING
HEIGHT
ft (m)
MAXIMUM
DISTANCE
BETWEEN
HEATERS
ft (m)
DISTANCE – OUTSIDE WALL
TO HEATER LONG AXIS
(PARALLEL TO WALL) IN “FEET”
HORIZONTAL
ft (m)
ANGLE
SET / ITT 200/140
18 – 25 (6 - 8)
50 (15)
17 – 25 (5 - 8)
MINIMUM =
COMBUSTIBLE
CLEARANCE
BEHIND
(refer to Table 1)
SET / ITT 175/125
18 – 25 (6 - 8)
50 (15)
17 – 25 (5 - 8)
SET / ITT 155/110
16 – 21 (5 - 7)
45 (14)
15 – 20 (5 - 7)
SET / ITT 130/90
15 – 21 (5 - 7)
40 (12)
15 – 20 (5 - 7)
SET / ITT 110/75
13 – 19 (4 - 6)
35 (11)
13 – 18 (4 - 6)
SET / ITT 100/70
13 – 19 (4 - 6)
35 (11)
13 – 18 (4 - 6)
SET / ITT 80/60
10 – 16 (3 - 5)
30 (9)
12 – 16 (4 - 5)
TABLE 2: GUIDELINES FOR HEATER PLACEMENT
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° elbows per heater. The use of elbows reduces the total maximum
vent allowable. (See Section 11 : Flue venting)