General Information
CLCH-SVX08C-EN 7
Description
The gas heat section consists of a drum-and-tube heat
exchanger, burner, gas train components, and a control
panel for electrical connections. It is an integral part of the
entire air-handling system.
An access door is provided for service and maintenance of
the burner and gas train components.
The gas heat section must be in a blow-thru position
downstream from the supply fan. Downstream sections
must be separated by a blank access section and discharge
temperatures must be controlled so as not to exceed the
temperature limits of components in the downstream
sections.
Depending on the heater size, an external vestibule that
extends the width of the gas heat section may be used to
house the burner and gas train components (see Figure 2).
The external vestibule, if required, ships attached to the
gas heat section. Some heaters have gas train
components in an internal vestibule (see Figure 3). Refer
to Table 2 for vestibule locations.
Figure 2. Gas heat section with external vestibule Figure 3. Gas heat section with internal vestibule
Table 2. Vestibule locations
Unit Size
Gas Output
(MBh)
Vestibule
Type Unit Size
Gas Output
(MBh)
Vestibule
Type Unit Size
Gas Output
(MBh)
Vestibule
Type
6 200 Ext 35 320/360 Int 66 700 Int
6 300 Ext 35 560 Int 66 860 Int
8 200 Ext 35 700 Int 66 1000 Int
8 300 Ext 35 860 Int 66 1250 Int
10 200 Ext 35 1000 Ext 66 1500 Int
10 320/360 Ext 35 1250 Ext 66 1750 Int
12 200 Int 35 1500 Ext 66 2000 Ext
12 320/360 Ext 35 1750 Ext 66 2400 Ext
14 200 Int 40 560 Int 80 860 Int
14 320/360 Ext 40 700 Int 80 1000 Int
17 200 Int 40 860 Int 80 1250 Int
17 320/360 Ext 40 1000 Ext 80 1500 Int
17 560 Ext 40 1250 Ext 80 1750 Int
17 700 Ext 40 1500 Ext 80 2000 Ext
21 200 Int 40 1750 Ext 80 2400 Ext
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