SECTION 9: M
ULTIBURNER
H
EATER
I
NSTALLATION
29
9.2 Multiburner System Design Requirements
A CTHN multiburner system has a number of radiant
tube sections interconnected by manifold tube to a
pump to form a complete system. Reflectors can be
used over the manifold tube but are not required.
The system design parameters are such that the
manifold sections are not subjected to condensate
when the system is fully heated up. It is required that
heat-treated aluminized or coated tubing is used for
the manifold to increase system life and to handle
initial condensation during start-up. Damper
couplings may be necessary to balance system
vacuum.
Design requirements for a CTHN multiburner system
are summarized
on Page 30, Table 10
.
CTHN multiburner heaters are typically shipped as
burner packages and tube and accessory packages.
The tube and accessory packages contain enough
tube, reflector and hanging parts for the radiant
section of one CTHN heater. Elbows, tees, manifold
tube, pumps, controls, damper couplings and any
other parts used beyond the burner, radiant tube and
reflector must be purchased separately. See
Figure
18
for a general overview of a simple CTHN
multiburner system. Depending on system
requirements, CTHN multiburner systems may be
controlled by either a ROBERTS GORDON
®
System
Control (shown) or by a relay system.
FIGURE 18: Typical CTHN Multiburner System Installation
T
T
Pressure Switch
System Control (optional)
Pump
Exhaust to
Outside
Drawing Not to Scale
Zone 2 Thermostat
Zone 1 Thermostat
Cross
Tee
Radiant Tube
Manifold Tube
Optional Reflector
Burners
Turbulator (if required)
