SECTION 9: M
ULTIBURNER
H
EATER
I
NSTALLATION
33 of 91
9.2 Multiburner System Design Re
q
uirements
A CTHN m
u
ltib
u
rner system has a n
u
mber of radiant
t
u
be sections interconnected by manifold t
u
be to a
p
u
mp to form a complete system. Reflectors can be
u
sed over the manifold t
u
be b
u
t are not req
u
ired.
The system design parameters are s
u
ch that the
manifold sections are not s
u
bjected to condensate
w
hen the system is f
u
lly heated
u
p. It is req
u
ired that
heat-treated al
u
minized or coated t
u
bing is
u
sed for
the manifold to increase system life and to handle
initial condensation d
u
ring start-
u
p. Damper
co
u
plings may be necessary to balance system
vac
uu
m.
Design req
u
irements for a CTHN m
u
ltib
u
rner system
are s
u
.
CTHN m
u
ltib
u
rner heaters are typically shipped as
b
u
rner packages and t
u
be and accessory packages.
The t
u
be and accessory packages contain eno
u
gh
t
u
be, reflector and hanging parts for the radiant
section of one CTHN heater. Elbo
w
s, tees, manifold
t
u
be, p
u
mps, controls, damper co
u
plings and any
other parts
u
sed beyond the b
u
rner, radiant t
u
be and
reflector m
u
st be p
u
rchased separately. See
w
of a simple CTHN
m
u
ltib
u
rner system. Depending on system
req
u
irements, CTHN m
u
ltib
u
rner systems may be
controlled by a relay system.
FIGURE 20: Typical CTHN Multiburner System Installation
T
T
Pressure Switch
Pump
Exhaust to
Outside
Drawing
N
ot to Scale
Zone 2 Thermostat
Zone 1 Thermostat
Cross
Tee
Radiant Tu
b
e
Manifold Tu
b
e
Optional Reflector
Burners
Tur
b
ulator (if re
q
uired)
SPST
DPST
SPST/DPST Transformer Relay
For
w
iring
