S
ERIES
2000 I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
58
SECTION 1
8
: DIRECT FIRED BURNER
The HMA-2A b
u
rner is
u
sed for nat
u
ral gas and propane (LP). The b
u
rner combines the t
w
o main
ingredients needed for proper comb
u
stion air (oxygen) and f
u
el (gas
w
hether nat
u
ral or man
u
fact
u
red). In
this b
u
rner ra
w
gas is deli
v
ered to the b
u
rner ports at lo
w
press
u
re. The air passing across the b
u
rner is
maintained bet
w
een 2,500 and 3,200 feet per min
u
te. The arrangement and shape of the air holes in the
baffles that s
u
rro
u
nd the b
u
rner pro
v
ide the proper amo
u
nt of air for proper comb
u
stion for all of the firing
rates.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be
hot after operation.
Explosion Hazard
Leak test all compo-
nents of gas piping
before operation.
Gas can leak if piping
is not installed
properly.
Do not high pressure
test gas piping with
equipment connected.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
More than one
disconnect switch may
be required to
disconnect electric from
heater.
Heater must be
connected to a properly
grounded electrical
source.
Carbon Monoxide Hazard
Heaters installed
unvented must be
interlocked with sufficient
building exhaust.
Heaters must be installed
according to the
installation manual.
