4000-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
112 of 154
SECTION 20: DIRECT FIRED BURNER
Yo
u
r
u
nit
w
ill be eq
u
ipped
w
ith a direct fired b
u
rner man
u
fact
u
red by either Midco International or Maxon
Corporation. Please cons
u
lt the specification sheet pro
v
ided
w
ith yo
u
r air handler to confirm the
man
u
fact
u
rer of the b
u
rner s
u
pplied
w
ith it.
Man
u
fact
u
red by Midco International
®
, Inc., the HMA-2A 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.
Содержание 4044
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