*For complete installation instructions, see the General Manual that accompanied this piece. Also available at www.reverberray.com.
Warranty registration options:1. Register online at www.reverberray.com/warranty2. Complete this page and fax to Detroit Radiant Products Co.3. Complete this page and mail to Detroit Radiant Products Co.
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual*
WARNING: This heater must be installed and serviced by trained gas installation and service personnel only!Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.Protect yourself and others by observing all safety information. Retain instructions for future reference.
!
* Model requires 5EA-SUB accessory package.
Qty. Mode l #Ga s Type (circle one ) MBTU's
Stra ight Length
U-Tube Length W eight
Typica l Mount He ight
Com bustion Cham be r
Radiant Em itte r Tube
"Type" Tube Pkg #1
"Type " Tube Pkg. #2
Ba ffle P ie ces
HL-2 20-65 N or LP 65 / 50 21'-7' 13'-0" 120 # 9'-14' A luminized 4" Aluminized 20-4 Alum N/A 5HL-2 20-75 N or LP 75 / 50 21'-7' 13'-0" 120 # 10' - 15' A luminized 4" Aluminized 20-4 Alum N/A 5HL-2 20-100 N or LP 100 / 65 21'-7' 13'-0" 120 # 11' - 18' A luminized 4" Aluminized 20-4 Alum N/A 5HL-2 30-65 N or LP 65 / 50 31'-3' *17'-8" 160 # 10' - 15' A luminized 4" Aluminized 30-4 Alum N/A 4HL-2 30-75 N or LP 75 / 50 31'-3' *17'-8" 160 # 11' - 18' A luminized 4" Aluminized 30-4 Alum N/A 4HL-2 30-100 N or LP 100 / 65 31'-3' *17'-8" 160 # 12' - 20' A luminized 4" Aluminized 30-4 Alum N/A 5HL-2 30-125 N or LP 125 / 95 31'-3' *17'-8" 160 # 13' - 23' A luminized 4" Aluminized 30-4 Alum N/A 5HL-2 40-65 N or LP 65 / 50 40'-11' 22'-8" 190 # 11' - 18' A luminized 4" Aluminized 40-4 Alum N/A 2HL-2 40-75 N or LP 75 / 50 40'-11' 22'-8" 190 # 11' - 18' A luminized 4" Aluminized 40-4 Alum N/A 2HL-2 40-100 N or LP 100 / 65 40'-11' 22'-8" 190 # 12' - 20' A luminized 4" Aluminized 40-4 Alum N/A 4HL-2 40-125 N or LP 125 / 95 40'-11' 22'-8" 190 # 13' - 23' A luminized 4" Aluminized 40-4 Alum N/A 4HL-2 40-150 N or LP 150 / 100 40'-11' 22'-8" 190 # 14' - 25' Titanium Coated 4" Aluminized 40-4 Titan N/A 4HL-2 40-175 N or LP 175 / 125 40'-11' 22'-8" 190 # 15' - 27' Titanium Coated 4" Aluminized 40-4 Titan N/A 4HL-2 50-100 N or LP 100 / 65 50'-7' *27'-4" 235 # 15' - 27' A luminized 4" Aluminized 40-4 Alum 10-4 A lum 2HL-2 50-125 N or LP 125 / 95 50'-7' *27'-4" 235 # 15' - 27' A luminized 4" Aluminized 40-4 Alum 10-4 A lum 4HL-2 50-150 N or LP 150 / 100 50'-7' *27'-4" 235 # 15' - 27' Titanium Coated 4" Aluminized 40-4 Titan 10-4 A lum 4HL-2 50-175 N or LP 175 / 125 50'-7' *27'-4" 235 # 16' - 30' Titanium Coated 4" Aluminized 40-4 Titan 10-4 A lum 2HL-2 50-200 N or LP 200 / 145 50'-7' *27'-4" 235 # 17' - 35' Titanium Coated 4" Aluminized 40-4 Titan 10-4 A lum 2HL-2 60-125 N or LP 125 / 95 60'-3' 32'-4" 265 # 16' - 30' A luminized 4" Aluminized 40-4 Alum 20-4 A lum 2HL-2 60-150 N or LP 150 / 100 60'-3' 32'-4" 265 # 16' - 30' Titanium Coated 4" Aluminized 40-4 Titan 20-4 A lum 2HL-2 60-175 N or LP 175 / 125 60'-3' 32'-4" 265 # 16' - 30' Titanium Coated 4" Aluminized 40-4 Titan 20-4 A lum 2HL-2 60-200 N or LP 200 / 145 60'-3' 32'-4" 265 # 17' - 35' Titanium Coated 4" Aluminized 40-4 Titan 20-4 A lum 2HL-2 70-175 N or LP 175 / 125 69'-11" *37'-2" 300 # 19' - 42' Titanium Coated 4" Aluminized 40-4 Titan 30-4 A lum 2HL-2 70-200 N or LP 200 / 145 69'-11" *37'-2" 300 # 19' - 42' Titanium Coated 4" Aluminized 40-4 Titan 30-4 A lum 2
0 MOUNTING ANGLE
TOP
45 MOUNTING ANGLE
BELOW
FRONT BEHIND
TOP
BELOW
SIDE SIDE
0 W/1 SIDE SHIELDTOP
0 W/2 SIDE SHIELDS
BELOW
SIDE SIDE
BELOW
TOP
FRONT BEHIND
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
HL-2 Series
Failure to comply with the stated clearancesto combustibles could result in personal injury,death and/or property damage.
This heater should be installed so that theminimum clearances to vehicles, as markedon the heater, will be maintained. If vehiclelifts are present, ensure that these clearanceswill be maintained from the highest raisedvehicle.
2
! WARNING!
! WARNING!
! WARNING!
! WARNING!
! WARNING!
This heater must be installed and serviced bytrained gas installation and service personnelonly. Read and understand these instructionsthoroughly before attempting to install, operateor service this heater. Failure to comply couldresult in personal injury, asphyxiation, death,fire, and/or property damage. Retain theseinstructions for future reference.
FRONT BEHIND0º 9 9 6 60
45º 39 8 10 60W/1 side shield 0º 29 8 6 60
W/2 side shields 0º 9 9 6 6020 ft from burner 0º 7 7 6 30
0º 14 14 6 6645º 39 8 10 66
W/1 side shield 0º 29 8 6 66W/2 side shields 0º 16 16 6 6620 ft from burner 0º 7 7 6 30
0º 20 20 6 7645º 58 8 10 76
W/1 side shield 0º 42 8 6 76W/2 side shields 0º 20 20 6 7620 ft from burner 0º 7 7 6 30
0º 24 24 6 8145º 58 8 10 81
W/1 side shield 0º 42 8 6 81W/2 side shields 0º 23 23 6 8120 ft from burner 0º 11 11 6 44
0º 34 34 6 9245º 63 8 10 92
W/1 side shield 0º 50 8 6 92W/2 side shields 0º 30 30 6 9220 ft from burner 0º 11 11 6 44
0º 41 41 6 9445º 63 8 10 94
W/1 side shield 0º 54 8 6 94W/2 side shields 0º 30 30 6 9420 ft from burner 0º 11 11 6 44
CLEARANCES TO COMBUSTIBLES (IN.)MODEL NO.
SIDETOP BELOWMOUNTING
ANGLE
HL2 (40,50,60,70) - 175 [N,P]
HL2 (50,60,70) - 200 [N,P]
HL2 (20,30,40) - 65, 75 [N,P]
HL2 (20,30,40,50) - 100 [N,P]
HL2 (30,40,50,60) -125 [N,P]
HL2 (40,50,60) - 150 [N,P]
HL-2 Series Mechanical Instructions
NOT FOR RESIDENTIAL USE!Do not use in the home, sleeping quarters,
attached garages, etc.
In locations used for the storage of combustiblematerials, signs must be posted to specify themaximum permissible stacking height tomaintain the required clearances from the heaterto the combustibles. Signs must either be postedadjacent to the heater thermostats or intheabsence of such thermostats, in a conspicuouslocation.
This is not an explosion-proof heater. Wherethere is the possibility of exposure to flammablevapors, consult the local fire marshal, the fireinsurance carrier and other authorities forapproval of the proposed installation.
! WARNING!
3
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
HL-2 Series Mechanical Instructions
Product SummaryHL-2 Series heaters are available from 20 to 70 foot, 65,000 to 200,000 BTU’s, natural or LP gas. HL-2Series are positive pressure, two-stage heaters that feature aluminized steel for it’s radiant pipes.
Operational FeaturesHL-2 Series heaters require a 24 Volt, two-stage thermostat to operate. Each heater has a round terminalplug (or yellow cord) that accepts three 1/4 in. insulated spade terminals for the thermostat wiring. Do notinstall 120V to this 24V connection.
There are two versions of the HL-2 Series. The standard version comes without a relay board (HLRB) andthe other is supplied with a relay board (HLRB) installed. A HL-2 Series unit without a relay board (HLRB)supplies it’s own control voltage and is identified by the white band located around the terminal plug. If unitsare common vented or if two or more models are to be controlled by a single thermostat, they must befactory assembled with relay boards (HLRB) and installed using an external transformer (field supplied) asshown on page 6. A HL-2 Series unit with a relay board (HLRB) installed is identified by the orange bandaround the spade terminal.
On stainless steel heaters, units with a relay board (HLRB) will be labeled accordingly. All models assembledwith a HLRB reference the suffix “D” on the AGA rating plate.
Specific Mechanical InstructionsBe sure to indentify the titanium coated combustion chamber (150-200 MBTU/H) and place as the first tubesection directly following the burner box. The identification sticker found on the swagged end of the tubingwill identify the titanium coated combustion tube.
175,000 and 200,000 BTU/H Models must be installed with a stainless steel tube clamp at the second jointof the exchanger between the first and second radiant tubes.
Note baffle quantities for your model and place baffles in the last tubes (farthest from the burner) as shownon pages 13-14 of the general manual, and below (*).
This supplement is designed to address the specifics of the HL-2 Series - see page 12 for product features.
♦ Consult the general manual for venting instructions.
♦ For unvented operation, there must be a positive airdisplacement of at least 4.0 CFM per 1000 BTU/H for naturalgas or 4.5 CFM per 1000 BTU/H for LP gas. WVE-4termination cap must also be used.
Theory of Operation
Standby:The Micro 60U24 control continually checks for internal faults,safety circuit integrity, and relay contact positioning.
Starting Circuit:Upon a call for heat, the control will verify that the differentialsafety pressure switch is in the proper position. The fan relayenergizes the fan, an operational static pressure is achievedand the normally open differential pressure switch will close,initiating the ignition sequence. The glow-bar is powered andafter 45 seconds the main gas valve opens. If flame is notestablished the heater will attempt to re-ignite for a total ofthree trials for ignition and then proceed to lockout.
First Stage Running Circuit:After ignition the flame-rod monitors the main burner flame. Ifflame is lost, the control acts to close the gas valve within onesecond and a new trial sequence, identical to the start upsequence, is initiated. If proof is not established within 8.5seconds, the unit will retry 2 additional ignition sequences andthen proceed to hard lock-out. The control can be reset byinterrupting the power source or at the thermostat.
Second Stage Running Circuit:Stage two on the gas valve is powered directly from the secondstage of the thermostat. In order for the second stage to flowthe higher output, the first stage has to be energized as well.The thermostat will determine which stage is required to maintainthe desired comfort level.
Shut Down:When the thermostat is satisfied the fan will enter into a 2minute post-purge cycle.
Soft Lockout:In the event of an external interruption (wind, gas, etc.) theheater will go into a “soft-lockout” feature. In this mode theheater will attempt a normal start-up after approximately 15minutes. In the event of continued problems, the heater will gointo a hard lock-out mode.
Lockout Codes:In event of a component failure, a red LED diagnostic lightlocated on the burner box end panel will flash a code identifyingthe fault. Lockout codes are summarized in the table below.Some fault codes have a time delay before the LED will flash.Refer to the FAULT CODE DELAY on the chart to see theapproximate time delay.
Note: Hard lockout LED CODE will appear upon completionof the soft lockout sequence of operation.
LED CODE FAULT STATUS FAULT CODE DELAYInitial f lash o n po wer up,
then steady o ff No rmal o peratio n Immediate
Steady o n M o dule failure / Internal fault Immediate
1 flash Ignitio n failure 30-32 minutes
2 o r 3 flashes A P S - No te: fan / intake / exhaust 10-12 minutes
4 flashesSo leno id valve fault / Leaky valve
/ Flame amplifier faultImmediate
No flash o n 117V start up Transfo rmer fault Immediate
5
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
Internal Wiring Diagrams
LLWT38
LIGHTS
MICRO 60U-24 BLOCK DIAGRAM
120VAC
L1
L2
T'STATTERMINAL
2-STAGE T'STAT(FIELD SUPPLIED)
OFF
NOGAS VALVE
INDICATOR
BLOWER
IGNITOR
FLAME ROD
TRANSFORMER
PRESSURE SWITCH
STATUSLIGHT
MICRO 60U-24
APS1 (NO)
IGNITION MODULE
MICRO 60U-24
(FIELD SUPPLIED)
L2
FLAME ROD
IGNITOR
120V
24V
BLOWER
117L
HSI
HSI
FA
N MICRO 60U-24
TH 24V
LLWT38
GN
DMODULEIGNITIONA
PS2
APS
1A
PS1
APS
2V
ALV
EG
ND
117N
117N
PRESSURE SWITCH
L1 120VAC
MICRO 60U-24 LADDER DIAGRAM
T'STAT
INDICATORLIGHTS
APS1
GAS VALVE
PRO
BE
GN
D
2-STAGE T'STAT(FIELD SUPPLIED)
TERMINAL
(FIELD SUPPLIED)
TRANSFORMER
STATUSLIGHT
Additional wire needed on thermostats that require constant power.
T-stat
24v N Low High
1/4 spade terminals required - field supplied
Ground Screwon Burner Box
HL HEATERBURNER BOX
HILO
24V 21
(Observe Polarity)120 Volt Power
L1 L2
Note: If optional yellow control cord is installed then the following wire colors apply: 24v - Green Low - White High - Black
PANEL GROUND
White label
Note: If optional Black power cord is installed then L1 is Brown or Black and L2 is Blue or White.
Note: If optional yellow control cord is installed then the following wire colors apply: Neutral- Green Low - White High - Black
Additional wire needed on thermostats that require constant power.
EXTERNAL TRANSFORMER -FIELD SUPPLIED
T-stat
120 V
24V
HL HEATERBURNER BOX
LO
1
LO
N
HI
2
HL HEATERBURNER BOX
HI
(Observe Polarity)
L1L2
PANEL GROUND
120 Volt Power
24v N Low High
1/4 spade terminals required - field supplied
1
1
LO
N
N
2
HL HEATERBURNER BOX
2
HI
PANEL GROUND
PANEL GROUND
Orange label
Orange label
Orange label
Note: If optional Black power cord is installed then L1 is Brown or Black and L2 is Blue or White.
6
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
HL-2 SeriesField Wiring Diagrams
Single heater, single thermostat, no relay board (white label).
Multiple heaters, single thermostat, with a relay board (HLRB - orange label).
7
Alternative Wiring DiagramsHL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
LLWT39
LLWT39
MICRO 60U-24WITH HLRB RELAY BOARD
L1 120VAC
MICRO 60U-24 LADDER DIAGRAM - WITH RELAY BOARD
HL RELAY BOARD
PRESSURE SWITCHES
INDICATORLIGHTS
GAS VALVE
2-STAGE T'STAT(FIELD SUPPLIED)
120V
24V
120/24VTRANSFORMER(FIELD SUPPLIED)
MICRO 60U-24 BLOCK DIAGRAM - WITH RELAY BOARD
T'STATTERMINAL
(FIELD SUPPLIED)
LIGHTSINDICATOR
TRANSFORMER
IGNITOR
FLAME ROD
OFF
ONGAS VALVE
APS1 (NO)
HL RELAY BOARD
2-STAGE T'STAT(FIELD SUPPLIED)
L2
120/24VTRANSFORMER(FIELD SUPPLIED)
T'STATTERMINAL
BLOWER
PRESSURE SWITCHES
(FIELD SUPPLIED)
TRANSFORMER
THGN
D
GN
D
PRO
BE
IGNITOR FLAME
APS
1
GN
D24
V
APS
2V
AL
VE
117N
APS
2A
PS1
117N
HSI
MODULEIGNITION
MICRO 60U-24
117L
FAN
HSI
BLOWER
ROD
24V
120V
L2
LIGHTSTATUS
L1
120VAC
MICRO 60U-24IGNITION MODULE
STATUSLIGHT
8
Is t
he p
ower
at
the
heat
er 1
20V
?
Is t
he p
ower
acr
oss
the
left
and
cen
ter
term
inal
on t
he T
P-21
3-24
V p
lug
24V
?
Is t
he p
ower
acr
oss
the
24V
wire
on
the
circ
uit
boar
d an
d gr
ound
on
the
circ
uit
boar
d 24
V?
Find
the
sou
rce
of t
heel
ectri
cal
prob
lem
bet
wee
npa
nel
& h
eate
r.YE
S
NO
Is t
he p
ower
acr
oss
the
THw
ire o
n th
e ci
rcui
t bo
ard
and
grou
nd o
n th
e ci
rcui
tbo
ard
24V
?
YES
Is t
he i
nlet
or
the
outle
t of
the
uni
tob
stru
cted
? I
.e. i
ce, b
irds
nest
, dirt
, etc
.
YES
Che
ck f
or l
oose
wiri
ng o
r re
stric
tions
in
hose
con
nect
ions
to
the
pres
sure
sw
itch.
Are
the
y ok
?
NOR
epai
r w
iring
or
hose
conn
ectio
ns.
NOYE
S
YES
NO
Is th
ere
120V
on
the
prim
ary
side
of t
he e
xter
nal
tran
sfor
mer
?NO
Find
the
sou
rce
of t
heel
ectri
cal
prob
lem
bet
wee
npa
nel
& e
xter
nal
tran
sfor
mer
.
NO
Is t
here
120
V o
n th
epr
imar
y si
de o
f th
ein
tern
al t
rans
form
er?
NOEx
tern
al t
rans
form
er i
sfa
ulty
and
mus
t be
rep
lace
d.Th
e in
tern
altr
ansf
orm
er i
sfa
ulty
and
mus
t be
repl
aced
.
YES
NO
The
rela
y bo
ard
is f
aulty
and
mus
t be
rep
lace
d.
Doe
s th
e fa
nbl
ower
tur
non
?
NO
Is t
he c
ircui
tbo
ard
send
ing
120V
to
the
fan?
Doe
s th
eig
nito
r w
arm
up
and
glow
red?
Is t
he i
gnit
orp
hy
sic
all
yda
mag
ed?
NOR
epla
ce i
gnito
r.YE
S
NO
Che
ck v
olta
ge a
t ig
nito
r du
ring
the
igni
tion
seq
uenc
e (u
sual
ly 3
0-45
seco
nds
afte
r po
wer
to
heat
er).
Is
it12
0V?
NO
Is t
he r
esis
tanc
eth
roug
h th
e ig
nito
r45
-400
ohm
s?
YES
YES
YES
Is t
here
24V
on
the
seco
ndar
y si
de o
f th
eex
tern
al t
rans
form
er?
Is t
here
24V
to
the
ther
mos
tat?
YES
The
circ
uit
boar
d is
faul
ty a
nd m
ust
bere
plac
ed.
NOYE
S
NO
Find
sou
rce
of e
lect
rical
prob
lem
bet
wee
n th
e ex
tern
altr
ansf
orm
er a
nd t
herm
osta
t.YES
The
ther
mos
tat
or w
iring
is
faul
ty a
nd s
houl
d be
repl
aced
or
repa
ired.
The
circ
uit
boar
dis
fau
lty a
nd m
ust
be r
epla
ced.
YES
NO
*
Is t
he f
an o
bstru
cted
?
YES
NO
Circ
uit
boar
d is
fau
lty a
ndm
ust
be r
epla
ced.
Is t
here
24V
on
seco
ndar
ysi
de o
f tra
nsfo
rmer
?YE
S
NO
Tran
sfor
mer
is
faul
ty a
ndm
ust
be r
epla
ced.
Is t
he p
ower
acr
oss
the
mid
dle
(low
) te
rmin
al (
on t
he T
P-21
3-24
V p
lug)
and
gro
und
(asc
rew
on
the
burn
er b
ox)
24V
?
NO
Ther
mos
tat
or w
irin
g fr
omth
erm
osta
t to
hea
ter
is f
aulty
and
mus
t be
rep
lace
d.
Is t
here
24V
acro
ss th
e TH
and
grou
ndte
rmin
als
onth
e ci
rcui
tbo
ard?
YES
NO
Cor
rect
wiri
ng.YE
S
Rep
air
the
wir
ing
betw
een
the
tran
sfor
mer
and
the
TP-
213-
24V
plug
.
Turn
up
ther
mos
tat
NO
YES
Doe
s th
e he
ater
hav
e a
rela
y bo
ard?
Se
e pa
ge 6
of H
L-2
inse
rt fo
r de
tails
on h
ow t
o de
term
ine
ifhe
ater
has
a r
elay
boa
rd.
NO
Is th
e po
wer
acr
oss
the
left
term
inal
(on
the
TP-
213-
24V
plu
g) a
nd g
roun
d(a
scr
ew o
n th
e bu
rner
box)
24V
?
Is t
he c
ircu
it b
oard
send
ing
120V
to
the
fan?
YES
Is t
he f
an o
bstru
cted
?YE
S
NO
Is t
here
120
V o
n th
epr
imar
y si
de o
f th
etr
ansf
orm
er?
NO
Rep
lace
bad
circ
uit
boar
d. YES
Rem
ove
obst
ruct
ion.
YES
NO
Sh
ad
ed
bo
xe
sin
dica
tetr
oubl
esho
otin
gfo
r he
ater
s w
ith
Rel
ay
Boa
rds
(HLR
B) i
nsta
lled.
YES
HL-
2 V.
8/02
Tro
uble
shoo
ting
Flow
Cha
rt
The
fan
is f
aulty
and
mus
t be
rep
lace
d.
Is t
he p
ress
ure
switc
h st
uck
in t
he c
lose
d po
sitio
n.
YES
NOR
epla
ceSw
itch.
NOTh
e fa
n is
fau
lty a
ndm
ust
be r
epla
ced.
Rem
ove
obst
ruct
ion.
Is t
he p
ress
ure
switc
h st
uck
in t
he c
lose
d po
sitio
n.
NO
YES
Rep
lace
.
Rem
ove
obst
ruct
ion.
Aft
er 1
0-12
min
utes
of
non-
oper
atio
nha
s pa
ssed
, is
ther
e a
flash
cod
e fo
r A
SP-
1 fa
ilure
(2
or 3
fla
shes
)?R
epla
ce t
he p
ress
ure
switc
h af
ter
verif
ying
the
follo
win
g:
* B
affle
(s)
is i
n th
e tu
be(s
) fa
rthes
t
fro
m th
e bu
rner
.*
Hea
ter,
fan
blow
er, s
quirr
el c
age,
in
take
an
d ex
haus
t are
cle
an a
nd f
ree
f
rom
dirt
and
obs
truct
ions
.*
The
4” a
ir in
take
pip
e do
es n
ot
exc
eed
20 f
eet a
nd/o
r 2
elbo
ws.
* Th
ere
is n
ot a
neg
ativ
e pr
essu
re
expe
rienc
ed a
t th
e ar
ea o
f ai
r in
take
(i.
e. a
ttic
spac
e, h
igh-
win
ds, v
ery
tight
bui
ldin
g).
YES
WA
RN
ING
:B
ypas
sing
any
swit
ch i
s fo
r te
stin
gpu
rpos
es o
nly.
D
ono
t le
ave
swit
chby
pass
ed d
urin
gno
rmal
ope
rati
onor
hea
ter’
s bu
ilt-
insa
fety
mec
hani
sms
wil
l be
com
prom
ised
.
Rep
lace
circ
uit
boar
d.
NO
9
Afte
r ig
nito
r is
war
med
up,
doe
s ga
sva
lve
open
?NO
Test
for
24V
at
valv
edu
ring
va
lve
open
ing
peri
od
(usu
ally
30
-45
seco
nds
afte
r po
wer
to
the
heat
er).
Is
ther
e 24
Vto
val
ve f
or 8
sec
onds
?
NOPo
ssib
ly, t
he c
ircui
t boa
rdan
d/or
wir
ing
harn
ess
isfa
ulty
. T
hese
sho
uld
bere
plac
ed.
Che
ck to
mak
e su
re g
as p
ress
ure
isw
ithin
min
imum
and
max
imum
inp
uts,
as i
ndic
ated
on
AG
A b
urne
r ra
ting
labe
l. I
s ga
s pr
essu
re O
K?
YES
Cor
rect
prob
lem
.NO
Rep
lace
gas
valv
e.YE
S
YES
Doe
s th
e bu
rner
light
?
NOIs
the
gas
coc
k in
the
ON
pos
ition
?YE
S
Cor
rect
prob
lem
.
NOM
ake
sure
gas
line
s w
ere
purg
ed o
f ai
r.
YES
YES
Doe
s th
e bu
rner
stay
on?
NOD
oes
the
burn
er s
tay
on f
orap
prox
. 8
seco
nds
and
then
shut
off
?
YES
Is t
he h
eate
r pr
oper
ly g
roun
ded?
Is t
he h
eate
r’s
pola
rity
cor
rect
?YE
SW
ith m
icro
amm
eter
, ch
eck
DC
volta
ge a
t fla
me
rod.
Is
it
grea
ter
than
0.7
mic
roam
ps?
YES
Che
ck t
o m
ake
sure
flam
e se
nsor
wire
isO
K a
nd t
hen
repl
ace
circ
uit
boar
d.
NO
Sens
ing
rod
is f
aulty
or
flam
e is
wea
k.
Che
ck t
o m
ake
sure
hea
ter
is o
pera
ting
at p
rope
r ga
spr
essu
re a
s in
dica
ted
on A
GA
burn
er r
atin
g la
bel
and
then
repl
ace
sens
ing
rod
if ne
eded
.
NO
Cor
rect
pro
blem
.
NO
Doe
s th
e bu
rner
com
e on
and
the
ntu
rn o
ff i
mm
edia
tely
(1 o
r 2
seco
nds)
.
YES
Che
ck to
mak
e su
re th
at th
e ga
s pr
essu
reis
with
in m
inim
um a
nd m
axim
um i
nput
sas
ind
icat
ed o
n th
e A
GA
bur
ner
ratin
gla
bel.
Is
gas
pres
sure
OK
?
Cor
rect
prob
lem
.
NO
Pres
sure
sw
itch
may
be f
aulty
or
ther
e is
a re
stric
tion
in t
heex
haus
t.
YES
YES
NO
The
follo
win
g ca
n ca
use
the
heat
erto
shu
t do
wn:
* Im
prop
er g
roun
ding
* H
igh
win
ds*
Taki
ng c
ombu
stio
n ai
r fr
om t
he a
ttic
* D
irty
env
iron
men
t*
Baf
fle
impr
oper
ly p
ositi
oned
* Fl
uctu
atin
g ga
s pr
essu
re
Doe
s he
ater
sta
y on
unt
ilca
ll fo
r he
at e
nds?
YES Tr
oubl
esho
otin
g en
ds.
Che
ck to
mak
e su
re g
as p
ress
ure
isw
ithin
min
imum
and
max
imum
inp
uts,
as i
ndic
ated
on
AG
A b
urne
r ra
ting
labe
l. I
s ga
s pr
essu
re O
K?
If h
eate
r doe
s not
go
into
hig
h-fir
e mod
e, ch
eck
the f
ollo
win
g.O
n th
e ou
tsid
e of
the
hea
ter,
chec
k fo
r24
V a
cros
s C
OM
and
HIG
H o
n th
eTP
-213
-24V
plu
g.
Is t
here
24V
?NO
Rep
air o
r rep
lace
faul
tyw
irin
g or
the
rmos
tat.
The
rela
y bo
ard
is f
aulty
and
mus
t be
rep
lace
d.
Mea
sure
the
vol
tage
acro
ss th
e re
d w
ire o
nth
e re
lay
boar
d an
dG
ND
on
the
circ
uit
boar
d. I
s th
ere
24V
?Th
e va
lve
is f
aulty
and
mus
t be
rep
lace
d.
YES
NO
TE
: To
con
firm
the
hea
ter
is n
ot i
n hi
gh-f
ire
mod
e, c
heck
the
man
ifold
pre
ssur
e.
If 3
.5”
natu
ral
or 1
0” p
ropa
ne, t
he l
ight
is f
aulty
and
sho
uld
be r
epla
ced.
If
the
man
ifold
pre
ssur
e ra
nges
from
2.3
” to
2.8
” N
atur
al (
mod
el d
epen
dent
) an
d 6.
0” t
o 7.
5”Pr
opan
e (m
odel
dep
ende
nt),
the
heat
er i
s in
low
-fire
mod
e an
dth
e tro
uble
shoo
ting
step
s de
scrib
ed h
ere
shou
ld b
e fo
llow
ed.
NO
YES
*
See
page
4 f
or f
ault
flas
h co
de s
igna
ls.
* *
82
105
106
1
109
6766
44
122
68A
31B
200
204
208
55A
597
54
50
217
83
31B
212
76
223
11
205
222
201
33B
20C
19B
12
804
218
NO
PS
202
222A
221
828
803
840
841
825
70
82783
2
852
802
851
826
65I
26AEm
itter
Tub
e(s)
Com
bust
ion
Cham
ber
26B
26A
214
26E
26D
220
21B
21B
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
HL-2 Series
10
Parts Breakdown
11
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
HL-2 Series V.8/02 - 4” Tube Heater Installation, Operation, Maintenance and Parts Manual
Kit Contents & Product Features
12
Product Features
Kit contents for the HL-2 Series are shown below. Reference the proper column for your particular models length.
APPROVALS• IAS, CGA, AGA, CE, CSA.• Indoor approval.• Outdoor approval with OD-Kit.• Commercial approval.
BURNER SIGHT GLASS• For burner inspection.
COMBUSTION AIR INLET & VENT• 4” Male duct.
ENAMELED CONTROL BOX• Outside air collar (4”) attached.• Totally enclosed components.
CONTROLS• 100% safety shut off.• Differential pressure switch.• Silicon carbide hot surface igniter.• Flame rod sensing.• Pre and post purge controls.• Microprocessor circuit board provides soft lockout and self-diagnostic features.
EMITTER & COMBUSTION TUBES• 16ga. 4” O.D. aluminized steel.• All tubes coated with high temperature,
corrosion resistant black coating .95emissivity. Slip fit connection.
