Legacy Stoves SF1500 Setup guide

INSTALLATION AND OPERATOR’S MANUAL
READ THIS MANUAL BEFORE INSTALLING OR USING YOUR LEGACY STOVES BOILER
COAL HOT AIR FURNACES
Models: SF1500 • SF2500 • SF3500
IMPORTANT: IN ORDER TO ACHIEVE SAFE AND SATISFACTORY
RESULTS FROM YOUR LEGACY STOVES FURNACE, READ SAFETY
RULES AND INSTRUCTIONS CAREFULLY BEFORE INSTALLING AND
OPERATING. ALL INSTALLATIONS MUST BE IN ACCORDANCE WITH
STATE AND LOCAL CODES. INSTALLATION IS TO BE PERFORMED BY A
QUALIFIED INSTALLER. SAVE THESE INSTRUCTIONS FOR FUTURE
REFERENCE.
Your Leg cy Stoves hot ir furn ce is c p ble of gener ting very
hot temper tures. Temper tures nd fl mes in the ignition box
re re c p ble of igniting fl mm ble v pors if dr wn into the
furn ce. Fl mm ble or explosive products must never be stored
in the s me room or in the vicinity of furn ce. Please read
this e tire ma ual before you i stall or use your ew
fur ace. Retai these i structio s for future refere ce.
Failure to follow these i structio s may result i property
damage, bodily i jury, or eve death.
Legacy Stoves, A DIVISION OF:
ALTERNATE HEATING SYSTEMS
2395 LITTLE EGYPT RD
HARRISONVILLE, PA 17228
717-987-0099
www.leg cystoves.com
EMAIL: support@leg cystoves.com
Record Model a d Serial Number Below:
Model:
Serial Number:
Date of Purchase:

- 2 -

Copyri ht 2000 – 2023 Alternate Heatin Systems
No portion of this publication may be reproduced without the
express written consent of Alternate Heatin Systems.
Printed: 04/28/23

Table of Contents
Introduction..............................................................................................................................................................1
Safety Considerations..............................................................................................................................................1
Additional Warnings and Notices............................................................................................................................2
Carbon Monoxide (CO Awareness...........................................................................................................2
Chimneys and Venting.............................................................................................................................................2
Venting Guidelines...................................................................................................................................................3
Types Of Chimneys..................................................................................................................................3
Draft...........................................................................................................................................................4
Technical Aspects of Chimney Performance.............................................................................................5
Barometric Damper...................................................................................................................................5
Combustion Air (Make Up Air .................................................................................................................6
Masonry Chimneys....................................................................................................................................6
Prefabricated Chimneys.............................................................................................................................6
Common Chimney Problems...................................................................................................................................7
Insufficient Draft – Common Issues..........................................................................................................7
What to Do if You Have a Problem.........................................................................................................................8
If you have a chimney fire:........................................................................................................................8
In Case of a Runaway Fire.........................................................................................................................8
Smoke puffs out of the furnace:.................................................................................................................8
Chimney Specifics...................................................................................................................................................9
Stovepipe................................................................................................................................................................10
Wall Pass-Through: United States...........................................................................................................11
Wall Pass-Through: Canada.....................................................................................................................11
Installation..............................................................................................................................................................12
Furnace Location...................................................................................................................................................12
Clearances................................................................................................................................................13
Rigging and Positioning..........................................................................................................................13
Assembly and Wiring.............................................................................................................................................14
Installing the Fan/Limit Switch...............................................................................................................14
Installing the ADC Damper.....................................................................................................................14
Installing the Thermostat.........................................................................................................................15
Shaker Handle/Draft Knobs.....................................................................................................................15
Mounting the Blower, Blower Bracket and Filter box............................................................................16
SF1500/SF2500/SF3500 Wiring Diagram.............................................................................................................18
Duct Work..............................................................................................................................................................19
Installing as a Central Furnace................................................................................................................19
Installing as a Supplemental Furnace......................................................................................................19
Operating Instructions............................................................................................................................................22
Controls..................................................................................................................................................................22
Thermostat...............................................................................................................................................22
Adjusting Automatic Draft Control.........................................................................................................22
Adjusting the fan control.........................................................................................................................23
Fuels (USA ...........................................................................................................................................................23
Coal..........................................................................................................................................................23
Wood (Used for Coal Fire Startup ..........................................................................................................23
Fuels (Canada .......................................................................................................................................................23
Coal..........................................................................................................................................................23
Start-up...................................................................................................................................................................24
Curing Paint.............................................................................................................................................24

Wood vs Coal...........................................................................................................................................24
Fuel Capacity...........................................................................................................................................24
Starting a Wood Fire................................................................................................................................24
Starting A Coal Fire.................................................................................................................................25
Loading Additional Coal..........................................................................................................................25
Maintaining a Coal Fire...........................................................................................................................25
Shaking....................................................................................................................................................26
Ashes........................................................................................................................................................26
Draft Control Settings..............................................................................................................................26
Grates.......................................................................................................................................................26
Other General Operating Guidelines.....................................................................................................................27
Operation During a Power Failure...........................................................................................................27
Maintenance...........................................................................................................................................................28
Spiral Chamber........................................................................................................................................28
Automatic Draft Control..........................................................................................................................28
Firebricks.................................................................................................................................................28
Distribution Blower.................................................................................................................................28
Filter Replacement...................................................................................................................................28
Doors........................................................................................................................................................28
Creosote...................................................................................................................................................29
Specifications.........................................................................................................................................................30
Special Instructions................................................................................................................................................31
Coil installation...................................................................................................................................31
Special Instructions................................................................................................................................................32
Coil Installation...................................................................................................................................32
.............................................................................................................................................................32
Service Parts: SF1500..............................................................................................................................33
Service Parts: SF1500 (continued ..........................................................................................................34
Service Parts: SF2500..............................................................................................................................35
Service Parts: SF2500 (continued ..........................................................................................................36
Service Parts: SF3500..............................................................................................................................37
Service Parts: SF3500 (continued ..........................................................................................................38
Warranty Information (2 Pages ..............................................................................................................39
Service and Maintenance Log................................................................................................................................41
Service and Maintenance Log................................................................................................................................42

I troductio

 !"
#$
%
&
Safety Co sideratio s
!

'!!
!

CAUTION! ALWAYS WEAR FIRE-
RESISTANT GLOVES TO OPERATE THE
FURNACE. THE AIR CONTROL IS HOT
WHILE IN OPERATION.
!"!
!
(
'
)!'!)'
*'!
+!
'#*'!!
'!
!$
'
)!"
!,
(
CAUTION: ALL SURFACES OF FURNACE
ARE HOT. DO NOT TOUCH. KEEP
CHILDREN AWAY. SERIOUS BURNS WILL
RESULT IF TOUCHED. THIS IS A HEAT
PRODUCING APPLIANCE.

DANGER! RISK OF FIRE OR EXPLOSION!
DO NOT USE CHEMICALS OR FLU IDS TO
START OR “FRESHEN UP” A FIRE. SEVERE
BODY BURNS OR A FIRE IN YOUR HOME
COULD RESULT. DO NOT BURN GARBAGE,
GASOLINE, THINNERS, DRAIN OR ENGINE
OIL, KEROSENE, OR FUEL OIL, ETC. AN
EXPLOSION, A HOUSE FIRE OR PERSONAL
INJURY COULD RESULT. KEEP ALL SUCH
LIQUIDS WELL AWAY FROM THE FURNACE
WHILE IN USE.
- 1 -

Additio al War i gs a d Notices
Carbon Monoxide (CO) Awareness
-!'-.!
-.'!
-.!!/
0!!-.
-.)!
!
-.-.-.
'#1
2 #!
3 
4 -
5 -
6 7'!8
Chim eys a d Ve ti g
- 2 -
PER EPA GUIDELINES, YOU CAN NOT BURN
WOOD IN THIS UNIT EXCEPT FOR THE
PURPOSE OF STARTING A COAL FIRE.
CAUTION! NEVER USE GASOLINE,
GASOLINE-TYPE LANTERN FUEL, KEROSENE,
CHARCOAL LIGHTER FLUID, OR SIMILAR
LIQUIDS TO START OR “FRESHEN UP” A FIRE IN
THIS HEATER. KEEP ALL SUCH LIQUIDS WELL
AWAY FROM THE HEATER WHILE IT IS IN USE.
DO NOT LEAVE SMALL CHILDREN
UNATTENDED WHILE IN THE ROOM WITH THIS
HEATER.
WARNING: DO NOT INSTALL A FLUE DAMPER
IN THE EXHAUST VENTING SYSTEM OF THIS
APPLIANCE. DO NOT CONNECT THIS UNIT TO A
CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
NEVER SLEEP IN THE SAME ROOM WITH ANY
COAL BURNING FURNACE! DO NOT INSTALL IN
A SLEEPING ROOM.
DO NOT OVERFIRE – IF HEATER OR
CHIMNEY CONNECTOR GLOWS, YOU ARE
OVERFIRING.
THIS APPLIANCE IS ALSO APPROVED FOR
INSTALLATION INTO A SHOP.
REFER TO MARKINGS ON THE APPLIANCE FOR
ADDITIONAL INFORMATION.
CAUTION! FAILURE TO FOLLOW THE
INSTALLATION INSTRUCTIONS IN THIS MANUAL,
OR USING MAKESHIFT COMPROMISES DURING
INSTALLATION MAY RESULT IN PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH!
THIS HEATER IS NOT AN INCINERATOR. DO
NOT BURN GARBAGE OR FLAMMABLE LIQUIDS
SUCH AS GASOLINE, NAPHTHA, OR ENGINE
OIL!
HOT WHILE IN OPERATION. KEEP CHILDREN,
CLOTHING AND FURNITURE AWAY. CONTACT
MAY CAUSE SKIN BURNS.
WHEN INSTALLING IN A TIGHTLY
CONSTRUCTED HOME, A SOURCE OF FRESH
AIR TO THE ROOM MAY BE NECESSARY FOR
PROPER OPERATION OF THIS APPLIANCE.
ALWAYS WEAR GLOVES WHEN ATTENDING
TO THIS HEATER
INSTALLATION IS TO BE PERFORMED BY A
QUALIFIED INSTALLER. INSTALLATION WILL
COMPLY WITH ALL THE REQUIREMENTS OF THE
AUTHORITY HAVING JURISDICTION OVER THE
INSTALLATION.

Ve ti g Guideli es
9!
*!
:-;<#!
=<>=<?#
!@
!!
(/A@<
'/A2<
(
-!2@(
*
!2A(
!4(
'!;
!!*
'(;?
285
!!;
&!

MAINTAIN CHIMNEY AND CHIMNEY
CONNECTORS, KEEP CLEAN AND IN
GOOD CONDITION!
Types Of Chim eys


!B
*

-
"
*
!!

-;,8-;/+4@6#-/%/
+;0$
'!
($
!
%,% ;3223A241
/
!*
-
!!
/*C3=4
3>4D=5=3E
-'
'!
!/
*C3=43>3D6@63E
:;<1
2E !
#!

3E #
)!
4E /:;<
)!
#!
!$)#
)!




2@
!3AF
!
!
#'
!'

- 3 -

The three foot, two foot, te foot rule
THE FURNACE MUST BE
CONNECTED TO ITS OWN CHIMNEY.
FOR A TILE-LINED FLUE, A MINIMUM
FLUE SIZE OF 8” X 8” IS NECESSARY FOR
PROPER OPERATION.
MANUAL DAMPERS OR “HEAT
SAVERS” MUST NEVER BE INSTALLED IN
THE FLUE PIPE. IMPROPER OPERATION
COULD RESULT IN DEATH.
CAUTION: THE CHIMNEY MUST BE A
CLASS “A” CHIMNEY, IN GOOD
OPERATING AND CLEAN CONDITION.
NOTE: THE USE OF ALUMINUM TYPE
“B” GAS VENT FOR SOLID FUELS IS
UNSAFE AND PROHIBITED BY THE
NATIONAL FIRE PROTECTION AGENCY
CODE.
Draft
#
!!
(
$(/A@C-E
!(#
(
;!
!&
'(
B(!G!
!"-


G
(;(!"
%(!
#HH
';

!
';
!C!36AI%E
(;J'
G!
*!
(!
!"
Poor chim eys with cold walls ca
cause creosote buildup. Sharp
be ds a d horizo tal flues should
also be avoided. The exhaust must
be kept movi g through the
pipi g/flue to preve t creosote or fly
ash buildup. If a horizo tal sectio
must be used, it must rise slightly to
preve t dead air space.
!HC3A
E'
!
(%$
K
4/3/2A!
!/

)"
IMPORTANT: (
!H
+
(!
2=<*
B
- 4 -

!)

IMPORTANT: !35

*
)!
#!
B

)#
/
NOTE: ;?
285
LMAN!
#!
'(

Tech ical Aspects of Chim ey Performa ce
;!
;

$;
!)$

$!#
//
(
'CE

/A@!%!
'(/2AL
!!$
Dwyer Ma ometer
(
"(%
(!!C
E!!
&
(
/2A#
!$(
!-
- !
Barometric Damper
;!
!
;!
((
0'()
!'
#H
;
!)
'(/2A
!!
#!
!
?
#(
("
-!
C
E(
'#
(
/A@/2A

- 5 -
CAUTION! It is important to maintain
-.06 to -.10 inches of water column.

Barometric Damper
Combustio Air (Make Up Air)
*
'
')
;$!

H
!/!

-!!
;!
.!!1
2 //)
'/!
!/(
!
3 ;!!

4 $/
!/)"8
'
5 '

6 ;
Maso ry Chim eys
#'

;
!!

!$!!

!
/!

%

!!!
!
!)
C;!
$
O!
E#-!
)
#
!
!/

Prefabricated Chim eys
!
!!

'L
$B
($;!
!L
-/L2A4
L-/@3M
- 6 -
The airflow through the system a d
out the chim ey mea s that oxyge
is leavi g the home a d will create
a oxyge deficit if this air is ot
replaced.

9
!$
#$;
C;E
;-;
C+E$%2PA%3PA
+C-E!
;
KCBE$

;+"
-C0!E
;%-C%E
;!CQE
$!
*!-
-C7E!
$
;F+C#E$
'
!

!:<&!R+
CRE$
&;- ;CKE
$;-CE


$*!;-
CE;&!%C,E
!
;C.E
)
&
Commo Chim ey Problems
I sufficie t Draft – Commo Issues
;-S;
)"/*&8


+-/
O2@!'

-+-/7
!

B..+/
#
(!!
&!

,.01
!
(
- 7 -

0-?S!
*'

$(
%-.GS.G!
G!
!
Q0!S!
MAN!$
*
7%S,
*
(
?*#
!
*236T
*;'=<*
6A$#!36T!
@4$'M<*
#
!!

(*
REMEMBER:;!


THE MOST IMPORTANT THING TO
REMEMBER ABOUT CHIMNEYS IS
THEIR NEED FOR MAINTENANCE AND
CLEANING. IF A CHIMNEY IS NOT
CLEANED ON A FREQUENT BASIS, IT
WILL AFFECT THE DRAFT AS WELL AS
POSSIBLY CONTRIBUTE TO A
CHIMNEY FIRE.
What to Do if You Have a Problem
If you have a chim ey fire:
2+
3-)
4-(
!

5
B
*
*
6B)
*
@7
!)
I Case of a Ru away Fire
2!
((B
"!!C
4E
3+(G8
!C0'(
)E
4
!
$

Smoke puffs out of the fur ace:
2-H
(
3-(
4-!#
- 8 -

5;9
!'
")
6F!(
!
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@-)!'
!
P-/

Chim ey Specifics
;E %!
!@
CP%36AA
%46AAE35
+E -&!
4
23858=
F!

K/!
!
!

-E --/;
23
$68=!
!!#
!L!
#

!

BE %--/
#

)!!

'
?
1
U-*
$;-426$
U
L2PPP
U%/!


U.
(
*
2=AAI%CM=3I-E
#!
(#$
!
!
!!B
*C
-% E
)'
"
#)!
!!
/
- 9 -
WARNING - DO NOT CONNECT THIS
UNIT TO A CHIMNEY SERVING ANOTHER
APPLIANCE!



)!!%'

!!C!
EO)$
!
Stovepipe
#*
!;?

285L
!!!

"!
*
/!
!

#
!!!
!
!
?!@P
!7!

!;


Note: Do ot decrease the diameter of chim ey
pipe to less tha that of the flue collar! Chim ey
co ector a d flue must be 6 i ches i diameter
or greater for the SF1500, 7 i ches or greater for
the SF2500/3500 models.
I spect stove pipe at least twice
mo thly for creosote buildup.
Creosote creates a risk of chim ey
fire, a d ca obstruct stove pipe. A
obstructed stove pipe ca result i
CO buildup i your boiler room.
)
)!
!
!!
)
)!

#
!9
0 ;)
!
) !#
!)
(!

?!

%.
Stove pipe passi g through wall
- 10 -
Note: Legacy Stoves hot air fur aces are ot
EPA approved for co ti uous firi g with wood.
O ly use wood for preparatio for a coal fire.

Ma ual Dampers must ot be
i stalled i the flue pipe. Improper
operatio could result i death.
L35
2=
#!
2=
!'
L!
!
!L
/!!
$

$
!=
Wall Pass-Through: U ited States
#L,% ;322
!
!!
,% ;C,% 
;E
!!;

23VC4AAE
)!
46VCMAE;)/
48=VCME
!C!
!E#!

%
,% ;
322
U.S. Wall Pass-Through
Wall Pass-Through: Ca ada
!-
;
$2=V
C56AE!
#!
!
-;,8-;+4@6

Ca adia Wall Pass-Through
- 11 -

I stallatio
Fur ace Locatio
9%26AA8%36AA8%46AA
!
#

!
IF FANS ARE INSTALLED IN THE STORAGE
AREA THEY SHOULD NOT CREATE
NEGATIVE PRESSURES IN THE ROOM
WHERE THE SOLID FUEL-BURNING
APPLIANCE IS LOCATED.
!!
!
*!*!!
J
",0W0F
*#!!
!!*
'23
!!
4@%
'3!*
*

Floor Protectio Diagram
!
!$)
!


)(G,!
!(


!
,=!
MAN!;?
285
;!35
F/!
!"



Cautio ! Do ot i stall i a sleepi g
room. DO NOT co ect this u it to a
chim ey servi g a other applia ce.
I stall a CO mo itor i the room
where the fur ace is located, at
about table height.
- 12 -
A fire could be started if the fur ace
is i stalled too close to walls,
fur iture, carpet or draperies.

Cleara ces
Listed Cleara ces
Front 48 Inches
Sides 24 Inches
Re r 30 Inches
Top 24 Inches
From Plenum Top 2 Inches
Cleara ce Diagram
!
$F
1
✔%!

✔
!
!/
!
✔

✔;!

✔!)
-$
Ve tilatio Fa s i the fur ace room
must ot create egaive pressure.
Doi g so will create a u safe
co ditio a d egatively impact
fur ace performa ce.
Riggi g a d Positio i g
B"G/

(
.*!
!!!
&!
!/
!!H
$
"!!

!
!(
!
- 13 -

Assembly a d Wiri g
REFER TO SCHEMATIC p .17
.nce the furnace and the plenum have been
installed within the proper clearances listed in this
manual and in accordance local and state codes, you
may attach the wiring, If not already done so from the
factory. We recommend the installation of the wiring
be done by a professional licensed electrician. BE
EXTREMELY CAREFUL NOT TO DAMAGE
WIRING DURING INSTALLATION.
Using the three self tapers, screw the 4×4 control
box to the right side, 1 ½” from the top of the furnace
and 3” from the front of the furnace. If you damage
or nick a wire during the installation call your dealer
and replace any damaged wire. DO NOT USE
DAMAGED WIRES. USE ONLY 105ºC RATED
WIRE.
Installing the Fan/Limit Switch
Drill a 7/8” hole in the center of the plenum
approximately 12”-18” above the top of the furnace.
Insert the fan/limit switch here and screw it fast to the
plenum.
I stalli g the ADC Damper
Install the ADC (Automatic Draft Control damper
to the ash door using the 1/2” bolt and nut, hold the
unit straight while tightening, use a 3/4” wrench.
Secure the conduit, using two conduit straps, to
the side of the furnace. Check the door of the
automatic draft Control to assure proper operation.
- 14 -
Caution! BE EXTREMELY CAREFUL
NOT TO DAMAGE WIRING
It is your respo sibility to follow all local a d
state codes for wiri g a d i stallatio .
Warning!! Do Not use Damaged
Wires

I stalli g the Thermostat

F:F<
:Q<&!'
33
!%
 /
/
Shaker Ha dle/Draft K obs
+!
(!/

+(
 (
'283<
%2
Supply Power
,23A!
&!';"


NOTE!;,00FQ0,-9B#-.,,0-L+0
F.W#B0B+9-.L0FX
- 15 -
DO NOT TURN ON TH BR AK R UNTIL ALL WIRING IS COMPL T AND
TH R LAY IS S CUR D