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P P P P P
G G G G G
P P P P P
C C C C C
ROPANE
ROPANE
ROPANE
ROPANE
ROPANE
AS
AS
AS
AS
AS
IPING
IPING
IPING
IPING
IPING
HARTS
HARTS
HARTS
HARTS
HARTS
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing Size, O.D. Type L
Tubing
Length,
3/8"
1/2"
Feet
10
730
1,700
20
500
1,100
30
400
920
40
370
850
50
330
770
60
300
700
80
260
610
100
220
540
125
200
490
150
190
430
175
170
400
200
160
380
Sizing Between Second Stage and Appliance Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing Size, O.D. Type L
Tubing
Length,
3/8"
1/2"
5/8"
3/4"
Feet
10
39
92
199
329
20
26
62
131
216
30
21
50
107
181
40
19
41
90
145
50
18
37
79
131
60
16
35
72
121
80
13
29
62
104
100
11
26
55
90
125
10
24
48
81
150
9
21
43
72
200
8
19
39
66
250
8
17
36
60
C C C C C
A A A A A
I R I R I R I R I RC U L
C U LA A A A A TING
C U L
C U L
C U L
TING
TING
TING
TING
I R I R I R I R I R A N D
A N D
A N D
A N D
A N D
N
EVER
ALLOW
THE
PRODUCTS
,
MONOXIDE
TO
ENTER
THE
RETURN
.
SUPPLY
Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Ductwork
should be designed in accordance with the recommended meth-
ods of "Air Conditioning Contractors of America" Manual D.
A duct system must be installed in accordance with Standards of
the National Board of Fire Underwriters for the Installation of Air
Conditioning, Warm Air Heating and Ventilating Systems. Pamphlets
No. 90A and 90B.
A closed return duct system must be used, with the return duct
connected to the furnace. NOTE:
tached to the back of the furnace. For installations requiring more
than 1800 CFM, use a bottom return or two sided return. Supply and
return connections to the furnace may be made with flexible joints
to reduce noise transmission. To prevent the blower from inter-
fering with combustion air or draft when a central return is used, a
connecting duct must be installed between the unit and the utility
room wall. A room, closet, or alcove must not be used as a return air
chamber.
When the furnace is used in connection with a cooling unit, the
furnace should be installed in parallel with or on the upstream side
of the cooling unit to avoid condensation in the heating element.
Nominal Pipe Size
Schedule 40
5/8"
3/4"
7/8"
1/2"
3,200
5,300
8,300
3,200
2,200
3,700
5,800
2,200
2,000
2,900
4,700
1,800
1,700
2,700
4,100
1,600
1,500
2,400
3,700
1,500
1,300
2,200
3,300
1,300
1,200
1,900
2,900
1,200
1,000
1,700
2,600
1,000
900
1,400
2,300
900
830
1,300
2,100
830
780
1,200
1,900
770
730
1,100
1,800
720
Nominal Pipe Size
Schedule 40
7/8"
1-1/8"
1/2"
3/4"
1"
501
935
275
567
1,071
346
630
189
393
732
277
500
152
315
590
233
427
129
267
504
198
376
114
237
448
187
340
103
217
409
155
289
89
185
346
138
255
78
162
307
122
224
69
146
275
109
202
63
132
252
100
187
54
112
209
93
172
48
100
185
F F F F F
I L I L I L I L I LTERS
TERS
TERS
TERS
TERS
WARNING
,
OF
COMBUSTION
INCLUDING
DUCT
WORK
OR
CIRCULATION
NOTE:
NOTE:
NOTE: Ductwork must never be at-
NOTE:
With a parallel flow arrangement, the dampers or other means used
to control the flow of air must be adequate to prevent chilled air
from entering the furnace and, if manually operated, must be
equipped with means to prevent operation of either unit unless the
damper is in the full heat or cool position.
3/4"
When the furnace is installed without a cooling coil, it is recom-
7,500
mended that a removable access panel be provided in the outlet air
4,200
4,000
duct. This opening shall be accessible when the furnace is installed
3,700
and shall be of such a size that the heat exchanger can be viewed
3,400
310
for visual light inspection or such that a sampling probe can be
2,600
inserted into the airstream. The access panel must be made to pre-
2,300
2,100
vent air leaks when the furnace is in operation.
1,900
1,700
When the furnace is heating, the temperature of the return air
1,500
entering the furnace must be between 55°F and 100°F.
When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
the return air shall also be handled by a duct sealed to the furnace
1-1/4" 1-1/2"
casing and terminating outside the space containing the furnace.
2,205
3,307
1,496
2,299
1,212
1,858
F F F F F
- R
- R
- R
- R
- R
ILTERS
ILTERS
ILTERS
EAD
EAD
EAD
ILTERS
ILTERS
EAD
EAD
1,039
1,559
A A A A A
D D D D D
91
1,417
IR IR IR IR IR
UCTWORK
UCTWORK
UCTWORK
UCTWORK
UCTWORK
834
1,275
724
1,066
Filters must be used with this furnace. Discuss filter maintenance
630
976
567
866
with the building owner. Filters do not ship with this furnace, but
511
787
439
665
must be provided by the installer. Filters must comply with UL900
390
590
or CAN/ULCS111 standards. If the furnace is installed without filters,
the warranty will be voided.
NO
NO
TE:
TE:
NOTE:
NO
NO
TE: An undersized opening will cause reduced airflow. The
TE:
bottom return is set up as a knock out.
CARBON
U U U U U
I I I I I
PRIGHT
PRIGHT
PRIGHT
PRIGHT
PRIGHT
NSTALLATIONS
NSTALLATIONS
NSTALLATIONS
NSTALLATIONS
NSTALLATIONS
AIR
Depending on the installation and/or customer preference, differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register or a side panel external filter rack kit
(upflows), or the ductwork above a downflow furnace. As an alter-
native, a media air filter or electronic air cleaner can be used as the
primary filter.
C C C C C
IRCULATION
IRCULATION
IRCULATION
IRCULATION
IRCULATION
One of the most common causes of a problem in a forced air heat-
ing system is a blocked or dirty filter. Circulating air filters must be
inspected monthly for dirt accumulation and replaced if necessary.
Failure to maintain clean filters can cause premature heat exchanger
failure.
A new home may require more frequent replacement until all con-
struction dust and dirt is removed. Circulating air filters are to be
installed in the return air duct external to the furnace cabinet.
M INIM UM FILTER SIZES for DISPOSABLE FILTERS
FURNACE INPUT
D ISP OSA B LE N OM IN A L 300 F .M . F A C E VELOC IT Y
21
C C C C C
A A A A A
I R
I RC U L
I R
I R
I R
C U LA A A A A T I N G
C U L
C U L
C U L
T I N G
T I N G
T I N G
T I N G
T T T T T
S S S S S
B B B B B
I I I I I
HIS
HIS
HIS
ECTION
ECTION
ECTION
EFORE
EFORE
EFORE
NSTALLING
NSTALLING
NSTALLING
HIS
HIS
ECTION
ECTION
EFORE
EFORE
NSTALLING
NSTALLING
A A A A A
F F F F F
IR IR IR IR IR
ILTERS
ILTERS
ILTERS
ILTERS
ILTERS
70M
90M
115M
F F F F F
I R
I R
I R A N D
I R
I R
A N D
A N D
A N D
A N D
I L I L
I L I LT E R S
I L
T E R S
T E R S
T E R S
T E R S
T T T T T
R R R R R
HE
HE
HE
ETURN
ETURN
ETURN
HE
HE
ETURN
ETURN
FILTER SIZE
2
768 in
2
960 in
2
1022 in
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