Circulating Air & Filters; Ductwork - Air Flow; Filters - Read This Section Before Installing The Return Air Ductwork; Ottom Eturn Ir Pening Pflow Odels ] - Goodman GKS9 Installation Instructions Manual

Complete information regarding tank sizing for vaporization, recom-
mended regulator settings, and pipe sizing is available from most
regulator manufacturers and propane gas suppliers.
Since propane gas will quickly dissolve white lead and most stan-
dard commercial compounds, special pipe dope must be used. Shel-
lac-based compounds resistant to the actions of liquefied petroleum
®
gases such as Gasolac , Stalactic
satisfactory.
Refer to the following illustration for typical propane gas installa-
tions.
First Stage
Regulator
200 PSIG
Maximum
Propane Gas Installation (Typ.)
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 Tubing Size, O.D. Type L
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
To convert to capacities at 15 psig settings - multiply by 1.130
To convert to capacities at 5 psig settings - multiply by 0.879
Propane Gas Piping Chart I
Sizing Between Single or Second Stage Regulator and Appliance*
Maximum Propane Capacities Listed are Based on 1/2" W.C. pressure drop at 11" W.C. setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing Tubing Size, O.D. Type L
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
*Data in accordance with NFPA pamphlet NO. 54
Propane Gas Piping Chart II
XIII. CIRCUL XIII. CIR XIII. CIR CULA A A A A TIN CUL CUL
XIII. CIR XIII. CIR CUL
D - A F
UCTWORK IR LOW
Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Design the
ductwork in accordance with the recommended methods of "Air
Conditioning Contractors of America" Manual D.
Install the duct system 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.
® ®
, Clyde's or John Crane
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
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
TIN TIN TING AIR & FIL G AIR & FILTER G AIR & FIL G AIR & FIL TER TER TERS S S S S
TIN G AIR & FIL TER
A closed return duct system must be used, with the return duct con-
nected to the furnace. NOTE: Ductwork must never be attached to
the back of the furnace. Flexible joints may be used for supply and
return connections to reduce noise transmission. To prevent the
blower from interfering 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. Never use a room, closet, or alcove as a
®
are
return air chamber.
B R
OTTOM ETURN
The bottom return air opening on upflow models utilizes a "lance
and cut" method to remove sheet metal from the duct opening in the
base pan. To remove, simply press out the lanced sections by hand
to expose the metal strips retaining the sheet metal over the duct
opening. Using tin snips, cut the metal strips and remove the sheet
metal to free the duct flanges. Using the scribe line along the duct
flange as a guide, unfold the duct flanges around the perimeter of
the opening using a pair of seamer pliers or seamer tongs. NOTE:
Airflow area will be reduced by approximately 18% if duct flanges
are not unfolded. This could cause performance issues and noise
issues.
E
DGES OF SHEET METAL MAY BE SHARP.
3/4"
WHEN REMOVING SHEET METAL FROM THE DUCT OPENING.
7,500
4,200
4,000
CUT USING TIN SNIPS
3,700
3,400
3,100
2,600
2,300
2,100
1,900
1,700
1,500
CUT FOUR CORNERS
AFTER REMOVING SHEET
METAL
1-1/4" 1-1/2"
2,205 3,307 When the furnace is used in connection with a cooling unit, the fur-
1,496 2,299
nace should be installed in parallel with or on the upstream side of
1,212 1,858
1,039 1,559 the cooling unit to avoid condensation in the heating element. With
913 1,417
a parallel flow arrangement, the dampers or other means used to
834 1,275
724 1,066
control the flow of air must be adequate to prevent chilled air from
630 976
entering the furnace and, if manually operated, must be equipped
567 866
511 787
with means to prevent operation of either unit unless the damper is
439 665
in the full heat or cool position.
390 590
When the furnace is installed without a cooling coil, it is recom-
mended that a removable access panel be provided in the outlet air
duct. This opening shall be accessible when the furnace is installed
and shall be of such a size that the heat exchanger can be viewed
for visual light inspection or such that a sampling probe can be in-
serted into the airstream. The access panel must be made to pre-
vent air leaks when the furnace is in operation.
When the furnace is heating, the temperature of the return air enter-
ing the furnace must be between 55°F and 100°F.
F - R
ILTERS EAD
R A
ETURN IR
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
24
A O [U
IR PENING PFLOW
WARNING
U
SE GLOVES AS A PRECAUTION
Duct Flange Cut Outs
T S B
HIS ECTION EFORE
D
UCTWORK
M ]
ODELS
PRESS OUT BY HAND
SCRIBE LINES OUTLINING
DUCT FLANGES
I T
NSTALLING HE