Propane Gas Tanks And Piping; Circulating Air & Filters; Ductwork - Air Flow - Goodman MH95 Installation Instructions Manual

P G T
ROPANE AS ANKS AND
I
F THE GAS FURNACE IS INSTALLED IN A BASEMENT
AREA OR A CONFINED SPACE
CONTACT A PROPANE SUPPLIER TO INSTALL A GAS DETECTING
WARNING DEVICE IN CASE OF A GAS LEAK
• S
INCE PROPANE GAS IS HEAVIER THAN AIR
SETTLE IN ANY LOW AREAS OR CONFINED SPACES
• P
ROPANE GAS ODORANT MAY FADE
U
NDETECTABLE EXCEPT FOR WITH A WARNING DEVICE
A gas detecting warning system is the only reliable way to detect a
propane gas leak. Rust can reduce the level of odorant in propane
gas. Do not rely on your sense of smell. Contact a local propane
gas supplier about installing a gas detecting warning system. If
the presence of gas is suspected, follow the instructions on Page
4 of this manual.
All propane gas equipment must conform to the safety standards
of the National Board of Fire Underwriters, NBFU Manual 58.
For satisfactory operation, propane gas pressure must be 11 inch
w.c. at the furnace manifold with all gas appliances in operation.
Maintaining proper gas pressure depends on three main factors:
1. Vaporization rate, depending on temperature of the liquid,
and "wetted surface" area of the container or containers.
2. Proper pressure regulation. (Two-stage regulation is
recommended for both cost and efficiency).
3. Pressure drop in lines between regulators, and between
second stage regulator and the appliance. Pipe size will
depend on length of pipe run and total load of all appliances.
Complete information regarding tank sizing for vaporization, recom-
mended regulator settings, and pipe sizing is available from most regu-
lator 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.
Shellac-based compounds resistant to the actions of liquefied
petroleum gases such as Gasolac
Crane ® are 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" 5/8"
Feet
10 730 1,700 3,200
20 500 1,100 2,200
30 400 920 2,000
40 370 850 1,700
50 330 770 1,500
60 300 700 1,300
80 260 610 1,200
100 220 540 1,000
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
P
IPING
WARNING
,
AN EXCAVATED
,
IT IS STRONGLY RECOMMENDED TO
.
,
ANY LEAKING AS CAN
.
,
MAKING THE GAS
® ®
, Stalactic , Clyde's
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
Nominal Pipe Size
Schedule 40
3/4" 7/8" 1/2"
5,300 8,300 3,200
3,700 5,800 2,200
2,900 4,700 1,800
2,700 4,100 1,600
2,400 3,700 1,500
2,200 3,300 1,300
1,900 2,900 1,200
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
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
Length, 3/8"
Feet
10 39
20 26
30 21
40 19
50 18
60 16
80 13
100 11
125 10
.
150 9
200 8
250 8
*Data in accordance with NFPA pamphlet NO. 54
D - A
UCTWORK
N
EVER ALLOW THE PRODUCTS OF COMBUSTION
M ,
ONOXIDE TO ENTER THE RETURN DUCT WORK OR CIRCULATION
A .
IR SUPPLY
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 Con-
ditioning 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.
A closed return duct system must be used, with the return duct con-
nected to the furnace. NOTE: Ductwork must never be attached to
®
or John
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 us a room, closet, or alcove as a return air
chamber.
When the furnace is used in connection with a cooling unit, the fur-
nace should be installed in parallel with or on the upstream side of the
cooling unit to avoid condensation in the heating element. With a par-
allel 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.
When the furnace is installed without a cooling coil, it is recommended
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
3/4"
of such a size that the heat exchanger can be viewed for visual light
inspection or such that a sampling probe can be inserted into the air-
7,500
stream. The access panel must be made to prevent air leaks when
4,200
4,000
the furnace is in operation.
3,700
3,400 When the furnace is heating, the temperature of the return air entering
3,100
the furnace must be between 55°F and 100°F.
2,600
2,300
2,100
1,900
1,700
1,500
31
Tubing Size, O.D. Type L
1/2" 5/8" 3/4" 7/8" 1-1/8" 1/2"
92 199 329 501 935 275
62 131 216 346 630 189
50 107 181 277 500 152
41 90 145 233 427 129
37 79 131 198 376 114
35 72 121 187 340 103
29 62 104 155 289 89
26 55 90 138 255 78
24 48 81 122 224 69
21 43 72 109 202 63
19 39 66 100 187 54
17 36 60 93 172 48
Propane Gas Piping Chart II
XIII. CIRCULATING AIR & FILTERS
F
IR LOW
WARNING
Nominal Pipe Size
Schedule 40
3/4" 1" 1-1/4" 1-1/2"
567 1,071 2,205 3,307
393 732 1,496 2,299
315 590 1,212 1,858
267 504 1,039 1,559
237 448 913 1,417
217 409 834 1,275
185 346 724 1,066
162 307 630 976
146 275 567 866
132 252 511 787
112 209 439 665
100 185 390 590
,
INCLUDING CARBON