Propane Gas Tanks And Piping; Circulating Air & Filters; Uctwork Ir Low - Goodman GMH95 Installation Instructions Manual

G P C
AS IPING HECKS
Before placing unit in operation, leak test the unit and gas connec-
tions.
T
O AVOID THE POSSIBILITY OF EXPLOSION OR FIRE
MATCH OR OPEN FLAME TO TEST FOR LEAKS
Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
testing methods.
NOTE: Never exceed specified pressures for testing. Higher
pressure may damage the gas valve and cause subsequent
overfiring, resulting in heat exchanger failure.
Disconnect this unit and shutoff valve from the gas supply piping
system before pressure testing the supply piping system with pres-
sures in excess of 1/2 psig (3.48 kPa).
Isolate this unit from the gas supply piping system by closing its
external manual gas shutoff valve before pressure testing supply
piping system with test pressures equal to or less than 1/2 psig
(3.48 kPa).
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, rec-
ommended 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.
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.
WARNING
,
NEVER USE A
.
P
IPING
WARNING
,
AN EXCAVATED
,
IT IS STRONGLY RECOMMENDED TO
.
,
ANY LEAKING AS CAN
.
,
MAKING THE GAS
.
® , Stalactic ® , Clyde's
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
Length, 3/8"
Feet
10 730
20 500
30 400
40 370
50 330
60 300
80 260
100 220
125 200
150 190
175 170
200 160
To convert to capacities at 15 psig settings - multiply by 1.130
To convert to capacities at 5 psig settings - multiply by 0.879
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" 1/2"
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
Conditioning Contractors of America" Manual D.
Install the duct system in accordance with Standards of the Na-
tional Board of Fire Underwriters for the Installation of Air Condi-
tioning, Warm Air Heating and Ventilating Systems. Pamphlets No.
® or John
90A and 90B.
31
5 to 15 PSIG
First Stage
(20 PSIG Max.)
Regulator
200 PSIG
Second Stage
Maximum
Regulator
Propane Gas Installation (Typ.)
Tubing Size, O.D. Type L
1/2" 5/8" 3/4"
1,700 3,200 5,300
1,100 2,200 3,700
920 2,000 2,900
850 1,700 2,700
770 1,500 2,400
700 1,300 2,200
610 1,200 1,900
540 1,000 1,700
490 900 1,400
430 830 1,300
400 780 1,200
380 730 1,100
Propane Gas Piping Chart I
Tubing Size, O.D. Type L
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
Continuous
11" W.C.
Nominal Pipe Size
Schedule 40
7/8" 1/2" 3/4"
8,300 3,200 7,500
5,800 2,200 4,200
4,700 1,800 4,000
4,100 1,600 3,700
3,700 1,500 3,400
3,300 1,300 3,100
2,900 1,200 2,600
2,600 1,000 2,300
2,300 900 2,100
2,100 830 1,900
1,900 770 1,700
1,800 720 1,500
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