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T
O AVOID THE POSSIBILITY OF EXPLOSION OR FIRE, NEVER USE A 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
P
ROPANE GAS IS HEAVIER THAN AIR AND ANY LEAKING GAS CAN SETTLE IN
ANY LOW AREAS OR CONFINED SPACES.
PERSONAL INJURY, OR DEATH DUE TO FIRE OR EXPLOSION CAUSED BY A
PROPANE GAS LEAK, INSTALL A GAS DETECTION 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 5 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
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.
WARNING
P
IPING
WARNING
T
O PREVENT PROPERTY DAMAGE,
®
®
, Clyde's
or John Crane
First Stage
Regulator
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"
Feet
10
39
92
20
26
62
30
21
50
40
19
41
50
18
37
60
16
35
80
13
29
100
11
26
125
10
24
150
9
21
200
8
19
250
8
17
*Data in accordance with NFPA pamphlet NO. 54
Propane Gas Piping Chart II
XIII. CIRCUL
XIII. CIR
XIII. CIR
XIII. CIR
XIII. CIR
D
- A
F
UCTWORK
IR
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 methods
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 Condi-
®
are
tioning, 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
the back of the furnace. Supply and return connections to the fur-
nace may be made with flexible joints 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. 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 fur-
nace should be installed in parallel with or on the upstream side of
25
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
200 PSIG
Second Stage
Maximum
Regulator
5/8"
3/4"
7/8"
3,200
5,300
8,300
2,200
3,700
5,800
2,000
2,900
4,700
1,700
2,700
4,100
1,500
2,400
3,700
1,300
2,200
3,300
1,200
1,900
2,900
1,000
1,700
2,600
900
1,400
2,300
830
1,300
2,100
780
1,200
1,900
730
1,100
1,800
Nominal Pipe Size
5/8"
3/4"
7/8"
1-1/8"
1/2"
3/4"
199
329
501
935
275
567
131
216
346
630
189
393
107
181
277
500
152
315
90
145
233
427
129
267
79
131
198
376
114
237
72
121
187
340
103
217
62
104
155
289
89
185
55
90
138
255
78
162
48
81
122
224
69
146
43
72
109
202
63
132
39
66
100
187
54
112
36
60
93
172
48
100
CUL
CUL
CULA A A A A TIN
TING AIR & FIL
TIN
TIN
G AIR & FIL
G AIR & FILTER
G AIR & FIL
CUL
TIN
G AIR & FIL
LOW
Nominal Pipe Size
Schedule 40
1/2"
3/4"
3,200
7,500
2,200
4,200
1,800
4,000
1,600
3,700
1,500
3,400
1,300
3,100
1,200
2,600
1,000
2,300
900
2,100
830
1,900
770
1,700
720
1,500
Schedule 40
1"
1-1/4" 1-1/2"
1,071
2,205
3,307
732
1,496
2,299
590
1,212
1,858
504
1,039
1,559
448
913
1,417
409
834
1,275
346
724
1,066
307
630
976
275
567
866
252
511
787
209
439
665
185
390
590
TER
TERS S S S S
TER
TER
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