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Circulating Air And Filters; Ductwork-Airflow - Whirlpool Gold WGFM195 Installation Instructions Manual

Gold gas-fired warm air furnace
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Table of Contents
Propane Gas Piping Chart I
Pipe or Tubing Length—ft (m) ³⁄₈"
150 (45.7)
175 (53.3)
200 (61)
To convert to capacities at 15 psig settings—multiply by 1.13. To convert to capacities at 5 psig settings—multiply by 0.879.
Sizing Between Single or 2
Maximum Propane Capacities Listed are Based on ¹⁄₂" W.C. pressure drop at 11" W.C. setting. Capacities in 1,000 Btu/h.
Propane Gas Piping Chart II
Pipe or Tubing Length—ft (m) ³⁄₈"
10 (3)
20 (6.1)
30 (9.2)
40 (12.2)
50 (15.2)
60 (18.3)
80 (24.4)
100 (30.5)
125 (38.1)
150 (45.7)
200 (61)
250 (76.2)
Data in accordance with NFPA pamphlet Number 54.
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.
A closed return duct system must be used, with the return
duct connected 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 return air chamber.
32
Tubing Size, O.D. Type L
¹⁄₂"
190
430
170
400
160
380
nd
Stage Regulator and Appliance*
Tubing Size, O.D. Type L
¹⁄₂"
⁵⁄₈"
39
92
199
26
62
131
21
50
107
19
41
90
18
37
79
16
35
72
13
29
62
11
26
55
10
24
48
9
21
43
8
19
39
8
17
36

CIRCULATING AIR AND FILTERS

Ductwork—Airflow
⁵⁄₈"
³⁄₄"
⁷⁄₈"
830
1,300
2,100
780
1,200
1,900
730
1,100
1,800
Nominal Pipe Size Schedule 40
³⁄₄"
⁷⁄₈"
¹⁄₂"
1¹⁄₈
329
501
935
275
216
346
630
189
181
277
500
152
145
233
427
129
131
198
376
114
121
187
340
103
104
155
289
89
90
138
255
78
81
122
224
69
72
109
202
63
66
100
187
54
60
93
172
48
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.
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.
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 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 airstream. The access panel must
be made to prevent air leaks when the furnace is in operation.
When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F (13ºC and
38ºC).
Nominal Pipe Size Schedule 40
¹⁄₂"
³⁄₄"
830
1,900
770
1,700
720
1,500
³⁄₄"
1"
1¹⁄₄"
567
1,071
2,205
393
732
1,496
315
590
1,212
267
504
1,039
237
448
913
217
409
834
185
346
724
162
307
630
146
275
567
132
252
511
112
209
439
100
185
390
1¹⁄₂"
3,307
2,299
1,858
1,559
1,417
1,275
1,066
976
866
787
665
590

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