Circulating Air - Amana MVC80 Installation Instructions Manual

p g t
ropAne AS AnkS And
I
F THE GAS FURNACE IS INSTALLED IN A BASEMENT
,
AREA OR CONFINED SPACE IT IS STRONGLY RECOMMENDED TO
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
EXCEPT WITH A WARNING DEVICE
A gas detecting warning system is the only reliable way to de-
tect 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 3 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
10 inch WC at the furnace manifold with all gas appli ances
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 con tainer 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 vaporiza tion,
recommended regulator settings, and pipe sizing is available
from most regulator manufacturers and propane gas suppliers.
Use a pipe thread compound that is approved for natural gas
and LP Gas.
Refer to the following illustration for typical propane gas in-
stallations and piping.
First Stage
Regulator
200 PSIG
Maximum
Propane Gas Installation (Typ.)
p
iping
WARNING
,
AN EXCAVATED
.
,
ANY LEAKING GAS CAN
.
,
MAKING THE GAS UNDETECTABLE
.
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
Figure 9
p g p
ropAne AS iping
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 Size, O.D. Type L
Tubing
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
Sizing Between Second Stage and Appliance 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 Size, O.D. Type L
Tubing
Length,
3/8" 1/2" 5/8"
Feet
10 39 92 199
20 26 62 131
30 21 50 107
40 19 41 90
50 18 37 79
60 16 35 72
80 13 29 62
100 11 26 55
125 10 24 48
150 9 21 43
200 8 19 39
250 8 17 36
a
C
irCulating ir
N
EVER ALLOW THE PRODUCTS OF COMBUSTION
,
MONOXIDE TO ENTER THE RETURN DUCT WORK OR CIRCULATION AIR
.
SUPPLY
Duct systems and register sizes must be properly designed
for the CFM and external static pressure rat ing of the fur-
nace. Ductwork should be designed in accor dance 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 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. For installations requiring
more than 1800 CFM, use a bottom return or two sided return.
Supply and return con nections to the furnace may be made
with flexible joints to reduce noise transmission. To prevent
the blower from inter fering 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 furnace should be installed in parallel with or on the
17
C
hArtS
Nominal Pipe Size
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
Schedule 40
3/4" 7/8" 1-1/8" 1/2" 3/4"
329 501 935 275 567 1,071 2,205 3,307
216 346 630 189 393 732
181 277 500 152 315 590
145 233 427 129 267 504
131 198 376 114 237 448
121 187 340 103 217 409
104 155 289 89 185 346
90 138 255 78 162 307
81 122 224 69 146 275
72 109 202 63 132 252
66 100 187 54 112 209
60 93 172 48 100 185
WARNING
,
INCLUDING CARBON
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
1" 1-1/4" 1-1/2"
1,496 2,299
1,212 1,858
1,039 1,559
910 1,417
834 1,275
724 1,066
630 976
567 866
511 787
439 665
390 590