High Altitude Derate; Propane Gas Conversion; Gas Piping Connections - Amana GDH8 Installation Instructions Manual

H A D
IGH LTITUDE ERATE
IMPORTANT NOTE: The furnace, as shipped, requires no
change to run between 0 - 5500 feet. Do not attempt to increase
the firing rate by changing orifices or increasing the manifold
pressure below 5500 feet. This can cause poor combustion
and equipment failure.
High altitude installations above 5500 feet may require both a
pressure switch and an orifice change. These changes are
necessary to compensate for the natural reduction in the den-
sity of both the gas fuel and the combustion air at higher alti-
tude.
For installations above 5500 feet, please refer to your distribu-
tor for required kit(s).
Contact the distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude instal-
lations. The indicated kits must be used to insure safe and
proper furnace operation. All conversions must be performed
by a qualified installer, or service agency.
P G C
ROPANE AS ONVERSION
P
OSSIBLE PROPERTY DAMAGE
OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED
APPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER
. A
FURNACE OPERATION LL CONVERSIONS MUST BE PERFORMED BY A
QUALIFIED INSTALLER OR SERVICE AGENCY
This unit is configured for natural gas. The appropriate
manufacturer's propane gas conversion kit, must be applied for
propane gas installations. Refer to the "Propane Gas and/or
High Altitude Installations" section for details.
If converting to LP gas, it is recommended that an LPLP0* kit
also be installed. The use of this kit will prevent the furnace
from firing when the LP gas supply pressure is too low to sup-
port proper combustion.
Models using Single Stage Gas Valves
Altitude Gas Kit
Natural None
0 - 5500
Propane LPT-03
NOTE: *MS81405DN** models utilize #43 orifices in Natural gas
applications.
WARNING
,
PERSONAL INJURY OR DEATH MAY
.
Manifold Pressure
Orifice
Pressure
#45 3.5" w .c.
#55 10.0" w .c.
Models using 2-Stage Gas Valves
Gas Altitude
Natural
0 - 5500
Propane
NOTE: *MH81405DN** models utilize #43 orif ices in Natural gas
applications.
Contact your distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude instal-
lations. The indicated kits must be used to insure safe and
proper furnace operation. All conversions must be performed
by a qualified installer, or service agency.
G P C
AS IPING
T
O AVOID POSSIBLE UNSATISFACTORY OPERATION
DAMAGE DUE TO UNDERFIRING OF EQUI
/
OF NATURAL
/
THE METER TANK TO THE FURNACE
. T
HE
When sizing a trunk line, be sure to include all appliances
which will operate simultaneously.
The gas piping supplying the furnace must be properly sized
based on the gas flow required, specific gravity of the gas, and
length of the run. The gas line installation must comply with
local codes, or in their absence, with the latest edition of the
National Fuel Gas Code, NFPA 54/ANSI Z223.1.
Length of
Pipe in Feet
10
20
30
40
50
60
70
80
90
Sw itch
100
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on
0.60 Specific Gravity Gas)
CFH = BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
None
To connect the furnace to the building's gas piping, the installer
must supply a ground joint union, drip leg, manual shutoff valve,
and line and fittings to connect to gas valve. In some cases,
the installer may also need to supply a transition piece from 1/
2" pipe to a larger pipe size.
The following stipulations apply when connecting gas piping.
• Use black iron or steel pipe and fittings for the building
piping.
20
M anifold Pre s s ure
Kit Orifice
High
Stage
None #45 3.5" w .c.
LPM-06 #55 10.0" w .c.
ONNECTIONS
WARNING
PMENT
PROPANE GAS PIPING NEEDED WHEN RUNNING PIPE FROM
.
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)
Nominal Black Pipe Size
1/2" 3/4" 1"
132 278 520
92 190 350
73 152 285
63 130 245
56 115 215
50 105 195
46 96 180
43 90 170
40 84 160
38 79 150
Pre s s ure
Sw itch
Low
Change
Stage
1.9" w .c. None
6.0" w .c. None
OR EQUIPMENT
,
USE THE PROPER SIZE
1 1/4" 1 1/2"
1050 1600
730 1100
590 980
500 760
440 670
400 610
370 560
350 530
320 490
305 460