Counterflow Installations Gas Piping Checks; Piping; I Nstallations - Goodman GDVC80703B Installation Instructions Manual

G G G G G S S S S S
A S A S A S A S A S U P P L U P P L U P P LY Y Y Y Y A N D U P P L U P P L A N D A N D A N D A N D
• A ground joint union, drip leg, and manual shutoff valve
must also be supplied by the installer. In some cases, the
installer may also need to supply a transition piece from 1/
2 inch to another pipe size.
C C C C C I I I I I
OUNTERFLOW OUNTERFLOW OUNTERFLOW NSTALLATIONS NSTALLATIONS NSTALLATIONS
OUNTERFLOW OUNTERFLOW NSTALLATIONS NSTALLATIONS
When the gas piping enters through the left side of the furnace, the
installer must supply a straight pipe and a 90 degree elbow to reach
the exterior of the furnace.
A ground joint union, drip leg and manual shutoff valve must also
be supplied by the installer. In most cases, the installer may also
need to supply a transition piece from ½" to another pipe size.
When the gas piping enters through the right side of the furnace,
the installer must supply the following fittings (starting at the gas
valve):
• Close Nipple
• 90 Degree Elbow
• Straight Pipe to Reach Exterior of Furnace.
G G G G G P P P P P C C C C C
AS AS AS IPING IPING IPING HECKS HECKS HECKS
AS AS IPING IPING HECKS HECKS
Before placing unit in operation, leak test the unit and gas connec-
tions.
T
O AVOID THE POSSIBILITY OF
OR OPEN FLAME TO TEST FOR
Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
testing methods.
NOTE: NOTE: NOTE: NOTE: 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).
This unit must be isolated from the gas supply system by closing its
manual shutoff valve before pressure testing of gas supply piping
system with test pressures equal to or less than 1/2 psig (3.48 kPa).
P P P P P
IPING IPING IPING IPING IPING
WARNING
,
EXPLOSION OR FIRE NEVER USE
.
LEAKS
P P P P P G G G G G
ROPANE ROPANE ROPANE ROPANE ROPANE AS AS AS AS AS
I
F THE GAS FURNACE
AREA OR CONFINED
CONTACT A PROPANE
DEVICE IN CASE
S
•
INCE PROPANE
SETTLE IN ANY
P
•
ROPANE GAS
EXCEPT WITH
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 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 appliances in operation.
Maintaining proper gas pressure depends on three main factors:
1. Vaporization rate, depending on temperature of the liquid,
A MATCH
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 pe-
troleum gases such as Gasolac
are satisfactory.
Refer to the following illustration for typical propane gas installa-
tions and piping.
First Stage
Regulator
20
T T T T T P P P P P
ANKS ANKS ANKS ANKS AND ANKS AND AND AND AND IPING IPING IPING IPING IPING
WARNING
IS INSTALLED IN A BASEMENT
,
SPACE IT IS STRONGLY RECOMMENDED
SUPPLIER TO INSTALL A GAS
.
OF A GAS LEAK
,
GAS IS HEAVIER THAN AIR ANY
LOW AREAS OR CONFINED SPACES
,
ODORANT MAY FADE MAKING
.
A WARNING DEVICE
® , Stalactic ®
5 to 15 PSIG
(20 PSIG Max.)
200 PSIG
Second Stage
Maximum
Regulator
Propane Gas Installation (Typ.)
,
AN EXCAVATED
TO
DETECTING WARNING
LEAKING GAS CAN
.
THE GAS UNDETECTABLE
, Clyde's ® or John Crane ®
Continuous
11" W.C.