Goodman ACES80 Series, Service And Troubleshooting

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SYSTEM OPERATION
20
10. Use listed gas appliance connectors in accordance with
their instructions. Connectors must be fully in the same
room as the furnace.
11. Protect connectors and semi-rigid tubing against physical
and thermal damage when installed. Ensure aluminum-
alloy tubing and connectors are coated to protect against
external corrosion when in contact with masonry, plaster,
or insulation, or subjected to repeated wetting by liquids
such as water (except rain water), detergents, or sewage.
CAUTION
E
DGE S OF S HEET METAL HOLE S MAY BE S HA R P.
U
S E GLOVE S A P R ECAUTION
WHEN R EMOVING HOLE PLUG S .
GAS PIPING CHECKS
Before placing unit in operation, leak test the unit and gas
connections.
WARNING
T
O AVOID THE PO SS IBLITY OF E X PLO S ION O R FI R E, NEVE R U S E A MATCH
O R OPEN FLAME TO TE S T FO R LEA KS .
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
pressures 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).
PROPANE GAS TANKS AND PIPING
WARNING
P
R OPANE GA S I S HEAVIE R THAN AI R AND ANY LEA K ING GA S CAN S ETTLE IN
ANY LOW A R EA S O R CONFINED S PACE S .
T
O P R EVENT P R OPE R TY DAMAGE,
PE RS ONAL IN J U R Y, O R DEATH DUE TO FI R E O R E X PLO S ION CAU S ED BY A
P R OPANE GA S LEA K , IN S TALL A GA S DETECTION WA R NING DEVICE.
A gas detecting warning system is the only reliable way to
detect a propane gas leak. Iron oxide (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 this page.
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 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.
Always use a pipe sealant approved for natural gas and LP
gas.
Refer to the following illustration for typical propane gas
installations and piping.
200 PSIG
Maximum
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
First Stage
Regulator
Typical Propane Gas Installation
WARNING
I
F THE GA S FU R NACE I S IN S TALLED IN A BA S EMENT, AN E X CAVATED
A R EA O R A CONFINED S PACE, IT I S S T R ONGLY R ECOMMENDED TO
CONTACT A P R OPANE S UPPLIE R TO IN S TALL A GA S DETECTING
WA R NING DEVICE IN CA S E OF A GA S LEA K .
•
S
INCE P R OPANE GA S I S HEAVIE R THAN AI R , ANY LEA K ING GA S CAN
S ETTLE IN ANY LOW A R EA S O R CONFINED S PACE S .
•
P
R OPANE GA S ODO R ANT MAY FADE, MA K ING THE GA S UNDETECTABLE
E X CEPT WITH A WA R NING DEVICE.