Propane Gas Tanks And Piping; Circulating Air & Filters; Ductwork - Air Flow; Filters - Read This Section Before Installing The Return Air Ductwork - Amana GUCA Installation Instructions Manual

Propane Gas Tanks and Piping

WARNING
Propane gas is heavier than air and any
leaking gas can settle in any low areas or
confined spaces. To prevent death,
personal injury, or property damage due to
fire or explosion caused by a propane gas
leak, install a gas detection warning device.
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 sus-
pected, follow the instructions on Page 4 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
11 inch w.c. 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, 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 be-
tween 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.
Since propane gas will quickly dissolve white lead and most
standard commercial compounds, special pipe dope must
be used. Shellac-based compounds resistant to the actions
of liquefied petroleum gases such as Gasolac
Clyde's or John Crane
® ®
Refer to the following illustration for typical propane gas
installations.
First Stage
Regulator
200 PSIG
Maximum
Propane Gas Installation (Typ.)
, Stalactic
®
are satisfactory.
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
XIII. Circulating Air & Filters

DUCTWORK - AIR FLOW

Duct systems and register sizes must be properly designed
for the CFM and external static pressure rating of the
furnace. Ductwork should be designed in accordance with
the recommended methods of "Air Conditioning Contrac-
tors of America" Manual D.
A duct system must be installed in accordance with Stan-
dards 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. Supply and
return connections to the furnace may be made with flexible
joints 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. 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
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 air-
stream. 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.
FILTERS - READ THIS SECTION BEFORE
INSTALLING THE RETURN AIR DUCTWORK
Filters must be used with this furnace. Discuss filter main-
,
®
tenance with the building owner. Filters do not ship with this
furnace, but must be provided by the installer. Filters must
comply with UL900 or CAN/ULCS111 standards. If the
furnace is installed without filters, the warranty will be
voided.
On upflow units, guide dimples locate the side return cutout
locations. Use a straight edge to scribe lines connecting the
dimples. Cut out the opening on these lines. NOTE: An
undersized opening will cause reduced airflow.
Upflow units with an air delivery of less than 1800 CFM
should either use the bottom return or one-side return.
Upflow units with an air delivery of 1800 CFM or higher must
either use a two-side return combination or a one-side
return and one bottom return combination. These combi-
nations provide proper airflow through the unit.
To ensure proper unit performance follow the filter sizes
given in the Specifications Sheet.
31