Propane Units, Tanks, And Piping; Flue Exhaust Hood - York Sun Select YV28 Manual

• After the gas connections are complete, open
the main shut-off valve admitting normal gas
pressure to the mains. Check all joints for
leaks with soap solution or other material
suitable for the purpose. Never use a flame.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death, or property damage.
Never test for gas leaks with an open flame. Use
a commercially available soap solution made
specifically for the detection of leaks to check all
connections. This may result in a fire or explosion,
causing property damage, personal injury, or loss of
life.
CAUTION
The furnace and its individual shut-off valve must
be disconnected from the gas supply piping system
during any pressure testing at pressures greater than
1/2 PSIG (3.5 kPa). Pressures greater than 1/2 PSIG
(3.5 kPa) cause gas valve damage resulting in a
hazardous condition. If the gas valve is subjected to a
pressure greater than 1/2 PSIG (3.5 kPa), it must be
replaced. The furnace must be isolated from the gas
supply piping system by closing its individual manual
shut-off valve during any pressure testing of the gas
supply piping system at test pressures equal to or less
than 1/2 PSIG (3.5 kPa).
WARNING
Threaded joints must be coated with a sealing
compound that is resistant to the action of liquefied
petroleum gases. Do not use Teflon
Propane units, tanks, and
piping
All gas heat units are shipped from the factory
equipped for natural gas use only. The unit may be
converted in the field for use with propane gas with
an accessory kit.
All propane gas equipment must conform to the
safety standards of the National Fire Protection
Association.
For satisfactory operation, propane gas pressure
must be at the proper inlet pressure at the unit
under full load. See conversion kit instructions for
minimum and maximum supply inlet pressure.
Maintaining proper gas pressure depends on three
main factors:
Complete information regarding tank sizing for
vaporization, recommended regulator settings,
and pipe sizing is available from most regulator
manufacturers and propane gas suppliers.

Flue exhaust hood

About this task:
Combustion air intake louvers are incorporated
into the heating compartment right outside wall
and access panel. The flue exhaust is discharged
out from the side of the unit in the locations shown
in Figure 60.
Figure 60: Gas heat exhaust locations
tape.
®
Installation Manual: YORK
Johnson Controls Ducted Systems
• The vaporization rate which depends on the
temperature of the liquid and the wetted
surface area of the containers.
• The proper pressure regulation. Two-stage
regulation is recommended.
• The pressure drop in the lines between
regulators and between the second stage
regulator and the appliance. The pipe size
required depends on the length of the pipe
run and the total load of all appliances.
Note: A low gas heat unit will only use the
upper exhaust port while a high gas heat unit
will use both exhaust ports. If necessary, a flue
exhaust extension accessory may be installed
in place of the hood.
Sun™ Select YV28 to YV50
®
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