Weather-Rite TT Series, Инструкция по установке, эксплуатации и обслуживанию

Страница: 84 / 205

TT-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
78 of 198
1 8 .3 Gas Manifold Ventin g
Vent v al v es fitted on XL-compliant manifolds on
indoor installed air handlers m u st b e piped to the
atmosphere o u tside the str u ct u re. This is the
responsi b ility of the installer.
1 8 .3.1 Vent Line Installation
The follo w ing may b e u sed as a g u ideline for
installation, bu t all applica b le codes and reg u lations
m u st b e follo w ed.
• Nat u ral gas and LPG are toxic and flamma b le
s ub stances. They m u st b e released w here they
w ill not ca u se personal inj u ry or property damage.
The end of the v ent line m u st b e located w here it
is safe to release gas.
• Pipe the v ent line o u tside the str u ct u re.
• Use as short a v ertical r u n of pipe as possi b le.
• Do not r u n pipe from a high point to a lo w er point
to a v oid o b stacles.
• Use a minim u m n u m b er of b ends.
• Do not do w nsize the pipe from the origination
point (m u st b e same size or larger).
• Make s u re v ent line is free from o b str u ctions.
• Do not gro u p v ent lines together into a common
header.
• The o u tside termination m u st ha v e a
w eatherproof cap or b e directed do w n w ard for
protection from the elements and m u st b e
screened to pre v ent the entry of any o b jects.
FIGURE 62: ANSI less than 1000 MBH, FM Less 700 MBH Manifold
PILOT GAS REGULATOR
CONTROLS THE AMOUNT OF
GAS FLOW TO THE
BURNER'S PILOT TUBE.
BLOCK GAS SOLENOID VALVE.
SECONDARY BACK-UP VALVE TO
PREVENT GAS FROM REACHING
BURNER DURING SHUTDOWN.
MAIN GAS PRESSURE REGULATOR
CONTROL THE FLOW OF GAS TO
THE MAIN BURNER & TO SET
THE HIGH FIRE ON THE BURNER
PILOT SHUT-OFF COCK
MANUAL SHUT OFF THAT ISOLATES
THE PILOT GAS ASSEMBLY FROM
THE MAIN GAS SUPPLY.
MAIN GAS SOLENOID VALVE.
OPENS & CLOSES ALLOWING
GAS TO FLOW TO THE BURNER.
PILOT SOLENOID VALVE.
ALLOWS GAS TO FLOW TO
THE BURNER PILOT.
METERING VALVE.
CONTROLS THE FLOW OF
GAS TO THE MAIN BURNER
& TO SET THE LOW FIRE
ON THE BURNER.
HIGH GAS PRESS. SWITCH
PROTECTS AGAINST EXCESSIVE GAS
PRESSURE