24
LP-454 REV. 1.6.15
The building owner is responsible for keeping the exhaust vent and intake pipe terminations free of snow, ice, or other potential
blockages, as well as scheduling routine maintenance. Failure to keep the vent piping terminations clear and properly maintain the
heater could result in property damage, severe personal injury, or death.
For each floor containing bedroom(s), a carbon monoxide detector and alarm shall be placed in the living area outside the bedrooms,
as well as in the room that houses the heater. Detectors and alarms shall comply with NFPA 720 (latest edition). Failure to comply with
requirements for detectors and alarms could result in property damage, severe personal injury, or death.
E. EXHAUST VENT AND INTAKE PIPE SIZING
1. The exhaust vent and intake pipe size is 4" for all PHP models.
2. The total equivalent length of exhaust vent and intake pipe should
not exceed 200 feet
.
a. The equivalent length of elbows, tees, and other fittings are listed in the Friction Loss Table, Table 5:
FRICTION LOSS EQUIVALENT IN PIPING AND FITTINGS
FITTINGS OR PIPING
EQUIVALENT FEET
3”
4”
90 DEGREE ELBOW*
5’
3’
45 DEGREE ELBOW
3’
1’
COUPLING
0’
0’
AIR INLET TEE
0’
0’
STRAIGHT PIPE
1’
1’
CONCENTRIC VENT KIT
3’
N/A
V500 2” VENT KIT
N/A
N/A
V1000 3” VENT KIT
1’
1’
V2000 4” VENT KIT
1’
1’
Table 5 - *Friction loss for long radius elbow is 1 foot less. NOTE: Consult Polypropylene venting instructions for friction loss and pressure
drop equivalents.
b. For example: If the exhaust vent has two 90° elbows and 10 feet of PVC pipe we will calculate:
Exhaust Vent Equivalent Length = (2x5) + 10 = 20 feet.
Further, if the intake pipe has two 90° elbows, one 45° elbow and 10 feet of PVC pipe, the following calculation applies:
Intake Pipe Equivalent Length = (2x5) + 3 + 10 = 23 feet.
Finally, if a concentric vent kit is used we find:
Total Equivalent Length = 20 + 23 + 3 = 46 feet.
Therefore, the total equivalent length is 46 feet which is well below the maximum of 85 feet.
c. The exhaust vent and intake pipe are intended to penetrate the same wall or roof of the building.
d. Effort should be made to keep a minimum difference in equivalent length between the exhaust vent and intake pipe.
e. The vent size on the PHP 199-119 can also be reduced
down to a 3” vent from a 4” vent in order to accommodate existing
vent
sizes. When reducing down to a 3” vent from a 4” vent on PHP199-119 models, the total length shall not exceed 100
equivalent feet. Vent reduction must begin at the heater.
Do not reduce the vent size on any model other than the PHP199-119. Doing so could result in water heater shutdown and property
damage.
3. The minimum total equivalent length is 16 feet.
Do not exceed the maximum lengths for vent pipes. Excessive length could result in water heater shutdown and property damage.
F. EXHAUST VENT AND INTAKE PIPE INSTALLATION
NOTE:
To ensure proper cooling and ventilation of components, do not block any air openings in the cabinet.
All joints of positive pressure vent systems must be sealed completely to prevent leakage of flue products into living space. Failure to
do so could result in property damage, severe personal injury, or death.
Содержание phoenix plus PHP199-119
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