HTP PH100 User Manual

LP-179 Rev. 6.7.16
23
Friction Loss Equivalent in Piping and Fittings
Fittings or Piping
Equivalent Feet
2” 3” 4”
90 Degree Elbow* 5’ 5’ 3’
45 Degree Elbow 3’ 3’ 1’
Coupling 0’ 0’ 0’
Air Inlet Tee 0’ 0’ 0’
Straight Pipe 1’ 1’ 1’
Concentric Kit 3’ 3’ N/A
V500 2” Kit 1’ N/A N/A
V1000 3” Kit N/A 1’ 1’
V2000 4” Kit N/A 1’ 1’
Table 6 - *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
o
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
o
elbows, one 45
o
elbow,
and 10 feet of PVC pipe, the following calculation applies:
Intake Pipe Equivalent Length = (2x5) + 3 + 10 = 23 feet.
Finally, if a concentric kit is used we nd:
Total Equivalent Length = 20 + 23 + 3 = 46 feet.
The total equivalent length is 46 feet, well below the
maximum of 85 feet for 2” pipe.
c. Eort should be made to keep a minimum dierence in
equivalent length between the exhaust vent and intake pipe.
3. The minimum total equivalent length is 16 feet.
F. Longer Vent Runs
The maximum total equivalent length can be extended by
increasing the diameter of both the exhaust vent and intake
pipes equally. However, the transitions should begin a minimum
of 15 equivalent feet from the water heater.
a. The maximum total equivalent length for increased
diameter vent pipes is 125 feet for 2” transitioning to 3” pipe
(this length includes the minimum 15 total equivalent feet
necessary for transition).
NOTE: 3” vent pipe can be increased in diameter, but total
equivalent length cannot be increased beyond 200 feet.
b. Transitions should always be made in vertical sections of
Standard
Vent Connection and
Maximum Total
Equivalent Length
Reducing
Coupling
Increased Vent Size
and Maximum Total
Equivalent Length
2” (85’) 3” x 2” 3” (125’)
Table 7 - Vent Run Transition
c. If transition occurs at a distance greater than 15
equivalent feet from the water heater, the maximum
equivalent length will be reduced.
Do not exceed the maximum lengths for vent pipes. Excessive
length could result in heater shutdown and property damage.
G. Exhaust Vent and Intake Pipe Installation
All joints of positive pressure vent systems must be sealed
completely to prevent leakage of ue products into the living
space. Failure to do so could result in property damage,
serious injury, or death.
1. Use only solid PVC, CPVC, or stainless steel pipe or a
Polypropylene vent system approved for use with Category IV
appliances.
FOAM CORE PIPING IS NOT APPROVED FOR EXHAUST
VENT APPLICATIONS. Foam core piping may be used on air
inlet piping only.
2. Remove all burrs and debris from joints and ttings.
3. When using PVC or CPVC pipe, all joints must be properly
cleaned, primed, and cemented. Use only cement and primer
approved for use with the pipe material. Cement must
conform to ASTM D2564 for PVC and ASTM F493 for CPVC
pipe. NOTE: DO NOT CEMENT POLYPROPYLENE PIPE.
4. Ensure the vent is located where it will not be exposed to
prevailing winds.
5. In all roof venting applications, exhaust discharge must
point away from the pitch of the roof.
6. If the exhaust vent is to be terminated in a walled o area
Failure to provide a minimum total vent length of 16 equivalent
feet could result in property damage and improper product
operation.
E. Exhaust Vent and Intake Pipe Sizing
1. The exhaust vent and intake pipe size is 2” for 100 and 130kBTU
models and 3” for 160 and 199kBTU models.
2. The maximum total equivalent length of 2” exhaust vent and
intake pipe should not exceed 85 feet. The maximum total
equivalent length of 3” exhaust vent and intake pipe should not
exceed 200 feet.
a. The equivalent length of elbows, tees, and other ttings
are listed in the Friction Loss Table.
pipe to prevent the condensate from pooling in the vent
pipe.
Total maximum equivalent length of increased diameter
exhaust vent and intake pipe must not exceed the lengths
dened in this manual. 125 maximum total equivalent feet for
2” increased to 3” vent pipe; 200 maximum total equivalent
feet for any increase to 3” vent pipe diameter. Failure to keep
the total equivalent length below the maximum lengths
determined in this manual will result in faulty water heater
operation, substantial property damage, serious personal
injury, or death.
Transition Point
(Ft. from Heater)
TEL of Oversized
Vent Pipe (Ft.)*
Maximum TEL of
all Vent Pipe (Ft.)
15 95 125
20 77 1/2 117 1/2
25 60 1/2 110 1/2
30 43 103
35 26 96
40 8 1/2 88 1/2
NONE 0 85
Table 8 - TEL = Total Equivalent Length *Oversized vent pipe
diameter is 1” or greater than factory supplied connection.

HTP PH100 Specifications

General

Brand	HTP
Model	PH100
Category	Water Heater
Language	English