LAARS NeoTherm NTV600 - Install and Operating Manual User Manual
This addendum applies to the following document, Change to table 2. (page 11)
Addendum to Instructions
Vent and Air Intake Lengths for use with
Laars Neotherm NTH600 & NTV600 Appliances
This Addendum applies to the following Document:
Models Affected
Size
Part No.
Doc. No.
NeoTherm (NTH, NTV)
600
H2335500G
Doc. 1218G
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler installation and maintenance. Improper installation and/or operation could
create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
Improper installation and/or operation will void the warranty. For indoor installations, as an additional
measure of safety, Laars strongly recommends installation of suitable Carbon Monoxide detectors in the
vicinity of this appliance and in any adjacent occupied spaces.
INTAKE / EXHAUST
STANDARD
MAX EQUIV.
OPTIONAL
MAX EQUIV.
SIZE
VENT
FT.
M
VENT
FT.
M
80
2"
40
6.1
3"
100
30.5
105
2"
40
6.1
3"
100
30.5
150
3"
100
30.5
n/a
—
—
199/210
3"
100
30.5
n/a
—
—
285
4"
100
30
n/a
—
—
399
4"
100
30
n/a
—
—
500
4"
100
30
n/a
—
—
*
600*
4"
40
6.1
6"
100
30
750
4"
40
6.1
6"
100
30
850
4"
40
6.1
6"
100
30
Installations in the U.S. require exhaust vent pipe that is a combination of
PVC & CPVC complying with ANSI/ASTM D1785 F441 or stainless
steel complying with UL1738. Installations in Canada require exhaust
vent pipe that is certified to ULC S636.
Intake (air) pipe must be PVC or CPVC that complies with ANSI/ASTM
D1785 F441, ABS that complies with ANSI/ASTM D1527 or galvanized
material.
Installer must comply fully with manufacturer's installation instructions,
including use of minimum exhaust length CPVC, to maintain ANSI
Z21.13 safety certification.
Closet and alcove installations do not allow the use of PVC under any
circumstances
To calculate max equivalent length, measure the linear feet of the pipe,
and add 5 feet (1.5m) for each elbow used.
*
For any combination of vent and intake lengths up to 40 equivalent feet,
any even or uneven combination of length is allowed. For overall lengths
greater than 40 equivalent feet, the exhaust may be up to 20 feet greater
than the intake length.
Table 2. Vent / Air Pipe Sizes.
Change to Table 2. (page 11):
Description of Change: In the interest of continuing
product improvement and maintaining product reliability
and safety, Laars has revised the allowable exhaust vent
and combustion air intake lengths for the NTH600 and
NTV600 boilers as follows:
4" diameter PVC, CPVC or stainless material is allowed
in lengths up to 40 equivalent feet for each intake and
vent section.
6" diameter PVC, CPVC or stainless material is allowed
in lengths up to 100 equivalent feet for each intake and
vent section with the following considerations:
For any combination of vent and intake lengths up to 40
equivalent feet, any even or uneven combination of length is
allowed.
For overall lengths greater than 40 equivalent feet, the
exhaust may be up to 20 feet greater than the intake length.
Example 1: If the exhaust is 40 equivalent feet, then the
intake length can be zero, and as long as 40 equivalent
feet.
Example 2: If the exhaust is 90 equivalent feet, then the
intake length can be as little as 70 equivalent feet, and as
long as 100 equivalent feet.
Example 3: If the exhaust is 50 equivalent feet, then the
intake length can be as little as 30 equivalent feet, and as
long as 100 equivalent feet.
Litho in U.S.A. © Laars Heating Systems 1109 H2350600-