American Water Heater VG6250T76NV Series 100 ユーザーズマニュアル

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For all side wall terminated, horizontally vented power vent, direct 

vent, and power direct vent gas fueled water heaters installed in 

every dwelling, building or structure used in whole or in part for 

residential purposes, including those owned or operated by the 

Commonwealth and where the side wall exhaust vent termination 

is less than seven (7) feet above finished grade in the area of

the venting, including but not limited to decks and porches, the 

following requirements shall be satisfied:

At  the  time  of  installation  of  the  side  wall  horizontal  vented 

gas fueled equipment, the installing plumber or gasfitter shall

observe  that  a  hard  wired  carbon  monoxide  detector  with  an 

alarm and battery back-up is installed on the floor level where

the gas equipment is to be installed. In addition, the installing 

plumber  or  gasfitter  shall  observe  that  a  battery  operated  or

hard wired carbon monoxide detector with an alarm is installed 

on  each  additional  level  of  the  dwelling,  building  or  structure 

served by the sidewall horizontal vented gas fueled equipment. 

It shall be the responsibility of the property owner to secure the 

services of qualified licensed professionals for the installation of

hard wired carbon monoxide detectors.

In  the  event  that  the  side  wall  horizontally  vented  gas  fueled 

equipment is installed in a crawl space or an attic, the hard wired 

carbon monoxide detector with alarm and battery back-up may 

be installed on the next adjacent floor level.

In the event that the requirements of this subdivision can not be 

met at the time of completion of installation, the owner shall have 

a period of thirty (30) days to comply with the above requirements

provided that during said thirty (30) day period, a battery operated

carbon monoxide detector with an alarm shall be installed.

Each carbon monoxide detector as required in accordance with 

the above provisions shall comply with NFPA 720 and be ANSI/

UL 2034 listed and CSA certified.

A  metal  or  plastic  identification  plate  shall  be  permanently

mounted to the exterior of the building at a minimum height of 

eight (8) feet above grade directly in line with the exhaust vent

terminal for the horizontally vented gas fueled heating appliance 

or equipment. The sign shall read, in print size no less than one-

half (1/2) inch in size,

The  state  or  local  gas  inspector  of  the  side  wall  horizontally 

vented gas fueled equipment shall not approve the installation 

unless, upon inspection, the inspector observes carbon monoxide 

detectors and signage installed in accordance with the provisions 

of 248 CMR 5.08(2)(a) 1 through 4.

The following equipment is exempt from 248 CMR 5.08(2)(a)1

through 4:

The equipment listed in Chapter 10 entitled “Equipment Not 

1. 

Required To Be Vented” in the most current edition of NFPA

54 as adopted by the Board; and
Product Approved  side  wall  horizontally  vented  gas  fueled 

2. 

equipment installed in a room or structure separate from the 

dwelling,  building,  or  structure  used  in  whole  or  in  part  for 

residential purposes.

When the manufacturer of Product Approved side wall horizontally 

vented  gas  equipment  provides  a  venting  system  design  or 

venting system components with the equipment, the instructions 

provided  by  the  manufacturer  for  installation  of  the  equipment 

and the venting system shall include:

Detailed instructions for the installation of the venting system 

1. 

design or the venting system components; and
A complete parts list for the venting system design or venting 

2. 

system.

When  the  manufacturer  of  a  Product  Approved  side  wall 

horizontally vented gas fueled equipment does not provide the 

parts  for  venting  the  flue  gases,  but  identifies  “special  venting

systems,”  the  following  requirements  shall  be  satisfied  by  the

manufacturer:

The  referenced  “special  venting  system”  instructions  shall

1. 

be  included  with  the  appliance  or  equipment  installation 

 instructions; and 
The “special venting systems” shall be Product Approved by

2. 

the Board, and the instructions for that system shall include a 

parts list and detailed installation instructions. 

A  copy  of  all  installation  instructions  for  all  Product Approved 

side wall horizontally vented gas fueled equipment, all venting 

instructions,  all  parts  lists  for  venting  instructions,  and/or  all 

venting  design  instructions  shall  remain  with  the  appliance  or  

equipment at the completion of the installation.