EX17DT and EX22DT Installation and Operation Manual
51
For Gas Models Sold in Massachusetts
NOTICE BEFORE INSTALLATION:
This direct-vent appliance must be installed by a
state qualified or licensed contractor and a
properly trained Rinnai Installer. If you are not
properly trained, you must not install this unit.
IMPORTANT: In the State of Massachusetts
(248 CMR 4.00 and 5.00)
For all side wall horizontally vented gas fueled
equipment 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:
1. INSTALLATION OF CARBON MONOXIDE
DETECTORS. 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
9. Appendices
9.1 Massachusetts
State Gas
Regulations
additional level of the dwelling, building or
structure served by the side wall 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
a. 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.
b. 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,
however, that during said thirty (30) day
period, a battery operated carbon
monoxide detector with an alarm shall be
installed.
2. APPROVED
CARBON
MONOXIDE
DETECTORS. Each carbon monoxide
detector as required in accordance with the
above provisions shall comply with NFPA
720 and be ANSI/UL 2034 listed and IAS
certified.
3. SIGNAGE. 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
furnace or equipment. The sign shall read,
in print size no less than one-half (1/2) inch
in size,
"GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS".
4. INSPECTION. 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.
Topics in this section
Massachusetts State Gas
Regulations
Wiring Diagram
Ladder Diagram
