High-Efficiency Commercial Gas Series - Service Manual
Technical Literature Department
4
Ashland City, Tennessee © 2008
Servicing should only be performed by a Qualified Service Agent
GENERAL INFORMATION
GAS PRESSURE REQUIREMENTS
INSTALLATION REQUIREMENTS FOR THE
COMMONWEALTH OF MASSACHUSETTS
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:
INSTALLATION OF CARBON MONOXIDE
DETECTORS
At the time of installation of the side wall horizontal
vented gas fueled equipment, the installing plumber
or gas fitter 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 gas fitter 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
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
CSA certified.
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 appliance 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.”
MODELS
Natural
120-150
Propane
120-150
Natural
199-250
Propane
199-250
Maximum Gas Supply Pressure
10.5” WC
(2.59kPa)
14.0“WC
( 3.45kPa)
10.5“WC
(2.59kPa)
14.0“WC
( 3.45kPa)
Nominal Gas Supply Pressure
7.0”WC
(1.74kPa)
11.0“WC
( 2.74kPa)
7.0“WC
(1.74kPa)
11.0“WC
( 2.74kPa)
Minimum Gas Supply Pressure
(Low Gas Press. Switch
Setting)
4.8”WC
(1.20kPa)
8.5“WC
( 2.12kPa)
4.8”WC
(1.20kPa)
8.5“WC
( 2.12kPa)
Manifold Pressure
4.0”WC
(0.98kPa)
10.0“WC
(2.49 kPa)
0“WC
( 0 kPa)
0“WC
( 0 kPa)
