11
All Air From Inside the Building:
The confined space shall be provided
with two permanent openings communicating directly with an additional
room(s) of sufficient volume so that the combined volume of all spaces meets
the criteria for an unconfined space. The total input of all gas
utilization equipment installed in the combined space shall be considered in
making this determination. Each opening shall have a minimum free area of
1 square inch per 1000 BTU
(2.54cm
2
/.29kw)
per hour of the total input rating
of all gas utilization equipment in the confined space, but not less than 100
square inches
(254cm
2
)
. One opening shall be within 12 inches
(31cm)
of the
top and one within 12 inches
(31cm)
of the bottom of the enclosure.
All Air From Outdoors
: The confined space shall be provided with two
permanent openings, one commencing within 12 inches
(31cm)
of the top and
one commencing within 12 inches
(31cm)
from the bottom of the enclosure.
The openings shall communicate directly, or by ducts, with the outdoors or
spaces (crawl or attic) that freely communicate with the outdoors.
1. When directly communicating with the outdoors, each opening shall have
a minimum free area of 1 square inch per 4000 BTU
(2.54cm
2
/1.2kw)
per
hour of total input rating of all equipment in the enclosure.
2. When communicating with the outdoors through vertical ducts, each
opening shall have a minimum free area of 1 square inch per 4000 BTU
(2.54cm
2
/1.2kw)
per hour of total input rating of all equipment in the
enclosure.
3. When communicating with the outdoors through horizontal ducts, each
opening shall have a minimum free area of 1 square inch per 2000 BTU
(2.54cm
2
/.6kw)
per hour of total input rating of all equipment in the
enclosure.
4. When ducts are used, they shall be of the same cross-sectional area as
the free area of the openings to which they connect. The minimum
dimension of rectangular air ducts shall be not less than 3 inches
(7.5cm)
Specially Engineered Installations
The requirements noted under CONFINED SPACES above shall not
necessarily govern when special engineering, approved by the authority
having jurisdiction, provides an adequate supply of air for combustion,
ventilation, and dilution of flue gases.
12
WATER CONNECTIONS
Note: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE
MAIN WATER SUPPLY VALVE.
After shutting off the main water supply, open a faucet to relieve the water
line pressure to prevent any water from leaking out of the pipes while making
the water connections to the water heater. After the pressure has been
relieved, close the faucet. The COLD water inlet and HOT water outlet are
identified on the top of the water heater. The fittings at the cold water inlet
and hot water outlet are dielectric waterway fittings with 3/4” NPT male
thread. Make the proper plumbing connections between the water heater and
the plumbing system to the house. Install a shut-off valve in the cold water
supply line.
If this water heater is installed in a closed water supply system, such as the
one having a back-flow preventer in the cold water supply, provisions shall be
made to control thermal expansion.
DO NOT
operate this water heater in a
closed system without provisions for controlling thermal expansion. Your
water supplier or local plumbing inspector should be contacted on how to
control this situation
After installation of the water lines, open the main water supply valve and fill
the water heater. While the water heater is filling, open several hot water
faucets to allow air to escape from the water system. When a steady stream
of water flows through the faucets, close them and check all water
connections for possible leaks.
NEVER OPERATE THE WATER HEATER
WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER.
WARNING
FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED 3/4” X 3/4”
TEMPERATURE AND PRESSURE RELIEF VALVE WILL RELEASE THE
MANUFACTURER FROM ANY CLAIM WHICH MIGHT RESULT FROM
EXCESSIVE TEMPERATURE AND PRESSURES.
CAUTION
If sweat fittings are to be use,
DO NOT
apply heat to the nipples on top of
the water heater. Sweat the tubing to the adapter before fitting the adapter
to the water connections. It is imperative that heat is not applied to the
nipples containing a plastic liner.
Содержание mi5036en10
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