Lochinvar RPV-I&S - Manual (Page 8)

8
RPV-I&S
1. When directly communicating with the outdoors, each opening must have
a minimum free area of 1 square inch per 4000 BTU (6.5 cm 2 /1.2 kw) per
hour of total input rating of all equipment in the enclosure.
2. When communicating with the outdoors through vertical ducts, each
opening must have a minimum free area of 1 square inch per 4000 BTU
(6.5 cm
2 /1.2 kw) per hour of total input rating of all equipment in the
enclosure.
3. When communicating with the outdoors through horizontal ducts, each
opening must have a minimum free area of 1 square inch per 2000 BTU
(6.5 cm
2 /0.6 kw) per hour of total input rating of all equipment in the
enclosure.
4. When ducts are used, they must 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 must be not less than 3 inches
(7.5 cm).
Specially Engineered Installations
The requirements noted under CONFINED SPACES above must 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.
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 one
having a back-flow preventer in the cold water supply, provisions must 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.
This water heater can deliver scalding temperature water at any faucet in the
system. Be careful whenever using hot water to avoid scalding injury. Certain
appliances such as dishwashers and automatic clothes washers may require
increased temperature water. By setting the thermostat on this water heater to
obtain the increased temperature water required by these appliances, you
may create the potential for scald injury. To protect against injury, install an
anti-scald tempering valve in the water system. This valve will reduce point of
discharge temperature by mixing cold and hot water in branch supply lines.
Such valves are available from the local plumbing supplier. Please consult with
a plumbing professional.
CAUTION
If sweat fittings are to be used 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.
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 THAT MIGHT RESULT FROM
EXCESSIVE TEMPERATURE AND PRESSURES.
WARNING
For protection against excessive temperatures and pressure, install
temperature and pressure protective equipment required by local codes,
but not less than a combination temperature and pressure relief valve
certified by a nationally recognized testing laboratory that maintains
periodic inspection of production of listed equipment or materials as
meeting the requirements of the Standard for Relief Valves and Automatic
Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 or the
Standard CAN1-4.4. Temperature and Pressure and the Standard CAN1-
4.4, Temperature, Pressure, Temperature and Pressure Relief Valves
and Vacuum Relief Valves. The combination temperature and pressure
relief valve shall be marked with a maximum set pressure not to
exceed the maximum working pressure of the water heater. The
combination temperature and pressure relief valve shall also have an
hourly rated temperature steam BTU discharge capacity not less than
the hourly rating of the water heater.
Install the combination temperature and pressure relief valve into the
opening provided and marked for this purpose on the water heater.
Note: Some models may already be equipped or supplied with a
combination temperature and pressure relief valve. Verify that the
combination temperature and pressure relief valve complies with local
codes. If the combination temperature and pressure relief valve does
not comply with local codes, replace it with one that does. Follow the
installation instructions above on this page.
Install a discharge line so that water discharged from the combination
temperature and pressure relief valve will exit within six (6) inches
(15.2 cm) above, or any distance below the structural floor and cannot
contact any live electrical part. The discharge line is to be installed to
allow for complete drainage of both the combination temperature and
pressure relief valve and the discharge line. The discharge opening
must not be subjected to blockage or freezing. DO NOT thread, plug
or cap the discharge line. It is recommended that a minimum clearance
of four (4) inches (10.2 cm) be provided on the side of the water
heater for servicing and maintenance of the combination temperature
and pressure relief valve.
Do not place a valve between the combination temperature and pressure
relief valve and the tank.
WARNING
Hydrogen gas can be produced in an operating water heater that
has not had water drawn from the tank for a long period of time
(generally two weeks or more). Hydrogen gas is extremely
flammable. To prevent the possibility of injury under these conditions,
we recommend the hot water faucet to be open for several minutes
at the kitchen sink before you use any electrical appliance which is
connected to the hot water system. If hydrogen is present, there
will be an unsual sound such as air escaping through the pipes as hot
water begins to flow. Do not smoke or have open flame near the
faucet at the time it is open.