State SHE50 100 - Manual (Page 20)

20
fIllInG the water heater
Never use this water heater unless it is completely full of water.
To prevent damage to the tank, the tank must be filled with water.
Water must flow from the hot water faucet before turning “ON” gas
to the water heater.
To fill the water heater with water:
1. Close the water heater drain valve by turning the handle to the
right (clockwise). The drain valve is on the lower front of the water
heater.
2. Open the cold water supply valve to the water heater.
note: the cold water supply valve must be left open when
the water heater is in use.
3. To insure complete filling of the tank, allow air to exit by opening
the nearest hot water faucet. Allow water to run until a constant
flow is obtained. This will let air out of the water heater and the
piping.
4. Check all water piping and connections for leaks. Repair as
needed.
ventInG
Never operate the water heater unless it is vented to the outdoors.
The instructions in this section of the manual must be followed
to avoid choked combustion or recirculation of flue gases. Such
conditions cause sooting of the combustion chamber, burners and
flue tubes and creates a risk of asphyxiation.
For direct vent application where combustion air might be supplied
from extremely cold ambient through fresh air intake piping
system, it is recommended that a backflow preventer be installed
at the intake vent terminal close to the blower before proceeding
with installation of the rest of the fresh air intake piping. Call the
technical support phone number listed on the water heater label
for more information.
vent pIpe terMInatIon
The first step is to determine where the vent pipe will terminate. See
Figures 16, 17, and 18. The vent may terminate through a sidewall
as shown in Figures 16 and 17 or through the roof as shown in
Figures 18 and 19.
The vent system must terminate so that proper clearances are
maintained as cited in local codes or the current edition of the
National Fuel Gas Code, (ANSI Z223.1, 12.9.1 through 12.9.4) or
the Natural Gas and Propane Installation Code (CAN/CSA-B149.1).
See Figures 13 and 14.
Instructions on proper installation through a sidewall are provided
in Figures 15, 16A, 16B, and 17.
Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring.
Vent pipes serving power vented appliances are classified by
building codes as “vent connectors”. Required clearances from
combustible materials must be provided in accordance with
information in this manual under FACTS TO CONSIDER ABOUT
LOCATION and INSTALLING THE WATER HEATER, and with the
National Fuel Gas Code and local codes.
plannInG the vent sYsteM
Plan the route of the vent system from the exhaust elbow to the
planned location of the vent terminal.
1. Layout total vent system to use a minimum of vent pipe and
elbows.
2. This water heater is capable of venting flue gases equivalent to
45’ (13.7 m) of 2” pipe, 128’ (39 m) of 3” pipe as listed in Table 5.
table 5
number of
90° elbows
2” Maximum
pipe - ft. (m)
3” Maximum
pipe - ft. (m)
1 40 (12.19) 120 (36.57)
2 35 (10.66) 115 (35.05)
3 30 (9.14) 110 (33.52)
4 25 (7.62) 105 (32)
5 20 (6.09) 100 (30.48)
6 15 (4.57) 95 (28.95)
The minimum vent length for each of the pipe size is one 90° plus
2’ (61 cm) of straight pipe and the appropriate termination.
note: The equivalent feet (m) of pipe listed above are exclusive
of the termination. That is, the termination, with an installed
screen, is assumed to be in the system and the remainder of
the system must not exceed the lengths discussed above.
3. The exhaust elbow assembly is designed to accept only straight
sections of 2” pipe. To start, a minimum 2” (5.1cm) maximum 6”
long of 2” pipe must be inserted and glued to the exhaust elbow
assembly if utilizing 3” vent pipe. Use the same method with the
blower inlet if a direct vent configuration is utilized.
If using 2” inch vent pipe:
A minimum of 2” (5.1cm) diameter vent pipe must be attached
to the exhaust elbow assembly. The total system cannot exceed
the lengths discussed above, where each elbow is equal to 5
equivalent feet (1.5m) of straight pipe.
If using 3” inch vent pipe:
Two inches (5.1cm) of 2” pipe must be attached to the exhaust
elbow assembly before adding a reducer to acquire the
desired pipe diameter. An appropriately sized 45 degree elbow
(supplied locally-a schedule 40 DWV) vent terminal must
be obtained with an equivalent screen (supplied in vent kit).
The total system cannot exceed the equivalent pipe lengths
discussed above where each elbow is equal to 5 feet (1.5m)
of straight pipe (3” vent pipe).