State SDV 75 70 NE/PE - Manual (Page 15)

15
FIGURE 12. GAS PIPING WITH ALL
BLACK IRON PIPE TO GAS CONTROL VALVE.
SEDIMENT TRAPS
A sediment trap shall be installed as close to the inlet of the water
heater as practical at the time of water heater installation. The
sediment trap shall be either a tee fi tting with a capped nipple in the
bottom outlet or other device recognized as an effective sediment
trap. If a tee fi tting is used, it shall be installed in conformance with
one of the methods of installation shown in Figures 11 and 12.
Contaminants in the gas lines may cause improper operation of the
gas control valve/thermostat that may result in fi re or explosion. Before
attaching the gas line be sure that all gas pipe is clean on the inside. To trap
any dirt or foreign material in the gas supply line, a drip leg (sometimes
called a sediment trap) must be incorporated in the piping. The drip leg
must be readily accessible. Install in accordance with the “Gas Piping”
section. Refer to the current edition of the National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
FIGURE 13.
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 fi lled with water. Water must fl ow
from the hot water faucet before turning “ON” gas to the water heater.
To fi ll 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 ensure complete fi lling of the tank, allow air to exit by opening
the nearest hot water faucet. Allow water to run until a constant fl ow
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.
BLOWER ASSEMBLY INSTALLATION
SEQUENCE OF INSTALLATION
1. This power direct vent water heater comes with the blower
assembly installed.
2 After the unit is set in place, make sure the blower assembly is still
mounted securely, and make sure there is no damage to the blower.
3. Make sure there is no packing material in the discharge of the
blower or the intake, see Figure 14.
4. Make sure that the rubber tubing is still attached from the air
pressure switch to the port on the blower housing. Make sure
the rubber tubing is not folded anywhere between the pressure
switch and the blower housing.
5. Make sure the ON/OFF switch is in the OFF position and that the
wiring harness is connected from the blower control box to the
connector on the bottom side of the gas control valve/thermostat.
6. If the wiring harness is not factory installed, make sure the ON/
OFF switch is in the OFF position and then connect the wiring
harness from the blower control box to the connector on the
bottom side of the gas control valve/thermostat.
7. This water heater is a polarity sensitive appliance and will not
operate if the power supply polarity is reversed. The power supply
or outlet providing power to this water heater must be wired
properly (correct polarity).
8. Do not plug in power cord until vent system is completely installed.
This power direct vent heater operates on 110-120 Vac, therefore
a grounded outlet must be within reach of the six (6) foot (1.8 m)