Flooding/Freezing; Filling The Water Heater; Venting; Vent Pipe Termination - A.O. Smith POWER VENT GAS Installation And Operating Manual

FLOODING/FREEZING

If this water heater has been exposed to flooding,
freezing, fi re or any unusual condition, do not put it into
operation until it has been inspected and approved by a
qualifi ed service technician. These conditions can result
in unseen internal damage and are not subject to warranty
coverage.

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. Open the nearest hot water faucet to allow
air to escape. 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 tank.
NOTE: The cold water supply valve must be left
open when the water heater is in use.
3. To insure 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.

VENTING

316888-001 Rev. 00 dRaFt Jun 28 245

VENT PIPE TERMINATION

NOT RECOMMENDED:
STREET ELBOW
BACK TO BACK ELBOWS
90° SHORT SWEEP ELBOW
(MORE RESTRICTIVE)
VENT LENGTH LESS THAN OR
EQUAL TO 6.1 EQUIVALENT
METRES (20 ft.) USE THIS SCREEN.
The venting installation must comply with CAN/CSA-
B149.1, the Natural Gas and Propane Installation Code.
The fi rst step is to determine where the vent pipe will
terminate (see Figures 24, 29 & 31). The vent may
terminate through a sidewall as shown in Figure 24 or
through the roof as shown in Figure 29.
The vent system must terminate so that proper clearances
are maintained. Guidance, based on CAN/CSA-B149.1,
the Natural Gas and Propane Installation Code, for
proper installation through a sidewall is provided in Figure
31. Vent pipes serving power vented appliances are
www.hotwater.com
PREFERRED PRACTICE:
NORMAL ELBOW
90° LONG SWEEP ELBOW
(LESS RESTRICTIVE)
FIGURE 19
VENT LENGTH GREATER THAN 6.1
EQUIVALENT METRES (20 ft.) USE
THIS SCREEN.
FIGURE 20
150mm
(6 in.) min.
19