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START UPSTART UP
START UP CONDITIONS
• Avoid water heater damage
• Install thermal expansion tank or device if necessary.
• Contact qualified installer or sevice agency.
Improper Installation, use and service may result
in property damage.
CAUTION
SMOKE/ODOUR
It is not uncommon to experience a small amount of smoke and
odour during the initial start-up. This is due to burning o of oil from
metal parts, and will disappear in a short while.
PRIOR TO START UP
Installation and start up of this water heater requires abilities and
skills equivalent to that of a licensed tradesman in the eld involved.
See
Qualifications
(page 6).
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN EXPOSED
TO FLOODING OR WATER DAMAGE.
Immediately call a qualied
service technician to inspect the water heater and to make a
determination on what steps should be taken next.
Light the water heater in accordance with the Lighting and Operation
Instruction label on the water heater and in this manual.
The water heaters covered by this manual are equipped with
an electronic control system which automatically sequences the
Combustion Blower, pre- and post-purging of the combustion
chamber, the Hot Surface Igniter, the 24 Volt Gas Control Valve,
Main Burner Ignition, and ame sensing. The control system will
lock out after three unsuccessful ignition attempts. The control will
reset itself after 15 minutes. See
Control System Operation
(page 40).
Before attempting start up, thoroughly study and familiarize yourself
with the exact sequence of operation. See
Basic Sequence Of Operation
(page 49),
Burner Ignition Sequence
(page 49). Ensure the water
heater is properly grounded. Flame sensing requires an adequate
earth ground. If the water heater is not properly grounded it will cause
Ignition Failure. See
Electrical Wiring
(page 34).
Be certain that the water heater is full of water, that air is purged
from the gas and water lines and that there are no leaks in the gas
and water lines. Ensure all inlet water valves are open.
FILLING THE WATER HEATER
• Avoid water heater damage.
• Fill tank with water before operating.
Property Damage Hazard
CAUTION
Never use this water heater unless it is completely full of water.
To prevent damage to the tank, the tank must be lled with water.
Water must ow from the hot water faucet before turning ON gas
to the water heater.
To ll the water heater with water:
1. Locate the drain valve at the base of the water heater behind
the access panel. See
Features and Components
(page 8).
2. Close the water heater drain valve by turning the handle to the
right (clockwise).
3. 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.
4. To insure complete lling of the tank, allow air to exit by opening
the nearest hot water faucet. Allow water to run until a constant
ow is obtained. This will let air out of the water heater and
piping.
5. Check all water piping and connections for leaks. Repair as
needed. See
Leakage Checkpoints
(page 52).
INITIAL START UP
REQUIRED TEST EQUIPMENT
• One U-tube manometer, recommended ranges; 0-14” w.c. (0-
3.5 kPa) and 0-35” w.c. (0-8.7 kPa) or pressure gauges.
• One digital manometer can be used in place of U-tube
manometers or pressure gauges. Recommended ranges;
-14.00 to +14.00” w.c. (0-3.5 kPa) resolution 0.01” w.c. and
0-35” w.c. (0-8.7 kPa) resolution 0.10” w.c.
Note: All test equipment must be acclimated to ambient temperature
before calibration and use.
PREPARATION
1. Using the control system menus, change the temperature setpoint
to the lowest temperature setting. See
Temperature Setpoint
(page
40).
2. Close the manual gas shut o valve. See
Figure 1
(page 8).
3. Wait ve (5) minutes for any residual gas to clear.
4. Open the Main Gas Shuto Valve.
5. Measure and record the supply gas pressure, this is a “static”
supply gas pressure reading; while the water heater is not ring.
Adjust supply gas pressure as necessary. See
Gas Supply Systems
(page 34).
LIGHTING THE WATER HEATER
LIGHTING AND OPERATION LABEL
The instruction label below is axed to the water heater’s covered
by this manual at the factory and must be followed when lighting
and operating the water heater.
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