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SECTION IX: OPERATING INSTRUCTIONS
WARNING
Water heaters are heat-producing appliances. To avoid damage or injury there must be no materials
stored against the water heater or direct vent system, and proper care must be taken to avoid
unnecessary contact (especially by children) with the water heater and direct vent system.
UNDER NO
CIRCUMSTANCES SHOULD FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT THINNER
BE USED OR STORED IN THE VICINITY OF THIS WATER HEATER OR IN ANY LOCATION FROM
WHICH FUMES COULD REACH THE WATER HEATER.
Installation or service of this water heater requires ability equivalent to that of a licensed tradesman in the
field involved. Plumbing, air supply, venting, gas supply, and electrical work are required.
Light the unit in accordance with the operating instructions label attached to the water heater.
Under
NO
circumstances should the input rate exceed the input rate shown on the water heater rating
plate. Over-firing could result in damage or sooting of the water heater.
If the unit is exposed to the following,
DO NOT
operate water heater until all corrective steps have been
made by a factory authorized independent service contractor or qualified service professional.
1. Flooding to or above the level of the burner or controls 2. External firing
3. External firing 4. Damage
5. Firing without water 6. Sooting
NEVER OPERATE THE WATER HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH
WATER AND THAT A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE
RELIEF VALVE OPENING OF THE WATER HEATER.
General Instructions
To Fill the Water Heater
1. Close the water heater drain valve. This water heater
utilizes a ball valve; when closing the valve, the stem
will spin indefinitely. Confirm it is closed by ensuring
the slot on the stem is perpendicular to the valve
body. If alternative water connections are provided
but not used, make certain they are plugged (i.e.
space heating & alternate top connections).
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is filled. Close the faucets and
check for water leaks at the water heater drain valve, combination temperature and pressure relief valve
and the hot and cold water connections.
Sequence of Operation
1. Thermostat starts with heating cycle.
2. Blower turns ON.
3. Blower pre-purge at reduced speed.
4. The spark generator turns on and a spark is produced at the spark rod. The fuel air mixture is lit.
5. Flame signal confirmed with main burner ON.
6. Blower remains at reduced speed for a short period to stabilize flame.
7. Blower modulates depending on heater demand.
8. Thermostat becomes satisfied.
9. Gas valve closes, then the main burner turns OFF.
10. Blower post purges, then turns OFF.
Summary of Contents for LUHE120T
Page 42: ...42 BMS Wiring Diagram...
Page 44: ...44 Lighting and Shutdown Instructions Figure 31 Lighting Instruction Label...
Page 62: ......
Page 63: ......
