5
Page
INTRODUCTION
• This manual provides information necessary for the installation, operation, and maintenance of the
water heater.
• The model description is listed on the rating plate which is attached to the side/front panel of the
water heater.
• Please read all installation instructions completely before installing this product.
• If you have any problems or questions regarding this equipment, consult the manufacturer or its
local representative.
• This equipment is an on-demand, tankless water heater designed to efficiently supply endless hot
water for your needs when properly sized and installed.
• These
high efficiency models
have a built-in secondary heat exchanger that absorbs latent heat
from the exhaust gas.
• The Indoor models are only to be installed indoors. The Outdoor models are only to be installed
outdoors.
• The principle behind tankless water heaters is simple:
Exhaust
Secondary
heat exchanger
Intake port
Condensate
drain port
Cold water inlet
Gas
Hot water outlet
Computer board
Fan motor
Gas valves
Igniter
Thermistor
Thermistor
Bypass valve
Primary
heat exchanger
Exhaust thermistor
Water control valve
Thermistor
Flow sensor
Burners
1
2
3
4
5
4
6
7
7
7
8
4
4
7
*This diagram illustrates tankless water heater design concepts only and does not accurately represent the
water heater’s physical description.
1. A hot water fixture is turned on.
2. Water flows through the heater.
3. The water flow sensor detects the water flow.
4. The computer initiates the fan motor and gas valve to let gas flow through the heater and sends a signal to
the igniter to create an ignition spark.
5. The gas ignites and flames appear within the burner chamber.
6. Water is heated as it flows through the heat exchanger.
7. Using thermistors to measure temperatures throughout the water heater, the computer modulates the gas
and water valves to ensure proper output water temperature and hot water outflows.
8. When the fixture is turned off, the unit shuts down.
Introduction
Installation Manual
Содержание 140H
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