Marey 26HW70 A, Instructional Manual, Page: 8 / 33

08
- This manual provides information necessary for the installation, operation, and mainte-
nance of the water heater.
- The model description is listed on the name plate which is attached to the right side of the
case of the water heater. (Please refer to p.12)
- Please read all installation instructions completely before installing this product.
- The Water Heater is an instantaneous water heater designed to efficiently supply endless
hot water on demand.
THE PRINCIPLE OF THE WATER HEATER IS SHOWN BELOW:
OPERATION PROCESS OF GAS WATER HEATER:
①
. A hot water tap is turned on.
②
. Water enters the water heater via the cold water inlet.
③
. The water flow sensor detects the water flow.
④
. The computer automatically ignites the burner.
⑤
. Water circulates through the heat exchanger and is heated
⑥
. The computer will modulate the gas supply valve and water flow to
produce the right amount of hot water at the correct temperature.
⑦
. When the tap is turned off, the unit shuts down.
3. INTRODUCTION
Cold
Water Inlet
Gas Inlet
A.C. 110V
Hot Water
Outlet
Gas proportion valve
Water temperature probe
Computer board
Heat Exchanger
Exhaust
Burner
Fan
Water Flow Sensor
Water temperature probe