ULTRAFORCE COMMERCIAL GAS WATER HEATER
SUF 120 thru 400 SERVICE HANDBOOK
CONTROL OVERVIEW – ALL MODELS
Interaction with the water heater controller is done through an LCD display called the Universal Interface Module (UIM).This screen is also referred to as the “desktop” or “desktop menu”. Up and down buttons and three operation buttons allow navigation through the control menus and to make adjustments to the water heater. Operation of the three lower buttons is defined immediately above them on the screen.
While the water heater is operating, the user interface will display the desktop screen (if there are no active faults or warnings).
●An example of this screen is shown below.
●The first temperature on this screen is the temperature of the water inside the tank.
●The second temperature on this screen is the
Operating Set Point.
●The Operating Set Point is the temperature at which the water heater will maintain the water inside the tank.
●The third line on the screen is a text description of the Operational State of the water heater. The operating state of the water heater is also indicated graphically by status icons.
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OPERATION | UP AND | |
DOWN | ||
BUTTONS | ||
BUTTONS | ||
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The table of status icons describes graphically operational details of the water heater. Below is a legend of all the status icons:
Status | Description |
Icon |
|
The temperature of the water in the tank has fallen and the water heater will now initialize a new heating cycle.
The temperature of the water in the tank has reached the Operating Set Point.
The cont rol i s un able t o i nitiate any f urther heating cycles. This is usually caused by a fault condition detected by the control, but can also occur when an external system (like an energy management sys tem) has as ked t he w ater heater to discontinue any further heat cycles.
The blower is being energized.
The blower pressure switch has been made.
The igniter has been energized.
The igniter has been energized and sufficient current for ignition has been detected.
The control has requested that the gas valve be turned on.
The control has sensed flame in the burner.
The control has detected a fault condition. A fault condition will cause the water heater to discontinue operation.
The control has detected a warning condition. These conditions w ill not cause t he water heater to discontinue further heating cycles, but does merit attention.
State Water Heaters – Technical Training Department 14 | Ashland City, Tennessee © 2009 |
Servicing should only be performed by a Qualified Service Agent |
