MASCOT MSTWW, Installation And Operation Instructions Manual

Page: 46 / 68

LAARS Heating Systems
Page 44
SECTION 5. Control Display and Operation
5.5 DHW Set Point Change Mode
DHW Set Point Change Modes
The display shows the following information when
changing water heating temperature set points.
• DHW 95-120°F (35 - 49°C) LOW range (Default)
-To change LOW range,
press the C Button. The DHW icon and current DHW LOW will flash (a
flashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save setpoint changes.
• DHW 121 - 140°F (49.5 - 60°C) HIGH range
-To change HIGH range,
press and
HOLD
the C button for more than 5 seconds. The DHW icon
and current DHW HIGH will flash (a flashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save setpoint changes and to Exit.
Indicate Example
Current DHW set-point temperature
120 ° F
Temperature sign Celsius or Fahrenheit letter
°C or ° F
If water heater display is communicating with the main controller normally, the
communication icon will be indicated.
When DHW set-point range is high : from 123°F (50.5°C) to 140°F (60.0°C)
H . 140 ° F
When changing DHW setpoint, the DHW icon will flash
S24
Changing between Celsius and Fahrenheit. When the button D is pressed (for more than 5 seconds),
temperature unit will toggle between °C and °F.
The Mascot ST has a built in INLET DHW Flow Limiter
and will automatically adjust the DHW flow rate up or
down based on DHW outlet temperature at the inlet side
of the water heater. If the temperature drops below the
DHW setpoint, and the Mascot ST is at full fire, the inlet
flow to the heat exchanger will be reduced. Therefore, the
DHW outlet temperature will begin to rise to the desired
setpoint. If the temperature begins to rise above the
setpoint the flow will increase until full flow is reached.
This feature ensures that the DHW is always the ideal
temperature for the user.
If this feature is not desired, then the ‘over-ride’ to this
feature must be turned ON. To turn ON the over-ride to
the INLET DHW Flow Limiter. Refer to Section 4.18
1. Turn off the power to the Control Display.
2. Move DIP switch 4 to the OFF Position.
DANGER
Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperatures
over 125°F can cause severe burns, or death from scalding. Children, disabled,
and elderly are at highest risk of being scalded. Read all instructions before setting
temperature at appliance. Feel water before bathing or showering.
* Default DHW set-point is 120°F (49°C)