Crestron electronic Crest Condensing Boiler 3.5 - Manual (Page 45)

45
Installation & Operation Manual
Set Hot Water Generator (HWG) operation
Verify HWG circulator mode
The HWG Mode is programmed to heat an indirect hot
water tank. When a tank thermostat or a tank sensor initiates
a call for heat, the SMART TOUCH control will turn on the
HW pump and turn off the boiler pump (if running). If the
system pump is running, it will remain on. When the HW
call for heat ends, and there is no space heating call for heat,
the HW pump will continue to run for a period of time. This
pump delay is set at the factory to 60 seconds. If a shorter
or longer delay is desired, the appropriate parameter in the
control must be changed. See the Crest Service Manual for
a detailed explanation of this procedure. If there is an active
space heating call for heat, then the boiler pump will be
turned on and the HW pump will be turned off.
Set HWG target temperature
When in the HWG Mode, the control will modulate to
maintain the outlet temperature to a set point. This set point
is set at the factory to 180°F. If a different set point is desired,
the appropriate parameter in the control must be changed.
See the Crest Service manual for a detailed explanation of
this procedure.
If a tank sensor is installed, the HWG heat demand will start
when the tank temperature drops 6°F below the tank set
point, and stop when the tank temperature reaches the tank
set point. The tank set point is set at the factory to 120°F
(49°C).
Set clock
Press the following buttons to program the clock:
After pressing SETUP, the Password Screen will appear.
Entering the correct password will allow access to all Installer
Level adjustable parameters. Press ENTER without a
password to access the User Level parameters.
The SMART TOUCH control has a built-in clock that it uses
for its night setback feature and for logging events. This
clock must be set when the boiler is installed, and anytime the
boiler has been powered off for more than one day. Use the
following procedure to set the clock:
1. To set the clock, highlight Clock using the arrows and
press the SELECT button. Use the left and right arrows
to select hours, minutes, AM/PM and the up and down
arrows to set.
2. To set the date, highlight Date using the arrows and
press the SELECT button. Use the left and right arrows
to select the day of the week and the up and down
arrows to set.
NOTICE
The internal clock does not adjust for
Daylight Savings Time and therefore, will
require a manual adjustment.
Configuration of the cascade
When installed in a Cascade system, the individual controls
must be programmed for cascade operation. To program the
cascade parameters, access the Cascade Menu found in the
Setup Menu by pressing the following buttons:
After pressing SETUP, the correct installer password MUST BE
entered.
1. Once in the Cascade Setup Menu select the appropriate
parameter using the arrows and press the SELECT button.
2. The description of the selected parameter and its current
setting will appear at the bottom of the screen.
3. To adjust the parameter, press the + or - buttons to change
the value being displayed.
4. Make the correct adjustments and then press the SAVE
button.
5. Once all the parameters have been adjusted press the BACK
button. This will return you to the Cascade Screen.
Note: The SAVE button must be pressed to ensure proper
programming of the controls. Failure to press the SAVE button
will require all changes to be reprogrammed.
9
Start-up
(continued)
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