Table of Contents
Advertisement
9
Start-up
Set Hot Water Generator (HWG) operation
Verify HWG mode
There are two (2) modes of operation for HWG. In Normal
Mode, when a HWG demand begins, the control will start
the HWG pump, turn off the boiler pump (if running), and
modulate to bring the outlet temperature to the HWG boiler
set point. The maximum firing rate may be limited in this
mode if desired.
In Zone Mode it is assumed that the indirect HWG tank is
piped as a zone on the primary loop. When a HWG demand
begins, the control will turn on the HWG pump output, and
raise the system temperature set point to the HWG boiler set
point (if higher). The boiler pump will be turned on. The
system pump may be forced on, forced off, or not changed,
depending on the System Pump Mode selected (reference
the Crest Service Manual for details). In this mode, any
low temperature zones (such as radiant heating) may need
additional controls to limit the water temperature sent to
those zones.
Set HWG boiler target temperature
When in the HWG Mode, the control will modulate to
maintain the boiler outlet temperature or system supply
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.
Set maximum HWG fan speed
If the rated input of the indirect tank is less than the
maximum output of the boiler, change the maximum HWG
fan speed setting to limit the boiler output accordingly, see
the Crest Service Manual for a detailed explanation of this
procedure.
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.
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.
48
>>
Press ENTER without a
Installation & Operation Manual
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.
The internal clock does not adjust for
NOTICE
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.
>>
>>
Advertisement
Table of Contents
