HWHC2100 v2.53 Operation Manual
CONFIDENTIAL
21 Harbor Park Dr. N, Port Washington, NY 11050 Phone: 516.626.72211 Fax: 516.626.7201
7
AUTO:
The controller provides automatic valve positioning in accordance with the measured temperatures,
season, time of the day, and the selected parameters. This mode is designed to be the main mode of
operation. If the system parameters are set properly, then there is no need in manual intervention in
the system performance virtually at any weather condition. The HWHC2100 is capable to keep
calculated target temperature in parameters set by ‘D_Band’ set point.
In AUTO mode the controller distinguishes four day periods (Fig.6):
1.
The morning heat-up period
starts at the‘
DAY BEGIN’
Set Point. During this period the
controller changes the valve position from nighttime to daytime temperature values with a
constant rate. The heat-up time span is variable form 0 to 100 minutes (with step of 1 minute).
2.
The morning boost period
begins immediately after the morning heat-up period ends. The
‘BOOST SPAN’ and ‘BOOST ADVANCE’ parameters define the boost duration and its
amount.
3.
Normal daytime operation
begins from the Boost period end to ‘
DAY END’
Set Point.
4.
Nighttime period
(‘
DAY END’
to ‘
DAY BEGIN’
). The amount of delivered heat can be
reduced against the daytime period, as defined by the’ NIGHT MILD WEATHER’
and
‘NIGHT SETBACK’ parameters. (Please see an example in section 6).
Notes:
The valve will be unconditionally set to 0% when:
- Out Door Temperature achieves Day time Mild Weather Set Point (at Day Time) or Night
Mild Weather Set Point (at Night time);
- Apartments temperature (Indoor Temperature) average supplied from host computer highest
then Indoor Temperature CutOff (Day/Night)set Point plus D_Band.
- If Return Water Temperature(or System Water Temperature) above the Cut Off Set Point
- If current date is between the Winter End and Winter Begin settings (Summer time).
M_SET:
(Manually Set
Temperature)
In this mode the HWHC2100 automatically keeps the Supply (System) Hot Water Temperature (or
Return Water Temperature) at the set point entered by operator within a dead band zone set by
‘D_Band’ parameter. (In case the outdoor sensor failed in AUTO mode, the HWHC2100
automatically switches to this mode of operation).
M_OPEN:
(Manually Open)
M_CLOSE:
(Manually
Close)
These modes can be used in emergency to open or close the valve fast and completely regardless of
the valve position.
The M_OPEN unconditional opening of the valve and turning pump on (if it was off).
The M_CLOSE unconditional closing of the valve. After valve close the pump will stay on for a
period of 2 seconds and will turn off.
To change the mode, select
SET OPER MODE
item in the menu, press
Enter
, then, with
Up
or
Down
key select a
new mode, and press
Enter
. When the M_SET mode is selected, the new temperature value (‘MTGTemp’) must be
entered.
