HWHC2100 v2.53 Operation Manual
CONFIDENTIAL
21 Harbor Park Dr. N, Port Washington, NY 11050 Phone: 516.626.72211 Fax: 516.626.7201
9
Fig.3b Heat Gain
Ratio (Mild
Weather is 55°F )
curves.
70
100
130
160
190
220
250
-20
-10
0
10
20
30
40
50
Outdoor Temperature (in F)
S
y
s
te
m
W
a
te
r
T
e
m
p
e
ra
tu
re
(
in
F
)
1:3
1:2
1:1.5
1:1.25
1:1
1.25:1
1.5:1
2:1
3:1
4:1
Compensator
The Compensator parameter provides day(or night) adjustment to the amount of heat being delivered to compensate
for the influence of extreme weather condition. When calculating target temperature, the controller, adds or subtracts
the Compensator value from the calculated temperature. Therefore, any change made to the Compensator will
change the value of the calculated target temperature by the same amount and will change position of the valve.
Positive values of the parameter increase heat delivery (more opens valve), while negative values reduce it (closes
the valve). Fig.4 illustrates effects of the Compensator on the control curve.
Range: -40°F to +40°F with 1° step. Default value is 0°F.
D:Mild
(DAY MILD
WEATHER)
The controller closes the valve completely when the outdoor temperature is higher than this parameter and the
time between 5AM and 10PM. The Pump will work on for a period of time set by the ‘PumpRunDelay’ setpoint
and will turn off.
Range: 40° to 80 °F with 1° step. Default value is 55°F.
N:Mild
(NIGHT
MILD
WEATHER)
If the outdoor temperature is higher than this parameter and the time is between 10PM and 5AM, then the valve
is closed completely. The Pump will work on for a period of time set by the ‘PumpRunDelay’ setpoint and will
turn off.
If the outdoor temperature is lower than this parameter and the time is between 10PM and 5AM, then the valve
position is corrected in accordance with the ‘NIGHT SETBACK’ parameter.
Range: 20° to 60 °F with 1° step. Default value is 40°F.
N:Stbk
(NIGHT
SETBACK)
The controller subtracts from
the previously calculated target temperature
the ‘NIGHT
SETBACK’ value to
reduce heat delivery during the nighttime.
Range: 0° to 80 °F with 1° step. Default value is 10°F.