HWHC2100 v2.53 Operation Manual
CONFIDENTIAL
21 Harbor Park Dr. N, Port Washington, NY 11050 Phone: 516.626.72211 Fax: 516.626.7201
8
7. Operation Parameters
To provide correct and reliable operation of the HWHC2100 the operational parameters must be set properly.
The parameter section of the menu is divided in two parts (MAINTENANCE and SETUP). Each part protected with a
password. Use following tables as guidelines when selecting parameters' values:
MAINTENANCE
(password:CACADCB)
Parameter
Description
Heat Gain
Determines ratio between the System Hot Water Temperature and Outdoor Temperature.
Fig. 3a,b represents the family of control curves with different Heat Gain as parameter when Mild Weather is
70°F (Fig.3a) and Mild Weather is 55°F (Fig.3b). With any of the ratios, the colder it becomes outside, the hotter
the temperature of the system water. On the both examples Compensator=0 and NIGHT SETBACK=0.
Positive Compensator values shift the curve up, negative - down.
Positive Night Setback values shift the curve down.
Positive Compensator values shift the curve up, negative - down.
Positive Night Setback values shift the curve down.
Implemented 10 different ratios:
1:3; 1:2; 1:1.5; 1:1.25; 1:1; 1.25:1; 1.5:1; 2:1; 3:1; 4:1.
Ratio 4:1
(OD : ST) - the outdoor temperature would have to drop 4° to increase the system water temperature
by 1 degree.
Ratio 1:3
(OD : ST) - for each 1 degree drop in outdoor temperature the hot water temperature will increase by
3 degree.
Default ratio
is 1:1;
Fig.3a Heat Gain
Ratio (Mild
Weather is 70°F )
curves.
70
100
130
160
190
220
250
-20
-10
0
10
20
30
40
50
60
70
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
