79
21.6.5
S
ET
P
OINT
(1
-
3)
AT
H
IGH
O
UTDOOR
T
EMPERATURE
When the outdoor air temperature rises to or above Outdoor (1 - 3) High parameters, the calculated set point will be
at this setting (FIG. 1-1). These parameters can be changed by the installer by accessing the Set point 1 at High
Outdoor Temp 1, Set point 2 at High Outdoor Temp
2 and Set point 3 at High Outdoor Temp 3 parameters. The temperature range of this parameter is 20°C to 88°C. The
default value is 21°C.
21.6.6
O
UTDOOR
A
IR
S
HUTDOWN
(SH1
-
SH3)
When the outdoor temperature rises above this point, the control will block the corresponding SH demand
(DHW demands will still be active). These parameters can be changed by the installer by accessing the Outdoor Air
Shutdown SH1, SH2, and SH3 parameters. The temperature range of this parameter is 0°C to 40°C. The default
value is 21°C.
21.6.7
O
UTDOOR
A
IR
S
HUTDOWN
D
IFFERENTIAL
(SH1
-
SH3)
The outdoor air shutdown differential parameter is the number of degrees below Outdoor Air Shutdown SH1, SH2,
and SH3 parameters the outdoor air temperature must go before the boiler will respond to the corresponding SH
demand. These parameters can be changed by the installer by accessing the Outdoor Air Shutdown Differential
SH1, SH2, and SH3 parameters The temperature range of this parameter is 0°C to 30°C. The default value is 6°C.
21.6.8
S
HIFT
R
ESET
C
URVE
(SH1
-
SH3)
There is a shift reset parameter for each outdoor reset curve. The shift reset parameter shifts the actual set point
above or below the calculated set point by the number of degrees in this parameter. These parameters can be
changed by the installer by accessing the Shift Reset Curve SH1, SH2, and SH3 parameters. The temperature range
of this parameter is -10°C to 10°C. The default value is 0°C. This feature will be active if this parameter is set to
anything other than 0°C.
21.6.9
B
OOST
T
EMPERATURE
If a SH demand lasts longer than the programmed time delay setting and there have been no DHW demands, the
control will increase the water temperature set point by the amount in this parameter. If the SH demand continues
through another time period, the set point will be increased again. This will continue until either the SH demand ends,
a maximum of 20 increases has occurred, or SH1, SH2, SH3 maximum set point has been reached. Once the SH
demand has been satisfied the set point will revert back to its calculated setting. The boost temperature can be
changed by the installer by accessing the Boost Temperature parameter. The temperature range of this parameter is
0°C to 14°C. The default value is 0°C. This feature will be active if this parameter is set to anything other than 0°C.
21.6.10
B
OOST
T
IME
The boost time parameter sets the amount of time that must elapse with a SH demand before the water temperature
calculated set point will be increased. This parameter can be changed by the installer by accessing the Boost Time
parameter. The time range for this parameter is 0 minutes to 55 minutes. The default value is 0 minutes.
Summary of Contents for HERALD HCB116CE
Page 8: ...8 3 1 2 PRINCIPLE PARTS TO BE USED IN CONJUNCTION WITH TABLE 3 1 1...
Page 31: ...31 Max distance between brackets...
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Page 53: ...53 15 8 WIRING DIAGRAM 15 8 1 WIRING DIAGRAM...
Page 54: ...54 15 9 LADDER DIAGRAM 15 9 1 LADDER DIAGRAM...
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