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Siemens 125-1957 User Manual

Page 40

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APOGEE Heat Pump Controller—Multi Stage Owner's Manual

30

Siemens Building Technologies, Inc.

Descriptor Address

Application

Description

NGT DBAND

88

2281, 2283,
2284, 2286,
2287

During night mode, this point indicates the number of degrees
above or below (depending on heating/cooling mode) the night
setpoint that the room temperature can raise or drop before the
fan will be turn ON.
Valid input: 0 to 255°F

MORN DBAND

89

2281, 2283,
2284, 2286,
2287

The number of degrees of variance from the heating or cooling
setpoint at which the controller will terminate morning warm-up or
cool-down and begin normal operation.
Valid input: 0 to 255'F

SWITCH DBAND

90

2281, 2283,
2284, 2286,
2287

The temperature range in degrees that is compared to the
difference between CTL TEMP (Point 78) and CTL STPT (Point
92). The difference exceeding this value is one of the conditions
necessary to change modes between heating and cooling.
Valid input: 0 to 255°F

AUX DSH STPT

91

2281, 2284

The setpoint of the auxiliary radiation control loop.

CTL STPT

92

2281, 2283,
2284, 2286,
2287

The actual setpoint value being used as input for the active
temperature control loop.

DISCH STPT

93

2281, 2284,
2287

The setpoint of the discharge air control loop.

MA STPT

93

2283, 2286

The setpoint of the mixed air control loop.

DSH MIN TEMP

94

2281, 2284

The minimum value to which DISCH STPT (Point 93) can be set
by the room control loop.

DSH MAX TEMP

95

2281, 2284

The maximum value to which DISCH STPT (Point 93) can be set
by the room control loop.

LOOP TIME

98

2281, 2283,
2284, 2286,
2287

The time, in seconds, between control loop calculations.

ERROR STATUS

99

2281, 2283,
2284, 2286,
2287, 2299

The status code indicating any errors detected during controller
power up. A status of 0 indicates there are no problems.