Honeywell Local Operator Interface S7999B User Manual

Page 22

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S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

65-0303—05

Fig. 39. R7911 Steam Configuration.

Outdoor Reset Parameters
(R7910A Hydronic Control Only)

Table 10 displays Outdoor Reset configuration parameters.

Pressing the left or right arrow displays Lead Lag, which lists

the same parameters.

Fig. 40. Outdoor reset configuration.

Modulation Rate

Sensor

Local

P-gain

Gain applied for the P portion of the

PID equation

0-400

I-gain

Gain applied for the I portion of the

PID equation

0-400

D-gain

Gain applied for the D portion of the

PID equation

0-400

Hysteresis step time Time between hysteresis step

changes: 0-600 seconds (0=Disable

hysteresis stepping)

Table 9. Steam Configuration Parameters

Parameter

Comment

Steam enable

Disable/enable steam feature

Steam demand

source

Sensor and LCI

Sensor and Remote Stat

Sensor and Stat Terminal

Sensor Only

Steam pressure

setpoint

Setpoint for normal modulation

Adjustable 0 to 15 or 0 to 150 (sensor

dependant)

Steam time of day

setpoint

Setpoint when TOD switch on

Adjustable 0 to 15 or 0 to 150 (sensor

dependant)

Minimum steam

pressure

Establishes setpoint for the 4ma. input.

Adjustable 0 to 15 or 0 to 150 (sensor

dependant)

Steam pressure off

hysteresis

Differential below setpoint when boiler

is turned off

Adjustable 0 to 15 or 0 to 150 (sensor

dependant)

Table 8. Central Heat Hydronic

Configuration Parameters. (Continued)

Parameter

Comment

Steam pressure on

hysteresis

Differential from setpoint when boiler

is turned on.

Adjustable 0 to 15 or 0 to 150 (sensor

dependant)

Steam hysteresis

step time

Time between hysteresis changes 0 to

600 seconds (0=disable)

Steam P Gain

Gain applied for the P portion of the

PID equation

0-400

Steam I Gain

Gain applied for the I portion of the PID

Equation - 0-400

Steam D Gain

Gain applied for the D portion of the

PID equation

0-400

Steam 4-20 ma

remote control

uses 4-20ma remote control function to

control either the setpoint or

modulation for Steam

Disable, setpoint, modulation

Table 10. Outdoor Reset Configuration Parameters.

Parameter

Comment

Maximum outdoor

temperature