Bryant F Bedienungsanleitung PDF herunterladen (Seite 71)

Indoor Air Quality

If the optional indoor air quality sensor is installed, the

RTU --MP will maintain indoor air quality within the space

at the user configured differential setpoint. The setpoint is

the difference between the indoor air quality and an

optional outdoor air quality sensor. If t he outdoor air

quality is not present then a fixed value of 400ppm is

used. The following conditions must be true in order for

this algorithm to run:

S The mode is occupied.

S Indoor Fan has been ON for at least 30 seconds.

S Indoor Air Quality sensor has a valid reading

As air quality within the space changes, the minimum

position of the economizer damper will be changed thus

allowing more or less outdoor air int o the spac e depe nding

on the relationship of the indoor air quality to the

differential setpoint. If all the above conditions are t rue,

the IAQ algorithm will run and calculates an IAQ

minimum position value using a PID loop. The IAQ

minimum damper position is then compared against the

user configured economizer minimum position and the

greatest value becomes the final minimum damper

position of the economizer output.

If the calculated IAQ minimum position is greater than

the IAQ maximum damper position configuration then it

will be clamped to the configured value.

Demand

Limit

If the RTU --MP receives a level 1 (one degree offset), 2

(two degree offset), or a 3 (4 degree offset) to the BACnet

demand limit variable, the controller will expand the

heat ing and cooling setpoints by the configured dem and

limit setpoint value and remain in effect until the BACnet

demand limit variable receives a 0 value.

FASTENER TORQUE VALUES

See Table 25 for torque values.

Table 25 – Torque Values

Supply fan motor mounting

120 ¦ 12 in ---lbs 13.5 ¦ 1.4 Nm

Supply fan motor adjustment plate

120 ¦ 12 in ---lbs 13.5 ¦ 1.4 Nm

Motor pulley setscrew

72 ¦ 5 i n --- l b s 8.1 ¦ 0.6 Nm

Fan pulley setscrew

72 ¦ 5 i n --- l b s 8.1 ¦ 0.6 Nm

Blower wheel hub setscrew

72 ¦ 5 i n --- l b s 8.1 ¦ 0.6 Nm

Bearing locking collar setscrew 65 to 70 in ---lbs 7.3 to 7.9 Nm

Compressor mounting bolts 65 to 75 in---lbs 7.3 to 7.9 Nm

Condenser fan motor mounting bolts

20 ¦ 2 i n --- l b s 2.3 ¦ 0.2 Nm

Condense r fan hub setscrew

84 ¦ 1 2 i n --- l b s 9.5 ¦ 1.4 Nm

580J

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 84 85

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