IOMM AGR-1
AGR 070A through 100A
47
Figure 28, Outside Air Reset
LWRB
LWSP
OALL
OAHL
OARB
(OALL=OAHL - OARB)
As the OAT increases above the Outdoor Air Low Limit (OALL), the Actual Leaving Water Setpoint
is decreased from its Leaving High Limit (Leaving Water Setpoint plus Leaving Reset Band) to the
Leaving Water Setpoint. When OAT reaches the OAHL, the Actual Leaving Water Setpoint equals
the Leaving Water Setpoint (AI4). If the OAT sensor is missing or unreliable, no reset occurs and the
Actual Leaving Water Setpoint equals the Leaving Water Setpoint. If the Leaving Water Sensor (AI1)
becomes unreliable, the compressor command is forced to 0%.
Return Water Reset (optional Return Water Sensor is required)
When selected, a Return Water Temperature (RWT) sensor is connected to TB-7 terminals #134 and
#135. Four variables are used to setup the reset ramp that calculates the Actual Leaving Water
Setpoint. These are: Leaving Water Setpoint (AI-4), Reset Band selected with a Zone Terminal,
Return Water High Limit (RWHL), and Return Water Reset Band (RWRB).
Figure 29, Return Water Reset
LWRB
LWSP
RWLL
RWHL
RWRB
(RWLL=RWHL - RWRB)
As the RWT increases above the Return Water Low Limit (RWLL), the controller decreases the
Actual Leaving Water Setpoint from its Leaving High Limit (Leaving Water Setpoint plus Leaving
Reset Band) to the Leaving Water Setpoint. When RWT reaches the RWHL, the Actual Leaving
Water Setpoint equals the Leaving Water Setpoint (AI-4). If the RWT sensor is missing or unreliable,
no reset occurs and the Actual Leaving Water Setpoint equals the Leaving Water Setpoint. If the
Leaving Water Sensor (AI-1) becomes unreliable, the compressor command is forced to 0%.
Содержание AGR 070AS
Страница 20: ...20 AGR 070A through 100A IOMM AGR 1 Figure 9 Typical Field Wiring with Global UNT Controller...
Страница 21: ...IOMM AGR 1 AGR 070A through 100A 21 Figure 10 Typical Field Wiring Diagram with MicroTech Controller...
Страница 22: ...22 AGR 070A through 100A IOMM AGR 1 Figure 11 Standard Single Point Connection with FanTrol...
Страница 23: ...IOMM AGR 1 AGR 070A through 100A 23 Figure 12 Standard Single Point Connection with Optional SpeedTrol...
Страница 24: ...24 AGR 070A through 100A IOMM AGR 1 Figure 13 Unit Control Schematic 2 compressor UNT...
Страница 25: ...IOMM AGR 1 AGR 070A through 100A 25 Figure 14 Staging Schematic 2 compressor 4 stage UNT...
Страница 26: ...26 AGR 070A through 100A IOMM AGR 1 Figure 15 Staging Schematic 2 compressor 6 stage UNT...
Страница 27: ...IOMM AGR 1 AGR 070A through 100A 27 Figure 16 MicroTech Controller Schematic...
Страница 28: ...28 AGR 070A through 100A IOMM AGR 1 Figure 17 Unit Control Schematic MicroTech...
Страница 29: ...IOMM AGR 1 AGR 070A through 100A 29 Figure 18 Staging Schematic 4 stage MicroTech...
Страница 30: ...30 AGR 070A through 100A IOMM AGR 1 Figure 19 Staging Schematic 6 stage MicroTech...
Страница 31: ...IOMM AGR 1 AGR 070A through 100A 31 Figure 20 Unit Control Schematic 2 compressor MicroTech...
Страница 32: ...32 AGR 070A through 100A IOMM AGR 1 Figure 21 UNT Instrument Layout See legend on page 34...
Страница 33: ...IOMM AGR 1 AGR 070A through 100A 33 Figure 22 MicroTech Instrument Layout See legend on page 34...
Страница 35: ...IOMM AGR 1 AGR 070A through 100A 35 Figure 25 MicroTech Sensor Layout...
Страница 99: ...IOMM AGR 1 AGR 070A through 100A 99 Notes...
Страница 100: ...Post Office Box 2510 Staunton Virginia 24402 USA 800 432 1342 www mcquay com...
