FHP 641-224 - Page 24

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Figure 15 – Typical water to air application – Discharge Air Control with Modulating Reheat Valves

Main Page

Default Chapter2
- Table of Contents2
The Zone Controller4
Specifications5
Controller Components6
- LED Indicators6
- DIP and Rotary Switches7
- Jumpers and Settings8
Lonworks® Card Option9
Water to Air Operation10
General Description10
Key Features and Benefits10
Inputs11
Outputs11
Control & Status Parameters and Alarms11
- Control11
- Status12
- Alarms12
Sequence of Operation13
Run Conditions13
- Occupied Mode13
- Unoccupied Mode (Night Setback)13
Zone Temperature14
- High Zone Temp14
- Low Zone Temp14
- Zone Sensor Failure14
Zone Setpoint Adjust14
Zone Unoccupied Override14
Freeze Protection15
Fan15
- Constant Volume15
- Vav15
Zone Humidity15
- Hot Gas Re-Heat Valve On/Off15
Modulating Re-Heat Valve16
Filter16
Heating and Cooling - (1 and 2 Compressor Stages)16
- The Heating will be Enabled Whenever17
- The Cooling will be Enabled Whenever17
Reversing Valve17
Supplemental Electric Heating Stage17
Discharge Air Temperature18
- High Discharge Air Temp18
- Low Discharge Air Temp18
- Discharge Air Sensor Failure18
Discharge Air Control18
- Single Outside Air Temperature (OAT) Reset19
- Multiple Outside Air Temperature (OAT) Reset19
Leaving Water Temperature20
- High Leaving Water Temp20
- Low Leaving Water Temp20
- Leaving Water Sensor Failure20
Water to Water Operation27
General Description27
- Inputs27
- Outputs27
Control & Status Parameters and Alarms28
- Status and Control28
- Alarms28
Sequence of Operation29
Run Conditions29
- Occupied Mode29
- Unoccupied Mode (Night Setback)29
- Auto Changeover Mode29
- Digital Input Mode30
- BAS Mode30
Pump Control (Optional)31
- Pump Runtime Alarm31
Lead - Lag Compressor Operation31
- Compressor 1 Runtime31
- Compressor 2 Runtime31
Load Water (Entering) Temperature32
- Load High Temp32
- Load Low Temp32
- Load Sensor Failure32
Source Water (Leaving) Temperature32
- Leaving High Temp32
- Leaving Low Temp32
- Leaving Sensor Failure32
Bacview Termination Detail36
RS-Sensor Termination Detail37

FHP 641-224 - Page 24

Table of Contents