Reznor RCB User Manual

Form CP-MAPSIII-D21, Doc No 303070, Page 6
Occupied & Unoccupied
When the unit is called to operate in the auto, heating, or cooling state(s), the unit will
function in one of two modes: occupied or unoccupied. The unit will run in occupied
or unoccupied mode based upon one of the following three user selected commands:
1. Internal Time Clock Schedule Selects Occupied or Unoccupied Mode.
2. Physical input point (ID4) (Contact closed = Occupied)
3. Building Automation network variable (LonWorks
®
or BACnet
®
)
From the display, the user will select the mode control type. All other input methods
are ignored.
Heating Sequence
1. Supply Fan = ON
2. Dampers = Mod
3. Heat = ON/Mod
Discharge Air
Temperature Setpoint
1. Neutral Air =
70°F (21°C)
2. Space Heat =
90°F (32°C)
Manual Heating
State
Mode
Occ or Unocc
Unit OFF
Requires
Reset
Manual Cooling
State
Unit Test
Mode
No Control
All Mechanical
Equipment = OFF
All Outputs OFF
or Zero State
1. Supply Fan(s) =
Intermittent when
th-Tune Device is
enabled.
See Note 1.
2. Dampers = Closed
See Note 2.
Discharge Air
Temperature Setpoint
1. Space Heat =
90°F (32°C)
Cooling Sequence
1. Supply Fan = ON
2. Dampers = Mod
3. Cooling = ON/Mod
4. Dehum = Allowed
Discharge Air
Temperature Setpoint
1. Neutral Air =
70°F (21°C)
2. Space Cool =
55°F (12°C)
Mode
Occ or Unocc
1. Supply Fan(s) =
Intermittent when
th-Tune Device is
enabled. See Note 1.
See Note 2.
2. Dampers = Closed
3. Dehumid = Allowed
1. Space Cool =
55°F (12°C)
Auto Heat / Cool
State
Outside Air
Temp >65°F
(18°C)
Control System Unit State, Mode, Major DAT Septoint
Off / Alarm
State
Unit OFF
State
Heating Sequence
Cooling Sequence
Discharge Air
Temperature Setpoint
No Yes
State
Mode
Function
Unocc ModeOcc Mode
Unocc Mode
Occ Mode
NOTE 1. Intermittent operation of the
supply fan will be based on an
increased space cooling setpoint and
a decreased space heating setpoint
during the unoccupied mode.
NOTE 2. For damper control options
GF1 & GF2 damper operation will be
permitted when the unoccupied
ventilation variable is set to on.
User has
pseudo
manual
control of all
mechanical
operation
Tab:Function
Set Fan
Speeds
2.0 Sequence of Operation (Cont’d)
3.1 Supply Fan
Control
The supply fan provides the total volume of conditioned air to the space at a given rate.
The rate is controlled by unit state, mode, and the selection of one of the six sequences
of operation.
1. High Low Volume Control (Option VFC1)
2. Duct Static Pressure (Option VFC3)
3. Building Static Pressure (Option VFC4)
4. Summer/Winter Constant Volume (Option VFC9)
3.0 Controls
2.2 Modes of
Operation

Reznor RCB Specifications

General

Brand	Reznor
Model	RCB
Category	Air Handlers
Language	English