Johnson Controls 100 Series User Manual

JOHNSON CONTROLS
64
FORM 100.50-NOM12
ISSUE DATE: 04/02/2019
SECTION 5 – SEQUENCE OF OPERATION
Continuous Ventilation
• User adjustable program that allows the supply
fan to run continuously when in Occ mode.
• It can be found under PROGRAM-VENTILA-
TION menu.
• When continuous ventilation is User Enabled, the
supply fan is ON whenever the unit is in an Occ
mode.
• When continuous ventilation is User Disabled, the
supply fan is started with a demand for cooling or
heating. The APS must be closed before cooling or
heating operation is permitted.
Supply Fan Modulation
• When the Series 100 unit is in Occ Standby
(continuous ventilation is User Enabled) or Occ/
Unocc Cooling Low, the supply fan is running at
the SZVAV minimum speed.
• If the current zone temperature rises 1.5°F above
the active zone temperature setpoint, the IPU
board starts to increase the supply fan speed.
• The supply fan speed keeps increasing as the zone
temperature rises higher above the active zone
temperature setpoint.
• When the zone temperature is above the active
zone temperature setpoint by 2.5°F, the supply fan
is at full speed (100%).
Cooling And Heating Operation
• On a SZVAV unit, cooling and heating demands is
determined in one of two ways:
1. Zone temperature
a. Wired zone temperature
b. Communicated zone temperature
2. Staged input
a. Thermostat (2 stage cooling/heating)
b. BAS commands
• The zone control method must be selected under
the PROGRAM-UNIT DATA menu:
1. Wired Zone Temperature: Hardwired sensor
to CTB1, 10K Type III thermistor
2. Comm Zone Temperature: Zone temperature
signal from a BAS (BACnet MS/TP point
AV40 ZONE_TEMP_BAS)
3. Staged: Either a thermostat is connected to the
appropriate terminals on CTB1 or BAS com-
mands are used for Y1, Y2, W1, W2, and G
terminals
• The occ/unocc cooling setpoints can be viewed un-
der the SETPOINTS-COOLING menu.
• The "OCC/UNOCC HEATING" SPs can be viewed
under the SETPOINTS-HEATING menu.
• These setpoints are also available on a BAS.
• Table 22 on page 65 shows the relationship be-
tween zone temperature and unit modes.
SZVAV Supply Air Temperature (SAT)
• Once a SZVAV congured unit enters an Active
Cooling or Heating mode, the IPU board utilizes
as many stages of cooling or heating as needed to
achieve and maintain the "ACTIVE SAT" setpoint.
• This includes economizer operation if outside air
conditions are suitable.
• "1ST AND 2ND STAGE COOLING" SPs can be
found under the SETPOINTS-COOLING menu.
• "1ST AND 2ND STAGE HEATING" SPs can be
found under the SETPOINTS-HEATING menu.
• These SPs are also available on a BAS.
• Table 23 on page 66 shows the active S AT set-
points for each unit mode in SZVAV.

Johnson Controls 100 Series Specifications

General

Brand	Johnson Controls
Model	100 Series
Category	Air Conditioner
Language	English