VAV HEATING
Field Wiring
For Unoccupied heating operation connect zone sensor
wiring to terminals 13 and 14 of terminal block CTB1
located inside the control panel (
see Appendix 1).
Miscellaneous Connections
All units provided with a VFD include a factory mount-
ed static pressure sensor (SPS1). The unit can also
have an optional second static pressure sensor, (SPS2).
The second static pressure transducer would be used
if the main supply duct split into two main branches.
The control can be programmed to maintain the low-
est input, highest input or the average of the two. The
sensor is factory wired and requires field installation
of 1/4” ID sensor tubing to the selected duct location.
A field supplied static pressure probe and tubing must
be installed in the field prior to unit start-up.
Refer to the unit IOM Form 145.05-NOM3 for details
on how to install the static pressure probe and tubing.
Programming
Options Key – Heating Subsection
• HEATING SYS TYPE = NONE, ELECTRIC,
HOT WATER/STEAM.
• ELEC HEAT CAPACITY = 11 KW, 17 KW, 34
KW, 68 KW.
Setpoints Key – Heating Subsection
• HEATING SAT = 80.0 – 115.0
0
F.
• UNOCC ZONE HEATING SETPOINT = 45.0 –
99.0
0
F.
• HEAT LIMIT TEMPERATURE = 100.0 – 150.0
0
F.
• RAT HEATING SETPOINT = 55.5
0
F – RAT
COOLING SETPOINT -2
0
F.
Program Key - Heating Subsection
• HEATING SYSTEM = USER ENABLED.
• NIGHT SET BACK = USER ENABLED, USER
DISABLED.
• HW VALVE ACTION = DIRECT, REVERSE.
Only used with Hot Water and Steam
Heat options.
FORM 145.05-SU3 (611)
ISSUE DATE 6/01/2011
JOHNSON CONTROLS
15
SECTION 4 - VAV UNITS