Light Commercial VAV stand-alone operation

Unit stand-alone operation.

If you use a
mechanical zone sensor the cooling setpoint will actually be the discharge air
setpoint (RTRM J6-5 will be ignored)

You need to
jump RTRM J6-2 & 4 or use a 7.68k resistor across J6-2 & 4  because a VAV has
only two modes (On or AUTO)

The VHR
output should be wired to drive VAV boxes to maximum position during all heating
modes and unoccupied periods.

1. Only RTRM terminals J6-2 & 4 jumped.
   1. Occupied Cooling with Indoor Blower ON. (Set the supply air cooling
      setpoint on the RTAM)
2. Jumper between RTRM terminals J6-2 & J6- 4, zone
   sensor between RTRM J6-1 & 2 and a field supplied occupied/unoccupied switching
   device between RTRM J6-11 & 12.
   1. RTRM J6-2 & 4 jumped, RTRM J6-11 & 12 open - Occupied Cooling, Morning Warm-up, Daytime Warm-up,
      Indoor Blower ON
      • The unit can do
        Morning Warm-up if it knows the zone temp, and switches from unoccupied to
        occupied.
      • If the power is cycled the
        unit can enter Morning Warm-up.
      • With DWU enabled (RTAM Dip switch 5 on) the zone
        temperature will be controlled at
        3°F below the Morning Warm-up setpoint
   2. RTRM J6-2 & 4 jumped, RTRM J6-11 & 12 jumped - Unoccupied Heating,Indoor Blower AUTO
      • With DWU enabled (RTAM Dip switch 5 on) the zone temperature will be controlled at
        10°F below the Morning Warm-up setpoint, but not less than 50°F
      • With the RTRM J6-11 & 12 contacts closed, the
        economizer is forced fully closed, the mechanical cooling will be disabled and the
        indoor blower will go to AUTO.
   3.  

WARNING:

Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.