Part
1. Overview
14
Design Guide
DCM014A51
3. iTM Overview
3.1 Indoor Unit Management Point
1. The
iTM
manages the indoor unit groups as an Indoor Unit Management Point only when a
group address is assigned (see 2.3 Remote Controller Group and Group Address) to an indoor
unit(s).
One (1) indoor unit management point consists of the following on the
iTM
:
Function
Monitor
Control
On/Off
X
X
Operation Mode
X
X
Occ Cooling/Heating Setpoint
X
X
Unocc Cool/Heat Setpoint
X
X
Fan Speed
X
X
Vane Position
X
X
Remote Controller Prohibit (On/Off, Mode, Setpoint)
X
Room Temperature
X
Setpoint Range Limitation (Cool/Heat Min/Max)
X
Error Status
X
Malfunction Code
X
Override Timer
X
Setpoint Tracking
X
Minimum Setpoint Differential
X
2. Setpoints
a. Independent cool and heat dual setpoints in the occupied period. Single setpoint mode is
available with 0
o
F min setpoint differential and setpoint tracking enabled.
b. Occupied setpoint range for cooling and heating are configurable by Setpoint Range
Limitation within 60
o
F – 90
o
F as a default. The cooling setpoint cannot be set lower than the
heating setpoint and the heating setpoint cannot be set higher than the cooling setpoint.
c. Minimum Cool/Heat Setpoint Differential refers to the difference between the cooling and
heating setpoint values. The differential can be set between 0
o
F – 7
o
F.
d. Setpoint tracking is used to lock in the Min. Setpoint Differential for cooling and heating to a
fixed value.
e. The setback setpoints (cooling and heating) in the unoccupied period are adjustable
between 50
o
F – 95
o
F.
f. The setback setpoints can only be set outside of the occupied setpoint range with a 2
o
F
differential. The setback (unoccupied) setpoint will reduce the occupied setpoint range
automatically to maintain a 2
o
F fixed differential from the highest (cooling) and lowest
(heating) possible occupied setpoints.