
Page 20 of 36 / OM 1169-1
Basic Operation
Setback Feature (Continued)
Step 1.
The setback icon ashes when the unit is turned on under the
setback control.
Cool
Return Setting
Setback
Cool
84F
Setback
Cool
84F
Cool
ReturnSetting
SETBACK
Table 17: Setback features and functions
Property Values Function
Cool Setpoint Range Congurable in 60-90°F
Setpoint cannot be
set out of the range
Heat Setpoint Range Congurable in 60-90°F
Setup Setpoint
Cool setpoint rang max. +2°F
to 95°F
Turn on/off the units
when necessary
Setback Setpoint
40°F to Heat setpoint range
min. -2°F
Schedule
Events (time, on/off, C/H set-
points or setback setpoints)
Alternative of
manual operation
Time clock Day and time 48hr backup
Cool/Heat/Auto Modes
Preparation
Note: For mechanical protection purposes, apply power to
the system units at least six hours before starting the
operation of the system.
Step 1.
Press the Operation mode selector button several times until
the desired mode, Cool, Heat, Fan or Auto mode is selected.
Cool
Return Setting
Set to
Cool
74F
Notes: 1. Unavailable operation modes are not displayed.
2. Before changing the mode,conrmthatthe
display does not indicate master controlled
status. Both heat and cool mode may not be
selected
Step 2.
The setpoint will increase by 1°F (or 1°C) when ▲ button
is pressed and decrease by 1°F (or 1°C) when ▼ button is
pressed.
Note: Setpoint is not available in fan or dry mode.
Cool
Return Setting
Set to
Cool
74F
Step 3.
To change the fan speed, press the Fan speed control button
and select the desired fan speed from Low or High.
Notes: 1. The system may be in automatic fan speed control
for equipment protection purposes.
2. The system may be in automatic fan speed control
according to the room temperature. It is normal for
the fan to intermittently stop operating.
3. It is normal for a delay to occur when changing the
fan speed.
Cool
Return Setting
Set to
Cool
74F
Low High
Characteristics Of Heat Mode
The system automatically controls the following operating
modes to prevent the reduction of heating capacity and space
comfort.
Desuperheater Operation
The optional desuperheater pump will only operate in heat-
ing mode if the unit can provide more capacity than is
required for space heating.
See IOM 1160, “SmartSource Inverter Water Source Heat
Pumps -- Installation & Maintenance Data” for more
information on the Desuperheater option.
Hot Start
When the system goes into heat mode, the WSHP unit fan
will stop in order to prevent a cold draft. (In that case,
“ STANDBY ” (Defrost/Hot start) will be displayed on the
remote controller.)
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