Trane PTAC-SVX01C-EN User Manual

PTAC-SVX01C-EN

21

After the compressor cycles off, it 
will not restart for three minutes. 
This feature prevents the 
compressor from short cycling and 
extends the overall life.

If the room temperature falls to 2.5°F 
below the setpoint temperature or 
the unit compressor fails, the reverse 
cycle heat is shut off and the electric 
heat is turned on.

When the unit senses room 
temperatures of 40°F or below, the 
unit activates the indoor fan motor 
and either the electric resistance 
heater or the hydronic heater to help 
prevent pipes or fixtures from 
freezing. 

This also overrides the Energy 
Management System input for unit 
mounted or wall mounted display 
modules

This function allows random restart 
of the PTAC units in the event of a 
power outage. The restart delay 
reduces the initial inrush current 
from the building to help prevent a 
second power outage caused by too 
much current draw. 

The random restart function will 
occur after every power up cycle by 
delaying the operation of the unit for 
0 to 90 seconds. Compressor 
minimum off time is enforced after 
the random restart function has 
completed.

The PTAC can accommodate a field-
installed door switch and occupancy 
sensor to operate the energy 
management feature. 

Each unit can be operated from any 
standard 4 or 5-wire, remote-
mounted thermostat. Also, the unit 
has a built-in low voltage power 
source that can accommodate either 
a manual, auto changeover, or 
programmable thermostat. 

The setpoint limiting feature reduces 
energy costs by controlling the 
maximum setpoint in heating and 
the minimum setpoint in cooling.

PTACs have an active defrost system 
that removes ice build-up on the 
outdoor coil, which may occur 
during the heat pump cycle. 

The GL, GH, O, W, Y, R, and C 
terminals provide control inputs for a 
remote wall-mounted thermostat.

The terminals listed control the 
operation of the unit when no 
display module is used. A display 
module will take precedence over 
any of these inputs.

OFF - cooling and heating functions 
stop.

HEAT - room temperature is 
maintained by cycling in heat pump 
mode or electric heat. The model 
PTHE switches from heat pump 
mode to electric heat when the 
outdoor air temperature is below 
20°F (approximately), or when the 
heat pump cannot keep up with the 
heating load when using a two-stage 
thermostat.

COOL - room temperature is 
maintained by cycling the air 
conditioner.

FAN - the fan runs at the user 
selected speed or runs as otherwise 
configured.

The fan speed may be user selected 
as either high or low. Fan cycling 
versus continuous is operation 
configurable. See section on 
configuration for details.

The energy management input is 
used to move the setpoint up in the 
case of cooling and down in the case 
of heating.  This conserves energy 
by reducing the demand in the 
space.

The energy management input is a 
dry contact closure; typically this is 
driven from either a occupancy 
sensor or a front desk  control 
system. 

Fan

Mode