Zone
Zone
Pioneer Gold 1.10 & 2.05 Controller Technical Guide
SEQUENCE OF OPERATIONS
1-27
Thermostat Controlled
Configuration must be set to Thermostat Controlled (T-STAT).
Random Start Delay
The controller will enter a random start delay in these situations:
1.) The unit powers up
2.) Recovery from emergency shutdown alarm
3.) Recovery from high voltage alarm
4.) Recovery from low voltage alarm
5.) Night setback mode is disabled
The Random Start Delay will be between 3 and 60 seconds. The
fan, compressor, and reversing valve will not be operational during
this time. The Random Start Delay will be ignored if the unit is in
test mode.
Occupancy/Supply Fan Operation
Building Occupancy Status
Normal/Occupied Mode
The controller will operate according to the thermostat inputs.
Night Setback Mode
Night Setback Mode is enabled upon receiving a 24VAC or 24VAC
common input to the “NSB” terminal. While in Night Setback Mode,
the controller will ignore all normal thermostat fan and compressor
enable inputs on “G”, “Y1”, and “Y2” terminals. Instead, the
controller will use the “NSB TH” input as the fan and compressor
enabling signal, operating at full “Y2” compressor operation.
The Night Setback Mode can be overridden with a 24VAC input to
the Night Setback override terminal “NSB OVR”. Once the override
signal is received, Night Setback will be overridden for 2 hours, even
if the signal is removed. While Night Setback is overridden, the
controller will respond to the normal thermostat signals.
Supply Fan Operation
The Supply Fan will enable upon receiving a 24VAC input on the
“G” terminal or upon a call for compressor operation, unless an
alarm prevents the fan from operating. Any time the Supply Fan has
a request to start, a 30 second minimum off timer must be satisfied.
The Supply Fan is held on for 15 seconds after the last stage of
cooling, heating, or dehumidification stages off.
Single Speed Permanent-Split Capacitor (PSC) or
Electronically Commutated Motor (ECM)
With a single speed PSC or ECM, the Supply Fan will be enabled
and will always run at full speed when called for (through the “Fan”
Relay Output terminal).
2 Speed Electronically Commutated Motor (ECM)
With a 2 speed ECM, the Supply Fan will have 2 speed operations,—
“low speed” and “high speed”. (Relay output “Fan” will correspond
to “low speed” and “Fan2” will correspond to “high speed”.)
The Supply Fan speeds will correspond to the below listed operating
functions.
•
Supply Fan “G” call only
– Low Speed
•
Single Stage Compressor “Y1”
– High Speed
•
Two Stage Compressor “Y1”
– Low Speed
•
Two Stage Compressor “Y2”
– High Speed
•
Supplemental Heating
– High Speed
•
Dehumidification
– Low Speed
•
Waterside Economizer
– High Speed
CFM Controlled Electronically Commutated Motor
(ECM)
With a CFM controlled ECM, the Supply Fan will modulate to
maintain a target CFM based on the operating functions through a
16-pin connector. (Target CFM settings for cooling, heating, and
dehumidification modes to be selected through the display.)
Thermostat Controlled Random Start, Supply Fan
