Standalone HVAC Room Energy Sensor
G
G
G
G
ESA
ESA
ESA
ESA
Jumper Setting
1. Low temperature limit
This jumper allows the selection of 3 different low temperature limits in which the GH-MS1 master sensor will
automatically operate the HVAC when room temperature is lower than the set value. The sensor detects the room
temperature once every 5 minutes. To disable the low temperature limit, remove the jumper. This function will only
operate when room is unoccupied.
2. High temperature limit
This jumper allows the selection of 3 different temperature limits in which the GH-MS1 master sensor will
automatically operate the HVAC when room temperature is higher than the set value. The sensor detects the room
temperature once every 5 minutes. To disable the high temperature limit, remove the jumper. This function will only
operate when room is unoccupied.
3. Relay output format
This jumper allows the selection of relay output format. Place the jumper on both pins will make the relay contact
with 24V power. If dry contact (no load) output is required, remove the jumper off the pins (disconnect the pins).
4. Restart delay enable/disable
This jumper allows to enable/disable the 2-minute short start cycle protection. With this restart delay enabled, the
HVAC will start operating after 2 minutes. This restart delay is generally required by the individual Packaged
Terminal Air Conditioner (PTAC) unit to protect the compressor damaging from frequent activations. To disable
short start protection, place the jumper at disable position.
5. Test/normal
This jumper allows to enable/disable the LED and buzzer indication. When jumper is placed at “TEST” position, the
LED will light for approximately 2 seconds whenever the motion is detected and the buzzer will beep. If jumper is
placed at “NORMAL” position, the LED will NOT light when sensor detects the motion. But it will blink about 10
seconds after the GH-MS1 activate the HVAC. This indication will help the maintenance staff to check if the GH-
MS1 system is working normal.
GH-MS1 Master Sensor Description