Siemens Building Technology 188-0031 Stat
The Siemens 188-0031 (Model TH 188D) is a professional-grade unit mount pneumatic thermostat designed for precision control in fan coil units and unit ventilators. As a direct acting (DA) instrument, it employs a liquid-filled sensing element and a remote bulb to provide gradual acting control of heating or cooling mediums. Operating on a force balance principle, this thermostat ensures high linearity and rapid response to temperature fluctuations within a 60°F to 85°F setpoint range. For contractors managing complex terminal unit applications, the 188-0031 is a reliable pneumatic temperature controller that features an internal 40 scim restrictor and adjustable sensitivity to fine-tune system performance. Its rugged zinc alloy and aluminum housing and universal mounting bracket simplify installation in high-traffic commercial environments where wall-mounted sensors are impractical.
Key Benefits- Precise Remote Sensing: Utilizes a 3/8" diameter liquid-filled bulb with a 48" capillary for accurate return air stream monitoring.
- Optimized Air Consumption: Features an integrated 40 scim restrictor (11 ml/s) for efficient air usage at a 25 psi nominal supply pressure.
- Compact Installation: Designed specifically for unit mounting with an exposed adjustment knob for easy technician access.
- HVAC System Compatibility: Serves as a direct functional replacement for legacy Honeywell LP916B and Johnson Controls T-3300-2 series.
- Linear Performance: Internal pneumatic feedback mechanism ensures consistent output pressure between 3 and 15 psi.
Is the Siemens 188-0031 compatible with unit ventilators using a Limitem?
Yes. In unit ventilator applications where the thermostat pilots a Limitem, the 40 scim restrictor in the 188-0031 is required because the Limitem utilizes a built-in bleed. To ensure stable control, ensure the remote bulb is positioned in a continuous airflow path.
How do you calibrate the TH 188D in the field?
Technicians should set the main air supply to 25 psi. With the setpoint knob matched to the actual bulb temperature, the output pressure should measure between 7 and 8 psi. Adjust the setpoint post if necessary to reach this calibration pressure before locking the knob.
What is the difference between this model and the 188-0030?
The 188-0031 is a single-action direct-acting (DA) model typically used for heating. The 188-0030 is a dual-action heating/cooling (HC) model that switches between direct acting (heating) and reverse acting (cooling).
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $288.27
-65%$288.27
$100.89Siemens Building Technology 188-0031 Stat
The Siemens 188-0031 (Model TH 188D) is a professional-grade unit mount pneumatic thermostat designed for precision control in fan coil units and unit ventilators. As a direct acting (DA) instrument, it employs a liquid-filled sensing element and a remote bulb to provide gradual acting control of heating or cooling mediums. Operating on a force balance principle, this thermostat ensures high linearity and rapid response to temperature fluctuations within a 60°F to 85°F setpoint range. For contractors managing complex terminal unit applications, the 188-0031 is a reliable pneumatic temperature controller that features an internal 40 scim restrictor and adjustable sensitivity to fine-tune system performance. Its rugged zinc alloy and aluminum housing and universal mounting bracket simplify installation in high-traffic commercial environments where wall-mounted sensors are impractical.
Key Benefits- Precise Remote Sensing: Utilizes a 3/8" diameter liquid-filled bulb with a 48" capillary for accurate return air stream monitoring.
- Optimized Air Consumption: Features an integrated 40 scim restrictor (11 ml/s) for efficient air usage at a 25 psi nominal supply pressure.
- Compact Installation: Designed specifically for unit mounting with an exposed adjustment knob for easy technician access.
- HVAC System Compatibility: Serves as a direct functional replacement for legacy Honeywell LP916B and Johnson Controls T-3300-2 series.
- Linear Performance: Internal pneumatic feedback mechanism ensures consistent output pressure between 3 and 15 psi.
Is the Siemens 188-0031 compatible with unit ventilators using a Limitem?
Yes. In unit ventilator applications where the thermostat pilots a Limitem, the 40 scim restrictor in the 188-0031 is required because the Limitem utilizes a built-in bleed. To ensure stable control, ensure the remote bulb is positioned in a continuous airflow path.
How do you calibrate the TH 188D in the field?
Technicians should set the main air supply to 25 psi. With the setpoint knob matched to the actual bulb temperature, the output pressure should measure between 7 and 8 psi. Adjust the setpoint post if necessary to reach this calibration pressure before locking the knob.
What is the difference between this model and the 188-0030?
The 188-0031 is a single-action direct-acting (DA) model typically used for heating. The 188-0030 is a dual-action heating/cooling (HC) model that switches between direct acting (heating) and reverse acting (cooling).
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Siemens 188-0031 (Model TH 188D) is a professional-grade unit mount pneumatic thermostat designed for precision control in fan coil units and unit ventilators. As a direct acting (DA) instrument, it employs a liquid-filled sensing element and a remote bulb to provide gradual acting control of heating or cooling mediums. Operating on a force balance principle, this thermostat ensures high linearity and rapid response to temperature fluctuations within a 60°F to 85°F setpoint range. For contractors managing complex terminal unit applications, the 188-0031 is a reliable pneumatic temperature controller that features an internal 40 scim restrictor and adjustable sensitivity to fine-tune system performance. Its rugged zinc alloy and aluminum housing and universal mounting bracket simplify installation in high-traffic commercial environments where wall-mounted sensors are impractical.
Key Benefits- Precise Remote Sensing: Utilizes a 3/8" diameter liquid-filled bulb with a 48" capillary for accurate return air stream monitoring.
- Optimized Air Consumption: Features an integrated 40 scim restrictor (11 ml/s) for efficient air usage at a 25 psi nominal supply pressure.
- Compact Installation: Designed specifically for unit mounting with an exposed adjustment knob for easy technician access.
- HVAC System Compatibility: Serves as a direct functional replacement for legacy Honeywell LP916B and Johnson Controls T-3300-2 series.
- Linear Performance: Internal pneumatic feedback mechanism ensures consistent output pressure between 3 and 15 psi.
Is the Siemens 188-0031 compatible with unit ventilators using a Limitem?
Yes. In unit ventilator applications where the thermostat pilots a Limitem, the 40 scim restrictor in the 188-0031 is required because the Limitem utilizes a built-in bleed. To ensure stable control, ensure the remote bulb is positioned in a continuous airflow path.
How do you calibrate the TH 188D in the field?
Technicians should set the main air supply to 25 psi. With the setpoint knob matched to the actual bulb temperature, the output pressure should measure between 7 and 8 psi. Adjust the setpoint post if necessary to reach this calibration pressure before locking the knob.
What is the difference between this model and the 188-0030?
The 188-0031 is a single-action direct-acting (DA) model typically used for heating. The 188-0030 is a dual-action heating/cooling (HC) model that switches between direct acting (heating) and reverse acting (cooling).
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
