188-0030 | Thermostat, Pneumatic, Unit Mounted, DA/RA, Heat/Cool, Liquid Filled Bulb | Siemens

The Siemens 188-0030 is a reliable, unit-mounted pneumatic thermostat designed for accurate temperature regulation in heating and cooling applications. This direct/reverse-acting (DA/RA) thermostat utilizes a liquid-filled bulb for precise temperature sensing and features a 40 SCIM restrictor for optimal air pressure control. Its adjustable sensitivity and exposed adjustment knob allow for easy customization to meet specific system requirements. The 188-0030 offers a simple, yet effective solution for maintaining consistent temperatures in various HVAC systems. It's a direct replacement for select Honeywell (LP916BXXXX) and Johnson Controls (T-3300-2) models.

Key Features:

• Direct/Reverse Acting (DA/RA) functionality for versatile heating and cooling control.
• Liquid-filled bulb for accurate and responsive temperature sensing.
• 40 SCIM restrictor for precise air pressure regulation.
• Adjustable sensitivity for customized temperature control.
• Exposed adjustment knob for easy setpoint modification.
• Universal mounting bracket for convenient installation.
• Compatible with various HVAC systems.

Specifications:

• Manufacturer: Siemens (Powers Controls)
• Model Number: TH188
• Part Number: 188-0030
• Type: Pneumatic, Unit Mounted
• Control Action: Direct Acting (DA) / Reverse Acting (RA) 
• Application: Heating and Cooling 
• Bulb Type: Liquid-filled, 3/8" diameter x 3-3/4" length 
• Capillary Length: 96"
• Restrictor Size: 40 SCIM (11 ml/s) 
• Setpoint Range: 60-85°F
• Output Air Pressure: 3 to 15 psi (21 to 103 kPa)
• Input (Supply) Air Pressure: Maximum 30 psig (207 kPa)
• Ambient Temperature Range: 45°F to 120°F (4.4°C to 49°C)
• Air Connection: 1/8" NPT

Dimensions: 3 11/32" H x 2 5/32" W x 1 19/32" D (8.5 cm x 5.5 cm x 4.0 cm)