Siemens Building Technologies 186 Series Hygrostats Catalog Page

Pneumatics

Pneumatic Room and Duct Hygrostats

186 Series

Hygrostats

Description

The 186 Room and Duct Hygrostats are pneumatic
instruments sensitive to slight changes in relative humidity.

Features

• Adjustable sensitivity

• Sensitive hygroscopic membrane

• Includes temperature compensation

• Galvanized steel housing standard on duct model

• Models available for normal comfort range and high
limit range

• Room type comes complete with standard cover and
wall plate

• Duct type comes mounted inside a duct mounting box

186 Room Hygrostat.

186 Duct Hygrostat.

Applications

The 186 Room and Duct Hygrostats provide control of
relative humidity for comfort control in hospitals, schools

and ofce buildings.

Application Drawings

Room Application.

F-35

Duct Application.

Pneumatics

Pneumatic Room and Duct Hygrostats Specifications

F-36

Sensitivity ......................................................................1/4 to 4 psi/% RH

Normal Supply Pressure .................... 15 to 25 psi (103 kPa to 172 kPa)

Maximum Supply Pressure ............................................30 psi (207 mm)

Air Consumption ............................................................ 15 scim (4 ml/s)

Effect of 10°F Temperature Change ................................Shift of 1% RH

Effect of 5 psi Supply Pressure

Change (mid sensitivity) ................................................ 7.0 min./vol unit

Duct Box ................................................... Extends 6" (152 mm) into duct

Air Connections

Duct .......................................................... Barb tting for 1/4" (64 mm)

OD polyethylene tubing

Room ........................................... 5/32" (4 mm) OD polyethylene tubing

Dimensions

Chassis......................................................... 2.9" H x 1.75" W x 1.13" D

(73.66 mm W x 44.45 mm H x 28.70 mm D)

Room .......................................................................... 2.16" W x 3.34" H

(55 mm W x 85 mm H)

Duct ................................................................. 4.5" W x 5.88" H x 6" D

(114 mm x W 149 mm H x 152 mm D)

Standard Room Cover .............................................Desert Beige, plastic

Shipping Weights

186-0013 & 186-0019.................................................. 0.84 lb. (0.38 kg)

186-0087; 186-0088; 186-0090; 186-0091 ......................3.3 lb. (1.5 kg)

Pneumatic Room and Duct Hygrostats Product Ordering

Part No.

Direct

Description Control Range Type of Control

Room 20 to 90% RH Humidication/Dehumidication 186-0013 186-0019

Duct 20 to 90% RH Humidication/Dehumidication 186-0087 186-0088

Duct 55 to 95% RH High Limit — 186-0090

Duct 25 to 65% RH Room Comfort — 186-0091

Control Action

Reverse

Control Action

Accessories & Service Kits

F-87