Siemens RAB10 Series, RAB10.1U, RAB10.1UW Technical Instructions

RAB10 Series

Technical Instructions

Two-pipe Fan Coil Room

Thermostat with Manual
Changeover

Document No. 155-524P25

ET RAB-1

March 2, 2007

Description

Features

Application

Product Numbers

Two-wire, gas diaphragm-based fan coil room thermostat with heating or cooling
sequence for two-pi pe fan coil app licat io ns .

• Manual, three-speed fan switch

• Dual setpoint tem peratur e sc ale

• Fan release function

• Two-point control algorithm (On/Off)

• 24 to 120 Vac, 277 Vac operating voltage

• Manual changeover switch

• Two mounting styles: electrical wall box or drywall

• Wall plate adapter (ARG70) included with electrical wall box mount styles

Typically used in commerc ial, high-ris e and light indus t r ial build in gs in conj uncti on w ith:

• Zone valves

• Thermal valves

• Fans

See Table 1.

Technical Design

The RAB10... fan coil room thermostat is based on a two-wire, gas diaphragm
technology.

Operation

Heating Mode
Cooling Mode

When the heating mode is manually selected, and the room temperature falls below the
selected setpoint, the heating contact is closed.

When the cooling mode is manually selected, and the room temperature rises over the
selected setpoint, the cooling contact is closed.

Siemens Industry, Inc.

Technical Instructions RAB10 Series Two-pipe Fan Coil Room Thermostat
Document Number 155-524P25
March 2, 2007

Operation,
Continued

Fan Speed

Fan Release Setting

Ventilation

Changeover

Adjustments

The fan control speed can be controlled two ways:

• Manually, using the three-speed fan switch on the thermostat cover for continuous
operation.

• Automatically, by switching to the selected fan speed using the thermostat for
controlled operation. Prior to commissioning, the jumper position corresponding to
the thermostat function must be selected.

There are two jumper position choices on the printed circuit board:

− Jumper SR1

− Jumper SR2

When the ventilation function is selected (RAB10.1..), the heating and cooling contacts
are always open and the fan works at the selected speed.

The control algorithm can be selected with a switch located on the front of the controller
(change over switch).

The required temperature can be selected by a rotating setpoint adjuster at the front of
the thermostat.

High and low setpoint limit stops can be engaged to limit temperature range.

Mounting Style Product Number Description

(Low), (Medium), (High).

Selected fan speed as continuous operation
Auto Fan is switched at the same time as the valve

Table 1. Product Numbers.

Electrical Wall Box

(with wall box

adapter)

Drywall RAB10.1U 2-pipe; manual changeover; degrees

Accessory

ARG70 Wall Box Adapter

Warning/Caution Notations

WARNING:

CAUTION:

RAB10.1UW 2-pipe; manual changeover; degrees

Fahrenheit and Celsius; fan only
function

Fahrenheit and Celsius; fan only
function

Personal injury, or loss of life may occur if
you do not perform a procedure as
specified.

Equipment damage, or loss of data may
occur if you do not follow a procedure as
specified.

Page 2 Siemens Industry, Inc.

RAB10 Series Two-pipe Fan Coil Room Thermostat Technical Instructions

Operation

Screw terminals for wires of 2 × 16 AWG or 1 × 14 AWG

Material Plastic

Conforms to CE requirements

Document Number 155-524P25
March 2, 2007

Specifications

Operating voltage 24 to 120 Vac, 277 Vac
Frequency 50/60 Hz
Setpoint adjustment range 50°F to 85°F (10°C to 30°C)
Setpoint limit stops Adjustable
Switching differential (SD) ≤1.8°F (1°C), fixed
Switch rating 6A RES, 3.5A FLA, 12A LRA
Switch action Single-Pole, Double-Throw (SPDT )
Selector switch Off/Low/Medium/High
Weight 5 oz. (0.14 kg)
Dimensions 3.80 × 4.45 × 1.68 inches

(96.4 × 113.1 × 42.8 mm)
Color Ivory white with gray selector knobs

Ambient Conditions

Wiring

Housing

Agency Certification

Temperature 32°F to 122°F (0°C to 50°C)
Relative humidity <95%

Transport/Storage

Temperature –4°F to 122°F (–20°C to 50°C)
Relative humidity <95%

Minimum 20 AWG

Enclosure rating NEMA1
Bellows Environmentally-friendly gas

UL listed to 893 (E35918)
cUL listed to Canadian standard
C22.2 No. 24-93

Table 2. Control Valves.

Part Number Description Technical

Instructions

SFA71U 24V NC
SFA11U 120V NC

155-521

SFA208V/25 208V NC
SFA277V/25 277V NC
FTA71 24V NC 155-109
599 Series Zone

Valves

Siemens Industry, Inc. Page 3

Two-way

Three-way

155-320P25