User Guide

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AMX Corporation reserves the right to alter specifications without notice at any time.

For full warranty information, refer to the AMX Instruction Manual(s) associated with your Product(s).

3000 RESEARCH DRIVE, RICHARDSON, TX 75082 • 800.222.0913 • 469.624.7153 • fax 469.624.7153 • technical support 800.932.6993 • www.amx.com

93-0944

REV: C

Setting the DIP Switch

Set the DIP switch located on the thermostat circuit board (FIG. 4) according to the

application needs (see the DIP Switch Settings table below for details).

The following table shows what each switch corresponds to depending on position.

Switch one should be set in the “OFF Servant” position unless you plan to broadcast

readings from remote temperature sensors to other thermostats in the system when

there is no control system in place.

Attaching the MiniVerter

Before mounting the VST, you must attach the MiniVerter to the rear panel:

1. Detach the faceplate from the base of the VST (FIG. 1).

2. Pull the stripped/tinned wires through the cutout in the center of the base.

3. Connect the communications wiring:

a. Blue to B-

b. Orange to B+

c. Red/White to A-

d. Black/White to A+

4. Connect the power wiring (FIG. 5):

a. Connect Black (common) from the HVAC system to C on the VST

Communication terminal.

b. Connect Red (24 VAC power) from the HVAC system to R on the VST

Communication terminal.

5. Jumper RH to RC (FIG. 5):.

6. Insert the MiniVerter (connector-side first) into the guide-slots located on the

bottom of the MiniVerter mounting bracket (FIG. 6).

7. Slide the MiniVerter back into its locking position in the mounting bracket

(FIG. 6).

8. With the connector-side of the MiniVerter seated in the guide-slots, gently

press the opposite side of the MiniVerter in and down, to snap it into its locked

position on the mounting bracket.

Connecting the ViewStat to the HVAC System

Warning!

• 120 volts may cause serious injury from electrical shock. Disconnect electrical

power to the HVAC system before starting installation. This system is a low-

voltage system.

• Improper installation may cause serious injury from electrical shock. This sys-

tem must be installed by a qualified contractor in accordance with NEC Stan-

dards and applicable local and state codes.

For HVAC system wiring diagrams (for Single-Stage Furnace and AC, Two-Stage

Furnace and Two-Stage AC, Roof-Top Unit (Two-Stage Heat and Two-Stage Cool),

Boiler With AC (Two Transformers), and Single Stage Heat Pump Configurations,

refer to the Wiring Diagrams section in the ViewStat Communicating Thermostat

Installation Instructions document (included).

Maximum Cable Distances

Additional Information

Refer to the ViewStat Communicating Thermostat Instruction Manual (available

online at www.amx.com) for additional information and details on the VST and

related devices, including:

• Product Specifications for the VST and Support Modules

• Configuration, installation and wiring of the VST, Support Modules and Remote

Temperature Sensors.

• Programming and operation instructions.

• HVAC system wiring diagrams.

FIG. 3 Installing the 24 VAC Suppression Ferrite

FIG. 4 Setting the DIP Switch

DIP Switch Settings

Application

Switch

Single Stage Furnace & AC Servant Fossil Single H/C

Two Stage Furnace & Two Stage AC Servant Fossil Multi H/C

Roof Top Unit (Two Stage Heat & Two Stage

Cool)

Servant Fossil Multi H/C

Boiler with AC (Two Transformers) Servant Fossil Single H/C

Single Stage Heat Pump Servant Electric Single HT. Pump

Two Multi-stage Heat Pump Servant Electric Multi HT. Pump

First Stage Radiant Floor Heat, Second

Stage Furnace One Stage of Cooling

Servant Fossil Multi H/C

1. Pass the 24VAC power

cord through the ferrite

2. Loop the cable around

and pass it through the

ferrite bead again.

3. Gently pull the cable

to eliminate excess

bead.

slack.

OFF

SERVANT

MASTER

ELECTRIC

FOSSIL

SINGLE

MULTI

HT.PUMP

H/C

FIG. 5 ViewStat base with Communication, Power and Equipment terminals

FIG. 6 Inserting the MiniVerter into the mounting bracket (top view).

Maximum Cable Distances

Between the VST and NetLinx or LandMark Controller: 1000’ (304.8m)

Between support module and VST: 1000’ (304.8m)

Max. cumulative cable length between multiple support modules and VST: 1000’ (304.8m)

Between support module and remote sensor: 300’ (91.44m)

Common (black) from

24 VAC HVAC System

Power (red)

from 24 VAC

HVAC System

from

MiniVerter

cutout

jumper from RC to RH

Insert the MiniVerter

(connector-side down)

into the guide slots

inside the mounting

Slide the MiniVerter into locking

position in the bracket.

Snap into place

ViewStat base (top view)

MiniVerter

bracket.

mounting

bracket