Viega 15118 Product Instructions

Product

Instructions

Viega® Multifunctional Heat/Cool Thermostat

The Viega multifunctional heat/cool thermostat is easy
to install, easy to wire and easy to program. It can be
used for three stages of heating and two stages of
cooling, making it ideal for many applications. Installation
instructions can be found below.

Thermostat applications guide

Description

Gas or Oil Heat Yes

Electric Furnace Yes

Heat Pump (No Aux. or Emergency Heat) Yes

Heat Pump (with Aux. or Emergency Heat) Yes

Multi-stage Systems Yes

Heat Only Systems Yes

Cool Only Systems Ye s

Mounting the subbase

W/E

W2

For vertical mount put one screw top and one screw bottom.
For horizontal mount put one screw left and one screw right.
The thermostat can be mounted directly to the wall or it can
be mounted to a wall box. Use the vertical mounting screw
location to attach to a wall box.

Y2

Part Number 15118

Caution: Electrical Hazard

Failure to disconnect the power before beginning
to install this product can cause electrical shock or
equipment damage.

Mercury Notice:

All of our products are mercury free. However, if the
product you are replacing contains mercury, dispose of it
properly. Your local waste management authority can give
you instructions on recycling and proper disposal.

A trained, experienced technician must install this
product.

damage this product or cause a hazardous condition if
you fail to follow these instructions.

Carefully read these instructions. You could

Viega LLC, 301 N. Main, 9th Floor • Wichita, KS 67202 • Ph: 800-976-9819 • Fax: [phone]

PI-PR 566441 0114 (Multifunctional Thermostat)

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Product

Instructions

Installation tips

Wall locations

The thermostat should be installed approximately 4 to 5 feet above the
oor. Select an area with average temperature and good air circulation.

Do not install thermostat in locations:

• Close to hot or cold air ducts

• That are in direct sunlight

• With an outside wall behind the thermostat

• In areas that do not require conditioning

• Where there are dead spots or drafts (in corners or

behind doors

• Where there might be concealed chimneys or pipes

Viega LLC, 301 N. Main, 9th Floor • Wichita, KS 67202 • Ph: 800-976-9819 • Fax: [phone]

PI-PR 566441 0114 (Multifunctional Thermostat)

NOTE: Pick an installation location that is easy for the
user to access. The temperature of the location should be
representative of the building

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Product

Instructions

Thermostat wiring

1. If you are replacing a thermostat, make note of the
terminal connections on the thermostat that is being
replaced. In some cases the wiring connections will
not be color coded. For example, the green wire
may not be connected to the G terminal.

2. Loosen the terminal block screws. Insert wires then
retighten terminal block screws.

Viega thermostat terminal conversion

Thermostat

15118

RH

C

W/E

Thermostats

15116
15117

RH

C

W

Zone Control

18060
18062
18050

R

C

W

Zone Control

18032

Thermostat

18029

L

N

Power type

• 3 wire

• 3 wire with battery backup

• 2 wire with battery

Wire specifications

Use shielded or non-shielded 18-22 gauge thermostat wire.

Wiring Tips

C terminal

The C (common wire) terminal does not have to be
connected when the thermostat is powered by batteries.

NOTE: In systems with no emergency heat relay a jumper
can be installed between E and W2 to turn thermostat into
a single stage control.

Terminal designations

This thermostat is shipped from the factory to operate a conventional heating and cooling system. See the "heat pump"
conguration step on page 11 of this manual to congure the thermostat for heat pump applications.

2 Heat 2 Cool

Terminal

RC Transformer power

RH Transformer power

C Transformer common Transformer common Transformer common

B Energized in heating Heat pump changeover

O Energized in heating Heat pump changeover

G Fan relay Fan relay Fan relay

W/E First stage of heat Emergency heat relay Emergency heat relay

Y First stage of cool First stage of heat & cool First stage of heat & cool

Y2 Second stage of cool Second stage of cool Second stage of cool &

W2 Second stage of heat Auxiliary heat relay,

Warning:

must conform to Class II circuits per the NEC Code.

Viega LLC, 301 N. Main, 9th Floor • Wichita, KS 67202 • Ph: 800-976-9819 • Fax: [phone]

PI-PR 566441 0114 (Multifunctional Thermostat)

Conventional System

(cooling)

(heating)

All components of the control system and the thermostat installation

2 Heat 2 Cool

Heat Pump System

Transformer power

(cooling)

Transformer power

(heating)

valve energized in cooling

valve energized in cooling

second stage of heat

3 Heat 2 Cool

Heat Pump System

Transformer power

(cooling)

Transformer power

(heating)

Heat pump changeover

valve energized in heating

Heat pump changeover

valve energized in heating

second stage of heat

Auxilary heat relay,

third stage of heat

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Product

Instructions

Typical industry wiring diagrams

AUXILLARY

NOTE: In many systems with no emergency heat relay a jumper can be installed between E and W2

Viega LLC, 301 N. Main, 9th Floor • Wichita, KS 67202 • Ph: 800-976-9819 • Fax: [phone]

PI-PR 566441 0114 (Multifunctional Thermostat)

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Product

Instructions

Viega wiring diagrams

Thermostat -15116

C
O
B

W

120 V AC

Power Supply

L

N

LEGEND: Zone Controls

RH
RC

G
Y

R

C

Viega

Low Voltage
Line Voltage

Thermostat -15117

C
O
B

W

ISOLATED

END

SWITCH

POWER IN

FUSE

(5 AMP MAX)

PUMP

N/O N/CCOM

END

ZONE 4 RELAY

SWITCH

Viega

RH
RC

G
Y

R W CR
ZONE 1

Yellow
Yellow

Red
Red

Thermostat -15118

C
O
B

W/E
W2

W C

ZONE 1

1234

ZONE 2

ZONE CONTROL (18060, 18062)

WITH OPTIONAL PRIORITY

ZONE 2 ZONE 3

1 2 34 1234

Yellow
Yellow

Red
Red

ZONE 3 ZONE 4

RH
RC

G
Y

Y2

W CR WCR

Red

Red
Yellow
Yellow

ZONE 4

ZONE 4 PRIORITY

OFF

ON

Red

Red
Yellow
Yellow

Viega

Thermostat -18050

CC RW NTC A/B

Part Numbers:
15116, 15117 and 15118

1. Connect the "RH" terminal
from the thermostat to "R"
terminal on the zone control

2. Connect the "W" terminal
from the thermostat to "W"
terminal on the zone control,
for part number 15118
connect "W/E" terminal from
the thermostat to "W" terminal
on the zone control

3. Connect the "C" terminal from
the thermostat to the "C"
terminal on the zone control

Viega

Connecting Viega thermostats and zone valves to the Viega zone control

Viega LLC, 301 N. Main, 9th Floor • Wichita, KS 67202 • Ph: 800-976-9819 • Fax: [phone]

PI-PR 566441 0114 (Multifunctional Thermostat)

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