Viega 15116 User manual

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User Guide
Viega Non-Programmable
Heat/Cool Thermostat
UG-HC 566439 1219 Nonprogrammable Thermostat
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.
Part Number 15116
Viega products are designed to be
installed by licensed and trained
plumbing, mechanical, and electrical
professionals who are familiar with Viega
products and their installation.
Installation by non-professionals may
void Viega LLC’s warranty.
This document is subject to updates.
For the most current Viega technical
literature please visit www.viega.us.
Pick an installation location that is
easy for the user to access. The
temperature of the location should be
representative of the building
Installation Tips
Applications Guide
The Programmable Heat/Cool Thermostat can
be use for the following applications:
■ Gas or Oil Heat
■ Electric Furnace
■ Heat Pump (No Aux. or Emergency Heat)
■ Heat Only Systems
■ Cool Only Systems
The following applications are not recommended:
■ Heat Pump (with Aux. or Emergency Heat)
■ Multi-stage Systems
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 heating/cooling emitters
■ 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
CAUTION! Electrical Hazard
Failure to disconnect the power
before beginning to install this
product can cause electrical shock or
equipment damage.
No
No
No Yes

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
W
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.
Mounting the Subbase Attaching the Thermostat to
the Subbase
Align the 4 tabs on the subbase with
corresponding slots on the back of the
thermostat, then push gently until the
thermostat snaps in place.
To insure a solid 󶈵t between the thermostat
and the subbase:
■ Mount subbase to a 󶈶at wall or electrical box.
■ Use screws provided.
■ Drywall anchors should be 󶈶ush with the wall.
■ Wires should be pushed into the wall.
A trained, experienced technician must
install this product. Carefully read these
instructions. You could damage this
product or cause a hazardous condition if you
fail to follow these instructions.

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Battery Installation
Battery installation is recommended even if
thermostat is hardwired (C terminal connected).
When thermostat is hardwired and batteries
are installed, the thermostat will activate a
compressor delay of 5 minutes when the
thermostat detects a power outage from the
hardwired power supply.
Insert 2 AA Alkaline batteries
(included). High quality alkaline
batteries are recommended.
Simple operating instructions are found on the
back of the battery door.
Important:
High quality alkaline batteries are
recommended. Rechargeable batteries
or low quality batteries do not guarantee a
1-year life span.
Thermostat Settings
Gas or Electric Setup
Gas
For systems that control the fan during a call for
heat, put the fan operation switch to the GAS
position.
Electric
With the fan operation switch in the ELEC
position, and the fan relay connected to the G
terminal - the thermostat will control the fan
during a call for heat.
Fan Operation Switch

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Thermostat Wiring
■ 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.
■ Loosen the terminal block screws. Insert
wires then retighten terminal block screws.
WARNING!
All components of the control system
and the thermostat installation must
conform to Class II circuits per the NEC Code.
CAUTION!
Electrical hazard. Failure to disconnect
the power before beginning to install
this product can cause electrical shock or
equipment damage.
Terminal Designations
■ W Heat relay
■ Y Compressor relay
■ G Fan relay
■ O Heat pump changeover valve energized
in cooling
■ RC Transformer power for cooling
■ RH Transformer power for heating
■ B Heat pump changeover valve energized
in heating
■ C Common wire from secondary side of
cooling system transformer
Viega Thermostat Terminal
Conversion
C
W
C
W/E
L
N
R
C
W
RH
RC
RH
RC
Thermostats
15116
15117
Thermostat
15118
Zone Controls
18060
18062
Digital Thermostat
18050
Zone Control
18032
Thermostat
18029
Power Type
■ 3 wire
■ 3 wire with battery backup
■ 2 wire with battery
Wiring Tips
RH & RC terminals
For single transformer systems, leave the jumper
wire in place between RH and RC. Remove
jumper wire for two transformer systems.
Heat Pump Systems with No
Auxiliary or Emergency Heat
If wiring to a heat pump, use a small piece of
wire (not supplied) to connect terminals W and Y.
C Terminal
The C (common wire) terminal does not have to
be connected when the thermostat is powered
by batteries.
Wire Specifications
Use shielded or non-shielded 18-22 gauge
thermostat wire.

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Typical Industry Wiring Diagrams
Typical 1H/1C System: 1 Transformer Typical Heat-Only System
Power supply
Factory-installed jumper. Remove only
when installing on 2-transformer systems
Use either O or B terminals for changeover
valve
Use a small piece of wire (not supplied) to
connect W and Y terminals
Set fan operation setting to Electric
Optional 24 VAC common connection when
thermostat is used in battery power mode
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Typical 1H/1C System: 2 Transformer Typical Heat Only System With Fan
Typical Cool-Only System
Compressor
Relay
Heat Relay
Fan Relay
(HOT)
Compressor
Relay
Heat Relay
Remove
Jumper
Fan Relay
(HOT)
(HOT)
(HOT)
(HOT)
(HOT)
Heat Relay
Heat Relay
Fan Relay
Fan Relay
Compressor
Relay
Compressor Relay
Heat Change
Over Valve
Cool Change
Over Valve
Fan Relay
(HOT)
Typical 1H/1C Heat Pump System

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Viega Wiring Diagrams
Connecting Viega Thermostats and Zone Valves to the Viega Zone Control
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Viega
Legend: Thermostat
Low Voltage
Line Voltage
Part Numbers: 15116, 15117, and 15118
■ Connect the RC terminal from the
thermostat to R terminal on the zone
control.
■ 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.
■ Connect the C terminal from the
thermostat to the C terminal on the
zone control.
Zone Control (18060, 18062)
with Optional Priority
Thermostat 15116 Thermostat 15117
Thermostat
18050
Thermostat 15118

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Viega Wiring Diagrams
Connecting Viega Thermostats to the Viega Zone Control
Legend: Thermostat
Low Voltage
Line Voltage
Part Numbers: 15116, 15117, and 15118
■ Connect the RC terminal from the
thermostat to R terminal on the zone
control.
■ 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.
■ Connect the C terminal from the
thermostat to the C terminal on the
zone control.
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Viega
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Viega
Viega
Powerhead (15061, 15070)
2 Wire, 24 V
For use with Stainless Manifold
Thermostat 15116 Thermostat 15117
Thermostat
18050
Powerhead
(15064, 15069)
4 Wire, 24 V,
For use with
Stainless Manifold
Zone Control (18060, 18062)
with Optional Priority
Thermostat 15118

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
C
O
B
W/E
RH
G
Y
Thermostat -15118
W2 Y2
RC
Class II
Transformer
C
R
120 V AC
Power Supply
N
L
Viega
Viega
Black
White
Connecting Viega Thermostats
to 2-Wire Powerheads
Connecting Viega Thermostats
to 4-Wire Powerheads
4 powerheads may be connected to each
thermostat
4 powerheads may be connected to each
thermostat
C
O
B
W/E
RH
G
Y
Thermostat -15118
W2 Y2
RC
Class II
Transformer
C
R
120 V AC
Power Supply
N
L
Red
Red Yellow
Yellow
Viega
To T-T boiler
contact, pump
replay or other
auxiliary device
requiring contact
closure.
Legend: Thermostat
Low Voltage
Line Voltage

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
System Operation
Indicators:
The COOL ON, HEAT
ON or icon will
display when the COOL,
HEAT or (fan) is on.
The compressor delay
feature is active if these
icons are 󶈶ashing. The
compressor will not turn
on until the 5 minute
delay has elapsed.
Important:
The low battery indicator is displayed when the AA battery power is low. If the user fails
to replace the battery within 21 days, the screen will only show the low battery indicator
but maintain all functionality. If the user fails to replace the batteries after an additional 21 days
(days 22-42 since first “low battery” display) the set points will change to 55°F (Heating) and 85°F
(Cooling). If the user adjusts these setpoints away from these it will hold for 4 hours then return to
either 55°F or 85°F. After day 63 the batteries must be replaced immediately to avoid freezing or
overheating because the thermostat will shut the unit off until the battery is changed.
Thermostat Display
Indicates the current
room temperature.
Displays the user
selectable setpoint
temperature.
Low Battery Indicator:
Replace batteries when this
indicator is shown.
1 LCD Display
2 Glow in the dark light button
■Push the glow in the dark button and
screen will illuminate.
3 Fan switch
■Set to AUTO to run the fan anytime heating
or cooling is running.
■Set to ON to run the fan at all times.
4 System switch
■Set to heating / cooling or o󶈴.
5 Easy change battery door
■2 AA batteries included
6 Temperature setpoint buttons
■Use the + or - buttons to adjust the room
temperature.
1
6
2
3 4
5

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Programming the Thermostat
Tech Settings
1 Select OFF with the System Switch.
2 Hold down the + and - buttons together for 3
seconds.
3 Use the + and - to change setting for that
step, and the glow in the dark light button to
move from one step to another.
Tech Settings LCD will Show Adjustment Options Factory
Default
Settings
Room Temperature Calibration
This feature allows the installer to
change the calibration of the room
temperature display. For example,
if the thermostat reads 70° and you
would like it to read 72° then select +2.
You can adjust the room
temperature display to
read -4°F to +4°F above
or below the factory
calibrated reading.
0°F
Compressor Short Cycle Delay
The compressor short cycle delay
protects the compressor from “short
cycling”. This feature will not allow
the compressor to be turned on for 5
minutes after it was last turned off.
Selecting ON will not
allow the compressor
to be turned on for 5
minutes after the last
time the compressor
was on. Select OFF to
remove this delay.
On
°F or °C
Select F for Fahrenheit temperature
read out or select C for Celsius read out.
°F for Fahrenheit
°C for Celsius
F
4 To exit Tech settings, slide System Switch
to different position or wait approximately 20
seconds.

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Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Swing Settings
1 Select COOL or HEAT with the System
Switch. They are set separately.
2 Hold down the + and - buttons together for
3 seconds.
Swing Settings LCD will Show Adjustment Options Factory
Default
Settings
Cooling Swing
The swing setting often called “cycle
rate,” “differential,” or “anticipation”
is adjustable. A smaller swing setting
will cause more frequent cycles and a
larger swing setting will cause fewer
cycles.
The cooling swing
setting is adjustable
from ±0.2°F to ±2°F.
For example: A swing
setting of 0.5°F will
turn the cooling on at
approximately 0.5°F
above the setpoint and
turn the cooling off at
approximately 0.5°F
Below the setpoint.
0.5
Heating Swing
The swing setting often called “cycle
rate,” “differential,” or “anticipation”
is adjustable. A smaller swing setting
will cause more frequent cycles and a
larger swing setting will cause fewer
cycles.
The heating swing
setting is adjustable
from ±0.2°F to ±2°F.
For example: A swing
setting of 0.5°F will
turn the heating on at
approximately 0.5°F
below the setpoint and
turn the heating off at
approximately 0.5°F
above the setpoint.
0.4
Swing Setting Tip
Temperature swing, sometimes called
di󶈴erential or cycle rate can be customized
for this individual application. For most
applications choose a swing setting that is as
long as possible without making the occupants
uncomfortable.
3 To exit Swing settings, slide System Switch
to different position or wait approximately 20
seconds.

Viega LLC
585 Interlocken Blvd.
Broomfield, CO 80021
Phone [phone]
www.viega.us
Viega Nonprogrammable Thermostat User Guide
UG-HC 566439 1219 Nonprogrammable Thermostat
Adjusting the Room Temperature
The current room temperature is displayed in
large text in the center of the thermostat under
the “room temperature” heading. The set point
or desired room temperature is in the upper
right corner of the display under “set at”. To
raise or lower the desired “set at” temperature
use the red and blue + and - buttons on the top
right of the thermostat.