Viega 15118 Instruction sheet

1 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
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.
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. Carefully read these instructions. You could
damage this product or cause a hazardous condition if
you fail to follow these instructions.
W/E
W2
Y2
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
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

2 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
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.
NOTE: Pick an installation location that is easy for the
user to access. The temperature of the location should be
representative of the building
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

3 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
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
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.
Warning: All components of the control system and the thermostat installation
must conform to Class II circuits per the NEC Code.
Terminal
2 Heat 2 Cool
Conventional System
2 Heat 2 Cool
Heat Pump System
3 Heat 2 Cool
Heat Pump System
RC Transformer power
(cooling)
Transformer power
(cooling)
Transformer power
(cooling)
RH Transformer power
(heating)
Transformer power
(heating)
Transformer power
(heating)
C Transformer common Transformer common Transformer common
B Energized in heating Heat pump changeover valve
energized in cooling
Heat pump changeover valve
energized in heating
O Energized in cooling Heat pump changeover valve
energized in cooling
Heat pump changeover valve
energized in cooling
G Fan relay Fan relay Fan relay
W/E First stage of heat First stage of emergency heat First stage of emergency heat
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 & second
stage of heat
W2 Second stage of heat Auxiliary heat relay,
second stage of heat
Auxiliary heat relay,
third stage of heat
Terminal designations
C
W
C
W/E
L
N
R
C
W
Thermostats
15116
15117
Thermostat
15118
Zone Control
18060
18062
18050
Zone Control
18032
Thermostat
18029
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 product instruction to
congure the thermostat for heat pump applications.
RH
RC
RH
RC

4 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
Typical industry wiring diagrams
NOTE: In many heat pump systems with no emergency heat relay a jumper can be installed between E and W2.

5 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
Viega wiring diagrams
ZONE CONTROL (18060, 18062)
WITH OPTIONAL PRIORITY
OFF
ON
ZONE 4 PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 RELAY
N/O N/CCOM
PUMP
END
SWITCH
ISOLATED
END
SWITCH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
FUSE
(5 AMP MAX)
POWER IN
W C
R W CR W CR WCR
1234
120 V AC
Power Supply
L
N
R
C
CC RW NTC A/B
Thermostat -18050
1 2 34 1234 1234
C
O
B
W
RH
RC
G
Y
Thermostat -15116
C
O
B
W
RH
RC
G
Y
Thermostat -15117
C
O
B
W/E
RH
G
Y
Thermostat -15118
W2 Y2
RC
Viega Yellow
Yellow
Red
Red
Viega
Yellow
Yellow
Red
Red
Viega Yellow
Yellow
Red
Red
Viega
Yellow
Yellow
Red
Red
Line Voltage
Low Voltage
LEGEND: Zone Controls
Part Numbers:
15116, 15117 and 15118
1. Connect the "RC" 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.
"C" terminal is optional but
recommended when
using with batteries.

6 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
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
Part Numbers:
15116, 15117 and 15118
1. Connect the "RC" 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.
"C" terminal is optional but
recommended when using
with batteries.
Line Voltage
Low Voltage
LEGEND: Thermostat
Line Voltage
Low Voltage
LEGEND: Thermostat
ZONE CONTROL (18060, 18062)
WITH OPTIONAL PRIORITY
OFF
ON
ZONE 4 PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 RELAY
N/ON/CCOM
PUMP
END
SWITCH
ISOLATED
END
SWITCH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
FUSE
(5 AMP MAX)
POWER IN
WCRW C RW C
RWCR
12
3 4
120 V AC
Power Supply
L
N
Viega
Viega
Viega
Yellow
Yellow
Red
Red
Yellow
Black
White
Yellow
Red
Red
Viega
Yellow
Yellow
Red
Red
R
C
C C RW NTCA/B
Thermostat -18050
POWERHEAD (15061)
FOR USE WITH
STAINLESS MANIFOLD
2 WIRE, 24 V,
POWERHEAD (15064)
FOR USE WITH
STAINLESS MANIFOLD
4 WIRE, 24 V,
JUMPER
3&4 JUMPER
3&4
IF PRIORITY
IS USED
1234 123 4 123 4
C
O
B
W
RH
RC
G
Y
Thermostat -15116
C
O
B
W
RH
RC
G
Y
Thermostat -15117
C
O
B
W/E
RH
G
Y
Thermostat -15118
W2 Y2
RC
Line Voltage
Low Voltage
LEGEND: 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
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
Red
Red Yellow
Yellow
TO T-T BOILER CONTACT, PUMP
RELAY OR OTHER AUXILIAR
Y
DEVICE REQUIRING CONTAC
T
CLOSURE. SEE NOTE 2.

7 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
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.
Note: To insure a solid t between the thermostat and the
subbase:
1. Mount subbase to a flat wall or electrical box.
2. Use screws provided.
3. Drywall anchors should be flush with the wall.
4. Wires should be pushed into the wall.
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.
Important:
High quality alkaline batteries are recommended.
Rechargeable batteries or low quality batteries do not
guarantee a 1-year life span.
To release battery cover press nger bevel on the
left side and lift the cover to access batteries.
Simple operating instructions are found
on the back of the battery door.

8 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
Thermostat display
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 rst “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
42 the batteries must be replaced immediately to avoid
freezing or overheating because the thermostat will shut
the unit off until the battery is changed.
1LCD Display
2Glow in the dark light button
3Set point buttons
4 - 6 Program buttons
7Menu button
8Fan button
9System button
10 Button/battery access door
11 Battery cover

9 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
Programming the thermostat
This thermostat has a technician setup menu for easy
installer conguration. To setup the thermostat for your
particular application:
1. Press MENU button.
2. Press and hold TECH SET button for three seconds. This
three second delay is designed so that homeowners do
not accidentally access the installer settings.
3. Congure the installer options as desired using the
table below.
Use the +or –keys to change settings and the
NEXT STEP or PREV STEP key to move from one
option to another. Note: Only press DONE key when
you want to exit the Technician Setup options.
NOTE: Only press DONE key when you want to exit
the Technician Setup options.
4. Press DONE key to exit.
Technician Setup Steps
Filter Change
Reminder
Room Temperature
Calibration
Minimum
Compressor On Time
Compressor Short
Cycle Delay Cooling Swing Heating Swing
This feature will ash
"FILT" in the display
after the elapsed run
time to remind the
user to change the
lter. A setting of "off"
will disable this feature
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.
This feature allows
the installer to select
the minimum run time
for the compressor.
For example: A
setting of 4 will force
the compressor to
run for at least 4
minutes every time the
compressor turns on,
regardless of the room
temperature
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.
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 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.
LCD will Show
Adjustment Options
You can adjust the
lter change reminder
from "off" to 2000
hours of runtime in 50
hour increments.
NOTE: To reset the
lter reminder, hold
down the third button
from the left for 3
seconds
You can adjust the
room temperature
display to read -4°F to
+4°F above or below
the factory calibrated
reading.
You can select the
minimum compressor
run time from "off",
"3", "4", or "5"
minutes. If 3, 4, or
5 is selected, the
compressor will run for
at least the selected
time before turning 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.
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.
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.
Factory Default Settings
Off 0°F Off On 0.5°F 0.4°F
NOTE: To lock the keypad hold down the +and –keys for three seconds. You will see a lock in the display. To
unlock the key pad hold down the +and –keys for three seconds.

10 of 18
Product
Instructions
PI-PR 566441 1017 (Multifunctional Thermostat) (EN ES FR)
Viega LLC, 12303 Airport Way, Ste. 395 • Broomfield, CO 80021 • Ph: 800-976-9819 • Fax: [phone]
Technician Setup Steps (continued from the previous page)
Keypad Lockout
Heating Temperature
Setpoint Limit
Cooling Temperature
Setpoint Limit °F or °C 12 or 24 Hour Clock Fan Operation
Keypad lockout allows
you to congure the
thermostat so that
none or some of the
keys do not function.
This feature allows you
to set a maximum heat
setpoint value. The
setpoint temperature
cannot be raised
above this value.
This feature allows you
to set a minimum cool
setpoint value. The
setpoint temperature
cannot be lowered
below this value.
This feature allows
you to display
temperatures in either
Fahrenheit or Celsius.
You can select either
a 12 or 24 hour clock
setting.
Select GAS for
systems that control
the fan during a call
for heat.
Select ELEC to have
the thermostat control
the fan during a call
for heat.
LCD will Show
Adjustment Options
Pick PA or FU
PA = partial keypad
lockout, which locks
all the keys except the
+or –keys.
FU = Full keypad
lockout, which locks
out all the keys.
Note: Keypad lockout
instructions are below.
Use the +or –key
to select the maximum
heat setpoint.
Range 44°F - 90°F
Use the +or –key
to select the minimum
cool setpoint.
Range 44°F - 90°F
°F for Fahrenheit
°C for Celsius
Use the +or –key
to select 12 or 24 hour
clock.
GAS or ELEC
Factory Default Settings
PA 90°F 44°F °F 12 hour clock GAS