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  9. EWC Controls EWT-601-2 User manual

EWC Controls EWT-601-2 User manual

Set At
Installation Manual
Thermostat Application Guide
Description
Gas or Oil Heat
Electric Furnace
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (With Aux. or Emergency Heat)
Multi-Stage Systems
Heat Only Systems
Heat Only Systems - Floor or Wall Furnace
Cool Only Systems
Millivolt
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Power Type
Battery Power
Hardwire (Common Wire)
Hardwire (Common Wire) with
Battery Backup
Table of Contents
Specications
Installation Tips
Thermostat Quick Reference
Wiring
Wiring Diagrams
Technician Setup
Page
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.
Una version en español de este
manual se puede descargar en
la pagina web de la compañia.
Rev. 1841
U.S. Registered Trademark. Patents pending
Copyright 2018 All Rights Reserved.
Specications
The display range of temperature ... 41˚F to 95˚F (5˚C to 35˚C)
The control range of temperature.... 44˚F to 90˚F (7˚C to 32˚C)
Swing (cycle rate or dierential) ...... Heating is adjustable from 0.2˚ to 2.0˚
Cooling is adjustable from 0.2˚ to 2.0˚
Power source ...........................................18 to 30 VAC, NEC Class II, 50/60 Hz
for hardwire
Battery power from 2 AA Alkaline
batteries
Operating ambient ............................... 32˚F to +105˚F (0˚C to +41˚C)
Operating humidity .............................. 90% non-condensing maximum
Dimensions of thermostat ................. 4.7”W x 4.4”H x 0.8”D
Mount Thermostat
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.
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.
Insert 2 AA
Alkaline batteries
(included). High
quality alkaline
batteries are
recommended.
Simple
operating
instructions
are found
on the back
of the
battery
door.
Gas or Electric Setup
Fan Operation Switch
Installation Tips
2-3
4
5
6
7-8
1
Installation Tips Thermostat Quick Reference
Getting to know your thermostat
Temperature setpoint buttons
Fan switch
System switch
Easy change battery door
LCD
The low battery icon is displayed when the AA
battery power is low. Whenever the thermostat
detects low battery voltage from the AA batter-
ies, the low battery icon will begin ashing on
the screen for 21 days (if the batteries are not
changed). If the batteries are not changed 22
days after the thermostat detects low battery
voltage, the thermostat screen will only show
the ashing battery icon until buttons are
pressed. If the batteries are not changed 43
days after the thermostat detects low battery
voltage, the thermostat screen will only
show the ashing battery icon until buttons
are pressed and the set points will oset to
85°F/29°C in cooling and 55°F/13°C in heating.
At this stage, set point changes can be made
temporarily but, the set points will change back
to defaulted values after a 4-hour period. The
thermostat will continue to perform this low
battery ashing, temperature oset condition
until the internal voltage threshold is reached.
When the thermostat internal voltage threshold
is reached, all relays will be opened and the
thermostat will become inoperable until new
batteries are installed.
Important
Removing The Private
Label Badge
About The Badge
All of our thermostats use the same universal magnetic badge. Visit the
company website to learn more about our free private label program.
Displays the
selected setpoint
temperature.
System Operation
Indicators:
The COOL ON, HEAT ON
icon will display when the
COOL, HEAT is on.
NOTE: The compressor delay feature is active
if these icons are ashing. The compressor
will not turn on until the 5 minute delay has
elapsed.
Low Battery Indicator:
Replace batteries when
indicator is shown.
Indicates
the current
room
temperature.
Magnet in door
Subbase Installation
The thermostat should be installed approximately 4 to 5 feet above the
oor. Select an area with average temperature and good air circulation.
• 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
Wall Locations
Vertical Mount
Horizontal Mount
For vertical mount put one screw on the top
and one screw on the bottom.
For horizontal mount put one screw on the
left and one screw on the right.
Pick an installation location that is easy for
the user to access. The temperature of the
location should be representative of the
building.
Installation Tip
Do not install
thermostat in locations:
Failure to disconnect the power before
beginning to install this product can
cause electrical shock or equipment
damage.
Installation Tip:
Electrical Hazard
Use the bevel on lower ridge
UP
EWT-601-2
Set At
Gas: For systems that control the fan
during a call for heat, put the fan
operation switch to the GAS position.
Electric: For systems that do not
control the fan during a call for heat,
put the fan operation switch to the
ELECTRIC position.
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 or you can mail the
thermostat to the address on the
warranty section for proper disposal.
Mercury Notice
Wiring
Caution:
Electrical Hazard
All components of the control
system and the thermostat
installation must conform to
Class II circuits per the NEC Code.
Warning:
Do not overtighten terminal
block screws, as this can
damage the terminal block.
A damaged terminal block
can keep the thermostat
from tting on the subbase
correctly or cause system
operation issues.
Installation Tip
Max Torque = 6in-lbs.
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 Gterminal.
Loosen the terminal block screws.
Insert wires then retighten terminal
block screws.
Place nonammable insulation into
wall opening to prevent drafts.
1.
2.
3.
Terminal Designations
C
OHeat pump changeover valve
energized in cooling
Heat pump changeover valve
energized in heating
WHeat relay
RH Transformer power
for heating
RC Transformer power
for cooling
GFan relay
YCompressor relay
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
If wiring to a heat pump, use a small piece
of wire (not supplied) to connect
terminals W and Y.
(With NO AUX or
Emergency Heat)
C Terminal
The C (common wire) terminal does
not have to be connected when the
thermostat is powered by batteries.
Wire Specications
Use shielded or non-shielded 18-22
gauge thermostat wire.
Failure to disconnect the power
before beginning to install this
product can cause electrical shock
or equipment damage.
B
Common wire from secondary side of
cooling system transformer
Wiring Diagrams
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 switch to Electric
Optional 24 VAC common connection when thermostat is used in battery power mode
Typical 1H/1C System: 1 Transformer Typical 1H/1C System: 2 Transformer
COMPRESSOR
RELAY
HEAT RELAY
FAN RELAY
Typical 1H/1C Heat Pump System Typical Heat-Only System
Typical Heat Only System With Fan Typical Cool-Only System
COMPRESSOR
RELAY
HEAT RELAY
FAN RELAY
RC
RH
Y
C
W
G
C
R
L2
L1(HOT) RC
RH
Y
C
W
G
L2
L1(HOT)
REMOVE JUMPER C
R
COMPRESSOR
RELAY
FAN RELAY
COOL CHANGE
OVER VALVE
HEAT CHANGE
OVER VALVE
OB
C
R
L2
L1(HOT)
RC
RH
Y
C
W
GHEAT RELAY
RC
RH
Y
C
W
G
C
R
L2
L1(HOT)
FAN RELAY
HEAT RELAY
RC
RH
Y
C
W
G
C
R
L2
L1(HOT)
FAN RELAY
COMPRESSOR
RELAY
C
R
L2
L1(HOT)
RC
RH
Y
C
W
G
L2
L1(HOT)
Technician Setup Technician Setup
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
wide as possible without making the occupants uncomfortable.
To exit Swing & Limit Settings, slide the System Switch to
a dierent position or wait approximately 20 seconds.
Tech Settings
1. Select Heat or Cool with the System Switch.
2. Press and hold the + and - buttons together for 3 seconds.
3. Use the + and - to change setting for that step, press the + and -
simultaneously to change between tech settings.
Swing & Limit Settings
To exit Tech Settings, slide the System Switch to
a dierent position or wait approximately 20 seconds.
The compressor short cycle delay
prevents the compressor from
switching on and o too often.
Selecting “ON”will not allow
the compressor to be turned
on for 5 minutes after the
last time the compressor was
switched o. Select“OFF”to
remove this delay.
O
This feature allows the installer
to change the calibration of the
room temperature display. For
example, if the thermostat reads
70 degrees and you would like it
to read 72 then select +2.
0
CA
Room
Temperature
Calibration
You can adjust the room
temperature display to read
4˚above or below the factory
calibrated reading.
Compressor
Short Cycle
Delay ON
Cd
Select F for Fahrenheit
temperature read out or select C
for Celsius read out.
F for Fahrenheit
C for Celsius
F or C F
F
FC
This feature allows you to set a
minimum cool setpoint value.
The setpoint temperature can’t be
lowered below this value.
0.5
The swing setting often called
“cycle rate”,“dierential”or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
Cooling
Swing
The cooling swing setting
is adjustable from 0.2˚ to
2˚. For example: A swing
setting of 0.5˚will turn the
cooling on at approximately
0.5˚ above the setpoint
and turn the cooling o at
approximately 0.5˚ below
the setpoint.
Swing & Limit Settings
Cooling
Setpoint
Limit 44
The swing setting often called
“cycle rate”,“dierential”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˚ to
2˚. For example: A swing
setting of 0.5˚will turn the
heating on at approximately
0.5˚ below the setpoint
and turn the heating o at
approximately 0.5˚ above
the setpoint.
Heating
Swing 0.4
05
CO
This feature allows you to set a
maximum heat setpoint value.
The setpoint temperature can’t
be raised above this value.
Use the + and - key to
select the minimum cool
setpoint.
Heating
Setpoint
Limit 90
HE
04
Use the + and - key to
select the maximum heat
setpoint.
Tech Settings Adjustment Options Default
LCD Will Show Adjustment Options Default
LCD Will Show
1. Select OFF with the System Switch for Tech Settings. Select Heat or Cool for Swing
and Limit settings. They are set separately.
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.

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