INSTALLATION
Mounting the Thermostat
ATTACH THE MOUNTING BRACKET TO THE WALL
1. Place the bracket on the wall where you would like
the thermostat to be and mark the two holes with a
pencil.
2. Using a 3/16” drill bit, drill out the marks you just
made on the wall.
3. Insert the wall anchors into the holes pressing flush
with the wall.
4. Place the bracket over the holes and fasten with the
supplied #8 screws.
The installer should be an experienced and trained
HVAC contractor. Failure to read and follow
instructions carefully before installation or
operation could damage this control or cause
property damage. Test the finished installation for
proper operation.
Mount the EWT-3900 Thermostat about 5 feet
above the floor in an area with good air circulation
and average temperature. DO NOT install the
thermostat where it can be affected by:
drafts or dead spots behind doors and in
corners
hot or cold air from ducts
radiant heat from sun or appliances
concealed pipes and chimneys
on surfaces such as an outside wall, that
are a different temperature than the room
air temperature.
Mounting the Receiver
Mount the receiver with the supplied mounting
screws near the zone control panel or HVAC
equipment to be controlled.
Do not mount the
receiver inside the equipment cabinet or any
other metal enclosure. Do not Mount the
receiver in any location than is subject to
freezing and/or condensation.
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- [email protected]
2
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power to HVAC system at main
fuse or circuit breaker box until installation is complete.
WARNING
!
Do not use circuits exceeding specified voltage. Higher
voltage will damage control and could cause shock or
fire hazard.
Do not short out terminals on gas valve or primary control
to test. Shorted or incorrect wiring will damage thermostat
and could cause personal injury and/or property damage.
Thermostat installation and all components of the system
shall conform to Class 2 circuits per the NEC code.
Technical Data
Power
Working Environment
Range
Shell
Dimension
Connection Interface
Wireless Frequency
Communication baud rate
Wireless Channels
Communication Distance
AC24V, 50/60Hz
30°F~99°F
0~90%RH(non-condensing)
Fire Retardant PC ABS
4.55x3.85x1.78 in (HxWxD)
Each terminal is capable of accepting
2 x 18 AWG solid copper wires.
433MHz
2.4 kbps
1~10 Channels
Beeline distance 200ft in the field. (The
distance will shorten through walls and floors)
4
.5
5
”
1.78”
3.85”
C
R
E
/W
1
W
2
Y
2
G
O
B
N
C
Y
1
Copyright © 2009 EWC Controls All Rights Reserved
To conserve power, the EWT-3900 leaves the
factory in Standby Mode. When removed from
the box, “PE” will be displayed on the LCD to
indicate Standby Mode. When you are ready to
use the thermostat, press and hold the
round center button for five seconds to exit
Standby Mode.
