Operation - EWC Controls EWT-3900 Technical Bulletin

Wireless programmable digital thermostat
Hide thumbs Also See for EWT-3900:
Table of Contents

Advertisement

OPERATION

Fan Operation
If your system does not have a G terminal connection, skip to
the next section (cooling).
1. Turn on power to system.
2. Press
key to ON mode. The blower should begin to
FAN
operate.
3. Move
key into AUTO mode. The blower should stop
FAN
immediately.
Cooling System
1. Press
key to select Cool mode.
MODE
2. Press
key yo adjust thermostat setting below room
temperature. The blower should come on immediately on high
speed, followed by cold air circulation. The display should
show "STG1".
3. Adjust temperature setting to 4°F (2°C) below room
temperature. The second stage cooling should begin to
operate and the display should show "STG1+2".
4. Press
key to adjust the temperature setting above
room temperature. The cooling system should stop operating.
Heating System (Gas)
1. Press the
key until HEAT shows on the LCD display.
MODE
2. Press
key to adjust thermostat setting to 2°F (1°C)
above room temperature. The first stage heating system
should begin to operate. The display should show "STG1".
3. Adjust temperature setting to 4°F (2°C) above room
temperature. If your system configuration is set to STD-2,
the second stage heat system should begin to operate and
the display should show "STG1+2".
4. Press
key to adjust the thermostat below room
temperature. The heating system should stop operating.
6
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
Heating System - (Heatpump Application Only)
1. Press the
2. Press
3. Adjust temperature setting to 4°F (2°C) above room
4. Press
Emergency System (Heatpump Application Only)
EMER Mode bypasses the Heat Pump to use the heat
source wired to terminal E/W1 on the Receiver. EMER is
typically used when compressor operation is not desired,
or you prefer back-up heat only.
1. Press the
2. Press
3. Adjust temperature setting to 4°F (2°C) above room
4. Press the
Copyright © 2009 EWC Controls All Rights Reserved
key until HEAT shows on the LCD
MODE
display.
key to adjust thermostat setting to 2°F
(1°C) above room temperature. The heating system
should begin to operate. The display should show
"STG1". However, if the set point temperature display
begins to flashing, the compressor lockout feature is
operating (see configuration menu, item 10).
temperature. If your system configuration is set to
STD-2, HP2 or HP1, the auxiliary heat system should
begin to operate and the display should show
"STG1+2".
key to adjust the thermostat below room
temperature. The heating system should stop
operating.
key to select EMER. "EMER" will show
MODE
on the display.
key to adjust thermostat setting above
room temperature. The Aux. heating system will begin
to operate. The display will show "STG1" "EMER" to
indicate that auxiliary heat is operating.
temperature. The auxiliary system should begin to
operate and the display should show "STG1+2".
key to adjust the thermostat below
room temperature. The auxiliary heating system should
stop operating.
E-Mail- info@ewccontrols.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the EWT-3900 and is the answer not in the manual?

Questions and answers

Table of Contents