EWC Controls EWT-3707 Technical Bulletin

Installer : Save these instructions for future use!
FAILURE TO READ AND FOLLOW INSTRUCTIONS CAREFULLY BEFORE INSTALLATION OR
OPERATION COULD DAMAGE THIS CONTROL OR CAUSE PROPERTY DAMAGE.
DESCRIPTION
The EWT-3707 is a Programmable Digital Solid State
Thermostat.
Features:
The Thermostat can be powered by 24VAC or two AA
batteries. If both power sources are used, the batteries
will backup the 24VAC.
Compatible Equipment: ULTRA-ZONE Control Panels:
ST-2E/3E, NCM-300, BMPlus3000 & UZC-4.
Two Stage Heating and Single Stage Cooling Equipment.
Gas, Electric, Oil or Hydronic.
LCD continuously displays room temperature.
Temperature set point is displayed when it is being
changed.
Temperature display can be configured in °F or °C.
The Thermostat can be programmed between 45°F and
95°F.
Backlit display.
The thermostat terminal block has the following
terminals: O, B, L, W2, G, Y1, C, R and E/W1.
Filter Monitor to keep track of the systems filter use.
Electrical Ratings
19-30VAC 50/60 Hz
1.0 Amp (Max load per terminal)
Thermal Ratings
Set point Temperature Range 45°F to 95°F
Operating Ambient Temperature Range 30°F to 99°F
Storage Temperature Range 14°F to 140°F
Operating Humidity Range 0-90% R.H. (Non-Condensing)
Technical Data
Power
24VAC, 50/60Hz or two AA
batteries as primary or backup source.
32°F~120°F
Working Environment
5~90%RH(non-condensing)
Range
Fire Retardant PC ABS
Shell
3.5x5.1x1.2 in (HxWxD)
Dimension
Each terminal is capable of accepting
Connection Interface
2 x 18 AWG solid copper wires.
TB-235 090375A0235 Rev. B
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
TECHNICAL BULLETIN
Copyright © 2009 EWC Controls All Rights Reserved
Model EWT-3707
Programmable Digital Thermostat
Mon
AM
TEMP
HOME
HOUR MIN DAY PROG
TODAY
PROG HOLD
AUTO
EMER
ENER
PROG DAY /RUN
Contents:
1 EWT-3707 Thermostat
2 Plastic Wall Anchors
2 #8 x 1" Screws
1 TB-235 Technical Bulletin
!
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.
!
This product does not contain mercury. However, this
product may replace a unit which contains mercury.
EWC Controls Inc. would like to advise all technicians
and consumers that all mercury thermostats should
be recycled. You can take your mercury thermostat
to your local HVAC wholesaler for recycling.
SYSTEM FAN
cool off heat auto ON AUTO
Figure 1
WARNING
ATTENTION
E-Mail- info@ewccontrols.com 1