Chromalox DTS-HAZ, Руководство по установке, Страница: 8 / 12

8
Start-Up
For up to 30 amp loads, use minimum 10 AWG
wiring or better for 120/277 VAC power input.
Connecting power to the unit.
1. Powering up with 120/277 VAC: To power up the
unit apply 120/277 VAC to the terminal block ac-
cording to the schematic below:
Connections for Power, Cable and Earth Ground
AC Power, Earth & Heating Cable
Terminal Blocks
N or L2 – IN
(AC Low)
Cable OUT
Cable OUT
L or L1 – IN
(AC High)
Protective
Ground
2. Programming with 9VDC battery:
The DTS-HAZ may be programmed with a 9VDC
battery should standard service line voltage be un-
available.
Note: Powering unit with 9VDC should only be used
for programming purposes and not operation of the
unit.
Programming of the 9 VDC battery shall not be
done in hazardous locations.
3. Programming and alarm overview
Digital Thermostat must have the following compo-
nents set to correctly control the temperature:
a. Setpoint – targeted temperature value that con-
troller will aim to reach
b. Hi Temperature Alarm – Temperature at which
the unit goes into high temperature alarm mode.
c. Lo Temperature Alarm – Temperature at which
the unit goes into low temperature alarm mode.
d. Deadband – The allowable temperature differen-
tial between the Set Point and the Sensed Tem-
perature during normal operation. The Deadband
is centered on the Setpoint. The Deadband has a
range of 2 to 10 deg. in 2 degree increments.
The Load is removed once the temperature is 1/2
way between the Setpoint and the upper limit of
the Deadband.
e. Temperature Units – selection between degrees
Fahrenheit or Celsius.
f. Soft Start Function – The soft start may be en-
abled or disabled. When enabled, the Soft start
algorithm initiates at power on & whenever low
end of dead band is realized. When initiated, 0%
- 100% Power is achieved over 167 seconds.
g. Alarm State – The FACTORY DEFAULT SETTING
IS NORMALLY CLOSED. You may toggle this
setting to Normally Open via the control push
buttons.
Connecting RTD Wire
1. Connect RTD wire according to the schematic:
+
-
White
Red
COM
Red
3 Wire RTD
RTD
Com
RTD
-
RTD
+
Alarm Wiring
The alarm on the DTS unit is a non-arcing, solid state
relay. In order for it to properly function, it must be sup-
plied with either AC or DC voltage, depending on which
model is selected. The alarm on the DTS-HAZ func-
tions only with AC voltage. The alarm on the DTS-HAZ-
DC functions only with DC voltage.
DTS-HAZ
Load
AC
12-277 VAC
Customer Supplied
DTS Alarm Wiring Options
DTS-HAZ-DC
Load
DC
0-42 VDC
Customer Supplied
+
-
+
=