Horstmann DRT 2 Instruction Manual

HORSTMANN
BRISTOL BS4 1UP
Email: sales@horstmann.co.uk
Website: www.horstmann.co.uk
TABLE OF CONTENT

A. Installation and Mounting....................

1. Installation........................................

2. Wiring................................................
3. Mounting........................................... 5
B. Start/Reset..................... .................. 6
C. Normal Time Mode............................. 7
D. Normal Time Setting Mode.................. 8
E. Factory Defined Programs.................. 9
F. Set Program...................................... 10
G.Temporary/Permanent Override Mode.. 11
H. Control Off/ Sleep Mode..................... 12

I. Jumper Selection.............................. 13

J. Specification.................................... 14

1
J. Specification:
1.Temperature measurement: 0.0 - 40 C
(0.1 C/step)
K
2.Accuracy: 0.5 C
3.Temperature control range: 5.0 - 35.0 C
(0.5 C/step)
4.Switching: 24..250VAC 50/60Hz
5(3.5)A max
5.Terminals: 2.5mm cable
6.Electronic control: Type 2.B action
7.Battery: 2 x 1.5V AAA alkaline
battery
8.Operating temperature: 0 - 50 C
9.Storage temperature: -10 - 60 C
10.Sensing Element: NTC thermistor
13
2. Wiring:
There are 3 wiring terminals at the bottom of DRT 2,
labeled as "Com"(Common), "NO"(normal open)
and "NC"(normal close). Connect heater or cooler to
the "NO" and "Com" terminals. Leaves unused hole
blank.
- Wire the correct cables to the terminal block
according to the circuit diagram which is attached
inside the thermostat top cover.
- Push all cables back into wall prior to fixing to
avoid trapping wires.
- It is recommended that a 5A fuse is fitted.(Please
refer to the wiring diagram on the last page.)
3. Mounting:
Using the accessory screws and wall anchors
provided, mount DRT 2 with the key-hole at the
back. The thermostat should be mounted on the wall
as shown in step 3 of Figure1. Install the cover on
DRT 2 as shown in step 4 of Figure1.
3
Digital ProgrammableThermostat
Terminal block connecting Label:
2
3
4
DRT 2 LCD Programmable Thermostat
° A. Installation and Mounting:
°
Caution:
°
Turn off DRT 2 and the electrical devices (e.g.
°
heater,cooler)which will be connected before
°
installation. It is highly recommended that the
installation procedure is processed by trained
personnel.
2
1. Installation Location:
The thermostat should be mounted on an inner wall
°
1.5m above the floor in position where it is readily
°
affected by changes of the general room temperature
with freely circulating air. Prevent direct exposure to
sunlight; dripping or splashing area. Do not place this
unit at a location where air circulation is low, or where
it has great temperature changes (e.g. near door). Do
not place the thermostat near heat/cool generating
sources.
Control Off Mode:
The LCD is fully turned off. The heater/ cooler is
switched off, irrespective of the current control
temperature setting.
I.Jumper selection:
Delay / No Delay jumper:
No delay
Delay
Choose the Delay option if compressor heat is
connected.
12-hours / 24-hours mode jumper:
When the 12-hours option is selected, the time is
shown in 12-hours mode. Otherwise, the time is
shown in 24-hours mode.
Heater / Cooler jumper:
Select the heater option when a heater is connected
to DRT 2. Select the cooler option when a cooler is
connected to DRT 2.
DRT 2
for
Weekday/Weekend Setting
Instruction Manual
L
DRT 2
COM NO NC
N
14
2
Heater Cooler
10sec 4mins
4mins 4mins
12