© 2003 D 362e - 06/03
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UnOccupied Switch
If an external timer or switch is used, connect the two wires from the external
switch to the
Com
and
UnO Sw
terminals (12 and 14). When these two terminals
are shorted together, the control registers an UnOccupied signal.
Note:
The setback override in the schedule menu of the control overrides any
external signal that is present on the UnOccupied Switch terminals.
STEP FIVE
TESTING THE WIRING
Each terminal block
must be unplugged
from its header on the control before power is applied for testing. To remove the
terminal block, pull straight down from the control.
The following tests are to be performed using standard testing practices and procedures and should only be carried out by
properly trained and experienced persons.
A good quality electrical test meter, capable of reading from at least 0 - 300 V (ac) and at least 0 - 2,000,000 Ohms, is essential
to properly test the wiring and sensors.
Test The Sensors
In order to test the sensors, the actual temperature at each sensor
location must be measured. A good quality digital thermometer
with a surface temperature probe is recommended for ease of
use and accuracy. Where a digital thermometer is not available,
a spare sensor can be strapped alongside the one to be tested
and the readings compared. Test the sensors according to the
instructions in Data Brochure D 070e.
Test The Power Supply
Make sure exposed wires and bare terminals are not in contact
with other wires or grounded surfaces. Turn on the power and
measure the voltage between the
N
and
L
terminals (3 and 4)
using an AC voltmeter, the reading should be between 207 and
253V (ac).
Test The Powered Inputs
Mixing Demand
If a mixing demand is used, measure the voltage between the
Mix Demand
terminals (1 and 2). When the mixing demand
device calls for heat, you should measure between 20 and
260 V (ac) at the terminals. When the mixing demand device is
off, you should measure less than 5 V (ac).
Testing The Outputs
Mixing Pump
(Mix Pmp)
If a mixing pump is connected to the
terminal (5), make sure
that power to the terminal block is off and install a jumper
between the
Power L
and the
Mix Pmp
terminals (4 and 5).
When power is applied to the
Power N
and
Power L
terminals (3
and 4), the mixing pump should start. If the pump does not turn
on, check the wiring between the terminal block and pump and
refer to any installation or troubleshooting information supplied
with the pump. If the pump operates properly, disconnect the
power and remove the jumper.
13
10K
14
UnO
Sw
12
Com
Timer Switch
16
17
18
Mix
Boil
Out
15
Com
4
L
Power
3
N
V
207 to 253 V (ac)
2
Mix
Demand
1
V
20 to 260 V (ac)
L
Power
5
Mix
Pmp
3
N
230 V (ac)
L
N
4
