Laars OMNITHERM ONH1250, Инструкции по сборке, установке и эксплуатации

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Page 37
Figure 15. Jumper locations at the Inputs and Outputs
7.E.1 Power
7.E.2 Boiler Pump
If connecting a boiler contactor or pump, use terminals
17 (neutral) and 18 (line voltage). The output of these
terminals is 120VAC with a maximum output current of
1.5 amps. Boiler pump functionality is configured using
the touch screen. (See 8.D.6 on page 70).
The controller energizes the appropriate pump contacts
when it receives a call for heat. Once the call for heat is
satisfied, the pumps will remain on for the defined pump
overrun time.
The boiler pump is fed 120VAC internally from the main
power feed. The current rating of this output is 2.5A
maximum at 250VAC. The system and DHW pump
outputs are dry contacts, both with current ratings of
1.5A maximum at 250VAC. An appropriately sized
contactor must be supplied and installed by a qualified
technician for each of these outputs. Pump functionality
is configured using the touchscreen.
7.E.3
Dry Contacts
DHW Pump
- when connecting a domestic hot water
(DHW) pump, use terminals 19 and 20. As this is a dry
contact, the DHW pump supply voltage or DHW pump
relay coil voltage would be applied at terminal 19, and
when the DHW pump is activated, would be available
at terminal 20. Contact ratings are 250VAC, 1.5A
maximum. DHW pump functionality is configured using
the touch screen.
System Pump
- if connecting a system pump, use
terminals 21 and 22. As this is a dry contact, the
system pump supply voltage or system pump relay
coil voltage would be applied at terminal 21, and when
the system pump is activated, power will be available
at terminal 22. Contact ratings are 250VAC, 1.5A
maximum. System pump functionality is configured
using the touch screen.
Spare 1
and
Spare 2
- no functionality available on this
unit.
7.E.4 Alarm Bell
If connecting an alarm bell, use terminals 27 and 28.
As this is a dry contact, the alarm bell supply voltage is
applied at terminal 27, with the alarm bell connected to
terminal 28.
The
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