LAARS NeoTherm NTV1000 - Install and Operating Manual - Manual (Page 34)

LAARS Heating Systems
Page 30
7.3 24 VaC transformer with Integral
Circuit Breaker
24 VAC is supplied by a transformer mounted on the
control panel. All 24 VAC power is supplied through
a circuit breaker that is part of the transformer. The
transformer is then connected to terminal blocks 1
and 2 (TB1 and TB2).
7.4 Signal Connections
See Section 9 for details on the following
connections:
• System sensor
• Call for heat/thermostat
• Outdoor air temperature sensor
• Aquastat for domestic hot water
• External control connections
7.5 optional field Connections
Optional components, such as low water cutoffs,
flow switches, additional high limits and other field
supplied devices can be installed as shown on the
wiring diagram (Fig. 21).
7.6 ladder and Wiring Diagrams
(See Figures 20 and 21.)
Caution
When servicing controls, label all wires prior to
disconnection. Wiring errors can cause improper
and dangerous operation. Verify proper operation
after servicing
table 10 - electrical Data
Voltage 120 V AC
Current - FLA 12 A
Current - Nominal 5A