NTI TRINITY Ts80, Инструкция по установке и эксплуатации

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Ts Series Installation and Operation Instructions
│ Trinity Ts
37
Low Voltage Connections
All line voltage wiring connections to the Trinity Ts are made at the junction box in the control panel located at
the bottom of the boiler cabinet. The control panel junction can be accessed by removing the front door of the
boiler, followed by the removal of the control panel junction box cover. Each boiler is provided with one hole
and two knockouts for routing line voltage wiring and two grommets for routing low voltage wiring into the
bottom of the control panel junction box. Low voltage field connections identified in Table 11-2 are to be read
in conjunction with Figure 11-2.
Table 11-2 Low Voltage Field Connections
Connection Location Description
COM
(24VAC)
1
24VAC Common
– Neutral for the 24VAC power supply from the boiler. COM can be
used in conjunction with terminal R to provide a power source for a digital thermostat.
R
(24VAC)
2
24VAC Hot
- Power supply for inputs LIM and Thermostat.
LIM 3
External Limit
– Input requiring 24VAC from terminal R to permit the burner to operate.
Comes factory equipped with a jumper to the R terminal. For installations requiring the
use of an additional safety switch, such as a LWCO, Flow Switch, or auxiliary temperature
limit, remove the factory installed jumper and install the normally open isolated contacts of
the additional limit in its place.
THERMOSTAT 4
Central Heat Demand
– Input requiring 24VAC from terminal R to initiate a Central Heat
call. Switch is made using an isolated end switch (dry contact) via thermostat, zone
controller or other device.
DHW 5
DHW Tank Demand
– Input requiring closure of terminals 5 and 7 to initiate a demand
for DHW. Switch made via isolated end switch (dry contact) from a thermostat (aquastat)
located in an Indirect Fired Water Heater.
OD
SENSOR
6
Outdoor Temperature Sensor
– A wall mountable OD Sensor is included with each
boiler. When connected to terminals 6 and 7, the control will indicate the outdoor
temperature and adjust the boiler temperature set point during a Central Heat demand.
SENSOR
COM
7
Sensor Common
– Common port for field inputs DHW, OD Sensor and 4-20mA(+).
4-20mA(+) 8
External Modulation Control
– Using a 4-20mA signal connected to terminals 7 and 8,
an external control can be used to directly modulate the burner firing rate or adjust the
active set point. This can be useful for applications using external staging controls or
Building Automation Systems.
Low Voltage Terminals
– Terminal 2 (R) has 24VAC potential from the internal
transformer. Do not connect power from this terminal to any other terminal other than
terminals 3 and 4 (LIM and Thermostat). Failure to follow these instructions may damage the unit.
Fuse (24VAC)
- Trinity Ts models are equipped with a “blade style” 2 Amp fuse to
protect the internal transformer located within the control panel box.