14
Low Water Cutoff
/ Flow Switch:
•
Model Ti400
A certified Flow Switch is installed inside the boiler cabinet on the boiler outlet pipe. Check with local authorities
for requirements of additional safety equipment such as a LWCO.
•
Models Ti100-200
A certified LWCO or Flow Switch is not provided in the package, however one is to be field installed in any
application where the boiler is located above the radiation or where local authorities require it. NTI recommends installing a
LWCO or flow switch to prevent the boiler from firing without water in the heat exchanger. Ensure that the water line of the
“Low Water Cutoff” is at least 6” above the top of the boiler.
•
It is recommended that the LWCO be situated so that it can be tested without removing water from the boiler. Tri-cocks and a
gauge glass are highly recommended.
•
NTI recommends against the installation of isolation valves between the LWCO and the boiler.
•
Use the normally open contacts of the LWCO to break line voltage before being supplied to the boiler. Circuit is 120 Volts, 12
Amps.
•
Contact NTI for proper installation and wiring of a Certified Flow Switch for Trinity Models Ti100-200. NTI recommends
“McDonnell & Miller” flow switch model FS8-W installed in a 1”-diameter line. (See recommended pump chart on previous
page.)
The Trinity boiler is to be used only in a Primary / Secondary pumping system. This is to avoid cycling problems in
systems that have poor flow, or heating zones with very small capacities. The primary loop system must be used in
all cases, regardless of the configuration of the secondary system design.
Flow:
The Trinity boiler must have water flow going through the boiler whenever the burner is on.
CAUTION: DAMAGE WILL OCCUR IF THE BOILER IS FIRED WITH NO WATER IN IT, OR REPETITIVE NO FLOW
OPERATIONS, WHICH WILL VOID THE WARRANTY.
NTI
Break 120V power
supply to Boiler.
Relay must be
capable of switching
120VAC at 12Amps.
Low Water Cut Off
No valves
permitted
between the
boiler and
LWCO
Summary of Contents for Trinity Ti 100
Page 35: ...35 12 0 WIRING SCHEMATIC...
