12
IMPORTANT
1. Understand and follow the plumbing requirements provided in this section.
2.
Keep serviceability in mind when installing plumbing around the boiler cabinetry.
3.
Install fittings that will allow the system to be flushed if needed during annual check-ups.
4.
Add an inhibitor to the system water to prevent limestone and magnetite deposits from forming,
and to protect the boiler from galvanic corrosion (Recommend inhibitor CHP, “Central Heating
Protector” from Fernox).
The Trinity boiler comes in two versions, heating and Combi.
Heating Version – The standard heating version is designed to operate in a hydronic heating system and
can operate with an indirect water heater.
Combi Version – This special version is equipped with internal components to provide hydronic heating
and domestic hot water heating. See Sections 6.1 and 6.3.
6.1 PRIMARY LOOP PLUMBING
Circulating Pump
Due to the Trinity
design, the boiler is more restrictive than a
conventional boiler, thus greater
consideration must be given to the
capabilities of the circulating pump(s) in the
primary-loop (Indirect pump included).
The following is a listing of the
recommended circulators.
Model
Restriction
Head Loss
Minimum
Flow
(us
GPM)
Max. Temp.
Rise
Minimum Primary Pump Size
B&G Grundfos Taco
Ti150 7’
at 6 GPM
6
45
°
F
NRF-33
UP 26-64
0010
Ti200 10’
at 8 GPM
8
45
°
F
PL-36
UP 26-99
0011
Relief Valve (30PSI):
Is provided with the system, and it is to be mounted as shown in the diagram.
Ensure that the discharge of the pressure relief is piped to a location were steam or water won’t cause
personal injury or appliance and property damage.
Boiler Venting:
Hot water boilers are designed to operate with airless water in the system. The Trinity
boiler is provided with a 1/8” Air vent located on the top of the unit. This Air vent is intended to vent the
boiler on initial startup. This device will
NOT
continuously vent air collecting in the primary loop, and it is
not intended to be the primary venting device. The Air Scoop as shown in the diagram is the primary
venting location. It is recommended that an additional Air Scoop be used in the secondary plumbing. If
air continues to be a problem an air scrubber must be used (recommend Spirovent # VJR 100TM for
Ti150 or VJR 125TM for Ti200, use 1-1/4” primary-loop plumbing with model VJR 125TM).
Low Water Cutoff
/ Flow Switch:
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
ALL
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.
Trinity Head loss
0.0
10.0
20.0
30.0
40.0
50.0
2
4
6
8
10
12
14
GPM us
Feet
of
H
ead
T150
T200
