NTI Ti100-200 Installation And Operation Instructions Manual page 28

Trinity │Installation and Operation Instructions
Boiler System Plumbing
The Trinity Ti boiler uses a low mass heat exchanger that requires a minimum rate of forced water circulation any time the burner
is operating (See Table 9-3 for minimum flow rates). To ensure the minimum flow rate is attained, the boiler shall- be installed
in a "Primary/Secondary" plumbing configuration utilizing "Closely Spaced Tees" to de-couple the Boiler-Primary loop from the
System-Secondary loop(s). See the example of Primary/Secondary Loop configuration in Figure 9-2.
System Components – As well as a Primary/Secondary Loop Configuration utilizing closely spaced tees a properly installed
system will include the following major components identified in Table 9-2 as a minimum.
Table 9-2 System Major Component Checklist
Factory Supplied Components
 Pressure Relief Valve (30PSI)
 Pressure Gauge (30PSI)
 DHW Flow Switch (Combi
Only)
 Combi Return Manifold,
PN:82470-1 (or -2) see Figures
9-1(c) and (d) (Combi Only)
Circulating Pumps – The Trinity Ti boiler is equipped with two 120VAC pump outputs:
PUMP Ap ("Aux. Circ.") – Operates during a Domestic Hot Water demand (A-C contact closure).
1.
PUMP C1 ("Circ.") – Operates during a Space Heat demand (T-C contact closure). Also operates during a DHW demand
2.
on Combi boilers only.
Ensure pumps are oriented as per the manufacturers' instructions. Wiring of these circulators will depend on the boiler
configuration chosen, i.e. Combi or non-Combi boiler, see Section 11.0 for further wiring details.
Circulators responsible for forcing the water flow rate through the boiler must be sized according to
Table 9-3, see Figure 9-2 for details.
Failure to ensure the minimum water flow rate through the boiler when the burner is on will not only
reduce the operating efficiency of the boiler, but may also cause premature failure, overheating and
void the warranty. Failure to follow instructions may result in fire, property damage, injury or death.
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Figure 9-1(d) Ti150 Combi Canada
DHW Outlet
Combi Return Manifold
PN: 82470-1
Field Supplied Components
 Boiler Loop Circulator (Pump C1 in Figure 9-2)
 DHW Loop Circulator (Pump Ap in Figure 9-2, for applications utilizing Indirect
Fired Water Heater only)
 Central Heat (CH) Loop Circulator(s)
(e.g. Zone Circulators in Figure 9-2)
 Central Air Removal Devices (i.e. Micro Bubbler or Air-Scoop)
 Pressure Regulating "Fill Valve"
 Backflow Preventor
 Expansion Tank
Boiler Inlet
DHW Inlet
Ti Series
Relief Valve Port
Boiler Outlet
Combi Return