Trinity
│
Installation and Operation Instructions
Ti Series
28
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
Field Supplied Components
Pressure Relief Valve (30PSI)
Boiler Loop Circulator (Pump C1 in Figure 9-2)
Pressure Gauge (30PSI)
DHW Loop Circulator (Pump Ap in Figure 9-2, for applications utilizing Indirect
Fired Water Heater only)
DHW Flow Switch (Combi
Only)
Central Heat (CH) Loop Circulator(s)
(e.g. Zone Circulators in Figure 9-2)
Combi Return Manifold,
PN:82470-1 (or -2) see Figures
9-1(c) and (d) (Combi Only)
Central Air Removal Devices (i.e. Micro Bubbler or Air-Scoop)
Pressure Regulating “Fill Valve”
Backflow Preventor
Expansion Tank
Circulating Pumps
– The Trinity Ti boiler is equipped with two 120VAC pump outputs:
1.
PUMP Ap (“Aux. Circ.”)
– Operates during a Domestic Hot Water demand (A-C contact closure).
2.
PUMP C1 (“Circ.”)
– Operates during a Space Heat demand (T-C contact closure). Also operates during a DHW demand
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.
Figure 9-1(d) Ti150 Combi Canada
Boiler Inlet
Relief Valve Port
Boiler Outlet
DHW Outlet
DHW Inlet
Combi Return
Combi Return Manifold
PN: 82470-1
