4
240012994 Rev. B [08/31/2020]
Dimensions
DIMENSIONS
150 205
Height 30" [763 mm] 30 " [763 mm]
Width 17 " [450 mm] 17 " [450 mm]
Depth 13 " [345 mm] 21 [571 mm]
Condensate Trap Connection
13/16"
[21 mm] ID
Hose
3/4"
[19.1 mm]
NPT
System Supply
3/4” [19.1 mm] 1” [25.4 mm]
DHW Outlet
1/2” [15.9 mm] 3/4” [19.1 mm]
Gas Connection
3/4” [19.1 mm] 3/4” [19.1 mm]
DHW (Cold Water) Inlet
1/2” [15.9 mm] 3/4” [19.1 mm]
System Return
3/4” [19.1 mm] 1” [25.4 mm]
Boiler Filling Connection External to Boiler
Primary Water Content 1 gal [3.60 L] 1 gal [4.73 L]
PHYSICAL DATA
Central Heating (Sealed System) 150
205
Heat Exchanger Max Allowable Working
Pressure
50 psi [3.45 bar] 50 psi [3.45 bar]
Max System Pressure
30.00 psi [2.11 bar] 30.00 psi [2.11 bar]
Min System Pressure
7.25 psi [ 0.50 bar] 7.25 psi [0.50 bar]
Max System temperature
176°F [80°C] 176°F [80°C]
Pressure Relief Valve Setting
30.00 psi [2.11 bar] 30.00 psi [2.11 bar]
Expansion Tank Minimum Size
(pre-charge press.)
2.2 g a l a t 1 1 . 6 p s i
[10.0 L at 0.8 bar]
2.2 g a l a t 1 1 . 6 p s i
[10.0 L at 0.8 bar]
Recommended System Pressure (cold)
21.7 psi [1.5 bar] 21.7 psi [1.5 bar]
Domestic Hot Water (Sealed System)
150 205
Max Inlet Water Pressure 116 psi [8 bar] 116 psi [8 bar]
Min Inlet Water Pressure 2.9 psi [ 0.2 bar] 2.9 psi [0.2 bar]
Min DHW Flow Rate 0.55 gpm [2.50 L/min] 0.55 gpm [2.50 L/min]
Max DHW Temperature 140°F [60°C] 140°F [60° C]
DHW Water Content 0.05 gal [0.23 L] 0.10 gal [0.37 L]
SYSTEM
When boiler is operating at maximum operating temperature, providing heating with all heat emitters operating, pressure gauge
should not indicate more than 26.11 psi / 1.80 bar. If the system pressure increases more than 2 psi at maximum temperature
or if continued relief valve operation is witnessed, then a larger expansion tank is needed.
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