4
Dimensions
Central Heating (Sealed System)
125 / 150
Heat Exchanger Max Allowable Working Pressure
50 psi [3.45 bar]
Max System Pressure
30
.00
psi
[2.11 bar]
Min System Pressure
7.25
psi [ 0.50 bar]
Max System temperature
176°F
[80°C]
Pressure Relief Valve Setting
30
.00
psi [2.11 bar]
Expansion Tank Minimum Size
(pre-charge
press.)
2.2
gal at 11.6 psi
[10.0
L at
0.8 bar]
Recommended System Pressure (cold)
21.7 psi [1.5 bar]
Domestic Hot Water (Sealed System)
150
Max Inlet Water Pressure
116 psi [8 bar]
Min Inlet Water Pressure
2.9 psi [ 0.2 bar]
Min DHW Flow Rate
0.55 gpm [2.50 L/min]
Max DHW Temperature
140°F [60°C]
DHW Water Content
0.05 gal [0.23 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 reading exceeds this figure larger expansion tank is required.
PHYSICAL DATA
DIMENSIONS
125 & 150
Height (Bottom of boiler top of safety Valve)
43.65" [1.09 m]
Overall Width with Manifold
24.70" [628 mm]
Depth
17.46" [444 mm]
Condensate Trap Connection
3/4"
NPT
System Supply
11/4” Sweat Connection
DHW Outlet (125 Optional)
(125)
3/4” Sweat
Connection
(150)
1/2” Sweat
Connection
Gas Connection
3/4” NPT
DHW (Cold Water) Inlet
(125)
NA
(150)
1/2” Sweat
Connection
System Return
11/4” Sweat Connection
Boiler Filling Connection
External to Boiler
Primary Water Content
1 gal [3.60 L]
240012564 REV A, [05/15/2019]