UTICA BOILERS MAC-150, Installation, Operation And Maintenance Manual

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4
Dimensions
PHYSICAL DATA
Central Heating (Sealed System) 125 / 150
165/ 205
Heat Exchanger Max Allowable Working
Pressure
50 psi [3.45 bar] 50 psi [3.45 bar]
Max System Pressure
43 .00 psi [2.96 bar] 43 .00 psi [2.96 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 gal at 11.6 psi
[10.0 L at 0.8 bar]
2.2 gal at 11.6 psi
[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 reading exceeds this figure larger expansion tank is required.
240011941 REV B, [03/31/2018]
DIMENSIONS
125 & 150 205 & 165
Height 30" [763 mm] 30 " [763 mm]
Width 17
3/4
" [450 mm] 17
3/4
" [450 mm]
Depth 13
9/16
" [345 mm] 21
1/2"
[571 mm]
Condensate Trap Connection
13/16" [21mm]
ID Hose
3/4" [19.1 mm]
NPT
System Supply
3/4” [19.1 mm] 1” [25.4mm]
DHW Outlet (125 Optional)
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” [25.4mm]
Boiler Filling Connection 1/2" [15.9mm] External to Boiler
Primary Water Content 1 gal [3.60 L] 1
1/4
gal [4.73 L]
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