MACH® Series
Gas-Fired Boiler
Installation
10
Dimensions (inches)
Type of Surface
A B C† D
Combustible Surfaces
Minimum Clearances
18 18 18 18
Recommended Clearances
for Service Access
30 12* 12 18**
† "C" Space required for pipes, ducts, etc. in this area above the boiler.
* “B” Clearance depends upon exhaust vent configuration.
** Do not put pipes, ducts, vents, etc in this space. Electrical conduit must be installed vertically so that the side
doors can be opened.
Bumping hazard from overhead ducts! Install all components with adequate vertical
clearances.
3.4 E
LECTRICAL
C
ONNECTIONS
The boiler is wired for 120 volts, single phase, 60 hertz. The total operating amperage is indicated on the rating
nameplate. Each C2500 boiler requires less than 17 amps. Before starting the boiler, check to ensure that the proper
electrical service is connected to the boiler.
An external electrical disconnect (not supplied with the boiler) is required. The boiler electrical service must be
installed and grounded in accordance with local codes or in the absence of such requirements, in the U.S. with
National Electrical Codes, ANSI/NFPA No. 70 latest edition or, in Canada, to the Canadian Electrical Code, Part I,
CSA C22.1, latest edition. Installed conduit must not block openings and must allow the side doors to be opened.
NOTICE!
A dedicated earth ground (green
wire) and neutral is required to avoid
nuisance shutdowns. Do not ground
through the conduit. It is also important
that proper polarity be maintained.
Note:
Refer to electrical wiring section (6.1) for terminal block assignments.
3.5 I
NLET
A
IR AND
E
XHAUST
V
ENTING
3.5.1
Applicable Codes & Standards
CODES
United States:
NFPA 54/ANSI Z223.1
National Fuel Gas Code
NFPA/ANSI 211
Chimneys, Fireplaces, Vents and Solid Fuel Burning Appliances
TB2
120V
TB1
View from front of boiler
