P-K MACH
®
Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: January 3, 2020
Released: January 3, 2020
Patterson-Kelley 2020
All Rights Reserved.
1004905981 P-K MACH C1500H-C4000 Installation and
Owners Manual (Rev F Jan-2020).docx
Page 15
Mark Description
US Installations
Canadian Installations
A
Clearance to each side of center line
extended above meter/regulator
3 ft. (91 cm) within a height of 15 ft. (4.6
m) above the meter/regulator assembly
B
Clearance to service regulator vent outlet
3 ft. (91 cm)
C
Clearance above grade, porch, deck,
veranda, or balcony
12 in
D
Clearance to window or door that may be
opened
4 ft. (1.2 m) below or to side
of opening
1 ft. (300 mm) above
opening
6 in (15 cm) for appliances
≤ 10,000
Btuh (3 kW)
12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 100,000 Btuh (30
kW)
36 in (91 cm) for appliances > 100,000
Btuh (30 kW)
E
Clearance to non-mechanical air supply inlet
to building or the combustion air inlet to any
other appliance
4 ft. (1.2 m) below or to side
of opening
1 ft. (300 mm) above
opening
6 in (15 cm) for appliances
≤ 10,000
Btuh (3 kW)
12 in (30 cm) for appliances > 10,000
Btu
h (3 kW) and ≤ 100,000 Btuh (30
kW)
36 in (91 cm) for appliances > 100,000
Btuh (30 kW)
F
Clearance to a mechanical air supply inlet
3 ft. (91 cm) above if within
10 ft. (3 m) horizontally
6 feet (1.83 m)
For clearances not specified maintain clearance in accordance with local installation codes and the requirements of the gas supplier
Interior Component Clearances
All vent system components shall be installed so as to maintain the following minimum clearances:
Material
Combustible
Non-Combustibles
Unlisted single wall metal pipe
Do NOT Use
Do NOT Use
Single wall PVC pipe
Do NOT Use
Do NOT Use
UL 1738 listed Category IV vent
Per manufacturer
’s listing
Per manufacturer
’s listing
Flue Connection
The connection from the appliance to the vent should be as direct as possible and the upward slope of
any horizontal breaching should be at least 1/4 inch per linear foot. Examples of the complete exhaust
system with drain is Section
. The appliance connector should incorporate provisions to drain
condensate formed in the vent system. The connector should include an appropriate drain section (not
provided).
