Table of Contents
Advertisement
Table 2.2: Performance Specifications
K2WTC Space Heating Ratings
Input, MBH
Model Number
Min
K2WTC-135B
12
K2WTC-150B
15
K2WTC-180B
18
Notes:
1)
DHW ratings are not AHRI certified.
2)
The Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. The manufacturer should be consulted before selecting a boiler for
installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.
3)
Maximum draw rates shown are at sea level and minimum vent length. Under other conditions draw rates will be reduced proportionally to the reduction in input. See
Table 2.4 and Appendix A for input de-rate information.
4)
Minimum flow rate shown is that required through the boiler to initiate a call for DHW. A higher flow rate may be required through the fixture due to mixing at the
tempering valve and fixture itself.
Table 2.3: Physical Specifications
Model
Fig 2.1 Dim
Size
"A", (in)
135
15
150
19
180
19
Table 2.4: Vent Lengths
Nominal
Model
Vent/Intake
Size
Size (in.)
135
3
150
3
180
3
1.
Safe, reliable operation of this boiler depends upon installation by a professional heating contractor in strict accordance
with this manual and the requirements of the authority having jurisdiction.
• In the absence of an authority having jurisdiction, installation must be in accordance with this manual
and the National Fuel Gas Code, ANSI Z223.1. In Canada, installation must be in accordance with the B149.1
Installation Code.
• Where required by the authority having jurisdiction, this installation must conform to the Standard for Controls
and Safety Devices for Automatically Fired Boilers (ANSI/ASME CSD-1).
2.
Read Section VII to verify that the maximum combustion air and exhaust pipe lengths will not be exceeded in the
planned installation. Also verify that the vent terminal can be located in accordance with Section VII.
3.
Make sure that the boiler is correctly sized:
• For heating systems employing convection radiation (baseboard or radiators), use an industry accepted sizing
method such as the I=B=R Guide RHH published by the Air-Conditioning, Heating and Refrigeration Institute
(AHRI).
8
II. Specifications
Heating
Net AHRI
Capacity,
Water,
MBH
MBH
2
Max
120
112
97
150
142
123
180
169
147
Connection Size (NPT Male)
Supply/Return
1
1
1
Min. Vent
Length (in.)
Length (ft.)
12
52
52
III. Before Installing
(continued)
Domestic Hot Water (DHW) Ratings
Input, MBH
AFUE, %
Min
Max
95.0
12
135
95.0
15
150
95.0
18
180
Hot/Cold
Gas
3/4
1/2
3/4
1/2
3/4
1/2
Approx.
Max Vent
Derate at Max
Vent (%)
135
7
135
7
135
9
1
Hot Water Draw Limits, GPM
Max.
3
70°F
77°F
90°F
Rise
Rise
Rise
3.3
3.0
2.6
3.9
3.7
3.1
4.5
4.1
3.5
Boiler Water
Content,
Net Weight,
(Gal.)
(lbs.)
0.53
109
0.79
126
0.79
126
107774-01 - 9/17
Min.
4
0.5
0.5
0.5
Advertisement
Table of Contents
