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Table 2.2: Performance Specifications
K2WTC Space Heating Ratings
Domestic Hot Water (DHW) Ratings
1
Input, MBH
Hot Water Draw Limits, GPM
Model Number
Input, MBH
Heating
Capacity,
MBH
2
Net AHRI
Water,
MBH
AFUE, %
Max.
3
Min.
4
Min
Max
Min
Max
70°F
77°F
90°F
Rise
Rise
Rise
K2WTC-135B
12
120
112
97
95.0
12
135
3.3
3.0
2.6
0.5
K2WTC-150B
15
150
142
123
95.0
15
150
3.9
3.7
3.1
0.5
K2WTC-180B
18
180
169
147
95.0
18
180
4.5
4.1
3.5
0.5
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
Size
Fig 2.1 Dim
“A”, (in)
Connection Size (NPT Male)
Boiler Water
Content,
(Gal.)
Net Weight,
(lbs.)
Supply/Return
Hot/Cold
Gas
135
15
1
3/4
1/2
0.53
109
150
19
1
3/4
1/2
0.79
126
180
19
1
3/4
1/2
0.79
126
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).
III. Before Installing
II. Specifications
(continued)
Table 2.4: Vent Lengths
Model
Size
Nominal
Vent/Intake
Size (in.)
Min. Vent
Length (in.)
Max Vent
Length (ft.)
Approx.
Derate at Max
Vent (%)
135
3
12
135
7
150
3
52
135
7
180
3
52
135
9
Summary of Contents for K2WTC-135
Page 81: ...81 107774 02 4 18 X Domestic Hot Water Piping continued Figure 10 1 Domestic Hot Water Piping...
Page 89: ...89 107774 02 4 18 XI Wiring continued...
Page 90: ...90 107774 02 4 18 Figure 11 8 Internal Wiring Connections Diagram XI Wiring continued...
Page 101: ...101 107774 02 4 18 Lighting and Operating Instructions XII Start Up and Checkout continued...
Page 142: ...142 107774 02 4 18 XVI Repair Parts continued...
Page 145: ...145 107774 02 4 18 XVI Repair Parts continued...
Page 148: ...148 107774 02 4 18 XVI Repair Parts continued...
Page 150: ...150 107774 02 4 18 XVI Repair Parts continued...
Page 152: ...152 107774 02 4 18 XVI Repair Parts continued 120 121 122 123 124 125 126 127...
Page 159: ...159 107774 02 4 18 SERVICE RECORD DATE SERVICE PERFORMED...
