Install Instructions

9
107750-01 - 9/17
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
(%)
320
3
30
60 8.2
4 30 135 3.7
399
3 30 50 5.3
4 30 135 2.9
See Section VII “Venting” for additional requirements and details.
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 “Venting” 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 “Venting”.
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).
• For new radiant heating systems, refer to the radiant tubing manufacturer’s boiler sizing guidelines.
• For system which includes an indirect water heater, make sure the boiler has the output called for by the indirect
water heater manufacturer’s instructions.
4. All boilers are shipped from the factory congured for 0 - 2,000 ft. altitude. For high altitude installation above 2,000
ft., see Appendix A.
5. All boilers are shipped from the factory congured for use with natural gas. They may be converted for use with
LP gas (“propane”) using proper conversion kit per Table 3.1. Use a combustion analyzer and follow all instructions
supplied with conversion kit.
III. Before Installing
II. Specications (continued)
Size LP Conversion Kit
320 108015-01
399 108015-02
Table 3.1 LP Conversion Kits