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Installation & Operation Manual
18
3 General venting
Stainless steel air intake/vent
connections
1. Combustion Air Intake Connector (FIG.’s 3-11 and
3-12) - Used to provide combustion air directly to the
unit from outdoors. A fitting is provided on the unit
for final connection. Combustion air piping must be
supported per guidelines listed in the National
Mechanical Code, Section 305, Table 305.4 or as local
codes dictate.
2. Vent Connector (FIG.’s 3-11 and 3-12) - Used to
provide a passageway for conveying combustion
gases to the outside. A transition fitting is provided
on the unit for final connection. Vent piping must
be supported per the National Building Code,
Section 305, Table 305.4 or as local codes dictate.
4” PVC TO 4” STAINLESS
STEEL ADAPTER
Figure 3-12 Near Boiler Stainless Steel Venting
Models 700 - 800
VENT
AIR
4” PVC TO 4” STAINLESS
STEEL ADAPTER
Figure 3-11 Near Boiler Stainless Steel Venting
Models 399 - 600
Stainless steel vent
This product has been approved for use with stainless steel FasNseal
vent systems manufactured by Protech.
Use only the materials, vent systems, and
terminations listed in Table 3B. DO NOT mix
vent systems. Failure to comply could result in
severe personal injury, death, or substantial
property damage.
ƽ WARNING
Installations must comply with local codes.
Stainless steel vent systems must be listed as a
UL-1738 approved system for the United States
and a ULC-S636 approved system for Canada.
NOTICE
Installation of a stainless steel vent system should
adhere to the installation instructions supplied
with the vent system.
NOTICE
The installer must use a specific vent starter
adapter supplied by the vent manufacturer to
adapt to different vent systems. See Table 3B for
approved vent adapters.
NOTICE
Model Description
Lochinvar
Part Number
Vendor and Part
Number
399 - 600
4" SS Adapter** (2) MSC2761 FasNseal - F303759
4" Flue Termination** MSC2198 FasNseal - FSBS4
4" Air Intake
Termination**
MSC2764 FasNseal - FSAIH04
700 - 800
4" SS Adapter** MSC2761 FasNseal - F303759
4" Air Intake
Termination**
MSC2764 FasNseal - FSAIH04
6" Flue Termination** MSC2763 FasNseal - FSBS6
*Note: Part is supplied with the unit.
**Note: Part is supplied in the Kit.
Table 3B Approved Stainless Steel Terminations and Adapters
Table 3C Stainless Steel Vent Termination Kits
Model Kit Number
399 - 600 KIT3136
700 - 800 KIT3137
When a sidewall or vertical rooftop combustion air supply system is
disconnected for any reason, the air inlet pipe must be resealed to
ensure that combustion air will be free of contaminants and supplied
in proper volume.
ƽ DANGER
Failure to properly seal all joints and seams as
required in the air inlet piping may result in flue
gas recirculation, spillage of flue products and
carbon monoxide emissions causing severe
personal injury or death.