Lochinvar KNIGHT 399 User Manual Page 26
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Installation & Operation Manual
26
4 Sidewall direct venting
SIDEWALL
TERMINATION PLATE
VENT
PIPING
GALVANIZED
THIMBLE
(WHEN REQUIRED BY LOCAL CODES)
ELBOW
ELBOW
AIR PIPING
BIRD SCREEN
BIRD SCREEN
Figure 4-5B A Typical Sidewall Termination Assembly
- Models 399 - 800 PVC/CPVC or Stainless Steel
Termination and fittings
1. Prepare the vent termination elbow and the air termination
elbow (FIG. 4-5B) by inserting bird screens. Bird screens
can be obtained locally.
2. When completed, the air termination coupling must be
oriented at least 12 inches (305 mm) below the vent
termination and at least 12 inches (305 mm) above grade or
snow line as shown in FIG. 4-1A, page 23.
3. Maintain the required dimensions of the finished
termination piping as shown in FIG. 4-1A, page 23.
4. Do not extend exposed vent pipe outside of building more
than shown in this document. Condensate could freeze and
block vent pipe.
5. PVC/CPVC terminations are designed to accommodate any
wall thickness of standard constructions per the directions
found in this manual.
6. Stainless steel terminations are designed to penetrate walls
with a thickness up to 9.25 inches of standard construction.
All vent pipes and air inlets must
terminate at the same height to avoid
possibility of severe personal injury,
death, or substantial property damage.
Multiple vent/air terminations
1. When terminating multiple Knight XL’s terminate each
vent/air connection as described in this manual
(FIG. 4-6A).
2. Place wall penetrations to obtain minimum clearance of
12 inches (305 mm) between vent pipe and adjacent air
inlet elbow, as shown in FIG. 4-6A for U.S. installations.
For Canadian installations, provide clearances required by
CSA B149.1 Installation Code.
3. The air inlet of a Knight XL is part of a direct vent
connection. It is not classified as a forced air intake with
regard to spacing from adjacent boiler vents.
VENT
12” (305 MM) MIN
15” (381 MM) MAX
12” (305 MM) MIN. BETWEEN EDGE
OF AIR PIPE AND ADJACENT VENT
PIPE
AIR
Figure 4-6B Alternate Multiple Vent Terminations
w/Field Supplied Fittings (must also comply with
Figure 4-1B)
WARNING
Prepare wall penetrations (Alternate - Field
Supplied Option)
1. Air pipe penetration:
a. Cut a hole for the air pipe. Size the air pipe hole as
close as desired to the air pipe outside diameter.
2. Vent pipe penetration:
a. Cut a hole for the vent pipe. For either combustible
or noncombustible construction, size the vent pipe
hole with at least a 1/2 inch clearance around the vent
pipe outer diameter:
• 5½ inch hole (140 mm) hole for 4 inch (102 mm)
vent pipe
• 7½ inch hole (191 mm) hole for 6 inch (152 mm)
vent pipe
b. Insert a galvanized metal thimble in the vent pipe
hole as shown in FIG. 4-5B.
3. Use a sidewall termination plate as a template for correct
location of hole centers.
4. Follow all local codes for isolation of vent pipe when passing
through floors or walls.
5. Seal exterior openings thoroughly with exterior caulk.
12" MIN. BETWEEN EDGE OF AIR
INLET AND ADJACENT VENT OUTLET
VENT / AIR
TERMINATION
VENT
AIR
Figure 4-6A Multiple Vent Terminations (must also
comply with Figure 4-1A)
- Models: 399 - 800 1
- Contents 2
- Hazard definitions 2
- Please read before proceeding 3
- Model 399 5
- Model 500 6
- Models 600 - 800 6
- Knight XL Boiler 7
- I=B=R Rating 7
- Other Specifications 7
- ALCOVE INSTALLATION 9
- 1 Determine boiler location 10
- (continued) 11
- 2 Prepare boiler 13
- 3 General venting 15
- General venting (continued) 17
- 4 Sidewall direct venting 23
- Prepare wall penetrations 25
- Description and usage 27
- 5 Vertical direct venting 30
- Prepare roof penetrations 31
- Termination and fittings 31
- "A" 33
- 6 Hydronic piping 34
- Hydronic piping (continued) 35
- 7 Gas connections 41
- Gas connections (continued) 43
- 8 Field wiring 45
- 8 Field wiring (continued) 47
- 9 Condensate disposal 49
- 10 Start-up 50
- 10 Start-up (continued) 51
- 11 Operating information 56
- Protection features 57
- Cascade (continued) 59
- Figure 11-1 Control Panel 61
- Status Display Screens 63
- 12 Maintenance 67
- 12 Maintenance (continued) 69
- 13 Diagrams 72
- 13 Diagrams (continued) 73
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