3
Part Number 550-110-832/1014
OWB & OWT
Series 2
Oil-Fired Water Boilers –
Boiler Manual
1 Prepare boiler location
Minimum clearance to combustible materials
1.
Minimum clearances from vent pipe to combustible material
(see Figure 1, vent clearances indicated with “*”):
• Type “L” doublewall vent — 6 inches minimum
• Singlewall vent — 9 inches minimum
Flue pipe clearances must take precedence over
jacket clearances (listed below).
Service clearances
1. Recommended
service
clearances (see Figure 1):
• Front and top — 24 inches
• Left side, back and right side — 6 inches
• Right side for burner door swing radius — 12 inches
2. Special close clearances (alcove, closet, under counters,
etc.) – see “Appendix,” page 17.
Clearances
Flooring and foundation
Flooring
The OWB and OWT boilers are approved for installation on
combustible flooring, but must never be installed on carpeting.
Do not install boiler on carpeting even if foundation
is used. Fire can result, causing severe personal
injury, death or substantial property damage.
Foundation
1. Provide a solid brick or minimum 2-inch thick concrete
foundation pad if any of the following is true:
• floor can become flooded.
• the boiler mounting area is not level.
2. See Table 1 for minimum foundation dimensions.
Residential garage installations
Take the following special precautions when installing the boiler
in a residential garage. If the boiler is located in a residential
garage:
• Mount the boiler a minimum of 18 inches above the floor of
the garage to ensure the burner and ignition devices will be
no less than 18 inches above the floor.
• Locate or protect the boiler so it cannot be damaged by a
moving vehicle.
Table 1 Minimum foundation size
Figure 1 Minimum clearances
Boiler
model
number
Length
inches
Width
inches
Minimum
height
inches
OWB/OWT-3
17
22
2
OWB/OWT-4
17
22
2
OWB/OWT-5
20
22
2
OWB/OWT-6
23
22
2
