3
Part Number 550-110-737/1108
GWS-090E
Gas-Fired Water Boiler –
Boiler Manual
1 Prepare boiler location
continued
Service clearances
1. Provide minimum clearances for cleaning and servicing the
boiler and for access to controls and components as listed in
Table 1 below:
2. Provide at least screwdriver clearance to jacket front panel
screws for removal of front panel for inspection and minor
service. If unable to provide at least screwdriver clearance,
install unions and shutoff valves in system so boiler can be
moved for servicing.
Clearances
Flooring and foundation
Flooring
The GWS-090E boiler is 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 founda-
tion pad if any of the following is true:
•
floor can become flooded.
•
the boiler mounting area is not level.
2. See Table 2, below, 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,
per ANSI Z223.1, paragraph 5.1.9:
• Mount the boiler a minimum of 18 inches above the floor of
the garage to assure 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.
Minimum clearance to combustible materials
1. Hot water pipes must be at least ½” from combustible mate-
rial.
2. Vent pipe must be at least 2 inches from combustible material
except where otherwise noted in GWS Venting Manual.
Small space installations
1. When the boiler is located in a closet or small space, provide
clearances no less than those shown in Figure 1. The clear-
ances are required to any surface, whether combustible or
non-combustible.
Table 2
Minimum foundation size
Boiler
model
number
Minimum
foundation
length
Minimum
foundation
width
GWS-090E
25”
18”
Figure 1
Minimum clearances in small spaces
Table 1
Minimum service clearances
