UTICA BOILERS UB90 125 Installation Manual And Operating Instructions page 6

• Connected to a suitable hot water heating
system.
• Supplied with a suitable electrical supply for
all boiler motors and controls.
• Connected to a properly located thermostat
or operating control. (not included with boiler)
• Placed on level surface (must NOT be in-
stalled on carpeting)
• Condensate drain line must be pitched down
to floor drain or external condensate pump with
reservoir at ¼"per foot (wood frame or blocks
may be used to raise boiler).
LOCATING THE BOILER
1. Select a location which is level, central to the
piping systems served and as close to the vent
and air intake terminals as possible.
2. Accessibility clearances, if more stringent (i.e.
larger clearances) than required fire protection
clearances, must be used for the boiler installa-
tion. Accessibility clearances may be achieved
with the use of removable walls or partitions.
3. The boiler is approved for installation in clos-
ets and on combustible floors. This boiler shall
NOT be installed on carpeting.
TABLE 4 - BOILER CLEARANCES
Combustible
Unit
Clearance
Top 1"
Left Side 8"
Right Side 1"
Base 1"
Front 0"
Back 1"
Intake/Vent
0"
Piping
Near Boiler Hot
1"
Water Piping
All distances measured from the cabinet of the boiler.
4. The clearances shown in Table 4 indicate re-
quired clearances per CSA listing. A min. 1" clear-
ance must be maintained between combustible
construction and each of the right, top and back
surfaces of the boiler. A min. 8" clearance is re-
quired on the left side, to allow room for the inlet
air pipe. An 18" clearance must be maintained at
Accessibility, Clean-
ing, and Servicing
8"
24"
-
-
24"
-
-
-
6
the front where passage is required for cleaning or
servicing, inspection or replacement of any parts
that normally may require such attention. Allow at
least 24" at the front and left side and 8" at the top
for servicing. No combustible clearances are re-
quired to venting or combustion air intake piping.
5. Equipment shall be installed in a location
which facilitates the operation of venting and
combustion air intake piping systems as de-
scribed in this manual.
6. Advise owner of boiler to keep venting and
combustion air intake passages free of obstruc-
tions. Both the venting and combustion air intake
piping systems connected to the outdoors must
permit flow through the piping systems without
restrictions for the boiler to operate.
7. The boiler shall be installed such that the
automatic gas ignition system components are
protected from water (dripping, spraying, rain,
etc.) during operation and service (circulator re-
placement, control replacement, etc.).
8. The boiler must be located where ambient
temperatures (minimum possible room temper-
atures where boiler is installed assuming boiler
is not in operation and therefore contributes no
heat to the space) are always at or above 32°F
to prevent freezing of liquid condensate.
COMBUSTION AIR/VENT PIPE REQUIREMENTS
This boiler requires a dedicated direct vent system.
In a direct vent system, all air for combustion is
taken directly from outside atmosphere, and all flue
products are discharged to outside atmosphere.
ROOF VENT/INTAKE TERMINATIONS
8" MINIMUM
VERTICAL SEPARATION
BETWEEN COMBUSTION
AIR INTAKE AND VENT
MAINTAIN 12" MINIMUM
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL
Combustion air and vent pipe connections must
terminate together in the same atmospheric pres-
sure zone, either through the roof or sidewall (roof
termination preferred). See Figures 1 and 2 for re-
quired clearances.
15'' MAXIMUM
3'' MAXIMUM
SEPARATION
12''
MIMIMUM
COMBUSTION
AIR
Figure 1