PB MI85 Series, Installation, Operation & Maintenance Manual, Page: 4 / 43

2
A. ACCESSIBILITY CLEARANCES
Install boiler not less than 24
″
(610 mm) between the
left side, top, and front of the boiler and adjacent wall or
other appliance, when access is required for servicing.
B. CLEARANCE FROM COMBUSTIBLE
CONSTRUCTION
The design of this boiler is certified for alcove installation
with the following clearances:
1. 6
″
(152 mm) between sides and combustible
construction.
2. 24
″
(610 mm) between top of jacket and
combustible construction.
3. 6
″
(152 mm) between draft hood and combustible
construction.
4. 6
″
(152 mm) between vent pipe and combustible
construction.
5. 10
″
(254 mm) between rear of jacket and
combustible construction.
C. AIR FOR COMBUSTION AND
VENTILATION
1. Adequate combustion air and ventilation air must be
provided for this appliance in accordance with the
section of the
National Fuel Gas Code entitled, “Air
for Combustion and Ventilation” or applicable
provisions of the local building code. Subsections 2
through 8 as follows are based on the
National Fuel
Gas Code requirements.
2. Required Combustion Air Volume: The total required
volume of indoor air is to be the sum of the required
volumes for all appliances located within the space.
Rooms communicating directly with the space in
which the appliances are installed and through
combustion air openings sized as indicated in
Subsection 3 are considered part of the required
volume. The required volume of indoor air is to be
determined by one of two methods.
a. Standard Method: The minimum required
volume of indoor air (room volume) shall be 50
cubic feet per 1000 BTU/Hr (4.8 m
3 /kW). This
method is to be used if the air infiltration rate is
unknown or if the rate of air infiltration is known
to be greater than 0.6 air changes per hour. As
an option, this method may be used if the air
infiltration rate is known to be between 0.6 and
0.4 air changes per hour. If the air infiltration rate
is known to be below 0.4 then the
Known Air
Infiltration Rate Method must be used. If the
building in which this appliance is to be installed
is unusually tight, PB Heat recommends that the
air infiltration rate be determined.
b. Known Air Infiltration Rate Method: Where
the air infiltration rate of a structure is known,
the minimum required volume of indoor air for
appliances other than fan assisted and for the
Series MI™ Boiler shall be determined as follows:
PREINSTALLATION
1. PREINSTALLATION
Read carefully, study these instructions before beginning work.
This boiler must be installed by a qualified contractor.
The boiler warranty can be voided if the boiler is not installed, maintained and serviced correctly.
The equipment must be installed in accordance with those installation requirements of the authority having
jurisdiction or, in the absence of such requirements, to the current edition of the
National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and Propane Installation Code.
Where required by the authority having jurisdiction, the installation must conform to
American Society of
Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers, ASME CSD-1.
NOTICE
Do not install this boiler on carpeting. Boiler
installation on carpeting is a fire hazard. Install this
boiler on non-combustible flooring or use a
combustible floor pan to install this boiler on other
non-carpeted flooring.
WARNING
Do not install this boiler on combustible flooring
unless it is installed on a special combustible floor
pan provided by PB Heat, LLC. Boiler installation on
combustible flooring without the special pan is a fire
hazard.
To order combustible floor pan, use the 5-digit stock
codes listed in Table 11.1 of this manual.
WARNING
21 ft 3 I
other
ACH 1000 Btu /
hr
Required Volume
other
=
⎛
⎜
⎝
⎛
⎜
⎝