Prepare Boiler Location - Weil-McLain 2 Series Manual

series
GV90+

Prepare boiler location

Installations must follow these codes:
• Local, state, provincial, national codes, laws, regulations and ordinances.
• National Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest edition.
• Standard for Controls and Safety Devices for Automatically Fired
Boilers, ANSI/ASME CSD-1, when required.
• National Electrical Code, ANSI/NFPA 70 - latest edition.
• For Canada only: Natural Gas and Propane Installation Code, B149.1
or B149.2 Installation Code and CSA C22.1 Canadian Electrical Code
Part 1 and any local codes.
The GV90+ boiler gas manifold and controls met safe lighting and other
performance criteria when boiler underwent tests specified in ANSI Z21.13
— latest edition.
For the Commonwealth of Massachusetts, read and follow
the special instructions located on
Install the boiler so control system and gas ignition system
components are
during operation. Allowing these components
water or rain
to become wet could cause a boiler failure, resulting in severe
personal injury, death or substantial property damage.
High altitude installations
GV90+ boiler controls automatically reduce input with increasing altitude.
See Figure 1 for estimated input at altitude as a percentage of sea level
input. Multiply the boiler sea level input by this percentage to obtain the
estimated high altitude input. Note that the length of the venting system
will also have a minor impact on input. Refer to the vent supplement for
further information.
No modifications to the boiler should be necessary for installations up to
5,500 feet above sea level. For higher elevations, the air pressure switch
must be changed to a special high altitude switch. Refer to the high altitude
kit instructions, page 10. Note that the gas valve outlet pressure must be
checked (and adjusted if necessary) following instructions on page 63.
DO NOT sidewall vent DIRECT EXHAUST APPLICATIONS
at altitudes above 5,500 feet. Sidewall venting is only allowed
for DIRECT VENT
altitudes above 5,500 feet.
Vent length also affects boiler input — the boiler automati-
cally derates to compensate for pressure loss through the
vent. See the derate values given in Figure 109, page 103. For
high altitude installations, multiply the % in Figure 1 times
the value shown in
vs sea level.
Service clearances
When possible, install GV90+ boilers with clearances at least as large as
shown in Figure 2 for best service access.
Flooring
The GV90+ 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.
6
gas-fired water boiler – boiler manual
2
page 34 of this manual.
protected from dripping or spraying
applications (ducted combustion air) at
Figure 109, page 103 to determine input
Estimated GV90+ input at altitude
Figure 1
Altitude
(feet)
1,000
2,000
3,000
4,000
5,000
5,500
6,000
7,000
8,000
9,000
10,000
Figure 2 Service clearances (recommended)
Part number 550-143-010/1021
% Sea level input
97
93
90
87
83
82
80
77
74
72
69