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2C�ia �AS°FIRED WATER BOIL�R — �o6�er Manua!
Install water piping (continued) .
Expansion tank and make-up water
1. Ensure expansion tank size will handle boiler and system water ol-
ume and temperature.Allow 3 gallons for boiler and its pi ng.
ACAUTION Undersized expansion tanks cause system w er to be
lost from relief valv� aird make-up water be added
through fill valve.Eventual boiler failure n result due
to excessive make-up water addition.
2. Tank must be located as shown in this manual, r following rec-
ognized design methods. See tank manufact er's instructions
for details.
3. Connect the expansion tank to the air separat r only if the separa-
tor is on the suction side of the circulator.Alw ys install the system
fill connection at the same point as the expa ion tank connection
to the system.
4. Most piping drawings in this manual show iaphragm expansion
tanks.See Figure 14 for piping from air sepa ator to e�cpansion tank
and make-up water line using a closed-typ expansion tank.
5. Most chilled water systems are piped using closed-type tank,as
shown in Figure 19,page 21.
Diaphragm (or bladder) expansion ta k
1. (Figure 14)Always install an automatic air vent o top of the air
separator to remove residual air from the system.
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Figure 14 Expansion tank piping \
Piping to diaphragm (or bladder) expansion tank
System System
return O supply
9
Do not exceed
io �12 inches apart
io � O
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3
0
NOTICE �en using diaphragm or bladder tanks only—wh e
boiler is installed above the system main piping,install
an automatic air vent in the top of the outgoing boiler Alte
piping to prevent air pocketing. �system
return
Closed-type expansion tank
1. See Figure 14, Alternate, for piping connections when using a
closed-type expansion tank.
2. Pitch any horizontal piping up towards tank 1 inch per 5 feet of
piping.Connect to tank with at least 3/4"piping to allow room for
air to rise.
ACAUTION DO NOT install automatic air vents on closed-type
expansion tank systems.Air must remain in the system
• ' and return to the tank to provide its air cushion.An au-
tomatic air vent would cause air to leave system,resulting
in water-logging the expansion tank.
16
Boiler
Boiler outlet
return �,...
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Do not exceed
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expansion tank
System
supply
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�t 03 Make-up water supply O8 Automatic air vent
° �4 Fill vaive,typical � Primary/secondary connection
y g� ; �5 Air separator u3oss 10 System supply/return sensors
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Part number 550-100-066/Of>OS
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2�l� GAS-FIRED WATER BOILER — Boiler Manual
Prepare boiler location
Installations must comply with:
• Local,state,provincial,and national codes,laws,regulations and
ordinances.
• National Fuel Gas Code,ANSI Z223.1-latest edition.
• Standard for Controls and Safety Devices for Automatically Fired
Boilers,ANSI/ASME CSD-1,when required.
• National Electrical Code.
• For Canada only:B149.1 or B149.2 Installation Code,CSA C22.1
Canadian Electrical Code Part 1 and any local codes.
NOTICE The Ultra boiler gas manifold and controls met safe
lighting and other performance criteria when boiler
underwent tests specified in ANSI Z21.13—latest edi-
tion.
Before locating the boiler, check:
1. Check for nearby connection to:
• System water piping
• Venting connections
• Gas supply piping
• Electrical power
2. Check area around boiler. Remove any combustible materials,
gasoline and other flammable liquids.
AWARNING Failure to keep boiler area clear and free of combustible
materials, gasoline and other flammable liquids and
vapors can result in severe personal injury, death or
substantial property damage.
3. The Ultra boiler must be installed so that gas control system com-
ponents are protected from dripping or spraying water or rain
during operation or service.
4. If new boiler will replace existing boiler, check for and correct
system problems,such as:
• System leaks causing oaygen corrosion or heat exchanger cracks
from hard water deposits.
• Incorrectly-sized expansion tank.
• Lack of freeze protection in boiler water causing system and
boiler to freeze and leak.
Provide clearances:
Clearances from combustible materials
1. Hot water pipes—at least 1/2"from combustible materials.
2. Vent pipe—at least 3/is"from combustible materials.
3. See Figure 1 for other clearance minimums.
6
Figure 1 Clearances required
Air/ventilation openings when
required—see"Provide air
openings to room"
12"maximum below
ceiling of enclosure
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FLUE PIPE:
Combustible surfaces—
3(16"min—
Opening in combustible
wall,floor,ceiling or roof
3/8"larger than flue pipe
diameter,fitted with
galvanizetl steel thimble.
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TOP:
Service—
12"min
Combustible
surfaces—
Yi'min
Right SIDE:
Service or
combustible
surfaces—
3"min
Left SIDE:
Service —
3"min
Combustible
surfaces—
Yz'min
BOTTOM:
Service—
0"min
Combustible
surfaces—
0"min
FRONT:
Service—
24"min
Combustible
surfaces—
'/z"min
1. See Figure 1 for recommended service clearances.If you
do not provide minimum clearances shown, it might
not be possible to service the boiler without removing
it from the space.
Wall mounting option
1. Ultra boilers can be wall mounted (using special wall
mount kit) or floor mounted.No clearance is required
at the rear of the unit,either for service or for clearance
to combustible surfaces. '
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Part number 550-100-066/0608
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