Carrier 61SW - Manual (Page 3)

Table 1—Ratings and Capacities
MODEL RATINGS* NET BOILER WATER APPROX
AND TYPE
Max Input Btuh
Heating Capacilyf RATINGS CAPACITY IN SHIPPING
SIZE
Btuh Sq Ft Btuh Sq Ft
GALLONS WEIGHT
61SW-042100 Water 42,500 36,000 240 31,000 207 1.75 211
61SW-075100 Water 75,000 63,000 420 55,000 367 3.00 263
61SW-112100 Water 112,500 94,000 620 82,000 547 4.25 320
61SW-150100 Water 150,000 125,000 827 109,000 727 5.50 369
61SW-187100 ■ Water 187,500 155,000 1033 135,000 900 6.75 426
61SW-225100 Water 225,000 186,000 1240 162,000 1080 8.00 476
‘The above gas inputs are certified for altitudes to 2000 ft.
are computed at 150 Btuh/sq ft.
The seiection factors providing for piping loss and starting
are based on an allowance of 1.15.
tin accordance with U.S. Government test procedures.
For elevations above 2000 ft, reduce input 4 percent for each 1000 ft above sea level. Ratings in square ft
load are those recommended by the Institute of Boiler and Radiator Manufacturers. Net water boiler ratings
ill 12
I___ i
= 1 SQ. INCH
•=• PER 1000
= BTUH
TO VENTED
ATTIC
DUCTS
TO ROOF
1 SO. INCH PER
4000BTUH
12 MAX
Г'
12 MAX
VENT
TO ROOF
____ L____ L____ L_.
1 so. INCH PER
2000 BTUH
DUCTS TO
OUTSIDE
^=-1 SO. INCH
PER 1000 I^BTUH
1 SQ. INCH PER
2000 BTUH
12 MAX 12 MAX
L-
:i ¡1 so. INCH PER
4000BTUH
VENT
TO ROOF
. _________ [.
—;гт~7' 12 MAX
I so. INCH PER
4000BTÜH:—
A90060
Fig, 3—Air From Inside Building
d. When ducts are used, they shall be of the same cross-
----------- seetional-area-as-the-free-area-of-the-openings-to-which-they“
connect. The minimum diniension of rectangular air ducts
shall not be less than 3 in.
“EQUIPMENT LOCATED IN ÜT^CONFÎNËD SPACÈS
An unconfined space is defined as a space whose volume is not
less than 50 cu ft per 1000 Btuh of the total gas input rating of all
appliances installed in that space. Rooms communicating directly
with the space in which the appliances are installed, through
openings not furnished with doors, are considered part of the
unconfined space.
In unconfined spaces in buildings, infiltration may be adequate to
provide air for combustion, ventilation, and dilution of flue gases.
However, in buildings of tight construction (weather stripping,
heavily insulated, caulked, vapor barrier, etc.), additional air may
need to be provided using the methods described in section,
“Equipment Located in Confined Spaces.”
TO VENTED
CRAWL .rn
RPACF DUCT TO
OUTSIDE
liso. INCH PER
) 2000 BTUH
A90059
-------------------Fig*-4—Air-From-Outdoor------------------
LOUVERS, GRILLES, AND SCREENS
-In-calculating-the^ee-arear'Consideration“shall~be“given“tO“the“
blocking effect of louvers, grilles, or screens protecting openings.
Screens used must not be smaller than 1/4-in. mesh. If the free area
through a design of louver or grille is knotvn, it should be used in
calculating the size opening required to provide that free area
specified. If the design and free area is not known, it may be
assumed that wood louvers will have a 20- to 25-percent free area
and metal louvers and grilles will have a 60- to 75- percent free
area. Louvers and grilles that provide combustion and dilution air
must be constructed so they cannot be closed.
Step 3—Water Line Connection
For water-type boilers with the circulator pump mounted on the
RH side, the water outlet (supply to system) must be on the RH