Columbia MCB50 - Ratings & Data - Natural Gas & Propane Gas

3
RATINGS & DATA - NATURAL GAS & PROPANE GAS
Boiler No.
Natural Gas
Inlet*
Dimensions
Pump size Supply &
Return Tappings
A B C D E F
50 ½" 11⅛" 5½" 4" 30¾" 36¼" 6" 1¼"
75 ½" 15 7½" 5" 30¾" 37¾" 6" 1¼"
100 ½" 15 7½" 6" 30¾" 37¼" 6½" 1¼"
125 ½" 18⅞" 9½" 6" 30¾" 37¼" 6½" 1¼"
150 ½" 18⅞" 9½" 7" 30¾" 37¾" 7" 1¼"
175 ½" 22¾" 11½" 7" 30¾" 38¾" 7" 1¼"
200 ½" 22¾" 11½" 8" 30¾" 38¾" 8" 1¼"
250 ¾"
265
13
⁄
16
"
13¼" 8" 30¾" 40¾" 8" 1¼"
300 ¾" 30½" 15¼" 9" 30¾" 42¾" 10" 1¼"
* Propane gas inlet, all units, 1/2"
Boiler
No.
(1)
A.G.A. Input
Btu/Hr.
(1)
Heating
Capacity Btu/Hr.
(1) **
I=B=R
NetOutput
Btu/Hr
(2)
NetRating
Sq. Ft. HW
@ 170
o
No.
of
Burners
(3)
Recommended
Air Cushion
Tank
Water
Content
(Gals.)
50 50,000 42,000 37,000 243 1 15 2.4
75 75,000 63,000 55,000 365 2 15 4.0
100 100,000 83,000 72,000 481 2 30 4.0
125 125,000 104,000 90,000 603 3 30 5.6
150 150,000 124,000 108,000 719 3 30 5.6
175 175,000 143,000 124,000 829 4 30 7.2
200 200,000 165,000 143,000 957 4 30 7.2
250 250,000 205,000 178,000 1189 5 30 8.8
300 299,999 243,000 214,000 1368 6 60 10.4
EXPLANATORY NOTES
--All boilers are design certied for installation on noncombustible oor.
--For installation on combustible oors use combustible oor kit.
--Recommended chimney height 20 feet. In special cases where conditions
permit, chimney height may be reduced to 10 feet. Refer to the latest
revision of NFGC part 11.
--Electric service to be 120 Volts, 15 Amps, 60 Hz.
--The MEA number for the this boiler is 19-79-E.
(1) For elevations above 2000 feet, ratings should be
reduced at a rate of 4% for each 1000 feet above sea
level.
(2) Base on 170° temperature in radiators.
(3) Tank sized for non-ferrous baseboard or radiant panel
systems. Increase size for cast iron baseboard and
radiation.
--Net I=B=R ratings include 15% allowance for normal
piping and pick-up load. Manufacturer should be
consulted on installations having other than normal piping
and pick-up requirements.
** For equivalent square feet of radiation, divide I=B=R
output by 150.
STANDARD EQUIPMENT: Boiler Jacket, Cast Iron Boiler
Battery, High Limit Control, Vent Damper Relay, Theraltimeter
Gauge, Circulator With Return Piping To Boiler, Main Gas
Burners, Combination 24 Volt Gas Control (Includes Automatic
Gas Valve, Gas Pressure Regulator, Automatic Pilot, Safety
Shutoff, Pilot Flow Adjustment, Pilot Filter), A.S.M.E. Relief
Valve, Drain Cock, Spill Switch, Rollout Switch, Automatic Vent
Damper. Not Shown Are: Wiring Harness, Thermocouple,
Non-linting Safety Pilot.
OPTIONAL EQUIPMENT: Intermittent Electric Ignition
Pilot System.