-4-
Figure 2
DC-80 / DC-80DW
*Double wall models maximum 360,000 BTUH with both coils.
DC-120/DC-120DW
BOILER
FIRST–HOUR
CONTINUOUS
OUTPUT
RATING
FLOW
(90ºF rise)
(70ºF rise
BTU/HR
GALLONS
steady state)
GPH
80,000 209 139
100,000 236 173
120,000 263 208
140,000
289
242
160,000
316
277
180,000 343 312
200,000 370 346
240,000 423 413
280,000 477 482
320,000 530 551
*360,000 584
620
400,000
637
688
BOILER
FIRST–HOUR
CONTINUOUS
OUTPUT
RATING
FLOW
(90ºF rise)
(70ºF rise
BTU/HR
GALLONS
steady state)
GPH
80,000 117 139
100,000 202 173
120,000 229 208
140,000
256
242
160,000
283
277
180,000 310 312
200,000 337 346
240,000 389 413
280,000 443 482
320,000 469 551
*360,000 550
620
400,000
603
688
Domestic Water Performance
Bottom Coil
Only
Both
Coils
as Input
Product & Benefits
(Con’t)
Commercial applications require rapid recovery to meet high demands. These sites also have large boilers to
accommodate the building(s) heating load. When both coils are utilized to heat domestic water, Premier
™
DC Series
have a heat transfer capability far in excess of traditional single-coil and tank-in-tank indirects. The resulting performance
can allow competitive bids by using fewer heaters than the competition (Figure 2).
Example:
80 Apartment units
700,000 BTUH domestic hot water demand
2-3GPM showerhead
2-3 person occupancy
NOTE:
THESE FIGURES WERE OBTAINED USING 180°F BOILER WATER AT FLOWS OF APPROXIMATELY
15 GPM TOTAL FOR BOTH HEAT EXCHANGERS. UNLIKE MOST INDIRECTS, EXTREME BOILER TEMPS AND
EXOTIC CIRCULATOR PUMPS ARE NOT REQUIRED TO ACHIEVE THESE NUMBERS.
Dual Coil Units Can Reduce the Number of Hot Water Makers Required
