COMMERCIAL CONDENSING GAS BOILERS

The GB312 series are high performance, compact, condensing com- mercial boilers providing efficiencies up to 93.4%. These boilers are very well suited for large residential applications, multi-unit apartment dwellings, and light to moderate commercial applications. The GB312 is a fully modulating boiler designed for easy installation, simple service and years of trouble free operation. These boilers feature an en- ergy management system (EMS) which uses sensors to monitor status of the boiler and the entire heating system. If the system values deviate from the set values, the system issues a fault or service message. Ad- ditional features include variable speed combustion fan, insulated high output aluminum heat exchanger,oversized clean-outs for easy mainte- nance, BC10 & AM10 controls with digital service diagnostic & status display, integrated condensate neutralizing system and a modulating pre-mix burner.

GB312 Series ON HEAT EXCHANGER

ON PARTS

Optional accessories include upgrading to a logomatic control, 4000 series control for cascading multiple boilers & CSD-1 installation kit (CSD-1 controls normally required in most jurisdictions, purchased separately). Installation features include vertical or sidewall vent- ing up to 100’ equivalent length, direct vent, or through the roof venting, approved for 1 pipe or 2 pipe venting. Venting must be AL29- 4C stainless steel, or CPVC schedule 80. Boiler shipped with temperature/pressure gauge, pressure relief valve, supply & return mating fittings, and check valve. Low water cutoff not included (purchased separately). These boilers are extremely lightweight compared to cast iron commercial boilers and are compact to fit into existing mechanical rooms. Anti-freeze for use with aluminum heat exchangers is required for use with these boilers.

CAT. NO. MFG. NO. MIN. INPUT-MBH MAX. INPUT-MBH IBR GROSS OUTPUT-MBH IBR NET OUTPUT-MBH AFUE% EACH 2W640N GB312/90 132 2W641N GB312/120 132 2W642N GB312/160 176 2W643N GB312/200 220 2W644N GB312/240 264 2W645N GB312/280 309

328.3 440.5 588.3 732.6 880.7

1028.8

4” 4” 4” 4” 4” 4”

305 409 544 676 810 944

2-1/2” 2-1/2” 2-1/2” 2-1/2” 2-1/2” 2-1/2”

265 354 473 586 705 821

2-1/2” 2-1/2” 2-1/2” 2-1/2” 2-1/2” 2-1/2”

1” 1” 1”

93.4 93.1 92.8 92.5 92.2 92.0

$19,265.22 $21,201.42 $25,393.18 $29,398.00 $34,711.53 $38,378.76

MFG. NO. FLUE CONNECTION INTAKE CONNECTION** SUPPLY CONNECTION RETURN CONNECTION GAS CONNECTION DIMENSIONS H x W x D WEIGHT GB312/90 6” GB312/120 6” GB312/160 6” GB312/200 8” GB312/240 8” GB312/280 8”

1-1/4” 1-1/4” 1-1/4”

** Intake air piping must equate to exhaust flue diameter and reduce at connection to boiler

59-3/4 x 39-1/8 x 28.2” 59-3/4 x 39-1/8 x 28.2” 59-3/4 x 47-3/8 x 28.2” 59-3/4 x 47-3/8 x 28.2” 59-3/4 x 55-1/2 x 28.2” 59-3/4 x 55-1/2 x 28.2”

455 lbs 455 lbs 530 lbs 585 lbs 665 lbs 730 lbs

ACCESSORIES FOR GB312 SERIES BOILERS CAT. NO. MFG. NO.

DESCRIPTION

PENDING1 7747019985 3W405

550 Rho-Gard High & low gas pressure switch kit (required for CSD-1) Low water cutoff with manual reset (required for CSD-1) $372.98

PENDING2 HL4006E1125UKIT Manual reset aquastat and well (required for CSD-1) PENDING3 63035899 2H552A

Condensate neutralizer kit 5 Gal. Rho-Gard antifreeze

$162.95

EACH

352

BOILERS