3
F.
Maximum allowable working pressure (Specify Pressure): 30, 80 or 160 PSIG
G.
U-
Type Flex Joint: The furnace must incorporate a “U
-
Type” flex joint. The “U
-
Type” flex
joint burner port to furnace minimizes the effects of differential stress as the boiler furnace
expands at a greater rate than the firetubes during operation. Boilers with other types of
furnace to tube sheets construction are not allowed.
H.
Front Access Door: Door to include swing joint with hinges for easy fireside access to
combustion chamber without removal of the door.
I.
Rear Access Door: Door to include swing joint with hinges for easy access to fireside of boiler
without removal of the door.
J.
Boiler Casing: The external surfaces shall be covered with a minimum of 2” mineral fiber
insulation encased within an 18 gauge steel jacket.
K.
Water Capacity: The boiler must be of a high mass, large volume design as listed below:
Gas Input (BTUH)
Minimum Water Capacity (Gallons)
1,000,000
113
1,500,000
113
2,000,000
148
2,500,000
215
3,000,000
215
4,000,000
280
5,000,000
320
6,000,000
440
L.
Include the following:
1.
Handholes or inspection tappings for water-side inspection.
2.
Lifting lug on to of boiler.
3.
Minimum 1” boiler drain valve.
4.
Minimum 1” condensate drain connection.
5.
Tappings or flanges for supply and return connections
6.
Condensate Neutralizer: Each boiler to include a factory supplied condensate
neutralizer appropriately sized based on rated input of the boiler. Each condensate
neutralizer is to be field installed by installing contractor.
2.2 WATER BOILER TRIM
A. Boiler to include the following factory mounted/wired:
1. Theraltimeter gauge
2. ASME relief valve
3. Operating control
4. High limit control (Manual Reset)
5. Modulation control
7.
Probe type low water cut-off (Manual Reset)
