3
•
Shipped with insulated heavy gauge steel jacket(s) with durable powdered
paint enamel finish. Jacket designed to be installed after connecting supply and
return piping.
D.
Tankless heaters or indirect water heaters
•
Provide ( ) internal tankless water heater(s) inserted into the right hand side
of the tankless intermediate (TI) section in the opening provided. Allow 44”
minimum clearance on right side of boiler for cleaning and servicing. Tankless
openings must be on same side as the flue passage cleanout plates to
minimize space requirements.
E. Boiler
foundation(s):
•
Installer to construct needed support and level concrete foundation(s) where
boiler room floor is uneven or will not support the weight of the boiler(s).
F. Boiler
trim:
1. All electrical components to be of high quality and bear the UL label.
a) Water boiler(s) controls furnished:
1) Combination low temperature limit (operating) and high temperature limit
control.
2) Low temperature limit set according to system design. High temperature
limit set at least 20
°
F higher than the low limit (240
°
F is the maximum
allowable water temperature).
3) Combination
pressure-temperature gauge with dial clearly marked and
easy to read.
4) ASME certified pressure relief valve, set to relieve at 30 PSIG. Optional
relief valves available up to and including maximum allowable pressure.
Side outlet discharge type; contractor to pipe outlet to floor drain or near
floor, avoiding any area where freezing could occur.
b) Steam boiler(s) standard controls furnished:
1) Low pressuretrol (operating) and high pressuretrol set at maximum
pressure as a safety control.
2) Steam pressure gauge with dial clearly marked and easy to read.
3) Gauge cock water set with gauge glass, guards and aluminum water level
plate.
4) ASME certified pressure relief valve, set to relieve at 15 PSIG. Side outlet
discharge type; contractor to pipe outlet to floor drain or near floor,
avoiding any area where freezing could occur.
c) Low water cut-off for water or steam boiler(s):
1) Boiler(s) to be furnished with UL labeled low water cut-off with ASME
working pressure rating equal to the ASME rating of the relief valve.
2) Do not use quick-connect fittings on boiler(s).
3) Install cut-off according to manufacturer’s instructions.
4) Locate so burner shuts down if boiler water level falls below allowable
safe waterline (steam boilers, ¼” above bottom of gauge glass).
5) Steam boiler primary low water cut-off shall be a float type – auto reset.