2.The water heater(s) shall be equipped with a fixed
G.Firing Mode
1.For model 399B, provide on/off control of the gas input to the water heater (stage fire optional).
2.For models
H.Water Heater Diagnostics
1.Provide external LED panel displaying the following water heater status/faults:
a.Power on – Green
b.Call for heat – Amber
c.Burner on – Blue
d.Safety fault – Red
2.A Central Point Wiring board with diagnostic LED’s indicating the status of each relay.
3.Provide ignition module indicating the following flash codes by LED signal:
a.1 flash – low air pressure
b.2 flashes – flame in the combustion chamber w/o CFH
c.3 flashes – ignition
d.4 flashes – low hot surface igniter current
e.5 flashes – low 24VAC
f.6 flashes – internal fault
I.Combustion Chamber: The lightweight, high temperature,
J.Venting
1.When routed vertically, the water heater’s flue material and size shall be in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition (Category I).
2.When routed horizontally, the water heater(s) flue material and size shall meet or exceed the requirements as specified for Category III in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition.
3.The water heater(s) shall be ducted combustion air ready.
K.Cabinet
1.The
2.The water heater(s), if located on a combustible floor, shall not require a separate combustible floor base.
3.The water heater(s) shall have the option of venting the flue products either through the top or the back of the unit.
4.Combustion air intake shall be on the left side of the cabinet, right side optional.
L.Water Heater Operating Controls
1.The water heaters(s) shall feature an optional
2.Water temperature sensors shall be shipped loose for field installation by installing contractor.
Specifier Note: The remaining items in this section are options. Delete those that are not being specified. IMPORTANT: The Cold Water Start and Cold Water Run Systems cannot be used on the same water heater.
M.Water Heater Pump - Refer to Equipment Schedule
N.SureRack™ Water Heater Stacking Kit
1.The water heaters shall be stacked directly one on top of the other, without offset, to minimize footprint.
O.Cold Water Start System
1.The water heater(s) shall be configured with a cold water start automatic proportional bypass system that ensures the water heater will experience inlet temperatures in excess of 105ºF in
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