Bradford-White Corp D-38T-155 Manual De Usuario

Power Supply

Dedicated 120 VAC, 60 Hz., 15 A

Current Draw

Less than 5 Amps.

Approved Gas Type

Natural or Propane. Gas supply must match the gas type listed on the water

heater rating label.

Gas Supply Connection

1" NPT connection to gas valve for 370,000 Btu/hr. and over for natural gas,

¾" NPT for rest. Schedule 40 black iron pipe recommended.

Gas Pressure (Nat. & L.P.)

Manifold Pressure: 4.5" w.c. natural gas, 10.0" w.c. L.P. Gas Supply

Pressure: At least 1" above manifold pressure with water heater operating,

14" w.c. maximum.

Venting System

Atmospherically Vented, Type B venting system or approved chimney. Follow

current National Fuel Gas Code requirements or in Canada, the Natural Gas

and Propane Installation Code.

Minimum Clearance for Servicing

24" Front Clearance, 20" Top, 6" Sides.

Maximum Water Supply Pressure

150 PSI.

Thermostat Sensor(s)

Redundant thermister with 11,900 + or - 0.5% ohms resistance at 70 deg. F.

Sensor inside well for lower sensor. Some models use an additional upper

sensor (w/o well) with same resistance values.

Control Board

Honeywell Integrated Control Board for Temperature Control, Flue Damper,

and Ignition Control Functions. Operates on 24 volts AC current from

transformer. Some models use single sensor boards, others use two

sensors.

Control Display

Honeywell LCD Control Display with Temperature Setpoint, Format, and Error

Code Display in User Mode, Diagnostic Functions in Service Mode.

Communicates with Control Board.

Transformer

120 VAC Primary, 24 VAC Secondary, 40 VA.

Pilot

Intermittent Pilot with Spark Electrode and Flame Sensor monitored by Control

Board.

Flue Damper

24 VAC, 60 Hz., 80 Ma.

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Specifications