A.O. Smith COBT TWO Unit Manifold Installation, Operation, General, Filling, Model Manifold Size

OF ELECTRICAL SHOCK. DO NOT ENERGIZE THE BRANCH CIRCUIT BEFORE THE HEATER TANK IS FILLED WITH WATER.

TWO UNIT MANIFOLD

INSTALLATION

Assure water flow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved. Otherwise, the units with the higher water flow may have a shortened life.

Dimensions shown are for minimum space occupied by complete assemblies. Service space in front of units must be included.

MODEL	MANIFOLD SIZE
BTPD-85	2”
BTPN/BTP/COF/COBT - 140	2”
BTPN/BTP/COF/COBT - 200	2 1/2”
BTPN/BTP/COF/COBT - 300	2 1/2”
BTPN/BTP/COF/COBT - 400	3”
BTPN/BTP/COF/COBT - 600	3”

OPERATION

IMPORTANT

AUTHORIZED START-UP REQUIRED. Start-up by an A.O. Smith Authorized BTP/BTPN/COF/COBT Start-Up Agent is required on the models covered in this manual. Start-up and Operation of the units covered by this manual by other than an A.O. Smith Authorized BTP/BTPN/COF/COBT Start-Up Agent will void the warranty.

If you have not already done so, contact your local A.O. Smith Sales Representative or Authorized BTP/BTPN/COF/COBT Start- Up Agent and set-up a date for the start-up service.

The Authorized Start-Up Agent will when they come out to start- up the unit(s) complete one of the following forms for each unit you have and submit it to A.O. Smith Water Products Company to activate your warranty:

Start-Up	Covering Models
Form No.
09063511	BTP Models, 140	- 255 kBTUH
09063510	BTP Models, 270	- 2500 kBTUH
09063512	COBT Models, 140 - 2500 kBTUH
09063514	COF Models, 140 - 2500 kBTUH
09063515	BTPN Models, 400 - 2000 kBTUH

The time to ask any questions you may have about your unit is when the A.O. Smith Authorized BTP/COF/COBT Start-Up Agent is there. Please do not hesitate to ask the agent any questions which you may have regarding the units start-up, operation or maintenance.

A MAINTENANCE section is included at the rear of this manual. Any service required should be performed by an Authorized A.O. Smith Service Agent.

GENERAL

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.

CAUTION

Before proceeding with the operation of the unit make sure the water heater and system are filled with water and all air is expelled.

FILLING

1.Close the heater drain valve by turning handle clockwise.

2.Open a nearby hot water faucet to permit the air in the system to escape.

3.Fully open the cold water inlet pipe valve allowing the heater and piping to be filled.

4.Close the hot water faucet as water starts to flow.

5.The heater is ready to be operated.

COMBUSTION ARRANGEMENT REQUIREMENTS

AND SERVICE RECOMMENDATIONS

1.In order to fire correctly, the burner requires an adequate supply of combustion air. Ventilation to the boiler room should be provided on the basis of one square inch of free air opening for each 1000 BTU/HR input. This excludes the requirements for any other fired equipment in the room. The boiler room should not become excessively hot and under no circumstances should be under negative pressure.

2.The burner must be set up initially and serviced at regular intervals (suggested semi-annually) by a trained serviceman using the proper instruments. During this semi-annual service, primary safety devices should be tested under operating conditions. Failure to routinely test primary safety devices may cause hazards. Suggested test procedures are listed in the following paragraphs. Failure to maintain the correct burner settings may result in inefficient gas consumption, premature wear of burner components, or explosion hazard.

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