Burnham 40A - Manual (Page 5)

5
II. Pre-Installation
Inspect shipment carefully for any sign of damage. All
equipment is carefully manufactured, inspected and
packed. Burnham Corporation's responsibility ceases
upon delivery of water heater to the carrier in good
condition. Any claim for damage or shortage in
shipment must be filed immediately against the carrier
by the consignee. No claims for variances or shortages
will be allowed by Manufacturer, unless presented
within sixty (60) days after receipt of equipment.
Installation must conform to the requirements of the
authority having jurisdiction. In the absence of such
requirements, installation must conform to National
Plumbing Code and National Electrical Code,
ANSI/NFPA No. 70, current edition.
IMPORTANT DECISIONS REQUIRED BEFORE
INSTALLATION:
A. Sizing
1. Alliance™ Model - Choose the Alliance™ model
based on the expected water usage of the building.
The average residence with one shower or more
will require a model AL40A or larger. The AL26A
should only be considered for residences with
minimal water demand or for commercial
application where showers are not present.
Factors which dramatically increase water demand
include high flow shower heads, whirlpool tubs,
and the use of multiple showers at the same time.
Upsize the tank size if any of these factors are
CAUTION
The heat transfer medium must be water or other non-toxic fluid having a toxicity rating or class
of 1, as listed in clinical Toxicology of Commercial Products, 5th edition.
The pressure of the heat transfer medium must be limited to a maximum of 30 psig by an
approved safety or relief valve.
NOTICE
This w ater heater has a limited warranty, a copy of w hich is printed on the back of this manual.
It is the responsibility of the installing contractor to see that all controls are correctly installed
and are operating properly when the installation is complete.
present.
Consult Burnham for size recommendations for
installation with unusual water demand.
Refer to Table 3 for water heater performance
specifications.
2. Boiler DOE Heating Capacity The Alliance™
water heater will provide the rated performance
only if used in conjunction with a boiler with a
DOE heating capacity at least as much as the
minimum noted in Table 3. If the boiler has less
capacity, the output of the tank will be reduced. To
determine the approximate reduction in output from
the tank use the following formula:
For example, what would the first hour rating be if
a model AL53A were installed with a boiler having
a DOE heating capacity of 120,000 BTU/h?
Increasing the boiler DOE heating capacity above
the values listed in Table 3 will not increase the
rating of the water heater.
3. Circulator Sizing - Refer to Table 3 for the
minimum flow rate through the water heater coil
and the corresponding pressure drop through the
coil. Calculate the pressure drop of all straight pipe
and fittings on the supply and return of the water
heater at the minimum flow rate. Add the piping/
fitting pressure drop to the pressure drop through
the water heater coil.