INSTALLATION AND OPERATION INSTRUCTIONS
6
BT INDIRECT SERIES – WATER HEATERS
2.1 Supplied with this Water Heater
The IBC Water Heater is shipped with the following items:
•
Aquastat
•
10KΩ Sensor
•
Instruction Manual
Not Included:
•
Temperature and Pressure Relief Valve
•
Tank Drain Valve
Inspect shipment carefully for signs of damage. All equipment is carefully
inspected and packed. IBC’s responsibility ceases upon delivery of the water
heater to the carrier in good condition. Any claims for damage or shortage, must
be filed immediately against the carrier by the consignee. No claims for variances
or shortages will be allowed by the Manufacturer, unless they are presented
within 7 days after receipt of the equipment.
Installation must conform to the requirements of the authority having jurisdiction.
In the absence of such requirements, it must conform to the National Plumbing
Code and the National Electrical Code ANSI/NFPA No. 70, current edition.
2.2 Important Considerations Before Installation
1.
Water heater sizing
. Choose the water heater model based on the expected
water usage for the given site. The average residence with one shower or
more will require a Model 40 or larger. Factors that increase water demand
dramatically include high flow shower heads, hot tubs, and the use of more
than one shower at a time. Increase the tank size if these factors are present.
Carefully review the IBC Water Heater specifications contained herein, and
consult ASHRAE sizing guides and other reliable references. Dimensions,
weights, ratings, and capacities are outlined in Tables 1 and 2.
2.
Boiler sizing
. The water heater will provide the rated performance only if it is
used with a boiler with a heating capacity of at least as much as the capacity
ratings in Table 2. If the boiler has less capacity, the water heating output will
be reduced.
3.
Circulator sizing
.
Refer to Table 2
for the flow through the water heater coil
and the pressure drop at minimum flow. Calculate the pressure drop across
all piping and fittings connected to the water heater zone. Be sure to include
all zone valves, check valves, and shut-off valves. It is recommended that the
water heater zone be piped with minimum 1” pipe around the entire loop on
typical residential sites.
2.3 System Zone Control
The water heater must be installed as a separate zone from the space heating
system. The water heating zone’s piping and circulator must be sized for the
minimum flow rate with all the zones in use and a maximum flow with only the
water heater in use. This is the reason that the best method of zone control is
with circulators. The three most common systems are:
1.
Zone Circulators
. The space heating zones use a circulator for each zone,
and the water heater is controlled with an additional circulator.
NOTE
BT Indirect Series water
heaters come with a 10KΩ
sensor and a standard
aquastat. The aquastat can
be used to create a call for
heat with most any boiler
manufacturers boiler (relays
may be required in some
cases). The 10KΩ sensor
will work with all IBC boilers
and may also be compatible
with some of the other boiler
manufacturers. Ensure
compatibility if using the
sensor with other boiler
manufacturers equipment.
NOTE
There are a number of
jurisdictional issues that may
prevent this water heater
from being accepted by local
Inspection Authorities. Issues
such as double-wall heat
exchanger requirements,
local or State registration
requirements, may cause an
installation to be rejected.
It is essential that the Installer
check with local Officials
to ensure acceptance of
this equipment prior to the
installation.
IBC will not accept liability
for any of these situations,
although we will assist in any
way we can, in order to help
gain acceptance.
PRE-INSTALLATION
CONSIDERATIONS
2.0
