5
INSTALLATION AND OPERATION INSTRUCTIONS
IBC INDIRECT WATER HEATERS - ALL MODELS
2) - Pre-Installation Considerations
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 sixty 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.
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. The Model 30 should only be considered for residences with minimal
water demand, or for commercial applications without showers.
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. To
determine performance with other boiler outputs, refer to the expanded capacity
tables #6 and #7 in Section 9 of this manual.
3. Circulator sizing
Refer to Table 2 and table 5 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 1” pipe around the entire loop on typical residential sites.
A. 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.
See Section 8,
Mechanical Drawings #1, #2 and #3.
2. Hybrid System- The space heating zones use zone valves for each zone,
and the water heater is controlled with an additional circulator.
See Section 8,
Mechanical Drawing #5.
Supplied with this Water Heater:
The IBC Water Heater is shipped
with the following items:
1 x 210°F x 150 psig T & P relief
valve
1 x IBC 10KΩ Temperature sensor
Installation Instructions
Warranty Sheet
NOTE
If this water heater is to be
installed with a different
make of boiler than IBC, the
sensor supplied will not be
compatible. The temperature
well in the IBC water heater
is designed to accept a
number of different aquastat
thermostats which can be
ordered separately. Contact
your IBC Distributor to order
an alternate temperature
controller.
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.
