2
Installation
(continued)
7
Hot Water Generator Installation and Operation Manual
Examining the unit
After the unit has been set in place and uncrated, it
should be carefully examined to assure that neither the
main unit nor components have been damaged during
shipping. If any evidence of damage is detected that
could affect the safe operation of the unit, contact
Lochinvar Corporation, or your authorized sales
representative, to report the damage and to receive
instructions on how to proceed.
After the unit and all components have been inspected for
damage, it is suggested that all pressure and temperature
control components be checked to assure that they meet
or exceed design specifications. If any discrepancy is
found, contact Lochinvar Corporation, or your
authorized representative, before proceeding with the
installation.
Mounting the unit
The unit should be mounted to the floor, following
applicable architectural / local code requirements, or
accepted standards for the specific installation site. The
unit should be installed in a location with sufficient
clearance to remove the tube bundle for repair or
replacement.
Unit and components
Lochinvar Hot Water Generators are designed to make
installation a relatively simple procedure. Because the
unit is “Packaged”, after placing and mounting the unit,
installation involves the following:
• Connecting the cold water source to the water inlet.
• Connecting the hot water outlet to the hot water feed
line.
• Installing the control valve bulb into the tank bulbwell.
• Connecting the condensate / water return line and
piping it to the recycling system.
• Piping the pressure relief valve to an acceptable drain.
• Connecting the energy source (steam or boiler water)
to the unit.
• Wiring the applicable source of electricity (if the unit is
packaged with a circulating pump or electrically
activated pressure or temperature controls).
Each unit is supplied with CAD drawings that indicate
the location and specifications for each connection that
must be made. In addition, the drawing will enable the
installer(s) to determine the flow direction of both the
water and energy source.
Connecting the cold water source
and the hot water outlet
Before making any connections of water
inlet or outlet to the unit, assure that all
piping is clean and free of foreign material
or scale. This can usually be accomplished
by “blowing out” the pipe. Any foreign
material or scale entering the unit can
adversely affect operation and
performance.
NOTICE
Cold water source
The first step in the installation process is to connect the cold
water source to the water inlet port. The exact location of this
port for the specific unit, as well as inlet pipe diameter and
thread size, can be determined from the CAD drawing
supplied with the unit.
A manual shutoff valve should be installed upstream on the
cold water source as an isolation device. The shutoff valve
should be in the closed position and remain so until the
installation is complete.
NOTICE
For
all
piping connections, the use and / or
type of joint compound or sealer on the
joint should be determined by referring to
local codes, accepted practices, or the
requirements of the installing contractor.
If the cold water source is equipped with an in-line check valve
or backflow preventer, a suitable expansion tank
must
be
installed in the hot water outlet side of the system. See the
supplied CAD drawing(s) or contact Lochinvar Corporation
for expansion tank specifications.
Hot water outlet
The next step in the installation process is to connect the hot
water system piping to the hot water outlet port. The exact
location of this port for the specific unit, as well as outlet pipe
diameter and thread size, can be determined from the CAD
drawing(s) supplied with the unit.
A manual shutoff valve should be installed downstream on the
hot water outlet line as an isolation device in case the unit
must be disconnected from the system. The shutoff valve
should be in the closed position and remain so until the
installation is complete.
