Electrical Connections; Operating Instructions - Lochinvar EGS-I&S-01 Installation & Service Manual

EGS-I&S-01
NOTICE
Typical steam boiler without connections available
below the water line is not recommended due to
insufficient water temperature, especially during
warmer months when the space heating system is
not operational. Boiler water temperature at the
bottom of a steam boiler can be 50°F lower than
the boiler's water temperature limit setting during
such periods.
FILL BOILER SYSTEM
1. On new boiler installations, do not purge the boiler
or space heating system through the water heater.
During any boiler or space heating system flushing,
cleaning, or purging, the water heater should be
isolated to avoid possible attack on the carbon steel
coil by chemical additives.
2. Purge air from boiler/water heater piping.
3. Check system for leaks. Repair as necessary.
DANGER
Positively assure all electrical connections are
unpowered before attempting installation or service
of electrical components or connections of the water
heater or building. Lock out all electrical boxes with
padlock once power is turned off.
WARNING
When installed, the water heater must be electrically
grounded in accordance with local codes or, in the
absence of local codes, with the National Electrical
Code, ANSI/NFPA 70, and /or the CSA C22.1
Electric Code.
Failure to properly wire electrical connections to the
water heater may result in serious physical harm.
Electrical power may be from more than one source.
Make sure all power is off before attempting any
electrical work.

ELECTRICAL CONNECTIONS

Install electric wiring in accordance with National Electric
Code or the Canadian Electrical Code and local regulations.
See the boiler's installation manual for wiring diagrams.
The Single-wall Indirect is supplied with an aquastat
temperature control. This aquastat must be installed in the
aquastat well location of the water heater. Refer to Figure
4. Remove the cover and loosen the clamping screws. Insert
the aquastat capillary bulb to the well bottom as shown and
screw the aquastat clamp securely in the well groove. The
aquastat acts as a thermostat for zone control and should be
wired accordingly. Refer to the boiler or zone control
manufacturer's instructions if any additional wiring is
required. The control is factory set at 120°F and care should
be made to not rotate this dial while wiring the control. Once
electrical connections are complete, secure the aquastat
cover back in place. AT NO TIME SHOULD WATER
HEATER OPERATION TAKE PLACE WITHOUT
THE COVER ON THE CONTROL.
Figure 4 - Aquastat Control
WARNING
Water heaters are heat-producing appliances. To avoid
damage or injury there must be no materials stored against
the water heater, and proper care must be taken to avoid
unnecessary contact (especially by children) with the
water heater. UNDER NO CIRCUMSTANCES SHALL
FLAMMABLE MATERIALS, SUCH AS GASOLINE
OR PAINT THINNER BE USED OR STORED IN THE
VICINITY OF THE WATER HEATER OR IN ANY
LOCATION FROM WHICH FUMES COULD REACH
THE WATER HEATER.
Installation or service of this water heater requires
ability equivalent to that of a licensed tradesman in
the field involved. Plumbing and electrical work are
required.

OPERATING INSTRUCTIONS

SYSTEM START-UP
Follow boiler installation instructions to place boiler in
operation.
SEQUENCE OF OPERATIONS
1. Aquastat senses stored water temperature drops below
desired setting.
a. Domestic hot water priority only: Normally
closed contacts open to interrupt space heating.
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