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EGS-I&S-01

8

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.

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

 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.

 

Figure 4 - Aquastat Control

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.

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.

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.

 

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 

C

IRCUMSTANCES 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.

Summary of Contents for EGS-I&S-01

Page 1: ...njury or substantial property damage CAUTION Indicates a potentially hazardous situation which if not avoided could result in death serious injury or substantial property damage NOTICE Indicates special instructions on installation operation or maintenance which are important but not related to personal injury hazards WARNING Indicates a potentially hazardous situation which if not avoided may res...

Page 2: ...required for this water heater This water heater meets or exceeds the ASHRAE IES 90 1b standards with respect to insulation and standby loss requirements CAUTION The maximum boiler water supply temperature to the indirect heat exchanger must not exceed 240 F 116 C WARNING It is the responsibility of the installing contractor to see that all controls are correctly installed and are operating proper...

Page 3: ...Pressure Relief Valves and Vacuum Relief Valves The combination temperature and pressure relief valve must be marked with a maximum set pressure not to exceed the maximum working pressure of the water heater The combination temperature and pressure relief valve must also have an hourly rated temperature steam BTU discharge capacity not less than the hourly rating of the water heater The supplied c...

Page 4: ...le formation Setting the water heater temperature at 120 F will reduce the risk of scalds Some states require settings to specific lower temperatures SACRIFICIAL ANODES Three sacrificial anode rods have been installed in the tank head to extend tank life The anode rods should be inspected annually to determine the amount of sacrificial decay and replaced when necessary to prolong tank life Water c...

Page 5: ...ot water demand is satisfied This option provides maximum delivery of domestic hot water Priority is recommended when a Boiler net output is 100 000 Btu per hour or less or b When boiler output required to satisfy domestic hot water demand is at least 50 of the boiler output required to satisfy space heating demand or c When an interruption in space heating can be tolerated during a long domestic ...

Page 6: ...Expansion Tank If the water heater is installed in a closed water supply system such as one having a back flow preventer in the cold water line provide thermal expansion control Contact the water supplier or local plumbing inspector for additional information MOVE THE WATER HEATER TO A PERMANENT POSITION BY SLIDING OR WALKING WATER CONNECTIONS WARNING FAILURE TO INSTALL AND MAINTAIN A NEW LISTED T...

Page 7: ... system Pipe and fittings between the boiler and Single wall Indirect must be diameter or larger CAUTION Maximum boiler water supply temperature to the indirect heat exchanger must not exceed 240 F 116 C Figure 1 Water Boiler Piping with Zone Valves Figure 2 Water Boiler Piping with Circulators 2 For a space heating system that utilizes CIRCULATORS refer to Figure 2 The Single wall Indirect connec...

Page 8: ...s 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 s...

Page 9: ...g WATER TEMPERATURE ADJUSTMENT 1 The aquastat controls the maximum water temperature in the tank The differential is a fixed 5 F with a 160 F maximum setting set at the factory to 120 F Table 4 details the approximate relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications 2 For the most ene...

Page 10: ...ecommended size as necessary Do not attempt to repair the valve as this could result in improper operation and a tank explosion In areas with poor water conditions it may be necessary to inspect the temperature relief valve more often than once a year If the temperature pressure relief valve on the heater discharges periodically or continuously it may be due to thermal expansion of water in a clos...

Page 11: ...ater electricity on for the zone containing the Single wall Indirect 4 Sediment Annual but harsh water quality may dictate more frequent service Depending on water conditions a varying amount of sediment may collect in the tank Levels requiring service are indicated by a small temperature difference in the supply and return lines See also Scale below Repeated flushing usually clears such material ...

Page 12: ...r or Clean or replace filter or strainer boiler supply strainer if used Aquastat set too high Lower aquastat setting See Operating Instructions Improper system plumbing Compare to plumbing in Water Connections Improper system wiring Compare to wiring in Electrical Connections Aquastat setting too low Adjust aquastat to higher setting See Operating Instruction Undersized boiler with no Rewire for p...

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