Burnham MEGASTEAM MST288 - Manual (Page 33)

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A. GENERAL
1. Install wiring and electrically ground boiler in
accordance with requirements of the authority
having jurisdiction, or in absence of such
requirements the National Electrical Code, ANSI/
NFPA 70.
2. Refer to National Electric Code or Local Electric
Codes for proper size and type of wire required.
Follow Code.
3. A separate electrical circuit must be run from
the main electrical service with an over-current
device/disconnect in the circuit. A service switch is
recommended and may be required by some local
jurisdictions.
4. Use anti-short bushings on all wiring passing
through boiler jacket, junction boxes and/or control
boxes.
5. Use armored cable (BX) over all exposed line
voltage wiring.
SECTION VI: ELECTRICAL
6. If an Alliance™ SL indirect water heater is used,
use priority zoning. Do not use priority zoning for
Hydro-Air Systems.
7. Wiring should conform to Figure 18.
B. INSTALL A ROOM THERMOSTAT on an
inside wall about four feet above floor. Never install
thermostat on an outside wall or where it will be
influenced by drafts, hot or cold water pipes, lighting
fixtures, television, rays of the sun or near a fireplace.
Keep large furniture away from thermostat so there will
be free movement of room air around this control.
Heat Anticipator in Thermostat should be set to match
the requirements of the control to which it is connected.
See Figures 18 thru 20A for desired system and heat
anticipator setting. If system tends to overheat above
the thermostat's temperature setting, reduce heat
anticipator setting by .1 or .2 amps. If system tends to
short cycle without reaching desired room temperature,
increase heat anticipator setting by .1 or .2 amps.
DANGER
Positively assure all electrical connections are unpowered before attempting installation or service of
electrical components or connections of the boiler or building. Lock out all electrical boxes with padlock
once power is turned off.
WARNING
Failure to properly wire electrical connections to the boiler 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.
Each boiler must be protected with a properly sized fused disconnect.
Never jump out or make inoperative any safety or operating controls.
WARNING
The interrupted hot (red) wire must be connected to the L terminal, the neutral (white) wire must be connected
to the N terminal and the constant hot (black) wire must be connected to the auxiliary terminal or the primary
safety control will be damaged.