Electric Booster– Installation, Operating and Maintenance Instructions
7
Temperature and Pressure Relief Valve:
The relief valve protects the tank from becoming overheated and/or over-pressurized. It opens and releases
water if the temperature exceeds 210ºF or if the pressure exceeds 125 psi (satisfies most local codes).
This device must be installed directly on the booster heater.
Pressure Reducing Valve with By-Pass:
When the supply pressure exceeds the final rinse pressure requirements, a pressure reducing valve with
built-in by-pass should be installed in the supply line to the booster heater. A pressure reducing valve
without a by-pass should not be installed as water expansion due to heating will cause the relief valve to
open.
Optional Extra Low Water Cut-Off:
A number of service calls are caused by energizing the heating elements in a “dry” tank. Even momentary
testing of the installation when the tank is dry will appreciably shorten the life of the element or burn it out
and affect the calibration of the aquastat.
The low water cut-off will protect the heating elements from damage by sensing if the tank is completely
filled with water before allowing the elements to operate.
2.9 WATER QUALITY
Always use good quality water to prolong the life of the booster. Water that is safe to drink and even city
water is not necessarily good quality water for the booster. The use of water treatment and filters can
prevent corrosion and reduce sediment in the booster. Water hardness, pH, and chlorides must be
controlled to normal levels.
PH levels must be between 6.0 and 8.0
Chlorine, chlorides or aggressive sulfates concentrations must be below 100 parts per
million.
If you are unsure, use a water softening system or consult a qualified water treatment expert.
NOTE: All improper use as detailed above could void the warranty of the booster.
Wiring and Controls Instructions Section 3
3.1 WIRING
WARNING
Turn off all the electric power before any wiring or service. All circuit breakers ahead of or related
to the booster operation must be switched off.
All electrical wiring is to be done in accordance with the Canadian Electrical Code, CSA C22.2 part 1, and/or
any local regulations and codes in Canada, or the National Electrical Code, ANSI/NFPA 70 (latest edition)
and/or any local regulations and codes in U.S.A. Verify the nameplate rating and check the related codes
to properly size conductors, switches and over-current protection. Check the voltage at the feeder panel,
compare to the values shown in Table 1, and supply the correct voltage power to the power supply block
on the booster heater. For wire connections, refer to the wiring diagram sticker on the back of the booster
heater front cover.
CAUTION
AC ONLY, USE COPPER WIRE ONLY. DO NOT USE ALUMINUM.
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