Raypak 133-4001 manual Electrical Connections, Low Water Cut-OffOptional

Low Water Cut-Off (Optional)

The probe-type low water cut-off automatically shuts down burner whenever water level drops below the probe for more than 2 seconds. A 30-second time delay prevents premature lockout due to temporary conditions such as power failure or air pockets.

Fig. 35: Low Water Cut-Off

High and Low Gas Pressure Switches (Optional)

NOTE: The High Gas Pressure Switch is standard on Models 3001-4001

These switches sense either high or low gas pres- sures and automatically shut down burners if abnormal pressures exist.

Fig. 36: Gas Pressure Switch

ELECTRICAL

CONNECTIONS

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

DANGER - SHOCK HAZARD: Make sure electrical power to the heater is disconnected to avoid potential serious injury or damage to components.

This boiler is normally wired for 120 Volts. The voltage is indicated on the tie-in leads. Consult the wiring dia- gram shipped with the boiler in the instruction packet. The "TH" leads are for the remote tank control connec- tion. 24 Volts are supplied to this connection through the boiler transformer.

DO NOT attach line voltage to the "TH" leads on mod- els 133-1826. Before starting boiler check to ensure proper voltage to boiler and pump.

The boiler must be electrically grounded in accordance with National Electrical Code ANSI/NFPA No 70, or with CSA C22.1 C.E.C. Part 1 in Canada.

NOTES:

1.Field install ground to inside of junction box.

2.If any of the original wire as supplied with the boil- er must be replaced, it must be replaced with 105°C wire or its equivalent.

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