Raypak HD101, HD401 Surge Protection, Check the Power Source, Making the Electrical Connections

Model	Input	3/4”			1”		1-1/4”		1-1/2”
No.	(KBTUH)	N	P	N		P	N	P	N	P
HD101	100	105	385	340
HD151	150	50	180	160		530	600
HD201	199	30	95	95	355		360
HD251	250	20	50	60	230		240
HD301	299	15	35	45	170		170	550	360
HD401	399	5	20	25	80		100	365	210

Table H: Maximum Equivalent Pipe Length

Natural gas – 1,000 BTUH per ft3, .60 specific gravity at 0.5 in. WC pressure drop Propane gas – 2,500 BTUH per ft3, 1.50 specific gravity at 0.5 in. WC pressure drop

Install a separate disconnect means for each load. Use appropriate-sized wire as defined by NEC, CSA and/or local code. All primary wiring should be 125% of minimum rating.

It is strongly recommended that all individually-pow- ered control modules and the heater should be supplied from the same power source.

Surge Protection

Microprocessor-based and solid state controls are vul- nerable to damage from voltage and amperage fluctuations in the power supply. All sensitive control components should be protected by a suitable com- mercial-grade surge protection device.

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

Check the Power Source

WARNING: Using a volt-ohm meter (VOM), check the following voltages at the terminal block inside the unit. Make sure proper polarity is followed and house ground is proven.

AC = 108 Volts AC Minimum, 132 Volts AC MAX AB = 108 Volts AC Minimum, 132 Volts AC MAX BC = < 1 Volt AC

Fig. 14: Check Power Source

Making the Electrical Connections

Refer to Fig. 14 and the Wiring Diagram.

1.Verify circuit breaker is properly sized by referring to heater rating plate. A dedicated circuit breaker should be provided.

2.Turn off all power to the heater. Verify that power has been turned off by testing with a volt-ohm meter prior to working with any electrical connec- tions or components.

3.Observe proper wire colors while making electrical connections. Many electronic controls are polarity sensitive. Components damaged by improper electrical installation are not covered by warranty.

4.Provide an external surge suppressor capable of maintaining system integrity.

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