Surge Protection, Check the Power Source

Model	Input	3/4”			1”		1-1/4”		1-1/2”
Model
No.	(KBTUH)	N	P	N		P	N	P	N	P
HD101	100	105	385	340
HD151	150	50	180	160		530	600
HD151	150	50	180	160		530	600
HD201	199	30	95	95	355		360
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.

HD101, HD401 specifications

Raypak is renowned for its commitment to high-quality heating solutions, with the HD101 and HD401 models standing out in their product range. These units are designed specifically for commercial applications, providing reliable and efficient hydronic heating systems. The HD series embodies innovation while addressing the unique demands of larger spaces.

One of the main features of the HD101 and HD401 is their stainless steel construction, which ensures increased durability and resistance to corrosion. This design choice enhances the longevity of the units, making them ideal for various installations in commercial or industrial settings.

Both models are equipped with a high-efficiency heat exchanger that maximizes heat transfer while minimizing energy consumption. This feature is particularly significant in today’s environmentally conscious market, as it contributes to lower operating costs and reduced carbon footprints. The heat exchangers are engineered for easy maintenance, offering simplicity when service is required.

In terms of technology, the HD101 and HD401 include advanced digital controls that allow for precise temperature regulation. This user-friendly interface enables operators to easily manage and monitor heating parameters, facilitating optimal performance and energy management.

The models also feature modulating burners that adjust their output according to the heating demand. This capacity for modulation results in smoother operation and an overall increase in efficiency, as the burners can maintain consistent temperatures without excessive energy use.

Another noteworthy characteristic is their compatibility with various control systems, including BMS (Building Management Systems). This adaptability allows for seamless integration into existing infrastructure, providing users with greater versatility and control over their heating environments.

Both the HD101 and HD401 come with advanced safety features, including flame rollback protection and pressure monitoring, ensuring safe operation even in demanding conditions. Additionally, their compact design allows for easy installation in limited spaces while still providing powerful heating capabilities.

Ultimately, the Raypak HD101 and HD401 are exceptional choices for those in need of high-efficiency commercial heating solutions. With their robust construction, advanced technology, and user-friendly features, these models promise to deliver reliable performance and energy savings for years to come. Whether for a large facility or a specific industrial application, they stand ready to meet the heating challenges of today’s commercial landscape.

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