Electrical Connections Domestic Hot Water

5.	Provide overload protection and a disconnect
	means for equipment serviceability as required by
	local and state code.
6.	Install heater controls, thermostats, or building
	management systems in accordance with the
	applicable manufacturer’s instructions.
7.	Conduit should not be used as the ground. There

1	2	3	4	5	6	7	8	9	10	11	12
STAGE 1		STAGE 2		ENABLE /		INTERLOCK /		ALARM		24V	24VR
				DISABLE OR		LOUVER SW			DRY	CWS / CWR
				SEQUENCER				CONTACTS		FAN / DAMPER
	JUMPERED			(OPTIONAL) JUMPERED						(PILOT DUTY)
	JUMPERED			(OPTIONAL) JUMPERED						(OPTIONAL)
	WHEN NOT USED				WHEN NOT USED

must be a solidly wired ground.

NOTE: A grounding electrode conductor shall be used to connect the equipment grounding conductors, the equipment enclosures, and the grounded service conductor to the grounding

	ONLY
	COPPERUSE
901935 REV 1	CONDUCTORS
P/N

1 2 3

HOT COM G

POWER IN

4	5	6
HOT	COM	HOT
SAFETY VALVE		PUMP

electrode.

Electrical Connections — Domestic Hot Water

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

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

NOTE: Minimum 18 AWG, 105°C, stranded wire must be used for all low voltage (less than 30 volts) external connections to the unit. Solid conductors should not be used because they can cause excessive tension on contact points. Install conduit as appropriate. All high voltage wires must be the same size (105°C, stranded wire) as the ones on the unit or larger.

Installer action is required to electrically enable your Hi Delta heater to operate after making the power con- nections. You must use Terminal Block connections 1 through 4 for the temperature controller, as shown in Fig. 15. This will be done based on the controller option selected with your heater order.

For operation with a Temp-Tracker controller, refer to the Temp-Tracker Instal lation and Operating Instructions, Raypak Catalog number 5000.66 (P/N 241177).

Fig. 15: Terminal Block Connections

Consult the wiring diagram shipped with the heater in the instruction packet. The Stage 1 connections are for the remote tank control through the heaters 24 volt transformer. DO NOT attach line voltage to the Stage 1 connection. Before starting heater, check to ensure proper voltage to heater and pump.

SINGLESTAGE

TANKSTAT

STAGE 1

CONNECTION

ATTACH STAGE 1 CONNECTIONS

ON HEATER TO THE SINGLE STAGE

TANKSTAT AS SHOWN IN THE DIAGRAM ABOVE.

Fig. 16: Single Stage Tankstat

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.

Conduit should not be used as the ground. There

Electrical Connections — Domestic Hot Water

Fig. 15: Terminal Block Connections

Fig. 16: Single Stage Tankstat

HD101, HD401 specifications