Raypak 399B-2339B Single Stage Tankstat, Stage Connection, ATTACH STAGE 1 CONNECTIONS

Installer action is required to electrically enable your heater to operate after making the power connections. You must make a closed contact connection on Stage 1 connector of the Central Point Wiring (CPW) board for temperature control connections. This will be done based on the controller option selected with your heater order.

1.For Closed-Loop Water-Source Heat Pump appli- cations with fixed bypass, your heater should be configured to operate in an on-off firing mode. This means that you will connect a single-pole control to stage one of the CPW board. Then jumper the remaining firing stages. For example, if your heater is a Model 1529B, you will jumper stages two, three and four. Then your heater will either be on at full fire, or it will be off.

2.For 2-stage controller connections, connect each stage of the control to the corresponding stage of the CPW board in the heater, i.e., stage 1 of the heater to stage 1 of the control; stage 2 of the heater to stage 2 of the control, as shown in Fig. 22 and Fig. 25. Set the operating control to the set-point at which you want the heater to maintain. Ensure that the sensing bulb of the control is at the point in the system that will best maintain the tem- perature you want. For example, when you are heating a tank of water, you want the operating control sensor bulb in the tank.

3.For single-stage controller connections, attach the stage 1 connections on heater 1 to the tankstat per Fig. 26.

Heater must be electrically grounded in accordance with the NEC, and CSA C22.1 C.E.C. Part 1 in Canada.

Consult the wiring diagram shipped with the heater in the instruction packet or at the end of this section. The stage-selector terminals are for the remote tank con- trol through the heater’s 24 VAC transformer. DO NOT attach any voltage to the stage-selector terminals. Before starting the heater, check to ensure proper volt- age to the heater and pump.

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

SINGLE

STAGE

TANKSTAT

2-STAGE

TANKSTAT

STAGE 1

CONNECTION

	STAGE 2 CONNECTION OR
STAGE 1
	STAGE 1 CONNECTION
CONNECTION
	OF HEATER 2

ATTACH STAGE 1 CONNECTIONS ON HEATER TO STAGE 1 CONNECTION ON TANKSTAT.

ATTACH STAGE 2 CONNECTIONS OR STAGE 1 CONNECTION OF HEATER 2 TO STAGE 2 CONNECTIONON TANKSTAT AS SHOWN IN THE DIAGRAM.

Fig. 23: 2-Stage Tankstat

ATTACH STAGE 1 CONNECTIONS

ON HEATER TO THE SINGLE STAGE

TANKSTAT AS SHOWN IN THE DIAGRAM ABOVE.

Fig. 24: Single-Stage Tankstat

24