Raypak 399B-2339B Operations Instructions download pdf (Page 24)

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.

Fig. 23: 2-Stage Tankstat

SINGLE

STAGE

TANKSTAT

STAGE 1

CONNECTION

ATTACH STAGE 1 CONNECTIONS

ON HEATER TO THE SINGLE STAGE

TANKSTAT AS SHOWN IN THE DIAGRAM ABOVE.

Fig. 24: Single-Stage Tankstat

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.

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.

2-STAGE

TANKSTAT

STAGE 1

CONNECTION

STAGE 2 CONNECTION OR

STAGE 1 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.

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.

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Raypak 399B-2339B Operations Instructions Page 24

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