Raypak 302B-902B User Manual

Page 24

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 Pool and Closed-Loop Water-Source Heat

Pump applications, your heater should be config-

ured 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 902B, 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.

21 and 22. 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. 23.

Heater must be electrically grounded in accordance

with the NEC, and CSA C22.1 C.E.C. Part 1 in

Canada.

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.

Fig. 22: 2-Stage Tankstat

DANGER: SHOCK HAZARD

Make sure electrical power to the heater is discon-

nected to avoid potential serious injury or damage to

components.

Fig. 21: Wiring Connections