Rheem Raypak Delta Limited 399B, Installation And Operation Manual

Page: 24 / 67

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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. 24: 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. 25: 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 heat-
er 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 heat -
er 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 heat -
er to stage 2 of the control, as shown in Fig. 23 and
Fig. 26. 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 temperature 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.
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. 27.
Heater must be electrically grounded in accordance
with the NEC, and CSA C22.1 C.E.C. Part 1 in Can-
ada.