2
Fig. 1 — Accessory Thermistor Location (30RB Units Shown)
4. Insert the thermistors into the wells until the O-rings on the
thermistors reach the well body. Use the nut on the thermis-
tors to secure the thermistors in place.
It is recommended that a small amount of heat compound
(such as Dow Corning 340 Heat Sink Compound) be inserted
with the thermistor for better heat transfer.
5. Once the thermistors are in place, it is recommended that a
wire loop be made and secured with a wire tie to the chilled
water pipe. This will provide strain relief. See Fig. 3.
6. The wiring connector (part no. HY84EE004) comes attached
to the thermistor lead. Run connector wiring to the chiller
power box on the master and slave chillers. Plug the connec-
tors into Aux Board 1 (included in accessory kit and part of
installation) connector J6. See Fig. 6.
7. Install Aux Board 1 on right side of wall of power box, on the
mounting studs located below Aux Board 3. See Fig. 7. Dip
switch settings on Aux Board 1 (refer to Fig. 6 for location)
should be set as follows:
8. Install circuit breaker CB-4 inside power box on bracket as
shown in Fig. 8. Using wiring harness (part no.
00PPN500011200A), connect power from CB-4 to Aux
Board 1 (J1) at location shown in Fig. 6. Neatly route wiring
harness so wiring is protected from damage.
9. Using the accessory-supplied wiring harness (part no.
00PPN500011200A), connect the plug marked AUX1-J9 to
the J9 connection on Aux Board 1 (see Fig. 6). Connect the
other end of the harness to terminal blocks TB-P-1, TB-P-2,
and TB-P-3 in power box. Neatly route wiring harness so
wiring is protected from damage.
10. Restore power to unit.
11. Refer to the Controls, Start-Up, Operation, Service and Trou-
bleshooting guide for configuration information.
MASTER CHILLER
CONTROL
BOX
SLAVE CHILLER
PUMP AND CHECK VALVE
OR ISOLATION VALVE
DUAL CHILLER
LWT SENSORS
AND WELLS
PUMP AND CHECK VALVE
OR ISOLATION VALVE
LEGEND
NOTE: This is a simplified piping diagram — not all hydronic specialties are shown.
LWT
—
Leaving Water (Fluid) Temperature
Field Wiring
Field Communication Wiring
1
2
3
4
5
6
7
8
ON
OFF
=
S
WITCH LOCATION
a30-5938