Carrier AQUASNAP 30RB060-390 Spécifications télécharger pdf (Page 57)

DUAL CHILLER CONTROL OPTION — If the Dual Chiller

algorithm is used and the machines are installed in parallel, an

additional chilled water sensor must be installed for each

chiller. For 30RB315-390 units, a factory-supplied thermistor

and well are shipped in the control box of each. Install the well

in the common leaving water header. See Fig 34. Do not relo-

cate the chiller’s leaving water thermistors. They must remain

in place for the unit to operate properly.

For the non-modular units, an accessory kit, Part No.

00EFN900044000A, is available. This kit includes all parts

necessary for dual chiller control.

The thermistor well is a

in. NPT fitting for securing the

well in the piping. The piping must be drilled and tapped for

the well. Select a location that will allow for removal of the

thermistor without any restrictions. See Fig. 55 and 56.

Once the well is inserted, install the thermistors. Insert the

thermistor into the well until the O-ring reaches the well body.

Use the nut on the thermistor to secure the thermistor in place.

Once the thermistor is in place, it is recommended that a

thermistor wire loop be made and secured with a wire tie to the

chilled water pipe. This will aid in thermistor retention in the

well. See Fig. 55. Attach connector (part no. HY06AM016) to

thermistor lead. Plug connector into MBB J6-CH-3.

For 30RB315-390 units, as well as all units using the dual

chiller algorithm, a Carrier Comfort Network

(CCN) bus

must be connected between the two modules. See the

Carrier Comfort Network Communication Bus Wiring section

on page 66 for additional information.

WIRE TIE

LOOP

THERMISTOR WIRE

AND SECURE

TO CHILLED WATER PIPE

INSERT THERMISTOR UNTIL

O-RING MEETS THE

THERMISTOR WELL BODY.

Fig. 55 — Dual Leaving Water Thermistor

(Part No. 30RB660036)

5/8 in. HEX

6" MINIMUM

CLEARANCE FOR

THERMISTOR

REMOVAL

1.188 in.

2.315 in.

1/4-18 NPT

Fig. 56 — Dual Leaving Water Thermistor Well (Part No. 00PPG000008000A)

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 71 72

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Carrier AQUASNAP 30RB060-390 Spécifications Page 57

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