Carrier 09FC020 - Modular Unit Series Piping (09 Fc050 - 080)

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Fig. 17 — Dual Chiller Accessory Kit Leaving Water Thermistor and Well (P/N 00EFN900044000A)
MODULAR UNIT SERIES PIPING (09FC050 - 080)
The modular unit sizes 050 - 080, have two piping systems. From
the factory they are separated for parallel piping in the field. For
low flow rates, less than 150 gpm per V section, the unit may need
to be converted to a series arrangement for improved performance.
This conversion requires joining the two unit connections in the
center of the unit. These are the leaving water connection for the
first circuit and the entering water connection of the second
circuit.
First step is to remove the insulation from these tees. Rotate the
tees at these locations so they point towards each other. Remove
the couplings holding the tees. Reorient the tees so they point to-
wards each other, see Fig. 22. Once the tees are reattached add the
joining pipe include in the Modular Piping Accessory (Part No.
09FC70000801). Attach with the existing couplings. Add insula-
tion back to the tees and joining pipe section.
Fig. 18 — 09FC 050-080 Parallel Piping
30XV 140, 160, 180, 225 Standard Tier, 140 Mid Tier
5/8 in. HEX
6 in. MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
1.188 in.
2.315 in.
1/4-18 NPT
WIRE TIE
LOOP
THERMISTOR WIRE
AND SECURE
TO CHILLED WATER PIPE
INSERT THERMISTOR UNTIL
O-RING MEETS THE
THERMISTOR WELL BODY.
09FC Unit
Chiller
LWT
(Note 2)
EWT
(Note 2)
36"
(Note 1)
09FC
Control
Panel
24" Min
(Note 3)
NOTES:
1. Allow 36 in. for fan VFD access. Verify 36 in. meets local codes.
2. EWT and LWT thermistors must be installed in the field.
Thermistors are supplied inside control panel. Add 1/4 in. NPT hole in pipe for mounting.
LWT thermistor well must be in mixed flow piping.
3. Minimum access is a recommendation. Local code may require increased spacing.
4. Chiller tube service must be done from control panel end for this arrangement. See chiller
certified drawings for details.