Carrier HH99ZZ019, Service Instructions Manual

Page: 2 / 8

2
Check Package Contents
Remove accessory packaging and inspect shipment for dam-
age. If any damage is found, file a claim with the shipping
agent immediately. If any item is missing or any part does not
assemble properly, notify your Carrier distributor. Table 2 lists
the accessory package contents.
*Do not use the electrical harness provided in this kit for 48/50N, 48/
50P and 48/50Z units.
INSTALLATION
48/50A Units
The CO
2
sensor is to be installed in the predrilled holes located
above the auxiliary control box (see Fig. 2).
1. Shut off unit power supply.
2. Open the hinged auxiliary control box access door and
secure.
3. Remove the sensor and cover from the sensor mounting
plate.
4. Secure mounting plate to bracket (48/50A) with no. 8
screws (see Fig. 3).
5. Wire the electrical harness to the sensor as shown in
Fig. 3 and 4.
6. Remove the blankout plate from the partition, just above
the auxiliary control box.
7. Attach the sensor to the mounting plate.
8. Mount the bracket to the partition using 2 sheet metal
screws (see view F in Fig. 2).
9. Connect the electrical harness (PL18).
48/50P and 48/50Z Units
The CO
2
sensor is to be installed in the predrilled holes located
in the power exhaust section. See Fig. 5-11.
1. Shut off unit power supply.
2. Open the power exhaust section doors/panels to gain
access.
3. Remove the sensor and cover from the sensor mounting
plate.
4. Secure mounting plate to the bracket with no. 8 screws.
5. The electrical wire harness for the CO
2
sensor is factory
installed. Locate the four wires in the power exhaust
section. Wire the electrical harness to the sensor as
shown in Fig. 4.
6. Attach the sensor to the mounting plate.
7. Mount the bracket to the appropriate location:
• Size 030-050 units with power exhaust, see Fig. 5 and 6.
• Size 030-050 units with economizer only, see Fig. 7.
• Size 030-050 units with no economizer or power ex-
haust, see Fig. 8.
• 48/50P055-100 and 48/50Z055-105 units with power ex-
haust, see Fig. 9.
• 48/50P055-100 and 48/50Z055-105 units with econo-
mizer only, see Fig. 10.
• 48/50P055-100 and 48/50Z055-105 units with no econo-
mizer or power exhaust, see Fig. 11.
8. Restore power to unit.
Table 2 — Accessory Package Contents
ITEM QUANTITY
CO
2
Sensor (Part No. HH99ZZ019) 1
Bracket (48/50A) 1
No. 8-18 x 1 /
4
Screw 2
1 /
4
AB-14 x 5 /
8
Screw 2
Electrical Harness* 1
Bracket (48/50N,48/50P,48/50Z) 1