Carrier 62X Series - Comefri Electronic Cometer; Fig. 79 - Comefri Electronic Cometer; Fig. 80 - Blower K-Factors; Hot Water Heating Control

50
Fig. 79 — Comefri Electronic Cometer
The basic instructions for setting up a Comefri
1
Electronic Com-
eter to display the correct CFM and output are as follows:
0-10VDC to OEM controller (See Fig. 79 and 80.)
1. Set Dip Switch #3 in on Position enables flow monitoring.
2. Look up the type and size of the specific blower in Fig. 80.
3. Please note that PR series units use ANPA blowers for “Air-
foil” blowers and ANPL blowers for backwards inclined
“BI” blowers.
4. Press the “OK” switch to access the “Flow Rate”. Using the
“UP” and “DOWN” buttons set the “Flow Rate” to 1000,
3000, 5000, 9999, or 30.00 based on the CFM of the blower.
Press “OK”. This figure must match maximum AMS range
on the “AMS SETTINGS” screen of the OEM.
5. Use the “Up” and “Down” buttons to set the first digit of the
Blower Types K-factor. Press “OK”.
6. Use the “Up” and “Down” buttons to set the second digit of
the Blower Types K-factor. Press “OK”.
7. Use the “Up” and “Down” buttons to set the third digit of the
Blower Types K-factor. Press “OK”.
8. Use the “Up” and “Down” buttons to set the fourth digit of
the Blower Types K-factor. Press “OK”.
9. Use the “Up” and “Down” buttons to set the place value of
the “.”. Press “OK”.
10. The Cometer should now be set.
11. Place label near Cometer that states “K-factor may require
adjustment during test and balance.”
12. Field calibration can be achieved by adjusting the K-factor
upwards or downwards as needed to match test and balance.
ANPA BLOWERS ARE USED AS BACKWARDS INCLINED
“BI” BLOWERS ON PR UNITS
Fig. 80 — Blower K-Factors
Hot Water Heating Control
The control valve for units equipped with hot water coils is to be
field provided and installed. The control valve will also require
field provided power (not from unit). The control signal for the
control valve will be provided by the OEM controller by wiring
the valve input signal to UO-6 (0 to 10V signal). Valve selection is
to be determined by power requirements, pipe size, and water flow
and temperature.
Digital Scroll Compressor
62X units (3-18 tons) have a digital scroll compressor. Two-stage
units (10-18 tons) will have a digital scroll compressor on the lead
circuit and a fixed speed scroll compressor, with hot gas bypass,
on the second circuit. The digital compressor's capacity is
1. Comefri is a registered trademark of Comefri Group.
1234
J1
24 VAC
0-10VDC
0-20 mA
COM
J2
SW2
SW3
SW1
12
3
Green LED
Yellow LED
Pressure
Connecon
-
+
Range Up
Range Down
Enter OK
CFM
88.88
0843P-0593
ANPA Blowers K-Factor ANPL Blowers K-Factor
ANPA 12 76.74 ANPL 10 37.30
ANPA14 101.82 ANPL 11 45.48
ANPA 16 131.45 ANPL 12 56.28
ANPA 18 145.89 ANPL 14 75.91
ANPA 20 196.80 ANPL 16 105.36
ANPA 22 249.99 ANPL 18 135.13
ANPA 25 313.82 ANPL 20 165.56
ANPA 28 423.99 ANPL 22 203.52
ANPA 32 518.98 ANPL 25 264.70
ANPA 36 667.15 ANPL 28 345.20
ANPA 40 864.71 ANPL 32 429.61
ANPA 44 974.88 ANPL 36 531.05
ANPA 49 1271.22 ANPL 40 651.78
ANPA 55 1594.92 ANPL 44 814.89
ANPL 49 941.62
ANPL 55 1180.64
-Factor Example for a THLZ 250
Blower with Comfri supplied
K-Factor of 173.75
173.3
5000
0962I-4912 Rev.D
Cometer Setup
06/26/2017
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DWG____ CHK____
LWF JW