Carrier 58MVP Manual

A SERVICE OF

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Appendix B

Isolation Circuits

THERMOSTAT

FURNACE

CONTROL

BOARD

K

1

K

1

K

2

K

2

OUTDOOR

UNIT

K

1

K

2

FIELD-SUPPLIED

24-VAC SPST RELAYS

R

W

Y

G

C

R

Y

/

Y2

W

/

W1

G

Com

Y

C

A95097

Fig. 5—Isolation of W/W1 and Y/Y2

Thermostat Circuits

THERMOSTAT FURNACE

CONTROL

BOARD

K

1

K

1

K

1



–FIELD-SUPPLIED

24-VAC SPST RELAY

R

W

Y

G

C

R

Y

/

Y2

W

/

W1

G

Com

C

Y

FIELD-SUPPLIED

24-VAC (40VA)

TRANSFORMER

120VAC

OUTDOOR

UNIT

A95098

Fig. 6—Isolation of Outdoor Unit with a Separate

24-v Supply

UNIT SIZE (BTUH)

HIGH-PRESSURE SWITCH LOW-PRESSURE SWITCH

Make Point Break Point Make Point Break Point

40,000 1.81 in. wc max 1.63 in. wc ± 0.05 0.75 in. wc max 0.60 in. wc ± 0.05

60,000

80,000

100,000

120,000

1.81 in. wc max 1.63 in. wc ± 0.05 0.95 in. wc max 0.80 in. wc ± 0.05

A95050

0-4 IN.

SLOPE GAGE

Appendix C

Pressure Check Diagram

36