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Menu Driven Display 
2 Heat / 2 Cool

Terminal Designations

Specifications

Electrical rating: 

24 Volt AC (18-30 VAC)

1 amp maximum load per terminal (relay outputs)
4 amp total maximum load (all terminals combined)

Temperature control range: 

45˚- 90˚F (7˚- 32˚C)

Accuracy: 

+/-1.0˚F (+/-0.5˚C)

Power Source:

24 VAC

Auto Changeover deadband: 

Selectable 2˚ to 8˚F

Temporary temperature override: 

3 hour maximum or next setpoint

Remote sensor capable: 

1 indoor and 1 outdoor sensor

System configurations: 

Multi-stage heat pumps

Terminations: 

R, E, Y1, B, W2, Y2, L, O, G, C, IS, OS, H

Other Multi-Stage
Heat Pump Thermostats

9720i:

Programmable, 7 Day

9620:

Programmable, 7 Day

9420:

Non-Programmable

Shipping Information

Indiv. Ctn. Dim.: 

6.625" x 4.25" x 1.625"

Master Ctn. Qty.: 

6

Master Ctn. Dim.: 

9.25" x 5.625" x 7.5"

Master Ctn. Cu. Ft.: 

.23

Master Ctn. Wt.: 

3.5 lbs.

Max. Pallet Qty.: 

1260

Max. Pallet Wt.: 

785 lbs.

Optional Sensors: 

REMOTE INDOOR
REMOTE OUTDOOR

Distributed by:

Remote

Outdoor 

Sensor

Remote

Indoor

Sensor

24 VAC

Common

Compressor

Relay

(Stage 1)

Heat Active

Reversing

Valve

Emergency

Heating

Relay

Cool Active

Reversing

Valve

24 VAC

Transformer

Fan

Relay

OS

IS

C

Y1

B

O

Auxiliary

Heating

Relay

(Stage 2)

W2

System

Malfunction

L

R

Cooling

Relay

(Stage 2)

Y2

Humidity

Relay

H

G

PC8900

P374-1100, THERMIDISTAT

THE ROBERTSHAW

REPLACES:

®

9020

i

9025

i

Item 9020i and 9025i Remote Sensors

Indiv. Ctn. Dim.: 

2.625" x 1.5625" x 4.4375"

Master Ctn. Qty.: 

6

Master Ctn. Dim.: 

5.625" x 5.125" x 5.125"

Master Ctn. Cu. Ft.

: .09

Master Ctn. Wt.:

.78 lbs

.

H

HEAT PUMP

DELUXE 

PROGRAMMABLE

THERMOSTAT

9820

i

Climate Controls Americas
515 South Promenade Avenue
Corona  California  92879-1736  USA
Tel1 800 304 6563  Fac1 800 426 0804
Outside the USA +1 630 260 3402
Patents Pending  www.icca.invensys.com
©2003 Climate Controls Americas 8/03 - #150-1709

Feature Comparison

Robertshaw Honeywell, Inc.

Carrier Corp.

9820i

PC8900

THERMIDISTAT

Manual Override

X

X

X

EEPROM

X

X

X

Compressor Short Cycle Protection

X

X

X

7 Day Programming

X

X

X

Resume

X

X

X

Auto Changeover

X

X

X

Line Powered

X

X

X

Programmable Fan

X

X

X

O & B Terminals

X

X

Partial

˚F and ˚C

X

X

X

Status Indicators

X

X

X

Adjustable Differential

X

X

X

Gas/Electric

X

X

X

Energy Efficient Recovery

X

X

X

Manual Humidity Control

X

X

X

Automatic Humidity Control
based on Outdoor Temperature

X

X

X

Pre-Set Program

X

X

X

4 Hour Reserve

X

X

X

Events / day

2, 4, 6

4

4

Hidden Service Level

X

X

X

Remote Outdoor Sensor

X

X

X

Security Key Pad

X

X

X

Vacation Setting

X

X

X

Air Filter Monitor

X

X

X

12 or 24 Hour

X

X

Condensation Control

X

X

Remote Indoor Sensor

X

X

Large Display

X

X

Back Lighting

X

X

Service Interval Reminders

X

5/2 Day Programming

X

Adjustable Residual Cooling

X

1/2 Degree Resolution

X

Menu Driven (Ease of Programming)

X

24 Hr. Programming

X

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