Robertshaw 9620 User manual

Important Safety Information

WARNING:

•Always turn off power at the main power source by unscrewing

fuse or switching circuit breaker to the off position before installing,

removing, cleaning, or servicing thermostat.

•Read all of the information in this manual before installing or

programming this thermostat.

•This is a 24V AC low voltage thermostat. Do not install on voltages

higher than 30V AC.

•All wiring must conform to local and national building and electrical

codes and ordinances.

•Do not short (jumper) across terminals on the gas valve or at the

system control to test installation. This will damage the thermostat

and void the warranty.

110-732E

7 Day Programmable

2 Heat / 2 Cool

INTEGRATED COMFORT SOLUTIONS

™

DIGITAL

PROGRAMMABLE

THERMOSTAT

9620

User’s Manual

Quick Start

Installation and

Programming

HEAT PUMP

As an ENERGY STAR®partner, Maple Chase has

determined that this thermostat product meets

the ENERGY STAR®guidelines for energy efficiency.

110-732E 7/18/01 3:04 PM Page 1

Features

• Four preprogrammed ENERGY STAR®setpoints for each day of the week

• Quickset™ programming for quickly programming all days of the

week simultaneously

• Energy Efficient Recovery (EER™)

• Residual cooling for added air conditioning efficiency

• Two AA ENERGIZER®brand batteries retain program memory,

even during power outages

• Low battery indicator

• Multi-colored LED indicators for system status

• Zone compatible as master thermostat

• Fahrenheit/Celsius display option

• Programmable from 45°F (7°C) to 90°F (32°C)

• Accuracy within ±1 degree

• Adjustable temperature differential: 1-3 degrees

• Maintains summer and winter programming

Step 1: Replacing Existing Thermostat

1. Turn off power to heating and cooling system.

2. Remove cover of old thermostat to expose wires. (Figure 1)

FIGURE 1

3. Disconnect wires one at a time from existing terminals. use

enclosed labels to mark existing wires. Refer to cross references in

Table 1 if existing wiring does not directly match the labels.

• If you have any questions about cross referencing the old terminal to

the new label, reference your equipment installation manual, a

licensed contractor, or call Robertshaw Tech Support (800) 445-8299.

4. Remove existing thermostat base from wall.

110-732E 7/18/01 3:04 PM Page 2

TABLE 1

Old Terminal New Label Description

R, V-VR or VR-R R 24 VAC

Y, Y1 or M Y1 Stage 1 Cooling/Heating Circuit

O or R O Reversing Valve (Cooling Mode)

B B Reversing Valve (Heating Mode)

G or F G Fan Contactor Circuit

Y2 Y2 2nd Stage Cooling Circuit

W1 or W2 or W-U W2 2nd Stage Heating Circuit

L or X L System Monitor LED

E E Emergency Heating Circuit

C, X or B C 24 VAC Transformer Common Side

NOTE: THIS THERMOSTAT REQUIRES A 24V AC COMMON WIRE FOR PROPER OPERATION.

5. After labeling wires, remove wires from terminals.

6. Remove existing thermostat base from wall.

7. Refer to the following section for instructions on how to

install thermostat.

Recycling Thermostat

If this thermostat is replacing a thermostat that contains mercury in a

sealed tube, do not place your old thermostat in the garbage. Contact your

local waste management authority for instructions regarding proper dis-

posal of the thermostat. If you have any questions, call Robertshaw tech-

nical support at 1-800-445-8299.

Step 2: Installing Model 9620 Thermostat

NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON INSIDE WALL, 4-5 FEET ABOVE THE FLOOR. DO NOT INSTALL

BEHIND A DOOR, IN A CORNER, NEAR AIR VENTS, IN DIRECT SUNLIGHT, OR NEAR ANY HEAT OR STEAM GENERATING FIX-

TURES. INSTALLATION AT THESE PLACES WILL AFFECT THERMOSTAT OPERATION.

IMPORTANT: THIS THERMOSTAT IS COMPATIBLE WITH 100% LOCKOUT SYSTEMS. TO RESET THE SYSTEM, TURN

THERMOSTAT TO OFF POSITION FOR AT LEAST 60 SECONDS.

1.Turn off power to the heating and cooling systems.

2. Place COOL-OFF-HEAT-EM in OFF position.

PROG

MAN

SET PROG/MAN COOL-OFF-HEAT-EM

AUX CHECK EMER

AUTO - ON

COOL-OFF-HEAT-EM

110-732E 7/18/01 3:04 PM Page 3

3. Place AUTO-ON switch into AUTO position.

4. Remove the cover using a coin or screwdriver (Figure 2).

FIGURE 2

5.Place thermostat against the wall at desired location. Make sure

wires will feed through opening on base of thermostat.

6. Mark placement of mounting holes (Figure 3). Set base aside.

FIGURE 3

7. Drill the marked holes using a 3/16" drill bit. NOTE: Enclosed plastic

anchors do not require a drilled hole for drywall.

8. Tap plastic anchors into the holes.

9. Align base with plastic anchors and feed wires through opening

(Figure 3).

PROG

MAN

FAN AUTO ON

COOL OFF HEAT EM

CHANGE SET PROG/MAN

AMAM

PMPM

MORN DAY EVE NITE EERMORN DAY EVE NITE EER

C L R

MOUNTING HOLES

WIRE OPENING

110-732E 7/18/01 3:04 PM Page 4

10. Secure base to wall with supplied screws.

11. Terminal screws are loosened. Insert wires into terminal strip

(Figure 4) matching the label to the corresponding terminal (see

Wiring Diagrams below). Tighten screws.

9620 WIRING SAMPLE #1

Y1 E G W2CLRY2

Typical heat pump with cool active reversing valve and auxiliary/emergency heat.

9620 WIRING SAMPLE #2

CLRY2Y1EGW2O

Typical heat pump with heat active reversing valve and auxiliary/emergency heat.

RY2

Jumper

9620 WIRING SAMPLE #3

BY1 E G W2CL O

Typical heat pump with heat active reversing valve and auxiliary/emergency heat.

Does not have separate wire for emergency heat (jump W2 & E).

9620 WIRING SAMPLE #4

CW2L R Y2 Y1 E G

Typical heat pump with cool active reversing valve, auxiliary/emergency heat

and second stage of cooling. System fault indicator connected (L terminal).

FIGURE 4

110-732E 7/18/01 3:04 PM Page 5

12. Install two AA ENERGIZER®brand batteries or equivalent into battery

compartment. Be sure to match positive (+) ends of batteries with

positive (+) battery terminals in the battery compartment.

13. Replace cover on thermostat by snapping into place.

14. Turn on power to system. Test thermostat as described in the

following section.

TERMINAL LEGEND - 9620

TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION

C 24VAC common connection Yes For input of 24VAC common

side of transformer

L System fault indicator connection No For connection of system

fault indicator (if present)

R 24VAC hot connection Yes For input of 24VAC hot side

of transformer

Y2 Second stage cooling connection No Energizes on a call for sec-

ond stage cooling

Y1 First stage compressor connection Yes Energizes on a call for first

stage heating or cooling

E Emergency heat connection No* Energizes on a call for heat

in the EM mode only

G Indoor fan connection Yes Energizes with E, Y1, Y2 and

W2 terminals or with FAN

option switched to the ON

position

W2 Second stage heat connection No* Energizes on a call for sec-

ond stage of heat (auxiliary

heat)

O Cool active reversing Yes** Energizes when in the in

valve connection COOL mode

B Heat active reversing Yes** Energizes when in the

valve connection HEAT or EM modes

* For systems using a backup heat source. If separate E terminal connection is not available,

jumper E and W2.

** Most heat pump systems will have a cool active OR a heat active reversing valve. Use the

appropriate terminal.

110-732E 7/18/01 3:05 PM Page 6

Step 3: Testing the Thermostat

WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS VALVE OR SYSTEM CONTROL

TO TEST OPERATION. THIS WILL DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.

CAUTION: DO NOT SWITCH SYSTEM TO COOL IF THE TEMPERATURE IS BELOW 50°F (10°C). THIS CAN DAMAGE

THE AIR CONDITIONING SYSTEM AND CAUSE PERSONAL INJURY.

1. Place the COOL-OFF-HEAT-EM

switch into the COOL position

2. Press the button until the temperature

setting is at least 3 degrees below the room temperature. The air

conditioning system should turn on within a few seconds.

NOTE: O

NCE THE THERMOSTAT TURNS THE SYSTEM OFF WHILE IN THE COOL OR HEAT MODE

A BUILT

IN DELAY KEEPS THE COM

PRESSOR FROM TURNING ON FOR ABOUT

MINUTES

. T

HIS PROTECTS THE COMPRESSOR

. N

O ADDITIONAL TIME DELAY RELAY

(

DELAY ON

BREAK

)

IS NECESSARY

. T

O OVERRIDE THE

MINUTE DELAY FOR INSTALLATION

PRESS

RESET. T

HIS WILL ERASE THE DELAY AS WELL

AS ALL PROGRAMMING

3. Put the COOL-OFF-HEAT-EM switch into

the OFF position. The air conditioning

system should turn off. The fan may

continue to run for a short period of time.

4. Put the COOL-OFF-HEAT-EM switch

into the HEAT position.

5. Press the button until the temperature setting is at least

3 degrees above room temperature. The heating system should turn

on. The fan may not turn on immediately, depending on the fan delay

built into the furnace.

6. Put the COOL-OFF-HEAT-EM switch

into the OFF position. The heating

system should turn off. Once again,

the fan may have a delay.

7. Put the AUTO-ON switch

to the ON position. The blower

fan should turn on.

8. Put the AUTO-ON switch

to the AUTO position. The blower

fan should turn off.

COOL-OFF-HEAT-EM

AUTO - ON

110-732E 7/18/01 3:05 PM Page 7

Step 4: Customizing Your Thermostat

◆Set Time of Day, Day of Week,

Temperature Differential,

Residual Cooling

1. Press SET and PROG/MAN.

Release simultaneously.

Press or to change time of day.

2. Press Press

to change day of week.

3. Press Press

to change 1st stage

temperature differential.

NOTE: THE TEMPERATURE DIFFERENTIAL IS FACTORY PRESET AT 1°. THIS MEANS THAT

WHENEVER THE ROOM TEMPERATURE CHANGES BY ONE FULL DEGREE FROM THE TEMPERA-

TURE SETTING, THE SYSTEM WILL TURN ON. IF THE SYSTEM TURNS ON TOO OFTEN,

INCREASE THE TEMPERATURE DIFFERENTIAL.

4. Press Press

to change 2nd stage

temperature differential.

NOTE: THE SECOND STAGE TEMPERATURE DIFFERENTIAL IS FACTORY PRESET AT 2°.

5. Press Press

to change

residual cooling.

NOTE: THE RESIDUAL COOL FEATURE WILL KEEP THE SYSTEM FAN ON FOR AN

ADDITIONAL 30, 60, OR 90 SECONDS AFTER THE COMPRESSOR CYCLES OFF IN COOL

MODE. THE RESIDUAL COOL FEATURE CAN BE SET ONLY IN THE COOL MODE.

PROG

MAN

SET PROG/MAN COOL-OFF-HEAT-EM

AUX CHECK EMER

AUTO - ON

SET PROG/MAN

SET P

1=MO

2=TU

3=WE

4=TH

5=FR

6=SA

7=SU

SET P

SET

110-732E 7/18/01 3:05 PM Page 8

◆Changing Fahrenheit (F) to Celsius (C)

Press and hold SET. Press

Release both simultaneously.

◆Energy Efficient Recovery (EER™)

The Energy Efficient Recovery (EER™) feature looks ahead up to 2 hours

prior to the end of the setback (or set-up) period to begin monitoring per-

formance and calculating when to turn on your system. It also determines

whether the auxiliary heat or cool stages should be activated prior to set-

point time to meet your chosen setpoint temperature. The thermostat will

indicate EER in the display when this program feature is active. The EER™

feature will lockout the auxiliary stages until 20 minutes prior to upcoming

setpoint time to utilize the most energy efficient first stage. The auxiliary

stages of heating and cooling will be available during this lock-out period

to maintain the setpoint temperature should the system not be able to

keep up with the heating or cooling demand.

Step 5: Setting the Program

This Robertshaw thermostat is preprogrammed with the following

ENERGY STAR®settings for the greatest energy savings.

Setting Time Heat Setpoint Cool Setpoint

Temperature Temperature

MORN 6:00 a.m. 70°F 78°F

DAY 8:00 a.m. 62°F 85°F

EVE 5:00 p.m. 70°F 78°F

NITE 10:00 p.m. 62°F 82°F

These settings can be customized using the following QuickSet™ or daily

programming guides.

SET P

110-732E 7/18/01 3:05 PM Page 9

◆QuickSet™ Programming Mode

QuickSet™ will program all 7 days of the week with the same program.

1. Place COOL-OFF-HEAT-EM

in COOL or HEAT position.

2. Press and hold SET. Press the button.

Release simultaneously.

3. The MORN indicator should be blinking. Program the time of day and

the temperature as outlined in the Setting Daily Program section.

◆Setting Daily Programming

1. Place COOL-OFF-HEAT-EM

in COOL position.

2. Press SET button. The display will

show a number from 1 to 7. This

number represents the day of the

week to be programmed. If pro-

gramming individual days, press

either or button to adjust

the day of the week to program.

3. Press SET. Press or to change

MORN time.

4. Press SET.

5. Press or to change

MORN temperature.

6. Repeat steps 2-5 for DAY, EVE, and NITE.

7. Repeat steps 2-6 above to program

any other day of the week.

8. Shift COOL-OFF-HEAT-EM to HEAT position.

9. Repeat steps 2-6 to program HEAT (winter) settings.

PROG

MAN

SET PROG/MAN COOL-OFF-HEAT-EM

AUX CHECK EMER

AUTO - ON

COOL-OFF-HEAT-EM

SET PR

PROG

MAN

SET PROG/MAN COOL-OFF-HEAT-EM

AUX CHECK EMER

AUTO - ON

SET PR

PROG

MAN

SET PROG/MAN COOL-OFF-HEAT-EM

AUX CHECK EMER

AUTO - ON

SET P

COOL-OFF-HEAT-EM

110-732E 7/18/01 3:05 PM Page 10

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