Robertshaw DSL-520P User Manual

Installation

&

Operating Instructions

for

DSL-520P

COMMUNICATING ZONE

THERMOSTAT

TABLE OF CONTENTS

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Optional Features and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SL-IDS Remote Indoor Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Perimeter Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

THERMOSTAT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Reassembling the Thermostat to the Installed Backplate . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Temperature Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Thermostat Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Dampers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Wiring Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Current Limited Output Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SETTING YOUR THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

MODE Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

FAN Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

OUTDOOR Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

ZONE Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Changing the Temperaure Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

°C or °F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

TABLE OF CONTENTS

12- or 24-Hour Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Local Temporary Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Keypad Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

IMPORTANT

READ THIS BOOKLET THOROUGHLY IN ORDER TO
UNDERSTAND ALL THE OPERATION FEATURES OF YOUR
ENVIRONMENTAL MODULE.

RECORD THE SERIAL NUMBER IN THE SPACE
PROVIDED.

SERIAL NUMBER

DATE OF INSTALLATION

1

DSL-520P ZONE THERMOSTAT

INTRODUCTION

The nonprogrammable DSL-520P zone thermostat is the exclusive thermostat used with the
SlimZone Premier (SZP) system. The system will not function with any other thermostat.

The DSL-520P is a fully communicating thermostat which is powered by the SZP control mod­ule and is constantly exchanging data with the control module to optimize control of the zoned
environment. It represents the most advanced solid-state, microprocessor temperature control
on the market today.

The thermostat has been designed to provide accurate control and display of room temperature,
and normally displays room temperature, mode of operation and whether cooling or heating is
currently on.

Your new thermostat uses an adaptive control routine, based on Fuzzy logic, to determine the
heating or cooling load of the area in which it is installed. The routine calculates the load by
evaluating recent room conditions (from the sensor within the thermostat or connected remote

) and reactions to heating and cooling. The load factor is then used to determine when

sensor
your equipment should be activated and for how long, providing optimum control and econo-

my.

2

The SZP system uses 7 day programmability with 2 or 4 events per day. Programming is done
at the SZP control module only. The DSL-520P thermostat provides the ability to temporarily
deviate from the established program by simply pressing the

✞ or ✟ buttons to change the tem-

perature setpoints. In addition, you may choose to display the temperature in °F or °C.
The thermostat also allows you to select constant fan operation (useful when using an air clean-

er) or have the fan activated automatically when the heating or cooling equipment is energized.

FEATURES

* Nonprogrammable (programming is done at the SZP control module)
* Powered by the SZP control module (no separate transformer required)
* User friendly keypad providing access to system parameters such as fan control (FAN),

mode of operation (MODE), outdoor temperature (OUTDOOR) and zone identification

(ZONE)
* Selectable Celsius or Fahrenheit temperature display
* Selectable 12 or 24 hour clock display
* Constant fan or automatic fan operation
* Internal switch to lock-out the keypad to prevent tampering
* No batteries required — always remembers the fan setting and mode of operation (all other

parameters remembered by SZP control module)
* 2°F (1°C) minimum heat/cool separation
* Minimum call time (2 or 4 minute, selectable)
* Dry contact relay output for perimeter heat with LED indicator
* Lockable access cover

3

1. Outdoor Remote Sensor

2. Heating (Flame %), Cooling (Snowflake ☛)

3. Days of the week

4. MODE button (Toggles between Heat, Cool, Auto, Off)

5. Temporary Override

6. FAN button (Toggles between Constant or Automatic
Fan)

7. Communication Link established

8. Perimeter Heat LED

9. Room Temperature Display

10. Temperature Setpoint change

11. Events (Morning ✣, Day ✥, Evening ✤, Night ✠)

12. Time of day or Mode of Operation

13. OUTDOOR button (Displays outdoor temperature)

14. Keypad locked

15. ZONE button (Displays zone number of thermostat)

16. Fan

17. ✟✞buttons (Raise or lower setpoint or toggle
between ˚C or ˚F when pressed simultaneously)

1. Perimeter Heat LED

2. Date Code & Model Number

3. DIP Switch

4. Printed circuit board

5. Thermistor: measures room temperature

DSL-520P USER INTERFACE, LED AND SWITCHES

4

COMMUNICATION

The thermostat and the SZP control module are in constant communication with each other at
1200 baud using a RS485 interface. The satellite dish symbol

✬ will appear in the lower left-

hand corner of the display when the units are communicating properly. During communica­tion the uplink symbol (

✭

) will flash randomly. The satellite dish symbol ✬ disappears if the
DSL-520P loses communication with the SZP control module. The thermostat receives the
following operating parameters from the control module:

- temperature setpoint values

- morning, day, evening, and night event schedules

- time of day and outdoor temperature value

OPTIONAL FEATURES AND EQUIPMENT

The following are some of the options available for your electronic thermostat to further
enhance and expand its capabilities. The following are descriptions only. Refer to the instruc­tions provided with these components for wiring information.

SL-IDS REMOTE INDOOR TEMPERATURE SENSOR

The Robertshaw remote indoor sensor (SL-IDS) is easy to install and provides accurate digital
communication of room temperature to the controlling thermostat from up to 300 feet (90m),
using 3-wire, 18-24 AWG unshielded copper cable wired directly to the thermostat (RS2, RS1,
and RS+V). There are no switches to set. The thermostat detects the remote sensor connection

5