DSC HS-EMS500 User manual

Introduction
The HS-EMS500 is a 2 Heat / 2 Cool / Emergency Heat Electronic Digital
Communicating Non-programmable Thermostat designed for control of dual
compressor Heat Pumps. It features an easy-to-read vertical LCD that dis-
plays the current temperature and complete operation status. A direct wire,
easy-to-install backplate mounts on a standard vertical outlet box or any dry-
wall surface using the anchors and hardware provided.
This thermostat is designed to accept up to 6 indoor remote temperature sen-
sors (HS-EMS-ITS) or 5 indoor and 1 outdoor (HS-EMS-OTS) remote tem-
perature sensors. When indoor sensors are connected to the thermostat, the
temperature sensor (thermistor) on the thermostat is disabled. For tempera-
ture averaging at least two HS-EMS-ITS indoor remote sensors are required.
For additional information and wiring diagram for remote temperature sen-
sors, refer to the Installation Instructions included with the sensors.
The HS-EMS500 connects to an Escort/VPM5580TC, allowing the user to
change temperature settings through premise or remote touch tone tele-
phones. The Escort/VPM5580TC can announce the indoor temperature and
if an HS-EMS-OTS is connected, the outdoor temperature as well. Compati-
ble LCD keypads can also display the temperature and allow the user to
access the temperature controls (requires LCD5500 v2.1 or higher).
For information on thermostat access and control using the Escort/
VPM5580TC, please refer to the Installation Instructions included with the
Escort/VPM.
Location
For accurate temperature detection, the thermostat should be mounted on an
inside wall, 46 cm (18”) from any outside wall, in a frequently occupied area
with freely circulating air. It should be approximately 1.5 m (5’) above the
floor. Avoid direct sunlight, radiant heat from appliances, air conditioner
grills, stairwells, water pipes, warm air stacks, and sources of electrical inter-
ference such as arcing relay contacts.
Pre-Wiring
The HS-EMS500 requires a 7 conductor wire when connected to a multi-
stage heating and cooling system plus an additional 3 conductor wire when
connected to a security system through an Escort or VPM module.
Installation
1. Remove the thermostat cover. Insert a flat blade screwdriver, approxi-
mately 3 mm (1/8”) into the slot located in the bottom center of the
case. Twist ¼ turn to pop the thermostat loose from the backplate.
2. Swing the thermostat out from the bottom (hinge at top) and lift the
thermostat up and off the backplate.
3. Place the backplate opening over the control wires protruding from the
wall. Use the backplate to mark the location of two mounting holes.
4. Drill two 5 mm (3/16”) mounting holes at the marked locations. Tap the
supplied nylon anchors flush to the wall and fasten the backplate using
the supplied screws. Do not over tighten.
5. Connect the control wires to the thermostat as shown in the appropriate
wiring diagram. Push any slack wire back into wall. Ensure that the
wires are flush with the backplate. Seal the access hole to prevent
drafts from affecting thermostat performance.
6. Install optional setback and indoor/outdoor remote sensors, if used.
7. Replace the thermostat by inserting the tabs into the hinge slots at the
top of the backplate. Gently swing the thermostat downward and snap
it into place.
8. Replace the thermostat cover.
Thermistor Position
When placing the front cover on the thermostat, ensure that the thermistor is
not touching the case. The thermistor should be placed horizontal to the wall
and visible between the ribs of the case.
Thermostat Cover Lock
Insert the plastic lock piece into the bottom of the mounted base. The ends of
the lock piece fit snugly under the lock pins extending from the bottom of the
mounted base. The tab in the middle of the lock piece extends down from the
base. To release the locking mechanism, press the lock piece up and into the
base while gently prying open.
DIP Switch Settings and Functions
The DIP switches are located on the interior of the thermostat and can be set
in either the ON or OFF position depending on the installation. The default
positions are indicated in bold.
1. Normal or Add-On Heat Pump In the normal position the thermostat
will allow the compressor and the emergency heat to be on at the same
time. In the add-on position, the compressor is turned off with a call for
emergency heat.
2. Not Used This switch must remain in the OFF position.
3. 2 Minute or 4 Minute ON Times This option allows you to select
either a 2 or 4 minute minimum off and on time.
4. Keypad Lock In the ON position, all buttons are locked out except the
OUTDOOR Temperature button to prevent tampering. If the keypad is
locked, the day setpoint may be overridden for 1 hour by ±3°C or ±6°F
by pressing the or buttons.
5. Economy or Comfort In the OFF/Economy position, the thermostat
will not allow the equipment to forced on with a change in setpoint. In
the ON/Comfort position, the equipment will turn on immediately with
a change in setpoint.
6. Single or Multi-stage Set to OFF for 1 compressor stage of heating or
cooling (single stage) or ON for 2 compressor stages of heating and/or
cooling (multi-stage).
7. LED 1 + Indication In the OFF position, LED 1 will light when the ter-
minal is energized. In the ON position, LED 1 will light and a Filter
icon will be displayed on the LCD when the terminal is energized.
8. LED 2 + Indication In the OFF position, LED 1 will light when the ter-
minal is energized. In the ON position, LED 2 will light and a Fault
icon will be displayed on the LCD when the terminal is energized.
Specifications
Rated Voltage............................................................................. 20-30 VAC, 24 VAC nominal
Rated AC........................................ 0.05-0.75 A continuous/output (surges to 3.00 A, max.)
Rated DC @ ‘R’ ............................ 0.00-0.75 A continuous/output (surges to 3.00 A, max.)
Control range: Heating................................5-30°C in (1° steps); or 38-88°F (in 1° steps)
Cooling........................... 16-40°C in (1° steps); or 60-108°F (in 1° steps)
Measurement range.................................................................................0-48°C; or 28-124°F
ODT Measurement range ......................................................... –48 to 47°C; or –50 to 119°F
Minimum deadband............................................ (between heating and cooling) 1°C; or 2°F
NOTE: This thermostat contains electronic circuitry that replaces the con-
ventional mechanical anticipator.
DIP Switch DIP Switch OFF DIP Switch ON
1Normal Add on
2Not used (OFF) Not used
34 Minute Min ON 2 Minute Min ON
4Keypad Unlock Keypad Lock
5Economy Comfort
6Single stage Multi-stage
7LED 1 + No Icon LED 1 + Filter Icon
8LED 2 + No Icon LED 2 + Fault Icon
HS-EMS500
2-Compressor Heat Pump Thermostat
Installation Instructions
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Fig 2. Powering an HS-EMS500 Thermostat with a Stand-alone Transformer
Fig 1. Wiring Diagram for One Heating/Cooling System with One HS-EMS500 Thermostat
Warning! Do not remove the internal jumper (shunt). Connect to O or B terminal as
specified by equipment. Do not connect to both O and B terminals.
Thermistor Temperature Sensor
HS-EMS500
W1
Y1
G
R
24V
24V(c)
CLK1
CLK2
RS2
RS1
RS+V
X1
X2
R/24V shunt. Remove if
thermostat power is not
supplied by equipment.
Free Light / LED1Free Light / LED2
O
LED2
LED1
DIP SW7
DIP SW8
Display
B
Emergency Heat LED
(Center)
Y2
Escort5580TC/
VPM5580TC
X 1
X 2
RS + V
X 2
X 1
RS + V
RS1
RS2
CLK1
CLK2
24V(c)
24V
R
G
W1
Y1
24V(c)
24V
G
W1
Y1
Auxiliary Heat
Compressor 1
Fan
Power - Hot
Power - Common
Heat Pump
System
HS-EMS500
(Backplate)
LED1
LED2
OO
Reversing Valve - Cool Mode
BReversing Valve - Heat Mode B
Y2
Compressor 2
Y2
Output Terminal Functions
LED1................. Free light for status or function indication.
LED2................. Free light for status or function indication.
CLK1................. Use with dry contact relay for alternate set points.
CLK2................. Use with dry contact relay for alternate set points.
RS2.................... To Outdoor/Indoor remote sensors.
RS1.................... To Outdoor/Indoor remote sensors.
RS+V................. To Outdoor/Indoor remote sensors and
to Escort5580TC/VPM5580TC.
X2...................... To Escort5580TC/VPM5580TC.
X1...................... To Escort5580TC/VPM5580TC.
Y2 ...................... Compressor is energized for 2nd stage heating or cooling if
multi-stage is selected.
W1 ..................... Auxiliary heat is energized as back-up or emergency heat.
Y1 ...................... Compressor is energized with a call for heating or cooling.
G ........................ Fan is energized with a call for heating or cooling or by press-
ing the fan button.
R ........................ Independent switching voltage.
24V .................... 24 VAC Hot from equipment transformer.
24V(C) ............... 24 VAC Common from equipment transformer.
O ........................ Energizes the reversing valve continuously in cool mode.
B ........................ Energizes the reversing valve continuously in heat or off mode.
Warning! Remove the internal jumper (shunt) before connecting the stand-alone transformer.
Connect to O or B terminal as specified by equipment. Do NOT connect to both O and B terminals
Escort5580TC/
VPM5580TC
X 1
X 2
RS + V
X 2
X 1
RS + V
RS1
RS2
CLK1
CLK2
24V(c)
24V
R
G
W1
Y1
24V(c)
24V
G
W1
Y1
Auxiliary Heat
Compressor 1
Fan
Heat Pump
System
HS-EMS500
(Backplate)
LED1
LED2
OO
Line Voltage
Common
Hot
24V
AC
Transformer
BB
Reversing Valve - Cool Mode
Reversing Valve - Heat Mode
Y2 Y2
Compressor 2
Escort5580TC/
VPM5580TC
X 1
X 2
RS + V
X 2
X 1
RS + V
RS1
RS2
CLK1
CLK2
24V(c)
24V
R
G
W1
Y1
24V(c)
24V
G
W1
Y1
Auxiliary Heat
Compressor 1
Fan
Heat Pump
System
HS-EMS500
(Backplate)
LED1
LED2
OO
Line Voltage
Common
Hot
24V
AC
Transformer
BB
Reversing Valve - Cool Mode
Reversing Valve - Heat Mode
Y2 Y2
Compressor 2
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Escort5580TC/
VPM5580TC
X 1
X 2
RS + V
X 2
X 1
RS + V
RS1
RS2
CLK1
CLK2
24V(c)
24V
R
G
W1
Y1
24V(c)
24V
G
W1
Y1
Auxiliary Heat
Compressor 1
Fan
Power - Hot
Power - Common
Heat Pump
System #1
HS-EMS500 #1
(Backplate)
LED1
LED2
X 2
X 1
RS + V
RS1
RS2
CLK1
CLK2
24V(c)
24V
R
G
W1
Y1
24V(c)
24V
G
W1
Y1
Auxiliary Heat
Compressor 1
Fan
Power - Hot
Power - Common
Heat Pump
System #2
HS-EMS500 #2
(Backplate)
LED1
LED2
OO
To X2 terminal on Thermostat 3# and #4
To X1 terminal on Thermostat 3# and #4
OO
Reversing Valve - Cool Mode
BReversing Valve - Heat Mode B
BB
Reversing Valve - Cool Mode
Reversing Valve - Heat Mode
Y2 Y2
Compressor 2
Y2 Y2
Compressor 2
Warning! Connect Escort/VPM RS+V to first thermostat only. Do not remove the internal jumper (shunt).
Connect to O or B terminal as specified by equipment. Do NOT connect to both O and B terminals.
Fig 3. Wiring Diagram for Multiple Heating/Cooling Systems with Multiple HS-EMS500 Thermostats
Warranty
Digital Security Controls Ltd. warrants that for a period of twelve months from
the date of purchase, the product shall be free of defects in material and workman-
ship under normal use and that in fulfilment of any breach of such warranty, Dig-
ital Security Controls Ltd. shall, at its option, repair or replace the defective
equipment upon return of the equipment to its repair depot. This warranty applies
only to defects in parts and workmanship and not to damage incurred in shipping
or handling, or damage due to causes beyond control of Digital Security Controls
Ltd. such as lightning, excessive voltage, mechanical shock, water damage, or
damage arising out of abuse, alteration or improper application of the equipment.
The foregoing warranty shall apply only to the original purchaser, and is and shall
be in lieu of any and all other warranties, whether express or implied and of all
other obligations or liabilities on the part of Digital Security Controls Ltd. This
warranty contains the entire warranty. Digital Security Controls Ltd. neither
assumes repsonsibility for, nor authorizes any other person purporting to act on its
behalf to modify or to change this warranty, nor to assume for it any other war-
ranty or liability concerning this product.
In no event shall Digital Security Controls Ltd. be liable for any direct, indirect or
consequential damages, loss of anticipated profits, loss of time or any other losses
incurred by the buyer in connection with the purchase, installation, operation or
failure of this product.
WARNING: DSC Ltd. recommends that the entire system be completely tested
on a regular basis. However, despite frequent testing, and due to but not limited
to, criminal tampering or electrical disruption, it is possible for this product to
fail to perform as expected.
FCC COMPLIANCE STATEMENT
CAUTION: Changes or modifications not expressly approved by Digital Security
Controls Ltd. could void your authority to use this equipment.
This equipment generates and uses radio frequency energy and if not installed and
used properly, in strict accordance with the manufacturer’s instructions, may cause
interference to radio and television reception. It has been type tested and found to
comply with the limits for Class B device in accordance with the specifications in
Subpart “B” of Part 15 of FCC Rules, which are designed to provide reasonable pro-
tection against such interference in any residential installation. However, there is no
guarantee that interference will not occur in a particular installation. If this equip-
ment does cause interference to television or radio reception, which can be deter-
mined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
•Re-orient the receiving antenna
•Relocate the alarm control with respect to the receiver
•Move the alarm control away from the receiver
•Connect the alarm control into a different outlet so that alarm control and
receiver are on different circuits.
If necessary, the user should consult the dealer or an experienced radio/television
technician for additional suggestions. The user may find the following booklet pre-
pared by the FCC helpful: “How to Identify and Resolve Radio/Television Interfer-
ence Problems”. This booklet is available from the U.S. Government Printing Office,
Washington, D.C. 20402, Stock # 004-000-00345-4.
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© 2002 Digital Security Controls Ltd.
1-800-387-3630 • www.dsc.com
Printed in Canada 29034523 R001
Direct all comments concerning this
publication to [e-mail]
Operating Instructions
Introduction
The HS-EMS500 Digital Communicating Thermostat is designed to provide
accurate control and display of room temperature. The thermostat normally
displays room temperature, mode of operation (i.e. Day or Night), and
whether Cooling or Heating is currently on. The six buttons on the front of
the unit allow complete control of the thermostat. You may specify different
Heating and Cooling setpoints, and change them easily by pushing a button.
Temperature can be displayed in either °C or °F. The thermostat also allows
you to select either continuous fan operation, or fan operation only during
operation of the heating/cooling device(s).
Modes of Operation
Select the desired mode of operation by toggling the MODE button:
—indicates Cooling system only. “COOL” is displayed for 5 seconds.
—indicates Heating system only. “HEAT” is displayed for 5 seconds.
—indicates both the Heating and Cooling (automatic). “AUTO” is
displayed for 5 seconds).
(flashing)—indicates Cool is ON.
(flashing)—indicates Heat is ON.
Eht - indicates Emergency Heat.
OFF—shuts off thermostat. Heating and Cooling systems will not operate.
Fan operation is still possible.
Caution: Avoid using the OFF mode during cold weather to prevent dam-
age from freezing.
❄
❄
❄
Temperature Control
Cooling:
Select the temperature you want the thermostat to maintain while in Cool
mode, press the mode button until Cool mode is selected, then press the
or buttons until the desired temperature is displayed. The cooling setpoint
temperature is displayed for 5 seconds.
Heating:
Select the temperature you want the thermostat to maintain while in Heat
mode, press the mode button until Heat mode is selected, then press the
or buttons until the desired temperature is displayed. The heating setpoint
temperature is displayed for 5 seconds.
Auto:
The thermostat will automatically switch from heating to cooling as deter-
mined by the selected setpoints in heating and cooling.
NOTE: The thermostat will not allow less than 1 C (2 F) difference
between the heating and cooling setpoints.
Fan Control
The Fan will come on automatically when the system is operating, but there
is no indication of this on the display. To select continuous Fan operation,
press the FAN button and the display will show . This is recommended
for electronic air cleaners and continuous ventilation requirements.
Outdoor (ODT) Button
When the outdoor temperature sensor option is connected to your thermo-
stat, you can display the current outdoor temperature by pressing the button.
If this option is not connected, the thermostat will display _ _ with no
numbers.
Emergency Heat Indication
The center LED at the top of the thermostat lights when the system calls for
Emergency (Auxiliary) Heat.
Day/Night Button
The Day/Night button is used to select the Occupancy setting. When first
installed, the thermostat is set to Day occupancy setting and the display will
show the symbol and the Day temperature. By pressing the Day/Night
button you can change to the Night occupancy setting and the display will
show the symbol and the night temperature. This button can be used to
toggle between Day and Night modes. Within each mode the temperature
can be modified. The thermostat will remember any new settings.
Celsius/Fahrenheit
Simultaneously press and to toggle between Celsius ( C) and Fahren-
heit ( F) temperature display.
Optional Indoor/Outdoor Remote Sensors
The thermostat can accept indoor and outdoor remote temperature sensors
(EMS-ITS and EMS-OTS) for monitoring of temperatures where these sen-
sors are located.
Connecting indoor sensors disables the temperature sensor on the thermostat
thereby increasing the flexibility of where the thermostat can be located. For
temperature averaging over a large area a minimum of two indoor sensors
are required.
Indoor and outdoor sensors are available separately. For more details about
installing these sensors, please refer to the Installation Instructions included
with the sensors.
Temperature Accuracy
Full accuracy is only achieved after the thermostat has been installed and
powered for at least one hour.
Power Failures
No battery is required to maintain the temperature setpoints in the case of a
power loss, regardless of duration.
❄
❄
HS-EMS500
2-Compressor Heat Pump Thermostat
Mode
Fan
Outdoor
Day/Night
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