Verve VTST-LNV WiSPER Installation Manual

Installation Guide

VTST-LNV WiSPER Thermostat
Line Voltage

Application:

This thermostat is a line voltage heating and cooling digital temperature
control designed to operate either 2 or 4-pipe fan coil systems, but it
can also be configured to operate line voltage PTHP/PT
This thermostat also has the capability to receive and transmit to
EnOcean enabled wireless products. Please see programming
instructions for more details. Switching of load circuits is through relay
contacts (see specifications for applicable load ratings). The fan
cycles on/off with calls for heating or cooling or can be on continuously
in either low or high speed when configured as a heat pump or on
continuously in either low, medium or high speed when configured as
a fan coil. The control can be placed in economy mode or stop mode
with 40°F freeze protection. This thermostat operates at a single
setpoint with automatic changeover

Specifications:

mperature Monitor Range: 32.2°F to 99.9°F (0.0°C to 37.7°C)

Te
Setpoint Range: 60.0°F to 85.0°F (15.5°C to 29.5°C)
*Setpoint: 72.0°F (22.0°C)
*Comfort Limits: 65.0°F (18.5°C) cooling

85.0°F (29.5°C) heating

Display Format: Liquid Crystal Display (LCD)
Backlight: EL blue green
Sampling Rate: Every 15 seconds
Accuracy: ± 1°F (0.5°C)
Power Source: 120VAC to 277VAC (102 minimum to 304 maximum)
Load Rating:

1/4 HP 3 speed or 2 speed fan motors:

Voltage

1/4HP FLA

Heat/Cool

Pilot Duty

Single speed fan motors:

Voltage

1/6HP FLA

Heat/Cool

Pilot Duty

*Fan Control:
Fan Coil - Selectable: Auto cycle, Low, Medium, High, Economy, Stop
Heat Pump - Selectable: Auto cycle, Low, High, Economy, Stop
Heat/Cool Control:
Fan Coil: 1 heat and 1 cool circuit
Heat Pump: 2 heat and 1 cool circuit
*Economy Limits:

Maintains room temperature between 60.0°F and 85.0°F

(15.5°C and 29.5°C) when thermostat is in economy (ECON) mode

*Fan Purge Timer: 30 seconds
Anti-short Cycle: 3 minute hold in no call state at all times
*Cycle Rate:
Fan Coil: 8 cycles per hour
Heat Pump: 6 cycles per hour
* Differential: 0.4°F

Display Mode: Setpoint temperature

*
* System Function: Heat and Cool

*See Field Programming Instructions

120V

AC

5.8A

125VA

(1.0A)

120VAC

4.4A

240VA

(2.0A)

.

208VAC 220 - 240VAC

3.1A

125VA

(0.6A)

208VAC 220 - 240VAC

2.4A

240VA

(1.15A)

125VA

(0.52A)

240VA

(1.0A)

AC systems.

277VAC

2.4A2.9A

125VA

(0.45A)

277VAC

1.9A2.2A

240VA

(0.87A)

INSTALLATION:

This device should be installed and serviced by a qualified technician.

Mount this control ONLY

1. Caution: HIGH VOLTAGE - Disconnect power supply before

servicing.

2. All wiring must comply with applicable codes and ordinances.
All wiring must have insulation rated 600VAC minimum.
Supply wires must be suitable for at least 105°C.
Suitable for insulated walls.

3. A thorough check-out of the system should be made after
installation is complete.

4. If fan motor is larger than 1/4 HP and/or electric heaters are used
for heating, additional power relays will be required

5. If retrofitting old thermostat, remove old thermostat from the
junction box, carefully noting the wire connections on the old unit.
Record wire color and terminal legends in spaces provided.

Old thermostat

wire function

Power Feed

Load Feed

Low Fan

Medium Fan

High Fan

Reverse V

Disconnect old thermostat and remove any existing backplate or
mounting plate.

6. Install the mounting bracket to the junction box with the two long
mounting screws provided.
Note: If application involves a double ganged junction box,
a backplate will be required for a complete installation.
Please consult your supplier.

7. From the wire chart found in step 5, assign, according to function,
the cable wire colors to the thermostat wire legend provided below.
Note: The control feed and the load feed will be connected together
for the 4-pipe installation. If this is a new installation, record the cable
wire colors in the thermostat legend provided below.

New Stat Wire

Function

Control Feed

Load Feed

Neutral

Heat
Cool

Low Fan

Medium Fan

High Fan/Reverse V

Earth Ground

8. Connect the thermostat wires to the cable wires recorded in step 7.
Be sure to connect green wire to earth ground.

9. Push the wires into the junction box. Tilt

the thermostat so that the bottom of the
thermostat is resting on the mounting tabs
of the mounting plate. Push the top of the
thermostat towards the wall and secure into
place with the self-tapping screw as shown
to the right.

10. Turn power on. At start up, the low fan will automatically run for

three minutes to cycle room air.
If cooling or heating is required, it may become active after the
first 30 seconds of fan run time.

1

to a grounded metallic box.

Neutral

Heat
Cool

alve

New Stat Wire

Color

Black

Orange

White

Red

Blue

Yellow

Yellow/Black

alve

Yellow/Red

Green

Cable

wire color

Cable Wire Color

Standard
Junction
box

BLACK

BLACK

4 pipe FAN COIL (3 speed fan)

R

ORANGE

THERMOSTAT INTERNAL

R = CONTROL FEED
N = NEUTRAL

MICROPROCESSOR
CONTROLLER

GREEN

888.8

WHITE

N

GH = HIGH FAN SPEED
GM = MEDIUM FAN SPEED
GL = LOW FAN SPEED
HT = HEAT VALVE
CL = COOL VALVE

2 pipe FAN COIL with aquastat (3 speed fan)

R

THERMOSTAT INTERNAL

RED

BLUE

YELLOW W/
RED STRIPE

YELLOW W/
BLACK STRIPE

YELLOW

YELLOW W/
RED STRIPE

YELLOW W/
BLACK STRIPE

YELLOW

RED

BLUE

MECHANICAL

SYSTEM COMPONENTS

GH

GM

GL

HIGH

FAN

RELAY

LINE

VOLTAGE

HT

CL

MEDIUM

HTG

LOW
FAN

RELAY

FAN

RELAY

CLG

VALVE

VALVE

Fan Coil Note:
If the mechanical system has only
two fan speeds ­Yel low - low fan
Yel low w/ Black Stripe - high fan
Yel low w/ Red Stripe- not used

NOTE:

Green wire is to be attached to
earth ground.

Aquastat or

Hot pipe

HT

Cool pipe

CL

GH

GM

GL

season change
switch

MECHANICAL

SYSTEM

COMPONENTS

LINE

VOLTAGE

MICROPROCESSOR
CONTROLLER

GREEN

ORANGE

BLACK

GREEN

888.8

HEAT PUMP

R

THERMOSTAT INTERNAL

MICROPROCESSOR
CONTROLLER

WHITE

N

WHITE

N

ORANGE

R = CONTROL FEED
N = NEUTRAL
GH = HIGH FAN SPEED
GM = MEDIUM FAN SPEED
GL = LOW FAN SPEED
HT = HEAT VALVE
CL = COOL VALVE

888.8

LF

YELLOW W/
BLACK STRIPE

YELLOW

RED

BLUE

YELLOW W/
RED STRIPE

R = CONTROL FEED
N = NEUTRAL
GH = HIGH FAN SPEED
GL = LOW FAN SPEED
W2 = AUXILIARY HEAT
Y = COMPRESSOR
RV = REVERSING VALVE

VALVE

GH

GL

W2

Y

RV

MEDIUM

LOW

FAN

FAN

RELAY

RELAY

MECHANICAL

SYSTEM COMPONENTS

COMP

RELAY

AUX

HEAT

RELAY

REV

VALVE

HIGH

FAN

RELAY

LOW

FAN

RELAY

HIGH

FAN

RELAY

LINE

VOLTAGE

2