Crestron CHV-THSTAT Operation And Installation Manual page 33

Crestron CHV-TSTAT and CHV-THSTAT
Operations and Installation Guide – DOC. 8163C
3. Slab Systems
Slab heating works from the ground up. The heating components are installed
below the floor or are embedded in a concrete slab. Heat radiates from the floor
to warm the space above. The CHV-TSTAT and CHV-THSTAT support seven
variations of slab heat systems.
SLAB 1: Floor warming only. Operates the slab heat to maintain a particular
slab temperature. System mode is enabled/disabled with Floor
Warming Heat and OFF inputs. Slab is maintained at the slab setpoint
temperature value. Connection to the slab output relay is terminal W1.
Refer to setup on page 34.
SLAB 2: One stage space heat with slab maximum. Maintains a particular air
temperature using the slab to heat the space. Will not heat over the
slab maximum temperature even if this results in the space being
under-heated. Connection to the slab output relay is terminal W1.
Refer to setup on page 37.
SLAB 3: One stage space heat with slab maximum and slab minimum.
Performs the same operation as SLAB 2, and also keeps the slab at
least as warm as slab setpoint. This may result in the space being
overheated to maintain the slab minimum temperature. Connection to
the slab output relay is terminal W1. Refer to setup on page 40.
SLAB 4A: Two-stage space heat with slab maximum and one stage cool.
Maintains the air temperature using the slab for heat, up to the slab
maximum. Augments the air heating by using a second stage of heat
(generally a forced air system). Allows the second stage to operate by
itself should the slab reach is maximum temperature and shut off.
Cools the space with cooling call. Intended for heat-cool type forced
air systems, with relay output connections to terminal W1 for slab,
terminal W2 for 2
setup on page 43.
SLAB 4B: Same operation as SLAB4A, but intended for a heat pump type
second stage. Relay output connections are terminal W1 for slab heat,
with heat pump-type connections on terminals Y1/O/G for cooling
and heating calls. Aux heat is on terminal W2. Refer to setup on page
46.
SLAB 5A: One stage space heat and cool with floor warming. Combines the
operation of a space heating/cooling thermostat with a floor-warming
thermostat. Maintains the slab at slab setpoint, and maintains the
space at the heat, cool, or auto setpoints. Systems effectively operate
independently. Heat/Cool/Auto/Off sets the space control modes, and
Floor Warming HEAT/OFF sets the slab mode. Intended for heat-
cool style systems, with slab connection on terminal W1, space heat
on terminal W2, and space cool on terminal Y1. Refer to setup on
page 49.
SLAB 5B: Same as SLAB5A, but for heat pump space systems, with slab heat
on terminal W1, and space heat/cool on terminals Y1/O/G. Aux heat
is on terminal W2. Refer to setup on page 52.
nd
stage heat, and terminal Y1 for cooling. Refer to
Thermostats: CHV-TSTAT and CHV-THSTAT • 27
Thermostats